/*
* Copyright 2010-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package com.amazonaws.services.dynamodbv2;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import com.amazonaws.AmazonClientException;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.handlers.AsyncHandler;
import com.amazonaws.ClientConfiguration;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.AWSCredentialsProvider;
import com.amazonaws.auth.DefaultAWSCredentialsProviderChain;
import com.amazonaws.services.dynamodbv2.model.*;
/**
* Interface for accessing Amazon DynamoDB asynchronously. <fullname>Amazon
* DynamoDB</fullname>
* <p>
* This is the Amazon DynamoDB API Reference. This guide provides descriptions
* of the low-level DynamoDB API.
* </p>
* <p>
* This guide is intended for use with the following DynamoDB documentation:
* </p>
* <ul>
* <li>
* <p>
* <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/gettingstartedguide/"
* >Amazon DynamoDB Getting Started Guide</a> - provides hands-on exercises that
* help you learn the basics of working with DynamoDB. <i>If you are new to
* DynamoDB, we recommend that you begin with the Getting Started Guide.</i>
* </p>
* </li>
* <li>
* <p>
* <a href="http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/">
* Amazon DynamoDB Developer Guide</a> - contains detailed information about
* DynamoDB concepts, usage, and best practices.
* </p>
* </li>
* <li>
* <p>
* <a href="http://docs.aws.amazon.com/dynamodbstreams/latest/APIReference/">
* Amazon DynamoDB Streams API Reference</a> - provides descriptions and samples
* of the DynamoDB Streams API. (For more information, see <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Streams.html"
* >Capturing Table Activity with DynamoDB Streams</a> in the Amazon DynamoDB
* Developer Guide.)
* </p>
* </li>
* </ul>
* <p>
* Instead of making the requests to the low-level DynamoDB API directly from
* your application, we recommend that you use the AWS Software Development Kits
* (SDKs). The easy-to-use libraries in the AWS SDKs make it unnecessary to call
* the low-level DynamoDB API directly from your application. The libraries take
* care of request authentication, serialization, and connection management. For
* more information, see <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/UsingAWSSDK.html"
* >Using the AWS SDKs with DynamoDB</a> in the Amazon DynamoDB Developer Guide.
* </p>
* <p>
* If you decide to code against the low-level DynamoDB API directly, you will
* need to write the necessary code to authenticate your requests. For more
* information on signing your requests, see <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/API.html"
* >Using the DynamoDB API</a> in the <i>Amazon DynamoDB Developer Guide</i>.
* </p>
* <p>
* The following are short descriptions of each low-level API action, organized
* by function.
* </p>
* <p>
* <b>Managing Tables</b>
* </p>
* <ul>
* <li>
* <p>
* <i>CreateTable</i> - Creates a table with user-specified provisioned
* throughput settings. You must define a primary key for the table - either a
* simple primary key (partition key), or a composite primary key (partition key
* and sort key). Optionally, you can create one or more secondary indexes,
* which provide fast data access using non-key attributes.
* </p>
* </li>
* <li>
* <p>
* <i>DescribeTable</i> - Returns metadata for a table, such as table size,
* status, and index information.
* </p>
* </li>
* <li>
* <p>
* <i>UpdateTable</i> - Modifies the provisioned throughput settings for a
* table. Optionally, you can modify the provisioned throughput settings for
* global secondary indexes on the table.
* </p>
* </li>
* <li>
* <p>
* <i>ListTables</i> - Returns a list of all tables associated with the current
* AWS account and endpoint.
* </p>
* </li>
* <li>
* <p>
* <i>DeleteTable</i> - Deletes a table and all of its indexes.
* </p>
* </li>
* </ul>
* <p>
* For conceptual information about managing tables, see <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/WorkingWithTables.html"
* >Working with Tables</a> in the <i>Amazon DynamoDB Developer Guide</i>.
* </p>
* <p>
* <b>Reading Data</b>
* </p>
* <ul>
* <li>
* <p>
* <i>GetItem</i> - Returns a set of attributes for the item that has a given
* primary key. By default, <i>GetItem</i> performs an eventually consistent
* read; however, applications can request a strongly consistent read instead.
* </p>
* </li>
* <li>
* <p>
* <i>BatchGetItem</i> - Performs multiple <i>GetItem</i> requests for data
* items using their primary keys, from one table or multiple tables. The
* response from <i>BatchGetItem</i> has a size limit of 16 MB and returns a
* maximum of 100 items. Both eventually consistent and strongly consistent
* reads can be used.
* </p>
* </li>
* <li>
* <p>
* <i>Query</i> - Returns one or more items from a table or a secondary index.
* You must provide a specific value for the partition key. You can narrow the
* scope of the query using comparison operators against a sort key value, or on
* the index key. <i>Query</i> supports either eventual or strong consistency. A
* single response has a size limit of 1 MB.
* </p>
* </li>
* <li>
* <p>
* <i>Scan</i> - Reads every item in a table; the result set is eventually
* consistent. You can limit the number of items returned by filtering the data
* attributes, using conditional expressions. <i>Scan</i> can be used to enable
* ad-hoc querying of a table against non-key attributes; however, since this is
* a full table scan without using an index, <i>Scan</i> should not be used for
* any application query use case that requires predictable performance.
* </p>
* </li>
* </ul>
* <p>
* For conceptual information about reading data, see <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/WorkingWithItems.html"
* >Working with Items</a> and <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/QueryAndScan.html"
* >Query and Scan Operations</a> in the <i>Amazon DynamoDB Developer Guide</i>.
* </p>
* <p>
* <b>Modifying Data</b>
* </p>
* <ul>
* <li>
* <p>
* <i>PutItem</i> - Creates a new item, or replaces an existing item with a new
* item (including all the attributes). By default, if an item in the table
* already exists with the same primary key, the new item completely replaces
* the existing item. You can use conditional operators to replace an item only
* if its attribute values match certain conditions, or to insert a new item
* only if that item doesn't already exist.
* </p>
* </li>
* <li>
* <p>
* <i>UpdateItem</i> - Modifies the attributes of an existing item. You can also
* use conditional operators to perform an update only if the item's attribute
* values match certain conditions.
* </p>
* </li>
* <li>
* <p>
* <i>DeleteItem</i> - Deletes an item in a table by primary key. You can use
* conditional operators to perform a delete an item only if the item's
* attribute values match certain conditions.
* </p>
* </li>
* <li>
* <p>
* <i>BatchWriteItem</i> - Performs multiple <i>PutItem</i> and
* <i>DeleteItem</i> requests across multiple tables in a single request. A
* failure of any request(s) in the batch will not cause the entire
* <i>BatchWriteItem</i> operation to fail. Supports batches of up to 25 items
* to put or delete, with a maximum total request size of 16 MB.
* </p>
* </li>
* </ul>
* <p>
* For conceptual information about modifying data, see <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/WorkingWithItems.html"
* >Working with Items</a> and <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/QueryAndScan.html"
* >Query and Scan Operations</a> in the <i>Amazon DynamoDB Developer Guide</i>.
* </p>
**/
public class AmazonDynamoDBAsyncClient extends AmazonDynamoDBClient implements AmazonDynamoDBAsync {
/**
* Executor service for executing asynchronous requests.
*/
private ExecutorService executorService;
private static final int DEFAULT_THREAD_POOL_SIZE = 10;
/**
* Constructs a new asynchronous client to invoke service methods on Amazon
* DynamoDB. A credentials provider chain will be used that searches for
* credentials in this order:
* <ul>
* <li>Environment Variables - AWS_ACCESS_KEY_ID and AWS_SECRET_KEY</li>
* <li>Java System Properties - aws.accessKeyId and aws.secretKey</li>
* <li>Instance profile credentials delivered through the Amazon EC2
* metadata service</li>
* </ul>
* <p>
* All service calls made using this new client object are blocking, and
* will not return until the service call completes.
*
* @see DefaultAWSCredentialsProviderChain
*/
@Deprecated
public AmazonDynamoDBAsyncClient() {
this(new DefaultAWSCredentialsProviderChain());
}
/**
* Constructs a new asynchronous client to invoke service methods on Amazon
* DynamoDB. A credentials provider chain will be used that searches for
* credentials in this order:
* <ul>
* <li>Environment Variables - AWS_ACCESS_KEY_ID and AWS_SECRET_KEY</li>
* <li>Java System Properties - aws.accessKeyId and aws.secretKey</li>
* <li>Instance profile credentials delivered through the Amazon EC2
* metadata service</li>
* </ul>
* <p>
* All service calls made using this new client object are blocking, and
* will not return until the service call completes.
*
* @param clientConfiguration The client configuration options controlling
* how this client connects to Amazon DynamoDB (ex: proxy
* settings, retry counts, etc.).
* @see DefaultAWSCredentialsProviderChain
*/
@Deprecated
public AmazonDynamoDBAsyncClient(ClientConfiguration clientConfiguration) {
this(new DefaultAWSCredentialsProviderChain(), clientConfiguration, Executors
.newFixedThreadPool(clientConfiguration.getMaxConnections()));
}
/**
* Constructs a new asynchronous client to invoke service methods on Amazon
* DynamoDB using the specified AWS account credentials. Default client
* settings will be used, and a fixed size thread pool will be created for
* executing the asynchronous tasks.
