AwsEc2Demo.java Source code

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Here is the source code for AwsEc2Demo.java

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/*
 * Copyright 2010-2014 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.HashSet;
import java.util.List;
import java.util.Set;

import com.amazonaws.AmazonClientException;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.services.ec2.AmazonEC2;
import com.amazonaws.services.ec2.AmazonEC2Client;
import com.amazonaws.services.ec2.model.DescribeAvailabilityZonesResult;
import com.amazonaws.services.ec2.model.DescribeInstancesResult;
import com.amazonaws.services.ec2.model.Instance;
import com.amazonaws.services.ec2.model.Reservation;

/**
 * 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/
 *
 *  - A subscription to Amazon SimpleDB. You can sign up for Simple DB at:
 *       http://aws.amazon.com/simpledb/
 *
 *  - A subscription to Amazon S3. You can sign up for S3 at:
 *       http://aws.amazon.com/s3/
 */
public class AwsEc2Demo {

    /*
     * 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
     *
     * WANRNING:
     *      To avoid accidental leakage of your credentials, DO NOT keep
     *      the credentials file in your source directory.
     */

    static AmazonEC2 ec2;

    /**
     * The only information needed to create a client are security credentials
     * consisting of the AWS Access Key ID and Secret Access Key. All other
     * configuration, such as the service endpoints, are performed
     * automatically. Client parameters, such as proxies, can be specified in an
     * optional ClientConfiguration object when constructing a client.
     *
     * @see com.amazonaws.auth.BasicAWSCredentials
     * @see com.amazonaws.auth.PropertiesCredentials
     * @see com.amazonaws.ClientConfiguration
     */
    private static void init() throws Exception {

        /*
         * 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);
        }
        ec2 = new AmazonEC2Client(credentials);
    }

    public static void main(String[] args) throws Exception {

        System.out.println("===========================================");
        System.out.println("Welcome to the AWS Java SDK!");
        System.out.println("===========================================");

        init();

        /*
         * Amazon EC2
         *
         * The AWS EC2 client allows you to create, delete, and administer
         * instances programmatically.
         *
         * In this sample, we use an EC2 client to get a list of all the
         * availability zones, and all instances sorted by reservation id.
         */
        try {
            DescribeAvailabilityZonesResult availabilityZonesResult = ec2.describeAvailabilityZones();
            System.out.println("You have access to " + availabilityZonesResult.getAvailabilityZones().size()
                    + " Availability Zones.");

            DescribeInstancesResult describeInstancesRequest = ec2.describeInstances();
            List<Reservation> reservations = describeInstancesRequest.getReservations();
            Set<Instance> instances = new HashSet<Instance>();

            for (Reservation reservation : reservations) {
                instances.addAll(reservation.getInstances());
            }

            System.out.println("You have " + instances.size() + " Amazon EC2 instance(s) running.");
        } catch (AmazonServiceException ase) {
            System.out.println("Caught Exception: " + ase.getMessage());
            System.out.println("Reponse Status Code: " + ase.getStatusCode());
            System.out.println("Error Code: " + ase.getErrorCode());
            System.out.println("Request ID: " + ase.getRequestId());
        }
    }
}