2 Replies Latest reply on Jan 28, 2008 12:18 AM by shefagarwal

How to invoke web-service from Bpel process

shefagarwal Jan 25, 2008 3:17 AM

Hello,
I' working with Eclipse europa and the Eclipse BPEL Designer Runtimes 0.2.0.
The server is jBoss 4.0.5 GA with jbpm-bpel-1.1.GA.
I'm developing a very simple bpel process with an invocation to a external web service (the ticket service of the atm example).
I have the following files:
ticket.wsdl greet.wsdl greetArtifacts.wsdl greet.bpel greet.bpelex WsClient.java

Desc of each file
Ticket.wsdl: interface to ticket web-service
greet.bpel: process file
greet.bpelex: bpel extensions file (automatically generated)
greet.wsdl: interface to bpel process
greetArtifacts.wsdl: automatically generated
WsClient.java: Java client program to invoke the service

Code of each file:

-----------------------------greet.bpel--------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<bpws:process exitOnStandardFault="yes" name="greet"
targetNamespace="http://eclipse.org/bpel/sample"
xmlns:bpws="http://docs.oasis-open.org/wsbpel/2.0/process/executable"
xmlns:grt="http://eclipse.org/bpel/sample"
xmlns:ns="http://eclipse.org/bpel/sampleArtifacts"
xmlns:tic="http://jbpm.org/examples/ticket" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<bpws:import importType="http://schemas.xmlsoap.org/wsdl/"
location="greet.wsdl" namespace="http://eclipse.org/bpel/sample"/>
<bpws:import importType="http://schemas.xmlsoap.org/wsdl/"
location="interface/ticket.wsdl" namespace="http://jbpm.org/examples/ticket"/>
<bpws:import importType="http://schemas.xmlsoap.org/wsdl/"
location="greetArtifacts.wsdl" namespace="http://eclipse.org/bpel/sampleArtifacts"/>
<bpws:import importType="http://schemas.xmlsoap.org/wsdl/"
location="interface/ticket.wsdl" namespace="http://jbpm.org/examples/ticket"/>
<bpws:partnerLinks>
<bpws:partnerLink myRole="greetProvider" name="client" partnerLinkType="grt:greet"/>
<bpws:partnerLink name="ticket"
partnerLinkType="ns:Front-Ticket" partnerRole="TicketIssuer"/>
</bpws:partnerLinks>
<bpws:variables>
<bpws:variable messageType="tic:ticketMessage" name="ticketResponse"/>
<bpws:variable messageType="tic:ticketRequest" name="ticketRequest"/>
</bpws:variables>
<bpws:sequence name="main">
<bpws:receive createInstance="yes" name="receiveInput"
operation="process" partnerLink="client"
portType="grt:greet" variable="ticketRequest"/>
<bpws:invoke inputVariable="ticketRequest" name="CreateTicket"
operation="createTicket" outputVariable="ticketResponse"
partnerLink="ticket" portType="tic:TicketIssuer"/>
<bpws:reply name="replyOutput" operation="process"
partnerLink="client" portType="grt:greet" variable="ticketResponse"/>
</bpws:sequence>
</bpws:process>
-------------------------------------------------------------------------------------
----------------------------------greet.bpelex------------------------------------
<?xml version="1.0" encoding="ASCII"?>
<extensionmodel:ExtensionMap xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:extensionmodel="http:///extensionmodel.ecore" xmlns:org.eclipse.bpel.ui.uiextensionmodel="http:///org/eclipse/bpel/ui/uiextensionmodel.ecore" namespace="http://org.eclipse.bpel.ui/">

<extensionObject xsi:type="org.eclipse.bpel.ui.uiextensionmodel:VariableExtension"/>

<extensionObject xsi:type="org.eclipse.bpel.ui.uiextensionmodel:VariableExtension"/>

<extensionObject xsi:type="org.eclipse.bpel.ui.uiextensionmodel:ActivityExtension"/>

<extensionObject xsi:type="org.eclipse.bpel.ui.uiextensionmodel:ActivityExtension"/>

