sqsAlertInbound.java Source code

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Here is the source code for sqsAlertInbound.java

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/*
 * Copyright 2010-2015 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.List;
import java.util.Map.Entry;

import org.apache.commons.codec.binary.Base64;

import com.amazonaws.AmazonClientException;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.services.sqs.AmazonSQS;
import com.amazonaws.services.sqs.model.DeleteMessageRequest;
import com.amazonaws.services.sqs.model.Message;
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>
 * Fill in your AWS access credentials in the provided credentials file
 * template, and be sure to move the file to the default location
 * (/Users/johnreilly/.aws/credentials) where the sample code will load the credentials from.
 * <p>
 * <b>WARNING:</b> To avoid accidental leakage of your credentials, DO NOT keep
 * the credentials file in your source directory.
 */
public class sqsAlertInbound {

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

        // get credentials
        String user = "jreilly";
        AWSCredentials credentials = whgHelper.getCred(user);

        // use credentials to set access to SQS
        AmazonSQS sqs = whgHelper.setQueueAccess(credentials);

        // define queue that messages will be retrieved from
        String thisQueue = "alertInbound";
        String nextQueue = "alertPersist";

        while (1 > 0) {

            // pull list of current messages (up to 10) in the queue
            List<Message> messages = whgHelper.getMessagesFromQueue(thisQueue, sqs);
            System.out.println("Count of messages in " + thisQueue + ": " + messages.size());

            try {

                for (Message message : messages) {

                    whgHelper.printMessage(message);
                    for (Entry<String, String> entry : message.getAttributes().entrySet()) {
                        whgHelper.printMessageEntry(entry);
                    }

                    // validate JSON for completeness and form and handle errors
                    //               if (sqs == null) {
                    //                  sqs.sendMessage(new SendMessageRequest("alertErrorHandling", message.getBody()));
                    //               }

                    // call a function to transform message
                    String alertJSON = String.valueOf(Base64.decodeBase64(message.getBody()));
                    System.out.println("Transformed JSON: " + alertJSON);

                    // send message to next queue
                    System.out.println("Sending message to next queue.");
                    sqs.sendMessage(new SendMessageRequest(nextQueue, alertJSON));

                    // delete message from this queue
                    System.out.println("Deleting message.\n");
                    String messageRecieptHandle = message.getReceiptHandle();
                    sqs.deleteMessage(new DeleteMessageRequest(thisQueue, messageRecieptHandle));

                }
                Thread.sleep(20000); // do nothing for 1000 miliseconds (1 second)

            } catch (AmazonServiceException ase) {
                whgHelper.errorMessagesAse(ase);
            } catch (AmazonClientException ace) {
                whgHelper.errorMessagesAce(ace);
            }
        }
    }
}