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Red Hat JBoss Fuse - Invoking Process in JBoss BPM Suite using CXF-RS Client in Fuse

A week ago, I updated a demo on our JBoss Technology Evangelist Demo site, it is all about integrating JBoss Fuse the light weight integration ESB with JBoss BPM Suite, which allow enterprise to manage their business processes. For more information about integrating business process and ESB, please go back to one of my blog that talks about my thoughts on how they can be put together.

In this demo, I tried to showcase the technical side of how to put these two technology together. So here is how you do it.

  • Invoking Process in JBoss BPM Suite using CXF-RS Client in Fuse
  • Calling Restful services from process in JBoss BPM suite.

In JBoss BPM Suite 6.x we can make synchronize REST API calls to kick start, manage a business process and tasks in the process execution server, even retrieve result from it. here are some of the example queries you can make:

  • /runtime/{deploymentId}/process/{processDefId}/start
  • /runtime/{deploymentId}/workitem/{processItemId}/complete
  • /runtime/{deploymentId}/withvars/process/{processDefId}/start
  • /task/{taskId}/activate
  • /task/{taskId}/claim
  • /task/{taskId}/claimnextavailable
  • /task/{taskId}/complete

From JBoss Fuse integration side, we already have REST client component on Camel, so we can take advantage of that. First we are going to create an interface for the client, them setup the CXFRS Client,

<cxf:rsClient id="rsClient" address="{REST_URL}"
   loggingFeatureEnabled="true" >
    <bean class="org.apache.cxf.jaxrs.provider.JAXBElementProvider"/>
    <cxf:entry key="Charset" value="UTF-8"/>

In the above Example, I sending data with XML format, that's why I uses JAXB as my CXF provider. To send data into BPM suite execution server, you must have "map_" to begin with as your variable name. 
And after setting up the client, all we have to do is to reference it in our Camel route in Fuse. 

As for creating a REST API service for BPM process to call is even easier, we can now use the REST DSL that's new in JBoss Fuse 6.2 to set the REST endpoint
<rest path="/alert">
    <get uri="/richcust/{custName}/{amt}" produces="application/json">
      <to uri="direct:alert"/>

And in the process, all you have to do is to use the REST service task, 
And fill in the REST details like the URLs, methods you are using, such as GET or POST, also map the return output back to process.

And that's all! For more details codes, please find then under my Github 


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