<extensionObject xsi:type="org.eclipse.bpel.ui.uiextensionmodel:ActivityExtension"/>

<extensionObject xsi:type="org.eclipse.bpel.ui.uiextensionmodel:ProcessExtension" modificationStamp="1201170068297"/>

<extensionObject xsi:type="org.eclipse.bpel.ui.uiextensionmodel:ActivityExtension"/>

<extensionObject xsi:type="org.eclipse.bpel.ui.uiextensionmodel:CopyExtension"/>

</extensionmodel:ExtensionMap>
--------------------------------------------------------------------------------------
-----------------------------------greet.wsdl---------------------------------------
<?xml version="1.0"?>
<definitions name="greet"
targetNamespace="http://eclipse.org/bpel/sample"
xmlns:grt="http://eclipse.org/bpel/sample" xmlns:tic="http://jbpm.org/examples/ticket"
xmlns:plnk="http://docs.oasis-open.org/wsbpel/2.0/plnktype"
xmlns="http://schemas.xmlsoap.org/wsdl/" xmlns:xsd="http://www.w3.org/2001/XMLSchema"
>













<plnk:partnerLinkType name="greet">
<plnk:role name="greetProvider" portType="grt:greet"/>
</plnk:partnerLinkType>

--------------------------------------------------------------------------------------
------------------------------------greetArtifacts.wsdl----------------------------
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<definitions xmlns:plnk="http://docs.oasis-open.org/wsbpel/2.0/plnktype" xmlns:tns="http://eclipse.org/bpel/sampleArtifacts" xmlns:vprop="http://docs.oasis-open.org/wsbpel/2.0/varprop" xmlns:wsdl="http://jbpm.org/examples/ticket" name="greetArtifacts" targetNamespace="http://eclipse.org/bpel/sampleArtifacts" xmlns="http://schemas.xmlsoap.org/wsdl/">

<plnk:partnerLinkType name="Front-Ticket">
<plnk:role name="TicketIssuer" portType="wsdl:TicketIssuer"/>
</plnk:partnerLinkType>

--------------------------------------------------------------------------------------
---------------------------------ticket.wsdl-----------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<definitions targetNamespace="http://jbpm.org/examples/ticket"
xmlns:tns="http://jbpm.org/examples/ticket" xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns="http://schemas.xmlsoap.org/wsdl/">

ticket creation request

ticket number wrapper

interface to ticket issuer service

generate a ticket number, distinct from previous calls

--------------------------------------------------------------------------------------
----------------------------------WsClient.java------------------------------------
package com.test;

import java.net.URL;

import javax.xml.namespace.QName;
import javax.xml.rpc.Call;
import javax.xml.rpc.Service;
import javax.xml.rpc.ServiceFactory;

public class WsClient
{
private static String invokeWS() throws Exception
{
Service service;
String namespace = "http://eclipse.org/bpel/sample";
//In out case: "http://net.luminis.bpel"

URL url = new URL("http://ddc1a-01-378:8080/greet/greetProvider?wsdl");
//Our location: "http://localhost:8080/active-bpel/services/ProofOfConcept?wsdl"

QName qname = new QName(namespace, "greetService");

ServiceFactory factory = ServiceFactory.newInstance();
service = factory.createService(url, qname);

QName operation = new QName(namespace, "process");
QName port = new QName(namespace, "greetProviderPort");

Call call = service.createCall(port, operation);

return (String) call.invoke(null);
}

public static void main(String[] args)
{
try {
System.out.println("Invoke: " + invokeWS() );
System.out.println("XercesImpl version being used: " + org.apache.xerces.impl.Version.getVersion());

} catch (Exception e) {
// System.out.println("An error has occured!");
//System.out.println(e);
e.printStackTrace();
}
}
}
--------------------------------------------------------------------------------------

