This document shows how to configure a RESTful web service endpoint in Mule ESB without using its built-in REST component. It demonstrates setting up an HTTP inbound endpoint with request-response exchange pattern. When a request is received at the endpoint, the HTTP body is transformed to parameters then to XML response. This provides a simple RESTful web service that returns XML data based on URL query parameters.

2. These tutorials show how Mule ESB configure a function as a
RESTful WebService endpoint. Mule ESB provides a built-in
REST component based on Jersey project.
In the first example, we will explore the possibility of creating
RESTful web services without using the built-in component;

3. The following configuration settings are done in the ‘General’
tab of the HTTP component.
Exchange-patterns: request-response
Host: localhost
Port: 8081
Path: rest

4. The next component in the flow is Body to Parameter
Body. The last component in the flow is Maps to XML
component.
To invoke the application throught browser window:
http://localhost:8081/rest?name=Rori&age=33
The output generated in the browser window is shown
below:

5. <?xml version="1.0" encoding="UTF-8"?>
<table>
<record>
<field name="age"
type="java.lang.String">25</field>
<field name="name"
type="java.lang.String">Alexander</field>
</record>
</table>

6. The source code of the mule flow is shown below:
<?xml version="1.0" encoding="UTF-8"?>
<mule
xmlns:tracking=http://www.mulesoft.org/schema/mule/ee/t
racking xmlns:jdbc-
ee=http://www.mulesoft.org/schema/mule/ee/jdbc
xmlns:http="http://www.mulesoft.org/schema/mule/http"

7. <flow name="http_restfulwsFlow" >
<http:inbound-endpoint exchange-pattern="request-
response"
host="localhost" port="8081" path="rest“
mimeType="text/plain" contentType="text/plain«
doc:name="HTTP"/>
<response>
<jdbc-ee:maps-to-xml-transformer doc:name="Maps to
XML"/>
</response>
<http:body-to-parameter-map-transformer
doc:name="Body to Parameter Map"/>
</flow>
</mule>

8. The grapfhic flow is: