This documentation is for WSO2 Enterprise Service Bus version 5.0.0. For the latest ESB, view the latest WSO2 Enterprise Integrator documentation.

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Introduction

This sample demonstrates how one way message bridging from RabbitMQ to HTTP can be done using the inbound RabbitMQ endpoint.

Prerequisites

Building the sample

The XML configuration for this sample is as follows:

<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://ws.apache.org/ns/synapse">
    <taskManager provider="org.wso2.carbon.mediation.ntask.NTaskTaskManager"/>
    <sequence name="TestIn">
        <log level="full"/>
        <drop/>
    </sequence>  
    <inboundEndpoint name="test" onError="fault" protocol="rabbitmq"
        sequence="TestIn" suspend="false">
        <parameters>
            <parameter name="sequential">true</parameter>
            <parameter name="coordination">true</parameter>
            <parameter name="rabbitmq.server.host.name">localhost</parameter>
            <parameter name="rabbitmq.server.port">5672</parameter>
            <parameter name="rabbitmq.connection.factory">AMQPConnectionFactory</parameter>
            <parameter name="rabbitmq.server.user.name">guest</parameter>
            <parameter name="rabbitmq.server.password">guest</parameter>
            <parameter name="rabbitmq.queue.name">queue</parameter>
            <parameter name="rabbitmq.exchange.name">exchange</parameter>
        </parameters>
    </inboundEndpoint>
</definitions>

This configuration file synapse_sample_907.xml is available in the <ESB_HOME>/repository/samples directory.

To build the sample

  • Start the ESB with the sample 907 configuration. For instructions on starting a sample ESB configuration, see Starting the ESB with a sample configuration.
    The operation log keeps running until the server starts, which usually takes several seconds. Wait until the server has fully booted up and displays a message similar to "WSO2 Carbon started in n seconds."

Executing the sample

  • Use the following Java client to publish a request to the RabbitMQ broker.

    ConnectionFactory factory = new ConnectionFactory();
    factory.setHost("localhost");
    factory.setUsername("guest");
    factory.setPassword("guest");
    factory.setPort(5672);
    Channel channel = null;
    Connection connection = factory.newConnection();
    channel = connection.createChannel();
    channel.queueDeclare("queue", false, false, false, null);
    channel.exchangeDeclare("exchange", "direct", true);
    channel.queueBind("queue", "exchange", "route");
    
    // The message to be sent
    String message = "<m:placeOrder xmlns:m=\"http://services.samples\">" +
                    "<m:order>" +
                    "<m:price>100</m:price>" +
                    "<m:quantity>20</m:quantity>" +
                    "<m:symbol>RMQ</m:symbol>" +
                    "</m:order>" +
                    "</m:placeOrder>";
    
    // Populate the AMQP message properties
    AMQP.BasicProperties.Builder builder = new AMQP.BasicProperties().builder();
    builder.contentType("application/xml");
    
    // Publish the message to exchange
    channel.basicPublish("exchange", "queue", builder.build(), message.getBytes());

Analyzing the output

You will see the following Message content:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"><soapenv:Body><m:placeOrder xmlns:m="http://services.samples"><m:order><m:price>100</m:price><m:quantity>20</m:quantity><m:symbol>RMQ</m:symbol></m:order></m:placeOrder></soapenv:Body></soapenv:Envelope>

The RabbitMQ inbound endpoint gets the messages from the RabbitMQ broker and logs the messages in the ESB.



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