* <p>
* All calls made using this new client object are non-blocking, and will
* immediately return a Java Future object that the caller can later check
* to see if the service call has actually completed.
*
* @param awsCredentials The AWS credentials (access key ID and secret key)
* to use when authenticating with AWS services.
*/
public AmazonDynamoDBAsyncClient(AWSCredentials awsCredentials) {
this(awsCredentials, Executors.newFixedThreadPool(DEFAULT_THREAD_POOL_SIZE));
}
/**
* Constructs a new asynchronous client to invoke service methods on Amazon
* DynamoDB using the specified AWS account credentials and executor
* service. Default client settings will be used.
* <p>
* All calls made using this new client object are non-blocking, and will
* immediately return a Java Future object that the caller can later check
* to see if the service call has actually completed.
*
* @param awsCredentials The AWS credentials (access key ID and secret key)
* to use when authenticating with AWS services.
* @param executorService The executor service by which all asynchronous
* requests will be executed.
*/
public AmazonDynamoDBAsyncClient(AWSCredentials awsCredentials, ExecutorService executorService) {
super(awsCredentials);
this.executorService = executorService;
}
/**
* Constructs a new asynchronous client to invoke service methods on Amazon
* DynamoDB using the specified AWS account credentials, executor service,
* and client configuration options.
* <p>
* All calls made using this new client object are non-blocking, and will
* immediately return a Java Future object that the caller can later check
* to see if the service call has actually completed.
*
* @param awsCredentials The AWS credentials (access key ID and secret key)
* to use when authenticating with AWS services.
* @param clientConfiguration Client configuration options (ex: max retry
* limit, proxy settings, etc).
* @param executorService The executor service by which all asynchronous
* requests will be executed.
*/
public AmazonDynamoDBAsyncClient(AWSCredentials awsCredentials,
ClientConfiguration clientConfiguration, ExecutorService executorService) {
super(awsCredentials, clientConfiguration);
this.executorService = executorService;
}
/**
* Constructs a new asynchronous client to invoke service methods on Amazon
* DynamoDB using the specified AWS account credentials provider. Default
* client settings will be used, and a fixed size thread pool will be
* created for executing the asynchronous tasks.
* <p>
* All calls made using this new client object are non-blocking, and will
* immediately return a Java Future object that the caller can later check
* to see if the service call has actually completed.
*
* @param awsCredentialsProvider The AWS credentials provider which will
* provide credentials to authenticate requests with AWS
* services.
*/
public AmazonDynamoDBAsyncClient(AWSCredentialsProvider awsCredentialsProvider) {
this(awsCredentialsProvider, Executors.newFixedThreadPool(DEFAULT_THREAD_POOL_SIZE));
}
/**
* Constructs a new asynchronous client to invoke service methods on Amazon
* DynamoDB using the specified AWS account credentials provider and
* executor service. Default client settings will be used.
* <p>
* All calls made using this new client object are non-blocking, and will
* immediately return a Java Future object that the caller can later check
* to see if the service call has actually completed.
*
* @param awsCredentialsProvider The AWS credentials provider which will
* provide credentials to authenticate requests with AWS
* services.
* @param executorService The executor service by which all asynchronous
* requests will be executed.
*/
public AmazonDynamoDBAsyncClient(AWSCredentialsProvider awsCredentialsProvider,
ExecutorService executorService) {
this(awsCredentialsProvider, new ClientConfiguration(), executorService);
}
/**
* Constructs a new asynchronous client to invoke service methods on Amazon
* DynamoDB using the specified AWS account credentials provider and client
* configuration options.
* <p>
* All calls made using this new client object are non-blocking, and will
* immediately return a Java Future object that the caller can later check
* to see if the service call has actually completed.
*
* @param awsCredentialsProvider The AWS credentials provider which will
* provide credentials to authenticate requests with AWS
* services.
* @param clientConfiguration Client configuration options (ex: max retry
* limit, proxy settings, etc).
*/
public AmazonDynamoDBAsyncClient(AWSCredentialsProvider awsCredentialsProvider,
ClientConfiguration clientConfiguration) {
this(awsCredentialsProvider, clientConfiguration, Executors
.newFixedThreadPool(clientConfiguration.getMaxConnections()));
}
/**
* Constructs a new asynchronous client to invoke service methods on Amazon
* DynamoDB using the specified AWS account credentials provider, executor
* service, and client configuration options.
* <p>
* All calls made using this new client object are non-blocking, and will
* immediately return a Java Future object that the caller can later check
* to see if the service call has actually completed.
*
* @param awsCredentialsProvider The AWS credentials provider which will
* provide credentials to authenticate requests with AWS
* services.
* @param clientConfiguration Client configuration options (ex: max retry
* limit, proxy settings, etc).
* @param executorService The executor service by which all asynchronous
* requests will be executed.
*/
public AmazonDynamoDBAsyncClient(AWSCredentialsProvider awsCredentialsProvider,
ClientConfiguration clientConfiguration, ExecutorService executorService) {
super(awsCredentialsProvider, clientConfiguration);
this.executorService = executorService;
}
/**
* Returns the executor service used by this async client to execute
* requests.
*
* @return The executor service used by this async client to execute
* requests.
*/
public ExecutorService getExecutorService() {
return executorService;
}
/**
* Shuts down the client, releasing all managed resources. This includes
* forcibly terminating all pending asynchronous service calls. Clients who
* wish to give pending asynchronous service calls time to complete should
* call getExecutorService().shutdown() followed by
* getExecutorService().awaitTermination() prior to calling this method.
*/
@Override
public void shutdown() {
super.shutdown();
executorService.shutdownNow();
}
/**
* <p>
* The <i>BatchGetItem</i> operation returns the attributes of one or more
* items from one or more tables. You identify requested items by primary
* key.
* </p>
* <p>
* A single operation can retrieve up to 16 MB of data, which can contain as
* many as 100 items. <i>BatchGetItem</i> will return a partial result if
* the response size limit is exceeded, the table's provisioned throughput
* is exceeded, or an internal processing failure occurs. If a partial
* result is returned, the operation returns a value for
* <i>UnprocessedKeys</i>. You can use this value to retry the operation
* starting with the next item to get.
* </p>
* <important>
* <p>
* If you request more than 100 items <i>BatchGetItem</i> will return a
* <i>ValidationException</i> with the message
* "Too many items requested for the BatchGetItem call".
* </p>
* </important>
* <p>
* For example, if you ask to retrieve 100 items, but each individual item
* is 300 KB in size, the system returns 52 items (so as not to exceed the
* 16 MB limit). It also returns an appropriate <i>UnprocessedKeys</i> value
* so you can get the next page of results. If desired, your application can
* include its own logic to assemble the pages of results into one data set.
* </p>
* <p>
* If <i>none</i> of the items can be processed due to insufficient
* provisioned throughput on all of the tables in the request, then
* <i>BatchGetItem</i> will return a
* <i>ProvisionedThroughputExceededException</i>. If <i>at least one</i> of
* the items is successfully processed, then <i>BatchGetItem</i> completes
* successfully, while returning the keys of the unread items in
* <i>UnprocessedKeys</i>.
* </p>
* <important>
* <p>
* If DynamoDB returns any unprocessed items, you should retry the batch
* operation on those items. However, <i>we strongly recommend that you use
* an exponential backoff algorithm</i>. If you retry the batch operation
* immediately, the underlying read or write requests can still fail due to
* throttling on the individual tables. If you delay the batch operation
* using exponential backoff, the individual requests in the batch are much
* more likely to succeed.
* </p>
* <p>
* For more information, see <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ErrorHandling.html#BatchOperations"
* >Batch Operations and Error Handling</a> in the <i>Amazon DynamoDB
* Developer Guide</i>.
* </p>
* </important>
* <p>
* By default, <i>BatchGetItem</i> performs eventually consistent reads on
* every table in the request. If you want strongly consistent reads
* instead, you can set <i>ConsistentRead</i> to <code>true</code> for any
* or all tables.
* </p>
* <p>
* In order to minimize response latency, <i>BatchGetItem</i> retrieves
* items in parallel.
* </p>
* <p>
* When designing your application, keep in mind that DynamoDB does not
* return items in any particular order. To help parse the response by item,
* include the primary key values for the items in your request in the
* <i>AttributesToGet</i> parameter.
* </p>
* <p>
* If a requested item does not exist, it is not returned in the result.
* Requests for nonexistent items consume the minimum read capacity units
* according to the type of read. For more information, see <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/WorkingWithTables.html#CapacityUnitCalculations"
* >Capacity Units Calculations</a> in the <i>Amazon DynamoDB Developer
* Guide</i>.
* </p>
*
* @param batchGetItemRequest <p>
* Represents the input of a <i>BatchGetItem</i> operation.
* </p>
* @return A Java Future object containing the response from the
* BatchGetItem service method, as returned by Amazon DynamoDB.
* @throws ProvisionedThroughputExceededException
* @throws ResourceNotFoundException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<BatchGetItemResult> batchGetItemAsync(
final BatchGetItemRequest batchGetItemRequest) throws AmazonServiceException,
AmazonClientException {
return executorService.submit(new Callable<BatchGetItemResult>() {
public BatchGetItemResult call() throws Exception {
return batchGetItem(batchGetItemRequest);
}
});
}
/**
* <p>
* The <i>BatchGetItem</i> operation returns the attributes of one or more
* items from one or more tables. You identify requested items by primary
* key.