The BPEL process is getting deployed but when I try to invoke the process through client program, following exceptions occur in java console:

java.rmi.ServerException: The service is not in an appropiate state for the requested operation
at com.sun.xml.rpc.client.StreamingSender._raiseFault(StreamingSender.java:510)
at com.sun.xml.rpc.client.StreamingSender._send(StreamingSender.java:307)
at com.sun.xml.rpc.client.dii.CallInvokerImpl.doInvoke(CallInvokerImpl.java:103)
at com.sun.xml.rpc.client.dii.BasicCall.invoke(BasicCall.java:486)
at com.test.WsClient.invokeWS(WsClient.java:32)
at com.test.WsClient.main(WsClient.java:38)

and following exceptions in jboss console:

2008-01-25 13:18:41,622 ERROR [org.jbpm.bpel.integration.jms.StartListener] request delivery failed due to non-recoverable exception, giving up
org.jbpm.bpel.BpelException: no port implements the required port type: portType={http://jbpm.org/examples/ticket}TicketIssuer
at org.jbpm.bpel.endpointref.SoapEndpointReference.selectPort(SoapEndpointReference.java:97)
at org.jbpm.bpel.endpointref.SoapEndpointReference.selectPort(SoapEndpointReference.java:52)
at org.jbpm.bpel.integration.jms.IntegrationControl.createPartnerClient(IntegrationControl.java:258)
at org.jbpm.bpel.integration.jms.IntegrationControl.getPartnerClient(IntegrationControl.java:239)
at org.jbpm.bpel.integration.jms.JmsIntegrationService.invoke(JmsIntegrationService.java:172)
at org.jbpm.bpel.integration.def.InvokeAction.execute(InvokeAction.java:76)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:185)
at org.jbpm.graph.def.Action$$EnhancerByCGLIB$$d59d8d76.execute()
at org.jbpm.graph.def.GraphElement.executeAction(GraphElement.java:264)
at org.jbpm.graph.def.Node.execute(Node.java:339)
at org.jbpm.bpel.graph.def.Activity.enter(Activity.java:110)
at org.jbpm.graph.def.Transition.take(Transition.java:151)
at org.jbpm.graph.def.Node.leave(Node.java:394)
at org.jbpm.bpel.graph.def.Activity.leave(Activity.java:200)
at org.jbpm.bpel.graph.basic.Receive.messageReceived(Receive.java:53)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:185)
at org.jbpm.bpel.graph.basic.Receive$$EnhancerByCGLIB$$952e287.messageReceived()
at org.jbpm.bpel.integration.def.ReceiveAction.deliverMessage(ReceiveAction.java:99)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:185)
at org.jbpm.bpel.integration.def.ReceiveAction$$EnhancerByCGLIB$$88609d70.deliverMessage()
at org.jbpm.bpel.integration.jms.StartListener.deliverRequest(StartListener.java:222)
at org.jbpm.bpel.integration.jms.StartListener.onMessage(StartListener.java:168)
at org.jboss.mq.SpyMessageConsumer.run(SpyMessageConsumer.java:696)
at java.lang.Thread.run(Thread.java:595)

Please, can someone help me?
Sorry for the long post and thanks in advance

Shefali

1. Re: How to invoke web-service from Bpel process

aguizar Jan 25, 2008 5:45 AM (in response to shefagarwal)
Shefali,

Maybe you did not register the ticket service in the service catalog. To check this, point your browser to http://localhost:8080/jbpm-bpel/partners.jsp and make sure the ticket service is listed there. If you do not see it, you can register it using the form that also appears in that page.

You can also use Ant to register partner services. Look for target register.partners in the build file of the atm example.

<target name="register.partners" depends="define.register.task" description="register partner services"> <registerpartner baselocation="http://localhost:8080/ticket/ticketIssuer?wsdl" /> <registerpartner baselocation="http://localhost:8080/account/accountSystem?wsdl" /> </target>

Here, the baselocation attribute specifies the absolute location of the WSDL document that describes the partner service. You may want to define this target in your own build file so that partner registration occurs automatically. If you do, remove the registerpartner task for the accountSystem service as you are not using that service.
Actions
2. Re: How to invoke web-service from Bpel process

shefagarwal Jan 28, 2008 12:18 AM (in response to shefagarwal)

Thanks Alejandro for your response. It works :)
Actions

Go to original post