com.cloud.Assignment.QueueSender.java Source code

Introduction

Here is the source code for com.cloud.Assignment.QueueSender.java

Source

package com.cloud.Assignment;

/*
 * 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.Properties;

import com.amazonaws.AmazonClientException;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.ClasspathPropertiesFileCredentialsProvider;
import com.amazonaws.regions.Region;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.sqs.AmazonSQS;
import com.amazonaws.services.sqs.AmazonSQSClient;
import com.amazonaws.services.sqs.model.SendMessageRequest;

/**
 * This sample demonstrates how to make basic requests to Amazon SQS using the
 * AWS SDK for Java.
 * <p>
 * <b>Prerequisites:</b> You must have a valid Amazon Web Services developer
 * account, and be signed up to use Amazon SQS. For more information on Amazon
 * SQS, see http://aws.amazon.com/sqs.
 * <p>
 * WANRNING:</b> To avoid accidental leakage of your credentials, DO NOT keep
 * the credentials file in your source directory.
 */
public class QueueSender {

    public static String URLMap = "QueueURL.properties";

    private boolean isMessagePosted = false;

    public boolean sendToQueue(String queue, String message) throws Exception {
        Properties props = new Properties();
        AWSCredentials credentials = null;
        String myQueueUrl = null;
        System.out.println("Queue :" + queue + " Message :" + message);
        try {
            credentials = new ClasspathPropertiesFileCredentialsProvider("AwsCredentials.properties")
                    .getCredentials();
            ClassLoader loader = Thread.currentThread().getContextClassLoader();

            props.load(loader.getResourceAsStream("/QueueURL.properties"));
        } 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 (/Users/prabhus/.aws/credentials), and is in valid format.", e);
        }
        AmazonSQS sqs = new AmazonSQSClient(credentials);
        Region usWest2 = Region.getRegion(Regions.US_EAST_1);
        sqs.setRegion(usWest2);

        try {
            myQueueUrl = props.getProperty(queue);
            System.out.println("URL :" + myQueueUrl);
            System.out.println("Sending " + message);
            sqs.sendMessage(new SendMessageRequest(myQueueUrl, message));
            isMessagePosted = true;
        } catch (AmazonServiceException ase) {

            throw new AmazonServiceException("Caught an AmazonServiceException, which means your request made it "
                    + "to Amazon SQS, but was rejected with an error response for some reason.");

        } catch (AmazonClientException ace) {
            System.out.println("Error Message: " + ace.getMessage());
            throw new AmazonClientException("Caught an AmazonClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with SQS, such as not "
                    + "being able to access the network.");

        }
        return isMessagePosted;
    }
}