WSO2 EI as a RabbitMQ Message Producer

This section describes how WSO2 Enterprise Integrator(WSO2 EI) can be used to send messages to a RabbitMQ queue.

Following is a sample scenario that demonstrates how WSO2 EI is configured to listen to HTTP requests and publish them to a RabbitMQ server (message exchange).

Prerequisites

• Configure the RabbitMQ AMQP transport. For information on how to configure the transport, see Configuring the RabbitMQ AMQP transport.
• Start the WSO2 EI server.

Configure the sample

1. Create a custom proxy service with the following configuration. For more information on creating proxy services, see Working with Proxy Services.

   <?xml version="1.0" encoding="UTF­8"?>
   <proxy xmlns="http://ws.apache.org/ns/synapse" name="AMQPProducerSample" transports="http" statistics="disable" trace="disable" startOnLoad="true">
   <target>
    <inSequence>
       <property name="OUT_ONLY" value="true"/>
       <property name="FORCE_SC_ACCEPTED" value="true" scope="axis2"/>
        <send>
         <endpoint>
          <address uri="rabbitmq:/AMQPProducerSample?rabbitmq.server.host.name=localhost&amp;rabbitmq.server.port=5672&amp;rabbitmq.queue.name=queue&amp;rabbitmq.queue.route.key=route&amp;rabbitmq.exchange.name=exchange"/>
         </endpoint>
       </send>
    </inSequence>
    <outSequence>
           <send/>
    </outSequence>
   </target>
   <description/>
   </proxy> 

2. Use the following as a RabbitMQ consumer that will consume and display the incoming messages to the RabbitMQ queue.

   ConnectionFactoryfactory = new ConnectionFactory();
   factory.setHost("localhost");
   factory.setUsername("guest");
   factory.setPassword("guest");
   factory.setPort(5672);
    
   Connectionconnection = factory.new Connection();
   Channelchannel = connection.createChannel();
   channel.queueDeclare("queue",false,false,false,null);
   channel.exchangeDeclare("exchange","direct",true);
   channel.queueBind("queue","exchange","route");
    
   //Createtheconsumer
   QueueingConsumerconsumer = new QueueingConsumer(channel);
   channel.basicConsume("queue",true,consumer);
    
   //Startconsumingmessages
   while(true)
    {
    QueueingConsumer.Deliverydelivery = consumer.nextDelivery();
    String message = new String(delivery.getBody());
    }

Execute the sample client

Execute the following command from <EI_HOME>/sample/axis2Client, to send an HTTP message to the WSO2 EI proxy service.

ant stockquote -Daddurl=http://localhost:8280/services/AMQPProducerSample -Dmode=placeorder

Analyzing the output

You will see that the http request is sent to the given proxy service and that it is forwarded to the RabbitMQ server via the RabbitMQ AMQP transport sender. You can view the messages received at the RabbitMQ queue in the RabbitMQ SimpleProducer console.