* </p>
* <p>
* A single operation can retrieve up to 16 MB of data, which can contain as
* many as 100 items. <i>BatchGetItem</i> will return a partial result if
* the response size limit is exceeded, the table's provisioned throughput
* is exceeded, or an internal processing failure occurs. If a partial
* result is returned, the operation returns a value for
* <i>UnprocessedKeys</i>. You can use this value to retry the operation
* starting with the next item to get.
* </p>
* <important>
* <p>
* If you request more than 100 items <i>BatchGetItem</i> will return a
* <i>ValidationException</i> with the message
* "Too many items requested for the BatchGetItem call".
* </p>
* </important>
* <p>
* For example, if you ask to retrieve 100 items, but each individual item
* is 300 KB in size, the system returns 52 items (so as not to exceed the
* 16 MB limit). It also returns an appropriate <i>UnprocessedKeys</i> value
* so you can get the next page of results. If desired, your application can
* include its own logic to assemble the pages of results into one data set.
* </p>
* <p>
* If <i>none</i> of the items can be processed due to insufficient
* provisioned throughput on all of the tables in the request, then
* <i>BatchGetItem</i> will return a
* <i>ProvisionedThroughputExceededException</i>. If <i>at least one</i> of
* the items is successfully processed, then <i>BatchGetItem</i> completes
* successfully, while returning the keys of the unread items in
* <i>UnprocessedKeys</i>.
* </p>
* <important>
* <p>
* If DynamoDB returns any unprocessed items, you should retry the batch
* operation on those items. However, <i>we strongly recommend that you use
* an exponential backoff algorithm</i>. If you retry the batch operation
* immediately, the underlying read or write requests can still fail due to
* throttling on the individual tables. If you delay the batch operation
* using exponential backoff, the individual requests in the batch are much
* more likely to succeed.
* </p>
* <p>
* For more information, see <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ErrorHandling.html#BatchOperations"
* >Batch Operations and Error Handling</a> in the <i>Amazon DynamoDB
* Developer Guide</i>.
* </p>
* </important>
* <p>
* By default, <i>BatchGetItem</i> performs eventually consistent reads on
* every table in the request. If you want strongly consistent reads
* instead, you can set <i>ConsistentRead</i> to <code>true</code> for any
* or all tables.
* </p>
* <p>
* In order to minimize response latency, <i>BatchGetItem</i> retrieves
* items in parallel.
* </p>
* <p>
* When designing your application, keep in mind that DynamoDB does not
* return items in any particular order. To help parse the response by item,
* include the primary key values for the items in your request in the
* <i>AttributesToGet</i> parameter.
* </p>
* <p>
* If a requested item does not exist, it is not returned in the result.
* Requests for nonexistent items consume the minimum read capacity units
* according to the type of read. For more information, see <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/WorkingWithTables.html#CapacityUnitCalculations"
* >Capacity Units Calculations</a> in the <i>Amazon DynamoDB Developer
* Guide</i>.
* </p>
*
* @param batchGetItemRequest <p>
* Represents the input of a <i>BatchGetItem</i> operation.
* </p>
* @return A Java Future object containing the response from the
* BatchGetItem service method, as returned by Amazon DynamoDB.
* @throws ProvisionedThroughputExceededException
* @throws ResourceNotFoundException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<BatchGetItemResult> batchGetItemAsync(
final BatchGetItemRequest batchGetItemRequest,
final AsyncHandler<BatchGetItemRequest, BatchGetItemResult> asyncHandler)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<BatchGetItemResult>() {
public BatchGetItemResult call() throws Exception {
BatchGetItemResult result = null;
try {
result = batchGetItem(batchGetItemRequest);
} catch (Exception ex) {
asyncHandler.onError(ex);
throw ex;
}
asyncHandler.onSuccess(batchGetItemRequest, result);
return result;
}
});
}
/**
* <p>
* The <i>BatchWriteItem</i> operation puts or deletes multiple items in one
* or more tables. A single call to <i>BatchWriteItem</i> can write up to 16
* MB of data, which can comprise as many as 25 put or delete requests.
* Individual items to be written can be as large as 400 KB.
* </p>
* <note>
* <p>
* <i>BatchWriteItem</i> cannot update items. To update items, use the
* <i>UpdateItem</i> API.
* </p>
* </note>
* <p>
* The individual <i>PutItem</i> and <i>DeleteItem</i> operations specified
* in <i>BatchWriteItem</i> are atomic; however <i>BatchWriteItem</i> as a
* whole is not. If any requested operations fail because the table's
* provisioned throughput is exceeded or an internal processing failure
* occurs, the failed operations are returned in the <i>UnprocessedItems</i>
* response parameter. You can investigate and optionally resend the
* requests. Typically, you would call <i>BatchWriteItem</i> in a loop. Each
* iteration would check for unprocessed items and submit a new
* <i>BatchWriteItem</i> request with those unprocessed items until all
* items have been processed.
* </p>
* <p>
* Note that if <i>none</i> of the items can be processed due to
* insufficient provisioned throughput on all of the tables in the request,
* then <i>BatchWriteItem</i> will return a
* <i>ProvisionedThroughputExceededException</i>.
* </p>
* <important>
* <p>
* If DynamoDB returns any unprocessed items, you should retry the batch
* operation on those items. However, <i>we strongly recommend that you use
* an exponential backoff algorithm</i>. If you retry the batch operation
* immediately, the underlying read or write requests can still fail due to
* throttling on the individual tables. If you delay the batch operation
* using exponential backoff, the individual requests in the batch are much
* more likely to succeed.
* </p>
* <p>
* For more information, see <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ErrorHandling.html#BatchOperations"
* >Batch Operations and Error Handling</a> in the <i>Amazon DynamoDB
* Developer Guide</i>.
* </p>
* </important>
* <p>
* With <i>BatchWriteItem</i>, you can efficiently write or delete large
* amounts of data, such as from Amazon Elastic MapReduce (EMR), or copy
* data from another database into DynamoDB. In order to improve performance
* with these large-scale operations, <i>BatchWriteItem</i> does not behave
* in the same way as individual <i>PutItem</i> and <i>DeleteItem</i> calls
* would. For example, you cannot specify conditions on individual put and
* delete requests, and <i>BatchWriteItem</i> does not return deleted items
* in the response.
* </p>
* <p>
* If you use a programming language that supports concurrency, you can use
* threads to write items in parallel. Your application must include the
* necessary logic to manage the threads. With languages that don't support
* threading, you must update or delete the specified items one at a time.
* In both situations, <i>BatchWriteItem</i> provides an alternative where
* the API performs the specified put and delete operations in parallel,
* giving you the power of the thread pool approach without having to
* introduce complexity into your application.
* </p>
* <p>
* Parallel processing reduces latency, but each specified put and delete
* request consumes the same number of write capacity units whether it is
* processed in parallel or not. Delete operations on nonexistent items
* consume one write capacity unit.
* </p>
* <p>
* If one or more of the following is true, DynamoDB rejects the entire
* batch write operation:
* </p>
* <ul>
* <li>
* <p>
* One or more tables specified in the <i>BatchWriteItem</i> request does
* not exist.
* </p>
* </li>
* <li>
* <p>
* Primary key attributes specified on an item in the request do not match
* those in the corresponding table's primary key schema.
* </p>
* </li>
* <li>
* <p>
* You try to perform multiple operations on the same item in the same
* <i>BatchWriteItem</i> request. For example, you cannot put and delete the
* same item in the same <i>BatchWriteItem</i> request.
* </p>
* </li>
* <li>
* <p>
* There are more than 25 requests in the batch.
* </p>
* </li>
* <li>
* <p>
* Any individual item in a batch exceeds 400 KB.
* </p>
* </li>
* <li>
* <p>
* The total request size exceeds 16 MB.
* </p>
* </li>
* </ul>
*
* @param batchWriteItemRequest <p>
* Represents the input of a <i>BatchWriteItem</i> operation.
* </p>
* @return A Java Future object containing the response from the
* BatchWriteItem service method, as returned by Amazon DynamoDB.
* @throws ProvisionedThroughputExceededException
* @throws ResourceNotFoundException
* @throws ItemCollectionSizeLimitExceededException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<BatchWriteItemResult> batchWriteItemAsync(
final BatchWriteItemRequest batchWriteItemRequest) throws AmazonServiceException,
AmazonClientException {
return executorService.submit(new Callable<BatchWriteItemResult>() {
public BatchWriteItemResult call() throws Exception {
return batchWriteItem(batchWriteItemRequest);
}
});
}
/**
* <p>
* The <i>BatchWriteItem</i> operation puts or deletes multiple items in one
* or more tables. A single call to <i>BatchWriteItem</i> can write up to 16
* MB of data, which can comprise as many as 25 put or delete requests.
* Individual items to be written can be as large as 400 KB.
* </p>
* <note>
* <p>
* <i>BatchWriteItem</i> cannot update items. To update items, use the
* <i>UpdateItem</i> API.
