/*
* Copyright 2010 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.s3.transfer;
import java.io.File;
import java.io.InputStream;
import java.util.Date;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadPoolExecutor;
import com.amazonaws.AmazonClientException;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.internal.Mimetypes;
import com.amazonaws.services.s3.model.AbortMultipartUploadRequest;
import com.amazonaws.services.s3.model.ListMultipartUploadsRequest;
import com.amazonaws.services.s3.model.MultipartUpload;
import com.amazonaws.services.s3.model.MultipartUploadListing;
import com.amazonaws.services.s3.model.ObjectMetadata;
import com.amazonaws.services.s3.model.PutObjectRequest;
import com.amazonaws.services.s3.transfer.internal.MultipartUploadCallable;
import com.amazonaws.services.s3.transfer.internal.ProgressListenerChain;
import com.amazonaws.services.s3.transfer.internal.PutObjectCallable;
import com.amazonaws.services.s3.transfer.internal.TransferManagerUtils;
import com.amazonaws.services.s3.transfer.internal.TransferProgressImpl;
import com.amazonaws.services.s3.transfer.internal.TransferProgressUpdatingListener;
import com.amazonaws.services.s3.transfer.internal.TransferStateUpdatingCallable;
import com.amazonaws.services.s3.transfer.internal.UploadImpl;
import com.amazonaws.services.s3.transfer.model.UploadResult;
/**
* High level utility for managing transfers to Amazon S3.
* <p>
* <code>TransferManager</code> provides a simple API for uploading content to
* Amazon S3, and makes extensive use of Amazon S3 multipart uploads to achieve
* enhanced throughput, performance and reliability.
* <p>
* When possible, <code>TransferManager</code> attempts to use multiple threads
* to upload multiple parts of a single upload at once. When dealing with large
* content sizes and high bandwidth, this can have a significant increase on
* throughput.
* <p>
* <code>TransferManager</code> is responsible for managing resources such as
* connections and threads; share a single instance of
* <code>TransferManager</code> whenever possible. <code>TransferManager</code>,
* like all the client classes in the AWS SDK for Java, is thread safe.
* <p>
* Using <code>TransferManager</code> to upload data to Amazon S3 is easy:
*
* <pre>
* AWSCredentials myCredentials = new BasicAWSCredentials(...);
* TransferManager tx = new TransferManager(myCredentials);
* Upload myUpload = tx.upload(myBucket, myFile.getName(), myFile);
*
* while (myUpload.isDone() == false) {
* System.out.println("Transfer: " + myUpload.getDescription());
* System.out.println(" - State: " + myUpload.getState());
* System.out.println(" - Progress: " + myUpload.getProgress().getBytesTransfered());
* // Do work while we wait for our upload to complete...
* Thread.sleep(500);
* }
* </pre>
* <p>
* Note: Transfers are stored in memory. If the JVM is restarted, previous
* transfers are no longer accessible. If needed, clean up any multipart uploads
* that are incomplete.
*/
public class TransferManager {
/** The low level client we use to make the actual calls to Amazon S3. */
private AmazonS3 s3;
/** Configuration for how TransferManager processes requests. */
private TransferManagerConfiguration configuration;
/** The thread pool in which transfers are uploaded or downloaded. */
private ThreadPoolExecutor threadPool;
/** The thread pool in which progress listeners are notified of events. */
private ExecutorService notificationThreadPool;
/**
* Constructs a new <code>TransferManager</code> and Amazon S3 client using
* the specified AWS security credentials.
* <p>
* <code>TransferManager</code> and client objects
* may pool connections and threads.
* Reuse <code>TransferManager</code> and client objects
* and share them throughout applications.
* <p>
* TransferManager and all AWS client objects are thread safe.
*
* @param credentials
* The AWS security credentials to use when making authenticated
* requests.
*/
public TransferManager(AWSCredentials credentials) {
this(new AmazonS3Client(credentials));
}
/**
* Constructs a new <code>TransferManager</code>,
* specifying the client to use when making
* requests to Amazon S3.
* <p>
* <code>TransferManager</code> and client objects
* may pool connections and threads.
* Reuse <code>TransferManager</code> and client objects
* and share them throughout applications.
