Invoking RESTful service from WSO2 ESB using method POST - wso2

Question

I have a simple RESTful service that I want to expose as SOAP based Web Service using WSO2 ESB.
My simple RESTful service can be invoked like http://<<my system>>:8080/myapp/person/read
As response, I get JSON data of the Person entity.
Problem: I am not able to pass parameters to the RESTful service. I am to strip the param value from the SOAP input, but don't know how to pass it to my RESTful; service using ESB.
I have configured the following in WSO2 ESB
<proxy xmlns="http://ws.apache.org/ns/synapse" name="PersonProxy" transports="https,http" statistics="enable" trace="enable" startOnLoad="true">
<target>
<inSequence>
<property xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" name="PERSON_ID" expression="//soapenv:Body/person/id"/>
<log level="full">
<property name="PERSON_ID" expression="get-property('PERSON_ID')"/>
</log>
<filter xpath="//person">
<then>
<property name="REST_URL_POSTFIX" value="read" scope="axis2" type="STRING"/>
<property name="HTTP_METHOD" value="POST" scope="axis2" type="STRING"/>
<property name="id" expression="get-property('PERSON_ID')" scope="axis2" type="STRING"/>
<property name="ContentType" value="application/x-www-form-urlencoded" scope="axis2" type="STRING"/>
</then>
<else/>
</filter>
<send>
<endpoint>
<address uri="http://<<my system>>:8080/myapp/person" format="rest"/>
</endpoint>
</send>
</inSequence>
<outSequence>
<send/>
</outSequence>
</target>
<description></description>
</proxy>
My SOAP request looks like following
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header/>
<soapenv:Body>
<person>
<id>3</id>
</person>
</soapenv:Body>
</soapenv:Envelope>
I have another RESTful service with GET method and id as part of the URL itself, and that works fine. The ESB config looks like
<property name="REST_URL_POSTFIX" expression="get-property('PERSON_ID')" scope="axis2" type="STRING"/>
<property name="HTTP_METHOD" value="GET" scope="axis2" type="STRING"/>
<endpoint>
<address uri="http://<<my system>>:8080/cfs/person" format="rest"/>
</endpoint>
Appreciate any pointers or help.

Answer 1

If your service can be invoked as http://<<my system>>:8080/myapp/person/id, you can read the id from the SOAP request and send it using "REST_URL_POSTFIX" property as below.
<property name="REST_URL_POSTFIX" expression="//person/id" scope="axis2" type="STRING"/>
Take a look at this example which implements a similar scenario.

Answer 2

You can also try using the HTTP Endpoint which is new in ESB 4.7.0. You can define a URI Template much like in the REST API. Populating the template variables is done via property mediators - so anything you can do with a property mediator can be used to define the endpoint URL during mediation run time.