* </p>
* </note>
* <p>
* The individual <i>PutItem</i> and <i>DeleteItem</i> operations specified
* in <i>BatchWriteItem</i> are atomic; however <i>BatchWriteItem</i> as a
* whole is not. If any requested operations fail because the table's
* provisioned throughput is exceeded or an internal processing failure
* occurs, the failed operations are returned in the <i>UnprocessedItems</i>
* response parameter. You can investigate and optionally resend the
* requests. Typically, you would call <i>BatchWriteItem</i> in a loop. Each
* iteration would check for unprocessed items and submit a new
* <i>BatchWriteItem</i> request with those unprocessed items until all
* items have been processed.
* </p>
* <p>
* Note that if <i>none</i> of the items can be processed due to
* insufficient provisioned throughput on all of the tables in the request,
* then <i>BatchWriteItem</i> will return a
* <i>ProvisionedThroughputExceededException</i>.
* </p>
* <important>
* <p>
* If DynamoDB returns any unprocessed items, you should retry the batch
* operation on those items. However, <i>we strongly recommend that you use
* an exponential backoff algorithm</i>. If you retry the batch operation
* immediately, the underlying read or write requests can still fail due to
* throttling on the individual tables. If you delay the batch operation
* using exponential backoff, the individual requests in the batch are much
* more likely to succeed.
* </p>
* <p>
* For more information, see <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ErrorHandling.html#BatchOperations"
* >Batch Operations and Error Handling</a> in the <i>Amazon DynamoDB
* Developer Guide</i>.
* </p>
* </important>
* <p>
* With <i>BatchWriteItem</i>, you can efficiently write or delete large
* amounts of data, such as from Amazon Elastic MapReduce (EMR), or copy
* data from another database into DynamoDB. In order to improve performance
* with these large-scale operations, <i>BatchWriteItem</i> does not behave
* in the same way as individual <i>PutItem</i> and <i>DeleteItem</i> calls
* would. For example, you cannot specify conditions on individual put and
* delete requests, and <i>BatchWriteItem</i> does not return deleted items
* in the response.
* </p>
* <p>
* If you use a programming language that supports concurrency, you can use
* threads to write items in parallel. Your application must include the
* necessary logic to manage the threads. With languages that don't support
* threading, you must update or delete the specified items one at a time.
* In both situations, <i>BatchWriteItem</i> provides an alternative where
* the API performs the specified put and delete operations in parallel,
* giving you the power of the thread pool approach without having to
* introduce complexity into your application.
* </p>
* <p>
* Parallel processing reduces latency, but each specified put and delete
* request consumes the same number of write capacity units whether it is
* processed in parallel or not. Delete operations on nonexistent items
* consume one write capacity unit.
* </p>
* <p>
* If one or more of the following is true, DynamoDB rejects the entire
* batch write operation:
* </p>
* <ul>
* <li>
* <p>
* One or more tables specified in the <i>BatchWriteItem</i> request does
* not exist.
* </p>
* </li>
* <li>
* <p>
* Primary key attributes specified on an item in the request do not match
* those in the corresponding table's primary key schema.
* </p>
* </li>
* <li>
* <p>
* You try to perform multiple operations on the same item in the same
* <i>BatchWriteItem</i> request. For example, you cannot put and delete the
* same item in the same <i>BatchWriteItem</i> request.
* </p>
* </li>
* <li>
* <p>
* There are more than 25 requests in the batch.
* </p>
* </li>
* <li>
* <p>
* Any individual item in a batch exceeds 400 KB.
* </p>
* </li>
* <li>
* <p>
* The total request size exceeds 16 MB.
* </p>
* </li>
* </ul>
*
* @param batchWriteItemRequest <p>
* Represents the input of a <i>BatchWriteItem</i> operation.
* </p>
* @return A Java Future object containing the response from the
* BatchWriteItem service method, as returned by Amazon DynamoDB.
* @throws ProvisionedThroughputExceededException
* @throws ResourceNotFoundException
* @throws ItemCollectionSizeLimitExceededException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<BatchWriteItemResult> batchWriteItemAsync(
final BatchWriteItemRequest batchWriteItemRequest,
final AsyncHandler<BatchWriteItemRequest, BatchWriteItemResult> asyncHandler)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<BatchWriteItemResult>() {
public BatchWriteItemResult call() throws Exception {
BatchWriteItemResult result = null;
try {
result = batchWriteItem(batchWriteItemRequest);
} catch (Exception ex) {
asyncHandler.onError(ex);
throw ex;
}
asyncHandler.onSuccess(batchWriteItemRequest, result);
return result;
}
});
}
/**
* <p>
* The <i>CreateTable</i> operation adds a new table to your account. In an
* AWS account, table names must be unique within each region. That is, you
* can have two tables with same name if you create the tables in different
* regions.
* </p>
* <p>
* <i>CreateTable</i> is an asynchronous operation. Upon receiving a
* <i>CreateTable</i> request, DynamoDB immediately returns a response with
* a <i>TableStatus</i> of <code>CREATING</code>. After the table is
* created, DynamoDB sets the <i>TableStatus</i> to <code>ACTIVE</code>. You
* can perform read and write operations only on an <code>ACTIVE</code>
* table.
* </p>
* <p>
* You can optionally define secondary indexes on the new table, as part of
* the <i>CreateTable</i> operation. If you want to create multiple tables
* with secondary indexes on them, you must create the tables sequentially.
* Only one table with secondary indexes can be in the <code>CREATING</code>
* state at any given time.
* </p>
* <p>
* You can use the <i>DescribeTable</i> API to check the table status.
* </p>
*
* @param createTableRequest <p>
* Represents the input of a <i>CreateTable</i> operation.
* </p>
* @return A Java Future object containing the response from the CreateTable
* service method, as returned by Amazon DynamoDB.
* @throws ResourceInUseException
* @throws LimitExceededException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<CreateTableResult> createTableAsync(final CreateTableRequest createTableRequest)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<CreateTableResult>() {
public CreateTableResult call() throws Exception {
return createTable(createTableRequest);
}
});
}
/**
* <p>
* The <i>CreateTable</i> operation adds a new table to your account. In an
* AWS account, table names must be unique within each region. That is, you
* can have two tables with same name if you create the tables in different
* regions.
* </p>
* <p>
* <i>CreateTable</i> is an asynchronous operation. Upon receiving a
* <i>CreateTable</i> request, DynamoDB immediately returns a response with
* a <i>TableStatus</i> of <code>CREATING</code>. After the table is
* created, DynamoDB sets the <i>TableStatus</i> to <code>ACTIVE</code>. You
* can perform read and write operations only on an <code>ACTIVE</code>
* table.
* </p>
* <p>
* You can optionally define secondary indexes on the new table, as part of
* the <i>CreateTable</i> operation. If you want to create multiple tables
* with secondary indexes on them, you must create the tables sequentially.
* Only one table with secondary indexes can be in the <code>CREATING</code>
* state at any given time.
* </p>
* <p>
* You can use the <i>DescribeTable</i> API to check the table status.
* </p>
*
* @param createTableRequest <p>
* Represents the input of a <i>CreateTable</i> operation.
* </p>
* @return A Java Future object containing the response from the CreateTable
* service method, as returned by Amazon DynamoDB.
* @throws ResourceInUseException
* @throws LimitExceededException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<CreateTableResult> createTableAsync(final CreateTableRequest createTableRequest,
final AsyncHandler<CreateTableRequest, CreateTableResult> asyncHandler)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<CreateTableResult>() {
public CreateTableResult call() throws Exception {
CreateTableResult result = null;
try {
result = createTable(createTableRequest);
} catch (Exception ex) {
asyncHandler.onError(ex);
throw ex;
}
asyncHandler.onSuccess(createTableRequest, result);
return result;
}
});
}
/**
* <p>
* Deletes a single item in a table by primary key. You can perform a
* conditional delete operation that deletes the item if it exists, or if it
* has an expected attribute value.
* </p>
* <p>
* In addition to deleting an item, you can also return the item's attribute
* values in the same operation, using the <i>ReturnValues</i> parameter.
* </p>
* <p>
* Unless you specify conditions, the <i>DeleteItem</i> is an idempotent
* operation; running it multiple times on the same item or attribute does
* <i>not</i> result in an error response.
* </p>
* <p>
* Conditional deletes are useful for deleting items only if specific
* conditions are met. If those conditions are met, DynamoDB performs the
* delete. Otherwise, the item is not deleted.
* </p>
*
* @param deleteItemRequest <p>
* Represents the input of a <i>DeleteItem</i> operation.
* </p>
* @return A Java Future object containing the response from the DeleteItem
* service method, as returned by Amazon DynamoDB.
* @throws ConditionalCheckFailedException
* @throws ProvisionedThroughputExceededException
* @throws ResourceNotFoundException
* @throws ItemCollectionSizeLimitExceededException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<DeleteItemResult> deleteItemAsync(final DeleteItemRequest deleteItemRequest)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<DeleteItemResult>() {
public DeleteItemResult call() throws Exception {
return deleteItem(deleteItemRequest);
}
});
}
/**
* <p>
* Deletes a single item in a table by primary key. You can perform a
* conditional delete operation that deletes the item if it exists, or if it
* has an expected attribute value.
* </p>
* <p>
* In addition to deleting an item, you can also return the item's attribute
* values in the same operation, using the <i>ReturnValues</i> parameter.
* </p>
* <p>
* Unless you specify conditions, the <i>DeleteItem</i> is an idempotent
* operation; running it multiple times on the same item or attribute does
* <i>not</i> result in an error response.