* <p>
* TransferManager and all AWS client objects are thread safe.
* </p>
*
* @param s3
* The client to use when making requests to Amazon S3.
*/
public TransferManager(AmazonS3 s3) {
this(s3, TransferManagerUtils.createDefaultExecutorService());
}
/**
* Constructs a new <code>TransferManager</code>
* specifying the client and thread pool to use when making
* requests to Amazon S3.
* <p>
* <code>TransferManager</code> and client objects
* may pool connections and threads.
* Reuse <code>TransferManager</code> and client objects
* and share them throughout applications.
* <p>
* TransferManager and all AWS client objects are thread safe.
*
* @param s3
* The client to use when making requests to Amazon S3.
* @param threadPool
* The thread pool in which to execute requests.
*/
public TransferManager(AmazonS3 s3, ThreadPoolExecutor threadPool) {
this.s3 = s3;
this.threadPool = threadPool;
this.configuration = new TransferManagerConfiguration();
this.notificationThreadPool = Executors.newFixedThreadPool(1);
}
/**
* Sets the configuration which specifies how
* this <code>TransferManager</code> processes requests.
*
* @param configuration
* The new configuration specifying how
* this <code>TransferManager</code>
* processes requests.
*/
public void setConfiguration(TransferManagerConfiguration configuration) {
this.configuration = configuration;
}
/**
* Returns the configuration which specifies how
* this <code>TransferManager</code> processes requests.
*
* @return The configuration settings for this <code>TransferManager</code>.
*/
public TransferManagerConfiguration getConfiguration() {
return configuration;
}
/**
* Returns the underlying Amazon S3 client used to make requests to
* Amazon S3.
*
* @return The underlying Amazon S3 client used to make requests to
* Amazon S3.
*/
public AmazonS3 getAmazonS3Client() {
return s3;
}
/**
* <p>
* Schedules a new transfer to upload data to Amazon S3. This method is
* non-blocking and returns immediately (i.e. before the upload has
* finished).
* </p>
* <p>
* When uploading data from a stream, callers <b>must</b> supply the size of
* data in the stream through the content length field in the
* <code>ObjectMetadata</code> parameter.
* If no content length is specified for the input
* stream, then TransferManager will attempt to buffer all the stream
* contents in memory and upload the data as a traditional, single part
* upload. Because the entire stream contents must be buffered in memory,
* this can be very expensive, and should be avoided whenever possible.
* </p>
* <p>
* Use the returned <code>Upload<code> object to query the progress of the
* transfer, add listeners for progress events, and wait for the upload to
* complete.
* </p>
* <p>
* If resources are available, the upload will begin immediately.
* Otherwise, the upload is scheduled and started as soon as
* resources become available.
* </p>
*
* @param bucketName
* The name of the bucket to upload the new object to.
* @param key
* The key in the specified bucket by which to store the new
* object.
* @param input
* The input stream containing the data to upload to Amazon S3.
* @param objectMetadata
* Additional information about the object being uploaded,
* including the size of the data, content type, additional
* custom user metadata, etc.
*
* @return A new <code>Upload<code> object to use to check
* the state of the upload, listen for progress notifications,
* and otherwise manage the upload.
*
* @throws AmazonClientException
* If any errors are encountered in the client while making the
* request or handling the response.
* @throws AmazonServiceException
* If any errors occurred in Amazon S3 while processing the
* request.
*/
public Upload upload(final String bucketName, final String key, final InputStream input, ObjectMetadata objectMetadata)
throws AmazonServiceException, AmazonClientException {
return upload(new PutObjectRequest(bucketName, key, input, objectMetadata));
}
/**
* <p>
* Schedules a new transfer to upload data to Amazon S3. This method is
* non-blocking and returns immediately (i.e. before the upload has
* finished).
* </p>
* <p>
* Use the returned <code>Upload<code> object to query the progress of the
* transfer, add listeners for progress events, and wait for the upload to
* complete.
* </p>
* <p>
* If resources are available, the upload will begin immediately.
* Otherwise, the upload is scheduled and started as soon as
* resources become available.
* </p>
*
* @param putObjectRequest
* The request containing all the parameters for the upload.
