com.DeadLetterSender.java Source code

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Here is the source code for com.DeadLetterSender.java

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/*
 *  Copyright (c) 2015, WSO2 Inc. (http://www.wso2.org) 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.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License 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 com;

import java.util.HashMap;
import java.util.Map;
import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.Channel;

public class DeadLetterSender {

    private final static String QUEUE_NAME = "request-queue";
    private final static String EXCHANGE_NAME = "request-exchange";
    private final static String HOSTNAME = "localhost";
    private final static String REPLY_QUEUE_NAME = "callback-queue";

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

        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost(HOSTNAME);
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();

        try {
            channel.exchangeDeclarePassive(EXCHANGE_NAME);
        } catch (java.io.IOException e) {
            if (!channel.isOpen())
                channel = connection.createChannel();
            channel.exchangeDeclare(EXCHANGE_NAME, "direct", true);
        }

        try {
            channel.queueDeclarePassive(QUEUE_NAME);
        } catch (java.io.IOException e) {
            if (!channel.isOpen())
                channel = connection.createChannel();
            channel.queueDeclare(QUEUE_NAME, false, false, false, null);
        }
        channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, QUEUE_NAME);

        // Request Message
        String message = "<soapenv:Envelope" + " xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\">\n"
                + "<soapenv:Body>\n" + "  <p:greet xmlns:p=\"http://service.wso2.org\">\n" + "     <in>" + "IBM"
                + "</in>\n" + "  </p:greet>\n" + "</soapenv:Body>\n" + "</soapenv:Envelope>";

        // Adding Message Properties
        AMQP.BasicProperties.Builder builder = new AMQP.BasicProperties().builder();
        builder.messageId("007");
        builder.contentType("text/xml");
        builder.correlationId("1111");
        builder.replyTo(REPLY_QUEUE_NAME);
        builder.contentEncoding("UTF-8");

        // Custom user properties
        Map<String, Object> headers = new HashMap<String, Object>();
        headers.put("SOAP_ACTION", "getQuote");
        builder.headers(headers);

        // Publish the message to exchange
        channel.basicPublish(EXCHANGE_NAME, QUEUE_NAME, builder.build(), message.getBytes());
        channel.close();
        connection.close();
    }
}