Adding http path parameters dynamically in wso2 esb - wso2

Question

We have a proxy service which uses jms transport to receive messages. The messages received need to be sent to a backend REST service using http POST.
The following is done on the messages
xslt transformation to extract specific fields
set message type to application/json
send to the endpoint
The REST service endpoint needs to have a path parameter appended dynamically using one of the values that comes as part of the input message from jms. The url will look like
http://<server-ip>/service/<client>. Here the value for the "client" comes as part of the message.
How can we dynamically add the path param using wso2 esb?

Answer 1

I believe what you are looking for is the REST_URL_POSTFIX property. If you set this property, the value will be appended to the rest endpoint url.
It can be defined as follows with the scope of axis2.
<property name="REST_URL_POSTFIX"
          expression="//client"
          scope="axis2"
         type="STRING"/>
An example on this can be found in this guide, Using REST with a Proxy Service.
EDIT: Following is example using a simple proxy with a POST request using curl. Providing as per the comments. Here, I'm invoking the jaxrs_basic rest service in WSO2 Application Server.
curl -H "Content-Type: application/xml" -H "Accept: application/json" -d "<Customer><name>KasunG</name></Customer>" http://localhost:8281/services/new1/
.
curl -H "Content-Type: application/json" -H "Accept: application/json" -d "{ 'Customer' : { 'name' : 'KasunG' } } " http://localhost:8281/services/new1/
.
<?xml version="1.0" encoding="UTF-8"?>
<proxy xmlns="http://ws.apache.org/ns/synapse"
name="new1"
transports="https http"
startOnLoad="true"
trace="disable">
<description/>
<target>
<inSequence>
<property name="REST_URL_POSTFIX"
value="customers"
scope="axis2"
type="STRING"/>
<property name="ContentType" value="text/xml" scope="axis2" type="STRING"/>
<switch source="$axis2:HTTP_METHOD">
<case regex="GET">
<property name="HTTP_METHOD" value="GET" scope="axis2" type="STRING"/>
</case>
<case regex="POST">
<property name="messageType" value="application/json" scope="axis2"/>
<property name="ContentType"
value="application/JSON"
scope="axis2"
type="STRING"/>
<property name="HTTP_METHOD" value="POST" scope="axis2" type="STRING"/>
</case>
<default/>
</switch>
<send>
<endpoint>
<address uri="http://localhost:8888/jaxrs_basic/services/customers/customerservice"
format="rest"/>
</endpoint>
</send>
</inSequence>
<outSequence>
<property name="messageType" value="application/json" scope="axis2"/>
<send/>
</outSequence>
</target>
</proxy>

Answer 2

I think links [1] & [2] will help you to set jms with WSO2 proxy... To dynamically add path param to the url use the link [3], it is for XML configuration file. similar to this you can assign the part of the message to a property add append that to the url...
[1] http://docs.wso2.org/wiki/display/ESB460/Publish-Subscribe+%28Pub-Sub%29+with+JMS
[2] http://wso2.org/library/articles/2011/11/wso2-esb-example-two-wayrequestresponse-semantic-jms
[3] How to dynamically route message in WSO2 ESB based on XML configuration file
Thanks,
Mohan