*
* @return A new <code>Upload<code> object to use to check
* the state of the upload, listen for progress notifications,
* and otherwise manage the upload.
*
* @throws AmazonClientException
* If any errors are encountered in the client while making the
* request or handling the response.
* @throws AmazonServiceException
* If any errors occurred in Amazon S3 while processing the
* request.
*/
public Upload upload(final PutObjectRequest putObjectRequest)
throws AmazonServiceException, AmazonClientException {
if (putObjectRequest.getMetadata() == null)
putObjectRequest.setMetadata(new ObjectMetadata());
ObjectMetadata metadata = putObjectRequest.getMetadata();
if (TransferManagerUtils.getRequestFile(putObjectRequest) != null) {
File file = TransferManagerUtils.getRequestFile(putObjectRequest);
// Always set the content length, even if it's already set
metadata.setContentLength(file.length());
// Only set the content type if it hasn't already been set
if (metadata.getContentType() == null) {
metadata.setContentType(Mimetypes.getInstance().getMimetype(file));
}
}
String description = "Uploading to " + putObjectRequest.getBucketName() + "/" + putObjectRequest.getKey();
TransferProgressImpl transferProgress = new TransferProgressImpl();
transferProgress.setTotalBytesToTransfer(TransferManagerUtils.getContentLength(putObjectRequest));
ProgressListenerChain listenerChain = new ProgressListenerChain(
notificationThreadPool,
new TransferProgressUpdatingListener(transferProgress),
putObjectRequest.getProgressListener());
putObjectRequest.setProgressListener(listenerChain);
UploadImpl upload = new UploadImpl(description, transferProgress, listenerChain);
Callable<UploadResult> callable = null;
if (TransferManagerUtils.shouldUseMultipartUpload(putObjectRequest, configuration)) {
callable = new MultipartUploadCallable(this, threadPool, putObjectRequest, listenerChain);
} else {
callable = new PutObjectCallable(s3, putObjectRequest);
}
callable = new TransferStateUpdatingCallable(callable, upload);
upload.setFuture(threadPool.submit(callable));
return upload;
}
/**
* <p>
* Aborts any multipart uploads that were initiated before the specified date.
* </p>
* <p>
* This method is useful for cleaning up any interrupted multipart uploads.
* <code>TransferManager</code> attempts to abort any failed uploads,
* but in some cases this may not be possible, such as if network connectivity
* is completely lost.
* </p>
*
* @param bucketName
* The name of the bucket containing the multipart uploads to
* abort.
* @param date
* The date indicating which multipart uploads should be aborted.
*/
public void abortMultipartUploads(String bucketName, Date date)
throws AmazonServiceException, AmazonClientException {
MultipartUploadListing uploadListing = s3.listMultipartUploads(new ListMultipartUploadsRequest(bucketName));
do {
for (MultipartUpload upload : uploadListing.getMultipartUploads()) {
if (upload.getInitiated().compareTo(date) < 0) {
s3.abortMultipartUpload(new AbortMultipartUploadRequest(
bucketName, upload.getKey(), upload.getUploadId()));
}
}
ListMultipartUploadsRequest request = new ListMultipartUploadsRequest(bucketName)
.withUploadIdMarker(uploadListing.getNextUploadIdMarker())
.withKeyMarker(uploadListing.getNextKeyMarker());
uploadListing = s3.listMultipartUploads(request);
} while (uploadListing.isTruncated());
}
/**
* Forcefully shuts down this TransferManager instance - currently executing
* transfers will not be allowed to finish. Callers should use this method
* when they either:
* <ul>
* <li>have already verified that their transfers have completed by checking
* each transfer's state
* <li>need to exit quickly and don't mind stopping transfers before they
* complete.
* </ul>
* <p>
* Callers should also remember that uploaded parts from an interrupted
* upload may not always be automatically cleaned up, but callers can use
* {@link #abortMultipartUploads(String, Date)} to clean up any upload
* parts.
*/
public void shutdownNow() {
threadPool.shutdownNow();
notificationThreadPool.shutdownNow();
if (s3 instanceof AmazonS3Client) {
((AmazonS3Client)s3).shutdown();
}
}
}