* </p>
* <p>
* Conditional deletes are useful for deleting items only if specific
* conditions are met. If those conditions are met, DynamoDB performs the
* delete. Otherwise, the item is not deleted.
* </p>
*
* @param deleteItemRequest <p>
* Represents the input of a <i>DeleteItem</i> operation.
* </p>
* @return A Java Future object containing the response from the DeleteItem
* service method, as returned by Amazon DynamoDB.
* @throws ConditionalCheckFailedException
* @throws ProvisionedThroughputExceededException
* @throws ResourceNotFoundException
* @throws ItemCollectionSizeLimitExceededException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<DeleteItemResult> deleteItemAsync(final DeleteItemRequest deleteItemRequest,
final AsyncHandler<DeleteItemRequest, DeleteItemResult> asyncHandler)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<DeleteItemResult>() {
public DeleteItemResult call() throws Exception {
DeleteItemResult result = null;
try {
result = deleteItem(deleteItemRequest);
} catch (Exception ex) {
asyncHandler.onError(ex);
throw ex;
}
asyncHandler.onSuccess(deleteItemRequest, result);
return result;
}
});
}
/**
* <p>
* The <i>DeleteTable</i> operation deletes a table and all of its items.
* After a <i>DeleteTable</i> request, the specified table is in the
* <code>DELETING</code> state until DynamoDB completes the deletion. If the
* table is in the <code>ACTIVE</code> state, you can delete it. If a table
* is in <code>CREATING</code> or <code>UPDATING</code> states, then
* DynamoDB returns a <i>ResourceInUseException</i>. If the specified table
* does not exist, DynamoDB returns a <i>ResourceNotFoundException</i>. If
* table is already in the <code>DELETING</code> state, no error is
* returned.
* </p>
* <note>
* <p>
* DynamoDB might continue to accept data read and write operations, such as
* <i>GetItem</i> and <i>PutItem</i>, on a table in the
* <code>DELETING</code> state until the table deletion is complete.
* </p>
* </note>
* <p>
* When you delete a table, any indexes on that table are also deleted.
* </p>
* <p>
* If you have DynamoDB Streams enabled on the table, then the corresponding
* stream on that table goes into the <code>DISABLED</code> state, and the
* stream is automatically deleted after 24 hours.
* </p>
* <p>
* Use the <i>DescribeTable</i> API to check the status of the table.
* </p>
*
* @param deleteTableRequest <p>
* Represents the input of a <i>DeleteTable</i> operation.
* </p>
* @return A Java Future object containing the response from the DeleteTable
* service method, as returned by Amazon DynamoDB.
* @throws ResourceInUseException
* @throws ResourceNotFoundException
* @throws LimitExceededException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<DeleteTableResult> deleteTableAsync(final DeleteTableRequest deleteTableRequest)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<DeleteTableResult>() {
public DeleteTableResult call() throws Exception {
return deleteTable(deleteTableRequest);
}
});
}
/**
* <p>
* The <i>DeleteTable</i> operation deletes a table and all of its items.
* After a <i>DeleteTable</i> request, the specified table is in the
* <code>DELETING</code> state until DynamoDB completes the deletion. If the
* table is in the <code>ACTIVE</code> state, you can delete it. If a table
* is in <code>CREATING</code> or <code>UPDATING</code> states, then
* DynamoDB returns a <i>ResourceInUseException</i>. If the specified table
* does not exist, DynamoDB returns a <i>ResourceNotFoundException</i>. If
* table is already in the <code>DELETING</code> state, no error is
* returned.
* </p>
* <note>
* <p>
* DynamoDB might continue to accept data read and write operations, such as
* <i>GetItem</i> and <i>PutItem</i>, on a table in the
* <code>DELETING</code> state until the table deletion is complete.
* </p>
* </note>
* <p>
* When you delete a table, any indexes on that table are also deleted.
* </p>
* <p>
* If you have DynamoDB Streams enabled on the table, then the corresponding
* stream on that table goes into the <code>DISABLED</code> state, and the
* stream is automatically deleted after 24 hours.
* </p>
* <p>
* Use the <i>DescribeTable</i> API to check the status of the table.
* </p>
*
* @param deleteTableRequest <p>
* Represents the input of a <i>DeleteTable</i> operation.
* </p>
* @return A Java Future object containing the response from the DeleteTable
* service method, as returned by Amazon DynamoDB.
* @throws ResourceInUseException
* @throws ResourceNotFoundException
* @throws LimitExceededException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<DeleteTableResult> deleteTableAsync(final DeleteTableRequest deleteTableRequest,
final AsyncHandler<DeleteTableRequest, DeleteTableResult> asyncHandler)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<DeleteTableResult>() {
public DeleteTableResult call() throws Exception {
DeleteTableResult result = null;
try {
result = deleteTable(deleteTableRequest);
} catch (Exception ex) {
asyncHandler.onError(ex);
throw ex;
}
asyncHandler.onSuccess(deleteTableRequest, result);
return result;
}
});
}
/**
* <p>
* Returns the current provisioned-capacity limits for your AWS account in a
* region, both for the region as a whole and for any one DynamoDB table
* that you create there.
* </p>
* <p>
* When you establish an AWS account, the account has initial limits on the
* maximum read capacity units and write capacity units that you can
* provision across all of your DynamoDB tables in a given region. Also,
* there are per-table limits that apply when you create a table there. For
* more information, see <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Limits.html"
* >Limits</a> page in the <i>Amazon DynamoDB Developer Guide</i>.
* </p>
* <p>
* Although you can increase these limits by filing a case at <a
* href="https://console.aws.amazon.com/support/home#/">AWS Support
* Center</a>, obtaining the increase is not instantaneous. The
* <i>DescribeLimits</i> API lets you write code to compare the capacity you
* are currently using to those limits imposed by your account so that you
* have enough time to apply for an increase before you hit a limit.
* </p>
* <p>
* For example, you could use one of the AWS SDKs to do the following:
* </p>
* <ol>
* <li>
* <p>
* Call <i>DescribeLimits</i> for a particular region to obtain your current
* account limits on provisioned capacity there.
* </p>
* </li>
* <li>
* <p>
* Create a variable to hold the aggregate read capacity units provisioned
* for all your tables in that region, and one to hold the aggregate write
* capacity units. Zero them both.
* </p>
* </li>
* <li>
* <p>
* Call <i>ListTables</i> to obtain a list of all your DynamoDB tables.
* </p>
* </li>
* <li>
* <p>
* For each table name listed by <i>ListTables</i>, do the following:
* </p>
* <ul>
* <li>
* <p>
* Call <i>DescribeTable</i> with the table name.
* </p>
* </li>
* <li>
* <p>
* Use the data returned by <i>DescribeTable</i> to add the read capacity
* units and write capacity units provisioned for the table itself to your
* variables.
* </p>
* </li>
* <li>
* <p>
* If the table has one or more global secondary indexes (GSIs), loop over
* these GSIs and add their provisioned capacity values to your variables as
* well.
* </p>
* </li>
* </ul>
* </li>
* <li>
* <p>
* Report the account limits for that region returned by
* <i>DescribeLimits</i>, along with the total current provisioned capacity
* levels you have calculated.
* </p>
* </li>
* </ol>
* <p>
* This will let you see whether you are getting close to your account-level
* limits.
* </p>
* <p>
* The per-table limits apply only when you are creating a new table. They
* restrict the sum of the provisioned capacity of the new table itself and
* all its global secondary indexes.
* </p>
* <p>
* For existing tables and their GSIs, DynamoDB will not let you increase
* provisioned capacity extremely rapidly, but the only upper limit that
* applies is that the aggregate provisioned capacity over all your tables
* and GSIs cannot exceed either of the per-account limits.
* </p>
* <note>
* <p>
* <i>DescribeLimits</i> should only be called periodically. You can expect
* throttling errors if you call it more than once in a minute.
* </p>
* </note>
* <p>
* The <i>DescribeLimits</i> Request element has no content.
* </p>
*
* @param describeLimitsRequest <p>
* Represents the input of a <i>DescribeLimits</i> operation. Has
* no content.
* </p>
* @return A Java Future object containing the response from the
* DescribeLimits service method, as returned by Amazon DynamoDB.
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<DescribeLimitsResult> describeLimitsAsync(
final DescribeLimitsRequest describeLimitsRequest) throws AmazonServiceException,
AmazonClientException {
return executorService.submit(new Callable<DescribeLimitsResult>() {
public DescribeLimitsResult call() throws Exception {
return describeLimits(describeLimitsRequest);
}
});
}
/**
* <p>
* Returns the current provisioned-capacity limits for your AWS account in a
* region, both for the region as a whole and for any one DynamoDB table
* that you create there.
* </p>
* <p>
* When you establish an AWS account, the account has initial limits on the
* maximum read capacity units and write capacity units that you can
* provision across all of your DynamoDB tables in a given region. Also,
* there are per-table limits that apply when you create a table there. For
* more information, see <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Limits.html"
* >Limits</a> page in the <i>Amazon DynamoDB Developer Guide</i>.
* </p>
* <p>
* Although you can increase these limits by filing a case at <a
* href="https://console.aws.amazon.com/support/home#/">AWS Support
* Center</a>, obtaining the increase is not instantaneous. The
* <i>DescribeLimits</i> API lets you write code to compare the capacity you
* are currently using to those limits imposed by your account so that you
* have enough time to apply for an increase before you hit a limit.
