Java tutorial
/* * Copyright 2010-2012 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 getting_started; import java.io.IOException; import java.util.ArrayList; import java.util.List; import com.amazonaws.AmazonServiceException; import com.amazonaws.auth.AWSCredentials; import com.amazonaws.auth.PropertiesCredentials; 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 { /** * @param args */ public static void main(String[] args) { //============================================================================================// //=============================== Submitting a Request =======================================// //============================================================================================// // Retrieves the credentials from an AWSCredentials.properties file. AWSCredentials credentials = null; try { credentials = new PropertiesCredentials( InlineGettingStartedCodeSampleApp.class.getResourceAsStream("AwsCredentials.properties")); } catch (IOException e1) { System.out.println("Credentials were not properly entered into AwsCredentials.properties."); System.out.println(e1.getMessage()); System.exit(-1); } // Create the AmazonEC2Client object so we can call various APIs. AmazonEC2 ec2 = new AmazonEC2Client(credentials); // 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()); } } }