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Using the HTTP Inbound Endpoint

This sample demonstrates how an HTTP inbound endpoint can act as a dynamic http listener. Many http listeners can be added without restarting the server. When a message arrives at a port it will bypass the inbound side axis2 layer and will be sent directly to the sequence for mediation. The response also behaves in the same way.

Synapse configuration

Following are the integration artifacts that we can used to implement this scenario. See the instructions on how to build and run this example.

<?xml version="1.0" encoding="UTF-8"?>
<inboundEndpoint xmlns="http://ws.apache.org/ns/synapse"
               name="HttpListenerEP1"
               sequence="TestIn"
               onError="fault"
               protocol="http"
               suspend="false">
   <parameters>
   <parameter name="inbound.http.port">8085</parameter>
   </parameters>
</inboundEndpoint>

<?xml version="1.0" encoding="UTF-8"?>
<sequence xmlns="http://ws.apache.org/ns/synapse" name="TestIn">
   <call>
      <endpoint>
            <address uri="http://localhost:9000/services/SimpleStockQuoteService"/>
      </endpoint>
   </call>
   <respond/>
</sequence>

Build and run

Create the artifacts:

  1. Set up WSO2 Integration Studio.
  2. Create an integration project with an ESB Configs module and an Composite Exporter.
  3. Create a mediation sequence and inbound endpoint with configurations given in the above example.
  4. Deploy the artifacts in your Micro Integrator.

Set up the back-end service:

  1. Download the back-end service.
  2. Extract the downloaded zip file.
  3. Open a terminal, navigate to the axis2Server/bin/ directory inside the extracted folder.

  4. Execute the following command to start the axis2server with the SimpleStockQuote back-end service:

    sh axis2server.sh

    axis2server.bat

Invoke the inbound endpoint with the below request.

POST http://localhost:8085 HTTP/1.1
Accept-Encoding: gzip,deflate
Content-Type: text/xml;charset=UTF-8
SOAPAction: "urn:getQuote"
Content-Length: 492
Host: localhost:8290
Connection: Keep-Alive
User-Agent: Apache-HttpClient/4.1.1 (java 1.5)

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ser="http://services.samples" xmlns:xsd="http://services.samples/xsd">
   <soapenv:Header/>
   <soapenv:Body>
      <ser:getQuote xmlns:ser="http://services.samples" xmlns:xsd="http://services.samples/xsd">
         <!--Optional:-->
         <ser:request>
            <!--Optional:-->
            <xsd:symbol>IBM</xsd:symbol>
         </ser:request>
      </ser:getQuote>
   </soapenv:Body>
</soapenv:Envelope>

The inbound endpoint will capture any request coming through the 8085 port and divert it to the TestIn sequence.

For further details, analyze the output debug messages for the actions in the dumb client mode. You will see that the Micro Integrator receives a message when the Micro Integrator Inbound is set as the ultimate receiver. You will also see the response from the backend in the client.