/*
* 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.
*/
import java.util.ArrayList;
import java.util.List;
import com.amazonaws.AmazonClientException;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.regions.Region;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.ec2.AmazonEC2;
import com.amazonaws.services.ec2.AmazonEC2Client;
import com.amazonaws.services.ec2.model.CancelSpotInstanceRequestsRequest;
import com.amazonaws.services.ec2.model.DescribeSpotInstanceRequestsRequest;
import com.amazonaws.services.ec2.model.DescribeSpotInstanceRequestsResult;
import com.amazonaws.services.ec2.model.LaunchSpecification;
import com.amazonaws.services.ec2.model.RequestSpotInstancesRequest;
import com.amazonaws.services.ec2.model.RequestSpotInstancesResult;
import com.amazonaws.services.ec2.model.SpotInstanceRequest;
import com.amazonaws.services.ec2.model.TerminateInstancesRequest;
/**
* Welcome to your new AWS Java SDK based project!
*
* This class is meant as a starting point for your console-based application that
* makes one or more calls to the AWS services supported by the Java SDK, such as EC2,
* SimpleDB, and S3.
*
* In order to use the services in this sample, you need:
*
* - A valid Amazon Web Services account. You can register for AWS at:
* https://aws-portal.amazon.com/gp/aws/developer/registration/index.html
*
* - Your account's Access Key ID and Secret Access Key:
* http://aws.amazon.com/security-credentials
*
* - A subscription to Amazon EC2. You can sign up for EC2 at:
* http://aws.amazon.com/ec2/
*
*/
public class InlineGettingStartedCodeSampleApp {
/*
* Before running the code:
* Fill in your AWS access credentials in the provided credentials
* file template, and be sure to move the file to the default location
* (~/.aws/credentials) where the sample code will load the
* credentials from.
* https://console.aws.amazon.com/iam/home?#security_credential
*
* WARNING:
* To avoid accidental leakage of your credentials, DO NOT keep
* the credentials file in your source directory.
*/
public static void main(String[] args) {
//============================================================================================//
//=============================== Submitting a Request =======================================//
//============================================================================================//
/*
* The ProfileCredentialsProvider will return your [default]
* credential profile by reading from the credentials file located at
* (~/.aws/credentials).
*/
AWSCredentials credentials = null;
try {
credentials = new ProfileCredentialsProvider().getCredentials();
} catch (Exception e) {
throw new AmazonClientException(
"Cannot load the credentials from the credential profiles file. " +
"Please make sure that your credentials file is at the correct " +
"location (~/.aws/credentials), and is in valid format.",
e);
}
// Create the AmazonEC2Client object so we can call various APIs.
AmazonEC2 ec2 = new AmazonEC2Client(credentials);
Region usWest2 = Region.getRegion(Regions.US_WEST_2);
ec2.setRegion(usWest2);
// Initializes a Spot Instance Request
RequestSpotInstancesRequest requestRequest = new RequestSpotInstancesRequest();
// Request 1 x t1.micro instance with a bid price of $0.03.
requestRequest.setSpotPrice("0.03");
requestRequest.setInstanceCount(Integer.valueOf(1));
// Setup the specifications of the launch. This includes the instance type (e.g. t1.micro)
// and the latest Amazon Linux AMI id available. Note, you should always use the latest
// Amazon Linux AMI id or another of your choosing.
LaunchSpecification launchSpecification = new LaunchSpecification();
launchSpecification.setImageId("ami-8c1fece5");
launchSpecification.setInstanceType("t1.micro");
// Add the security group to the request.
ArrayList<String> securityGroups = new ArrayList<String>();
securityGroups.add("GettingStartedGroup");
launchSpecification.setSecurityGroups(securityGroups);
// Add the launch specifications to the request.
requestRequest.setLaunchSpecification(launchSpecification);
//============================================================================================//
//=========================== Getting the Request ID from the Request ========================//
//============================================================================================//
// Call the RequestSpotInstance API.
RequestSpotInstancesResult requestResult = ec2.requestSpotInstances(requestRequest);
List<SpotInstanceRequest> requestResponses = requestResult.getSpotInstanceRequests();
// Setup an arraylist to collect all of the request ids we want to watch hit the running
// state.
ArrayList<String> spotInstanceRequestIds = new ArrayList<String>();
// Add all of the request ids to the hashset, so we can determine when they hit the
// active state.
for (SpotInstanceRequest requestResponse : requestResponses) {
System.out.println("Created Spot Request: "+requestResponse.getSpotInstanceRequestId());
spotInstanceRequestIds.add(requestResponse.getSpotInstanceRequestId());
}
//============================================================================================//
//=========================== Determining the State of the Spot Request ======================//
//============================================================================================//
// Create a variable that will track whether there are any requests still in the open state.
boolean anyOpen;
// Initialize variables.
ArrayList<String> instanceIds = new ArrayList<String>();
do {
// Create the describeRequest with tall of the request id to monitor (e.g. that we started).
DescribeSpotInstanceRequestsRequest describeRequest = new DescribeSpotInstanceRequestsRequest();
describeRequest.setSpotInstanceRequestIds(spotInstanceRequestIds);
// Initialize the anyOpen variable to false, which assumes there are no requests open unless
// we find one that is still open.
anyOpen=false;
try {
// Retrieve all of the requests we want to monitor.
DescribeSpotInstanceRequestsResult describeResult = ec2.describeSpotInstanceRequests(describeRequest);
List<SpotInstanceRequest> describeResponses = describeResult.getSpotInstanceRequests();
// Look through each request and determine if they are all in the active state.
for (SpotInstanceRequest describeResponse : describeResponses) {
// If the state is open, it hasn't changed since we attempted to request it.
// There is the potential for it to transition almost immediately to closed or
// cancelled so we compare against open instead of active.
if (describeResponse.getState().equals("open")) {
anyOpen = true;
break;
}
// Add the instance id to the list we will eventually terminate.
instanceIds.add(describeResponse.getInstanceId());
}
} catch (AmazonServiceException e) {
// If we have an exception, ensure we don't break out of the loop.
// This prevents the scenario where there was blip on the wire.
anyOpen = true;
}
try {
// Sleep for 60 seconds.
Thread.sleep(60*1000);
} catch (Exception e) {
// Do nothing because it woke up early.
}
} while (anyOpen);
//============================================================================================//
//====================================== Canceling the Request ==============================//
//============================================================================================//
try {
// Cancel requests.
CancelSpotInstanceRequestsRequest cancelRequest = new CancelSpotInstanceRequestsRequest(spotInstanceRequestIds);
ec2.cancelSpotInstanceRequests(cancelRequest);
} catch (AmazonServiceException e) {
// Write out any exceptions that may have occurred.
System.out.println("Error cancelling instances");
System.out.println("Caught Exception: " + e.getMessage());
System.out.println("Reponse Status Code: " + e.getStatusCode());
System.out.println("Error Code: " + e.getErrorCode());
System.out.println("Request ID: " + e.getRequestId());
}
//============================================================================================//
//=================================== Terminating any Instances ==============================//
//============================================================================================//
try {
// Terminate instances.
TerminateInstancesRequest terminateRequest = new TerminateInstancesRequest(instanceIds);
ec2.terminateInstances(terminateRequest);
} catch (AmazonServiceException e) {
// Write out any exceptions that may have occurred.
System.out.println("Error terminating instances");
System.out.println("Caught Exception: " + e.getMessage());
System.out.println("Reponse Status Code: " + e.getStatusCode());
System.out.println("Error Code: " + e.getErrorCode());
System.out.println("Request ID: " + e.getRequestId());
}
}
}