* </p>
* <p>
* For example, you could use one of the AWS SDKs to do the following:
* </p>
* <ol>
* <li>
* <p>
* Call <i>DescribeLimits</i> for a particular region to obtain your current
* account limits on provisioned capacity there.
* </p>
* </li>
* <li>
* <p>
* Create a variable to hold the aggregate read capacity units provisioned
* for all your tables in that region, and one to hold the aggregate write
* capacity units. Zero them both.
* </p>
* </li>
* <li>
* <p>
* Call <i>ListTables</i> to obtain a list of all your DynamoDB tables.
* </p>
* </li>
* <li>
* <p>
* For each table name listed by <i>ListTables</i>, do the following:
* </p>
* <ul>
* <li>
* <p>
* Call <i>DescribeTable</i> with the table name.
* </p>
* </li>
* <li>
* <p>
* Use the data returned by <i>DescribeTable</i> to add the read capacity
* units and write capacity units provisioned for the table itself to your
* variables.
* </p>
* </li>
* <li>
* <p>
* If the table has one or more global secondary indexes (GSIs), loop over
* these GSIs and add their provisioned capacity values to your variables as
* well.
* </p>
* </li>
* </ul>
* </li>
* <li>
* <p>
* Report the account limits for that region returned by
* <i>DescribeLimits</i>, along with the total current provisioned capacity
* levels you have calculated.
* </p>
* </li>
* </ol>
* <p>
* This will let you see whether you are getting close to your account-level
* limits.
* </p>
* <p>
* The per-table limits apply only when you are creating a new table. They
* restrict the sum of the provisioned capacity of the new table itself and
* all its global secondary indexes.
* </p>
* <p>
* For existing tables and their GSIs, DynamoDB will not let you increase
* provisioned capacity extremely rapidly, but the only upper limit that
* applies is that the aggregate provisioned capacity over all your tables
* and GSIs cannot exceed either of the per-account limits.
* </p>
* <note>
* <p>
* <i>DescribeLimits</i> should only be called periodically. You can expect
* throttling errors if you call it more than once in a minute.
* </p>
* </note>
* <p>
* The <i>DescribeLimits</i> Request element has no content.
* </p>
*
* @param describeLimitsRequest <p>
* Represents the input of a <i>DescribeLimits</i> operation. Has
* no content.
* </p>
* @return A Java Future object containing the response from the
* DescribeLimits service method, as returned by Amazon DynamoDB.
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<DescribeLimitsResult> describeLimitsAsync(
final DescribeLimitsRequest describeLimitsRequest,
final AsyncHandler<DescribeLimitsRequest, DescribeLimitsResult> asyncHandler)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<DescribeLimitsResult>() {
public DescribeLimitsResult call() throws Exception {
DescribeLimitsResult result = null;
try {
result = describeLimits(describeLimitsRequest);
} catch (Exception ex) {
asyncHandler.onError(ex);
throw ex;
}
asyncHandler.onSuccess(describeLimitsRequest, result);
return result;
}
});
}
/**
* <p>
* Returns information about the table, including the current status of the
* table, when it was created, the primary key schema, and any indexes on
* the table.
* </p>
* <note>
* <p>
* If you issue a <i>DescribeTable</i> request immediately after a
* <i>CreateTable</i> request, DynamoDB might return a
* <i>ResourceNotFoundException</i>. This is because <i>DescribeTable</i>
* uses an eventually consistent query, and the metadata for your table
* might not be available at that moment. Wait for a few seconds, and then
* try the <i>DescribeTable</i> request again.
* </p>
* </note>
*
* @param describeTableRequest <p>
* Represents the input of a <i>DescribeTable</i> operation.
* </p>
* @return A Java Future object containing the response from the
* DescribeTable service method, as returned by Amazon DynamoDB.
* @throws ResourceNotFoundException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<DescribeTableResult> describeTableAsync(
final DescribeTableRequest describeTableRequest) throws AmazonServiceException,
AmazonClientException {
return executorService.submit(new Callable<DescribeTableResult>() {
public DescribeTableResult call() throws Exception {
return describeTable(describeTableRequest);
}
});
}
/**
* <p>
* Returns information about the table, including the current status of the
* table, when it was created, the primary key schema, and any indexes on
* the table.
* </p>
* <note>
* <p>
* If you issue a <i>DescribeTable</i> request immediately after a
* <i>CreateTable</i> request, DynamoDB might return a
* <i>ResourceNotFoundException</i>. This is because <i>DescribeTable</i>
* uses an eventually consistent query, and the metadata for your table
* might not be available at that moment. Wait for a few seconds, and then
* try the <i>DescribeTable</i> request again.
* </p>
* </note>
*
* @param describeTableRequest <p>
* Represents the input of a <i>DescribeTable</i> operation.
* </p>
* @return A Java Future object containing the response from the
* DescribeTable service method, as returned by Amazon DynamoDB.
* @throws ResourceNotFoundException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<DescribeTableResult> describeTableAsync(
final DescribeTableRequest describeTableRequest,
final AsyncHandler<DescribeTableRequest, DescribeTableResult> asyncHandler)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<DescribeTableResult>() {
public DescribeTableResult call() throws Exception {
DescribeTableResult result = null;
try {
result = describeTable(describeTableRequest);
} catch (Exception ex) {
asyncHandler.onError(ex);
throw ex;
}
asyncHandler.onSuccess(describeTableRequest, result);
return result;
}
});
}
/**
* <p>
* The <i>GetItem</i> operation returns a set of attributes for the item
* with the given primary key. If there is no matching item, <i>GetItem</i>
* does not return any data.
* </p>
* <p>
* <i>GetItem</i> provides an eventually consistent read by default. If your
* application requires a strongly consistent read, set
* <i>ConsistentRead</i> to <code>true</code>. Although a strongly
* consistent read might take more time than an eventually consistent read,
* it always returns the last updated value.
* </p>
*
* @param getItemRequest <p>
* Represents the input of a <i>GetItem</i> operation.
* </p>
* @return A Java Future object containing the response from the GetItem
* service method, as returned by Amazon DynamoDB.
* @throws ProvisionedThroughputExceededException
* @throws ResourceNotFoundException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<GetItemResult> getItemAsync(final GetItemRequest getItemRequest)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<GetItemResult>() {
public GetItemResult call() throws Exception {
return getItem(getItemRequest);
}
});
}
/**
* <p>
* The <i>GetItem</i> operation returns a set of attributes for the item
* with the given primary key. If there is no matching item, <i>GetItem</i>
* does not return any data.
* </p>
* <p>
* <i>GetItem</i> provides an eventually consistent read by default. If your
* application requires a strongly consistent read, set
* <i>ConsistentRead</i> to <code>true</code>. Although a strongly
* consistent read might take more time than an eventually consistent read,
* it always returns the last updated value.
* </p>
*
* @param getItemRequest <p>
* Represents the input of a <i>GetItem</i> operation.
* </p>
* @return A Java Future object containing the response from the GetItem
* service method, as returned by Amazon DynamoDB.
* @throws ProvisionedThroughputExceededException
* @throws ResourceNotFoundException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<GetItemResult> getItemAsync(final GetItemRequest getItemRequest,
final AsyncHandler<GetItemRequest, GetItemResult> asyncHandler)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<GetItemResult>() {
public GetItemResult call() throws Exception {
GetItemResult result = null;
try {
result = getItem(getItemRequest);
} catch (Exception ex) {
asyncHandler.onError(ex);
throw ex;
}
asyncHandler.onSuccess(getItemRequest, result);
return result;
}
});
}
/**
* <p>
* Returns an array of table names associated with the current account and
* endpoint. The output from <i>ListTables</i> is paginated, with each page
* returning a maximum of 100 table names.
* </p>
*
* @param listTablesRequest <p>
* Represents the input of a <i>ListTables</i> operation.
* </p>
* @return A Java Future object containing the response from the ListTables
* service method, as returned by Amazon DynamoDB.
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<ListTablesResult> listTablesAsync(final ListTablesRequest listTablesRequest)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<ListTablesResult>() {
public ListTablesResult call() throws Exception {
return listTables(listTablesRequest);
}
});
}
/**
* <p>
* Returns an array of table names associated with the current account and
* endpoint. The output from <i>ListTables</i> is paginated, with each page
* returning a maximum of 100 table names.
* </p>
*
* @param listTablesRequest <p>
* Represents the input of a <i>ListTables</i> operation.
* </p>
* @return A Java Future object containing the response from the ListTables
* service method, as returned by Amazon DynamoDB.
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<ListTablesResult> listTablesAsync(final ListTablesRequest listTablesRequest,
final AsyncHandler<ListTablesRequest, ListTablesResult> asyncHandler)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<ListTablesResult>() {
public ListTablesResult call() throws Exception {
ListTablesResult result = null;
try {
result = listTables(listTablesRequest);
} catch (Exception ex) {
asyncHandler.onError(ex);
throw ex;
}
asyncHandler.onSuccess(listTablesRequest, result);
return result;
}
});
}
/**
* <p>
* Creates a new item, or replaces an old item with a new item. If an item
* that has the same primary key as the new item already exists in the
* specified table, the new item completely replaces the existing item. You
* can perform a conditional put operation (add a new item if one with the
* specified primary key doesn't exist), or replace an existing item if it
* has certain attribute values.
