Apache Synapse

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## Sample 253: One-way Bridging from JMS to HTTP and Replying with a 202 Accepted Response

<definitions xmlns="http://ws.apache.org/ns/synapse"> <proxy name="JMStoHTTPStockQuoteProxy" transports="jms"> <target> <inSequence> <property action="set" name="OUT_ONLY" value="true"/> </inSequence> <endpoint> <address uri="http://localhost:9000/services/SimpleStockQuoteService"/> </endpoint> <outSequence> <send/> </outSequence> </target> <publishWSDL uri="file:repository/conf/sample/resources/proxy/sample_proxy_1.wsdl"/> </proxy> <proxy name="OneWayProxy" transports="http"> <target> <inSequence> <log level="full"/> </inSequence> <endpoint> <address uri="http://localhost:9000/services/SimpleStockQuoteService"/> </endpoint> <outSequence> <send/> </outSequence> </target> <publishWSDL uri="file:repository/conf/sample/resources/proxy/sample_proxy_1.wsdl"/> </proxy> </definitions>

### Objective

This sample demonstrates the ability of Synapse to perform transport switching between JMS and HTTP. It also shows how to configure a one-way HTTP proxy in Synapse.

### Pre-requisites

- Deploy the SimpleStockQuoteService in the sample Axis2 server and start Axis2
- Setup and start a JMS broker (Apache ActiveMQ can be used as the JMS broker for this scenario. Refer JMS setup guide for information on how to run ActiveMQ.)
- Enable the JMS transport receiver of Synapse (Refer JMS setup guide for more details)
- Start Synapse using the configuration numbered 253 (repository/conf/sample/synapse_sample_253.xml)
  Unix/Linux: sh synapse.sh -sample 253
  Windows: synapse.bat -sample 253

### Executing the Client

This example invokes the one-way 'placeOrder' operation on the SimpleStockQuoteService using the Axis2 ServiceClient.fireAndForget() API at the client. To test this, run the sample client as follows and you will notice the one-way JMS message flowing through Synapse into the sample Axis2 server instance over HTTP, and Axis2 acknowledging it with a HTTP 202 Accepted response.

ant stockquote -Dmode=placeorder -Dtrpurl="jms:/JMStoHTTPStockQuoteProxy?\ transport.jms.ConnectionFactoryJNDIName=QueueConnectionFactory\ &java.naming.factory.initial=org.apache.activemq.jndi.ActiveMQInitialContextFactory\ &java.naming.provider.url=tcp://localhost:61616\ &transport.jms.ContentTypeProperty=Content-Type&transport.jms.DestinationType=queue"

The second example shows how Synapse could be made to respond with a HTTP 202 Accepted response to a request received. The proxy service simply logs the message received and acknowledges it. To try this out, run the sample client as follows.

ant stockquote -Dmode=placeorder -Dtrpurl=http://localhost:8280/services/OneWayProxy

On the Synapse console you could see the logged message, and if TCPMon was used at the client, you would see the 202 Accepted response sent back to the client from Synapse.

HTTP/1.1 202 Accepted Content-Type: text/xml; charset=UTF-8 Host: 127.0.0.1 SOAPAction: "urn:placeOrder" Date: Sun, 06 May 2007 17:20:19 GMT Server: Synapse-HttpComponents-NIO Transfer-Encoding: chunked 0

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