sqsAlertCache.java Source code

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Here is the source code for sqsAlertCache.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.net.InetSocketAddress;
import java.util.List;
import java.util.Map.Entry;

import net.spy.memcached.MemcachedClient;

import com.amazonaws.AmazonClientException;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient;
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 sqsAlertCache {

    static AmazonDynamoDBClient dynamoDB;

    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 = "alertCache";
        String nextQueue = "alertStream";

        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);
                    }

                    String configEndpoint = "alertsbrdregrol-001.tiluxk.0001.use1.cache.amazonaws.com";
                    Integer clusterPort = 6379;

                    MemcachedClient client = new MemcachedClient(
                            new InetSocketAddress(configEndpoint, clusterPort));
                    // The client will connect to the other cache nodes automatically
                    // Store a data item for an hour. The client will decide which cache
                    client.set(message.getMessageId(), 360000, message.getBody());

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

                    // delete message after sending to persist queue
                    System.out.println("Deleting message from this queue.\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);
            }
        }
    }
}