* </p>
* <p>
* In addition to putting an item, you can also return the item's attribute
* values in the same operation, using the <i>ReturnValues</i> parameter.
* </p>
* <p>
* When you add an item, the primary key attribute(s) are the only required
* attributes. Attribute values cannot be null. String and Binary type
* attributes must have lengths greater than zero. Set type attributes
* cannot be empty. Requests with empty values will be rejected with a
* <i>ValidationException</i> exception.
* </p>
* <p>
* You can request that <i>PutItem</i> return either a copy of the original
* item (before the update) or a copy of the updated item (after the
* update). For more information, see the <i>ReturnValues</i> description
* below.
* </p>
* <note>
* <p>
* To prevent a new item from replacing an existing item, use a conditional
* expression that contains the <code>attribute_not_exists</code> function
* with the name of the attribute being used as the partition key for the
* table. Since every record must contain that attribute, the
* <code>attribute_not_exists</code> function will only succeed if no
* matching item exists.
* </p>
* </note>
* <p>
* For more information about using this API, see <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/WorkingWithItems.html"
* >Working with Items</a> in the <i>Amazon DynamoDB Developer Guide</i>.
* </p>
*
* @param putItemRequest <p>
* Represents the input of a <i>PutItem</i> operation.
* </p>
* @return A Java Future object containing the response from the PutItem
* service method, as returned by Amazon DynamoDB.
* @throws ConditionalCheckFailedException
* @throws ProvisionedThroughputExceededException
* @throws ResourceNotFoundException
* @throws ItemCollectionSizeLimitExceededException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<PutItemResult> putItemAsync(final PutItemRequest putItemRequest)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<PutItemResult>() {
public PutItemResult call() throws Exception {
return putItem(putItemRequest);
}
});
}
/**
* <p>
* Creates a new item, or replaces an old item with a new item. If an item
* that has the same primary key as the new item already exists in the
* specified table, the new item completely replaces the existing item. You
* can perform a conditional put operation (add a new item if one with the
* specified primary key doesn't exist), or replace an existing item if it
* has certain attribute values.
* </p>
* <p>
* In addition to putting an item, you can also return the item's attribute
* values in the same operation, using the <i>ReturnValues</i> parameter.
* </p>
* <p>
* When you add an item, the primary key attribute(s) are the only required
* attributes. Attribute values cannot be null. String and Binary type
* attributes must have lengths greater than zero. Set type attributes
* cannot be empty. Requests with empty values will be rejected with a
* <i>ValidationException</i> exception.
* </p>
* <p>
* You can request that <i>PutItem</i> return either a copy of the original
* item (before the update) or a copy of the updated item (after the
* update). For more information, see the <i>ReturnValues</i> description
* below.
* </p>
* <note>
* <p>
* To prevent a new item from replacing an existing item, use a conditional
* expression that contains the <code>attribute_not_exists</code> function
* with the name of the attribute being used as the partition key for the
* table. Since every record must contain that attribute, the
* <code>attribute_not_exists</code> function will only succeed if no
* matching item exists.
* </p>
* </note>
* <p>
* For more information about using this API, see <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/WorkingWithItems.html"
* >Working with Items</a> in the <i>Amazon DynamoDB Developer Guide</i>.
* </p>
*
* @param putItemRequest <p>
* Represents the input of a <i>PutItem</i> operation.
* </p>
* @return A Java Future object containing the response from the PutItem
* service method, as returned by Amazon DynamoDB.
* @throws ConditionalCheckFailedException
* @throws ProvisionedThroughputExceededException
* @throws ResourceNotFoundException
* @throws ItemCollectionSizeLimitExceededException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<PutItemResult> putItemAsync(final PutItemRequest putItemRequest,
final AsyncHandler<PutItemRequest, PutItemResult> asyncHandler)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<PutItemResult>() {
public PutItemResult call() throws Exception {
PutItemResult result = null;
try {
result = putItem(putItemRequest);
} catch (Exception ex) {
asyncHandler.onError(ex);
throw ex;
}
asyncHandler.onSuccess(putItemRequest, result);
return result;
}
});
}
/**
* <p>
* A <i>Query</i> operation uses the primary key of a table or a secondary
* index to directly access items from that table or index.
* </p>
* <p>
* Use the <i>KeyConditionExpression</i> parameter to provide a specific
* value for the partition key. The <i>Query</i> operation will return all
* of the items from the table or index with that partition key value. You
* can optionally narrow the scope of the <i>Query</i> operation by
* specifying a sort key value and a comparison operator in
* <i>KeyConditionExpression</i>. You can use the <i>ScanIndexForward</i>
* parameter to get results in forward or reverse order, by sort key.
* </p>
* <p>
* Queries that do not return results consume the minimum number of read
* capacity units for that type of read operation.
* </p>
* <p>
* If the total number of items meeting the query criteria exceeds the
* result set size limit of 1 MB, the query stops and results are returned
* to the user with the <i>LastEvaluatedKey</i> element to continue the
* query in a subsequent operation. Unlike a <i>Scan</i> operation, a
* <i>Query</i> operation never returns both an empty result set and a
* <i>LastEvaluatedKey</i> value. <i>LastEvaluatedKey</i> is only provided
* if you have used the <i>Limit</i> parameter, or if the result set exceeds
* 1 MB (prior to applying a filter).
* </p>
* <p>
* You can query a table, a local secondary index, or a global secondary
* index. For a query on a table or on a local secondary index, you can set
* the <i>ConsistentRead</i> parameter to <code>true</code> and obtain a
* strongly consistent result. Global secondary indexes support eventually
* consistent reads only, so do not specify <i>ConsistentRead</i> when
* querying a global secondary index.
* </p>
*
* @param queryRequest <p>
* Represents the input of a <i>Query</i> operation.
* </p>
* @return A Java Future object containing the response from the Query
* service method, as returned by Amazon DynamoDB.
* @throws ProvisionedThroughputExceededException
* @throws ResourceNotFoundException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<QueryResult> queryAsync(final QueryRequest queryRequest)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<QueryResult>() {
public QueryResult call() throws Exception {
return query(queryRequest);
}
});
}
/**
* <p>
* A <i>Query</i> operation uses the primary key of a table or a secondary
* index to directly access items from that table or index.
* </p>
* <p>
* Use the <i>KeyConditionExpression</i> parameter to provide a specific
* value for the partition key. The <i>Query</i> operation will return all
* of the items from the table or index with that partition key value. You
* can optionally narrow the scope of the <i>Query</i> operation by
* specifying a sort key value and a comparison operator in
* <i>KeyConditionExpression</i>. You can use the <i>ScanIndexForward</i>
* parameter to get results in forward or reverse order, by sort key.
* </p>
* <p>
* Queries that do not return results consume the minimum number of read
* capacity units for that type of read operation.
* </p>
* <p>
* If the total number of items meeting the query criteria exceeds the
* result set size limit of 1 MB, the query stops and results are returned
* to the user with the <i>LastEvaluatedKey</i> element to continue the
* query in a subsequent operation. Unlike a <i>Scan</i> operation, a
* <i>Query</i> operation never returns both an empty result set and a
* <i>LastEvaluatedKey</i> value. <i>LastEvaluatedKey</i> is only provided
* if you have used the <i>Limit</i> parameter, or if the result set exceeds
* 1 MB (prior to applying a filter).
* </p>
* <p>
* You can query a table, a local secondary index, or a global secondary
* index. For a query on a table or on a local secondary index, you can set
* the <i>ConsistentRead</i> parameter to <code>true</code> and obtain a
* strongly consistent result. Global secondary indexes support eventually
* consistent reads only, so do not specify <i>ConsistentRead</i> when
* querying a global secondary index.
* </p>
*
* @param queryRequest <p>
* Represents the input of a <i>Query</i> operation.
* </p>
* @return A Java Future object containing the response from the Query
* service method, as returned by Amazon DynamoDB.
* @throws ProvisionedThroughputExceededException
* @throws ResourceNotFoundException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<QueryResult> queryAsync(final QueryRequest queryRequest,
final AsyncHandler<QueryRequest, QueryResult> asyncHandler)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<QueryResult>() {
public QueryResult call() throws Exception {
QueryResult result = null;
try {
result = query(queryRequest);
} catch (Exception ex) {
asyncHandler.onError(ex);
throw ex;
}
asyncHandler.onSuccess(queryRequest, result);
return result;
}
});
}
/**
* <p>
* The <i>Scan</i> operation returns one or more items and item attributes
* by accessing every item in a table or a secondary index. To have DynamoDB
* return fewer items, you can provide a <i>ScanFilter</i> operation.
* </p>
* <p>
* If the total number of scanned items exceeds the maximum data set size
* limit of 1 MB, the scan stops and results are returned to the user as a
* <i>LastEvaluatedKey</i> value to continue the scan in a subsequent
* operation. The results also include the number of items exceeding the
* limit. A scan can result in no table data meeting the filter criteria.
* </p>
* <p>
* By default, <i>Scan</i> operations proceed sequentially; however, for
* faster performance on a large table or secondary index, applications can
* request a parallel <i>Scan</i> operation by providing the <i>Segment</i>
* and <i>TotalSegments</i> parameters. For more information, see <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/QueryAndScan.html#QueryAndScanParallelScan"
* >Parallel Scan</a> in the <i>Amazon DynamoDB Developer Guide</i>.
