How can I invoke web services using jBoss jBpm?

[bonfarj]

My research group decided to use jBoss jBpm in our system. We'll need to invoke web services, but I only know how to execute Java classes in the action tags (jPdl). Can I invoke web services instead of java classes?

thanks!

[kukeltje]

Currently you can't do this directly from a jBPM actionhandler (work is going on in one) so you have to write an actionhandler yourself which invokes the webservice. You can make this configurable any way you want.

[bonfarj]

Cool, I'm happy to know that jBpm will permit web services invoking in future!

But now, there's any example of an ActionHandler that invokes a web services? I don't know how to do this.

thanks my friends!

[brianmb99]

"bonfarj" wrote:

But now, there's any example of an ActionHandler that invokes a web services? I don't know how to do this.

As Ronald pointed out, you'll have to write your own code to call a ws at this point. The eclipse WTP project provides tools for creating java webservice clients, and Apache's Axis project provides (among other things) a client framework for making ws calls. There are many other options available, too. Here's an Axis example:

import org.apache.axis.client.Call;
import org.apache.axis.client.Service;

import javax.xml.namespace.QName;

import org.jbpm.graph.def.ActionHandler;

public class MyActionHandler extends ActionHandler
{
 public void execute(ExecutionContext executionContext) throws Exception {
 try {
 String endpoint = "http://nagoya.apache.org:5049/axis/services/echo";

 Service service = new Service();
 Call call = (Call) service.createCall();

 call.setTargetEndpointAddress( new java.net.URL(endpoint) );
 call.setOperationName(new QName("http://soapinterop.org/", "echoString") );

 // Call to addParameter/setReturnType as described in user-guide.html
 //call.addParameter("testParam",
 // org.apache.axis.Constants.XSD_STRING,
 // javax.xml.rpc.ParameterMode.IN);
 //call.setReturnType(org.apache.axis.Constants.XSD_STRING);

 String ret = (String) call.invoke( new Object[] { "Hello!" } );

 System.out.println("Sent 'Hello!', got '" + ret + "'");
 } catch (Exception e) {
 System.err.println(e.toString());
 }
 }
}

The axis code here is right from the axis user guide page at http://ws.apache.org/axis/java/user-guide.html.

Hope that helps.

Brian

[bonfarj]

I got it!, thank you Brian!

;- )