* </p>
* <p>
* By default, <i>Scan</i> uses eventually consistent reads when accessing
* the data in a table; therefore, the result set might not include the
* changes to data in the table immediately before the operation began. If
* you need a consistent copy of the data, as of the time that the Scan
* begins, you can set the <i>ConsistentRead</i> parameter to <i>true</i>.
* </p>
*
* @param scanRequest <p>
* Represents the input of a <i>Scan</i> operation.
* </p>
* @return A Java Future object containing the response from the Scan
* service method, as returned by Amazon DynamoDB.
* @throws ProvisionedThroughputExceededException
* @throws ResourceNotFoundException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<ScanResult> scanAsync(final ScanRequest scanRequest)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<ScanResult>() {
public ScanResult call() throws Exception {
return scan(scanRequest);
}
});
}
/**
* <p>
* The <i>Scan</i> operation returns one or more items and item attributes
* by accessing every item in a table or a secondary index. To have DynamoDB
* return fewer items, you can provide a <i>ScanFilter</i> operation.
* </p>
* <p>
* If the total number of scanned items exceeds the maximum data set size
* limit of 1 MB, the scan stops and results are returned to the user as a
* <i>LastEvaluatedKey</i> value to continue the scan in a subsequent
* operation. The results also include the number of items exceeding the
* limit. A scan can result in no table data meeting the filter criteria.
* </p>
* <p>
* By default, <i>Scan</i> operations proceed sequentially; however, for
* faster performance on a large table or secondary index, applications can
* request a parallel <i>Scan</i> operation by providing the <i>Segment</i>
* and <i>TotalSegments</i> parameters. For more information, see <a href=
* "http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/QueryAndScan.html#QueryAndScanParallelScan"
* >Parallel Scan</a> in the <i>Amazon DynamoDB Developer Guide</i>.
* </p>
* <p>
* By default, <i>Scan</i> uses eventually consistent reads when accessing
* the data in a table; therefore, the result set might not include the
* changes to data in the table immediately before the operation began. If
* you need a consistent copy of the data, as of the time that the Scan
* begins, you can set the <i>ConsistentRead</i> parameter to <i>true</i>.
* </p>
*
* @param scanRequest <p>
* Represents the input of a <i>Scan</i> operation.
* </p>
* @return A Java Future object containing the response from the Scan
* service method, as returned by Amazon DynamoDB.
* @throws ProvisionedThroughputExceededException
* @throws ResourceNotFoundException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<ScanResult> scanAsync(final ScanRequest scanRequest,
final AsyncHandler<ScanRequest, ScanResult> asyncHandler)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<ScanResult>() {
public ScanResult call() throws Exception {
ScanResult result = null;
try {
result = scan(scanRequest);
} catch (Exception ex) {
asyncHandler.onError(ex);
throw ex;
}
asyncHandler.onSuccess(scanRequest, result);
return result;
}
});
}
/**
* <p>
* Edits an existing item's attributes, or adds a new item to the table if
* it does not already exist. You can put, delete, or add attribute values.
* You can also perform a conditional update on an existing item (insert a
* new attribute name-value pair if it doesn't exist, or replace an existing
* name-value pair if it has certain expected attribute values).
* </p>
* <p>
* You can also return the item's attribute values in the same
* <i>UpdateItem</i> operation using the <i>ReturnValues</i> parameter.
* </p>
*
* @param updateItemRequest <p>
* Represents the input of an <i>UpdateItem</i> operation.
* </p>
* @return A Java Future object containing the response from the UpdateItem
* service method, as returned by Amazon DynamoDB.
* @throws ConditionalCheckFailedException
* @throws ProvisionedThroughputExceededException
* @throws ResourceNotFoundException
* @throws ItemCollectionSizeLimitExceededException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<UpdateItemResult> updateItemAsync(final UpdateItemRequest updateItemRequest)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<UpdateItemResult>() {
public UpdateItemResult call() throws Exception {
return updateItem(updateItemRequest);
}
});
}
/**
* <p>
* Edits an existing item's attributes, or adds a new item to the table if
* it does not already exist. You can put, delete, or add attribute values.
* You can also perform a conditional update on an existing item (insert a
* new attribute name-value pair if it doesn't exist, or replace an existing
* name-value pair if it has certain expected attribute values).
* </p>
* <p>
* You can also return the item's attribute values in the same
* <i>UpdateItem</i> operation using the <i>ReturnValues</i> parameter.
* </p>
*
* @param updateItemRequest <p>
* Represents the input of an <i>UpdateItem</i> operation.
* </p>
* @return A Java Future object containing the response from the UpdateItem
* service method, as returned by Amazon DynamoDB.
* @throws ConditionalCheckFailedException
* @throws ProvisionedThroughputExceededException
* @throws ResourceNotFoundException
* @throws ItemCollectionSizeLimitExceededException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<UpdateItemResult> updateItemAsync(final UpdateItemRequest updateItemRequest,
final AsyncHandler<UpdateItemRequest, UpdateItemResult> asyncHandler)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<UpdateItemResult>() {
public UpdateItemResult call() throws Exception {
UpdateItemResult result = null;
try {
result = updateItem(updateItemRequest);
} catch (Exception ex) {
asyncHandler.onError(ex);
throw ex;
}
asyncHandler.onSuccess(updateItemRequest, result);
return result;
}
});
}
/**
* <p>
* Modifies the provisioned throughput settings, global secondary indexes,
* or DynamoDB Streams settings for a given table.
* </p>
* <p>
* You can only perform one of the following operations at once:
* </p>
* <ul>
* <li>
* <p>
* Modify the provisioned throughput settings of the table.
* </p>
* </li>
* <li>
* <p>
* Enable or disable Streams on the table.
* </p>
* </li>
* <li>
* <p>
* Remove a global secondary index from the table.
* </p>
* </li>
* <li>
* <p>
* Create a new global secondary index on the table. Once the index begins
* backfilling, you can use <i>UpdateTable</i> to perform other operations.
* </p>
* </li>
* </ul>
* <p>
* <i>UpdateTable</i> is an asynchronous operation; while it is executing,
* the table status changes from <code>ACTIVE</code> to
* <code>UPDATING</code>. While it is <code>UPDATING</code>, you cannot
* issue another <i>UpdateTable</i> request. When the table returns to the
* <code>ACTIVE</code> state, the <i>UpdateTable</i> operation is complete.
* </p>
*
* @param updateTableRequest <p>
* Represents the input of an <i>UpdateTable</i> operation.
* </p>
* @return A Java Future object containing the response from the UpdateTable
* service method, as returned by Amazon DynamoDB.
* @throws ResourceInUseException
* @throws ResourceNotFoundException
* @throws LimitExceededException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<UpdateTableResult> updateTableAsync(final UpdateTableRequest updateTableRequest)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<UpdateTableResult>() {
public UpdateTableResult call() throws Exception {
return updateTable(updateTableRequest);
}
});
}
/**
* <p>
* Modifies the provisioned throughput settings, global secondary indexes,
* or DynamoDB Streams settings for a given table.
* </p>
* <p>
* You can only perform one of the following operations at once:
* </p>
* <ul>
* <li>
* <p>
* Modify the provisioned throughput settings of the table.
* </p>
* </li>
* <li>
* <p>
* Enable or disable Streams on the table.
* </p>
* </li>
* <li>
* <p>
* Remove a global secondary index from the table.
* </p>
* </li>
* <li>
* <p>
* Create a new global secondary index on the table. Once the index begins
* backfilling, you can use <i>UpdateTable</i> to perform other operations.
* </p>
* </li>
* </ul>
* <p>
* <i>UpdateTable</i> is an asynchronous operation; while it is executing,
* the table status changes from <code>ACTIVE</code> to
* <code>UPDATING</code>. While it is <code>UPDATING</code>, you cannot
* issue another <i>UpdateTable</i> request. When the table returns to the
* <code>ACTIVE</code> state, the <i>UpdateTable</i> operation is complete.
* </p>
*
* @param updateTableRequest <p>
* Represents the input of an <i>UpdateTable</i> operation.
* </p>
* @return A Java Future object containing the response from the UpdateTable
* service method, as returned by Amazon DynamoDB.
* @throws ResourceInUseException
* @throws ResourceNotFoundException
* @throws LimitExceededException
* @throws InternalServerErrorException
* @throws AmazonClientException If any internal errors are encountered
* inside the client while attempting to make the request or
* handle the response. For example if a network connection is
* not available.
* @throws AmazonServiceException If an error response is returned by Amazon
* DynamoDB indicating either a problem with the data in the
* request, or a server side issue.
*/
public Future<UpdateTableResult> updateTableAsync(final UpdateTableRequest updateTableRequest,
final AsyncHandler<UpdateTableRequest, UpdateTableResult> asyncHandler)
throws AmazonServiceException, AmazonClientException {
return executorService.submit(new Callable<UpdateTableResult>() {
public UpdateTableResult call() throws Exception {
UpdateTableResult result = null;
try {
result = updateTable(updateTableRequest);
} catch (Exception ex) {
asyncHandler.onError(ex);
throw ex;
}
asyncHandler.onSuccess(updateTableRequest, result);
return result;
}
});
}
}