Creating a new work item instance in a process using PAPI

Question

I'm seeing that there are a lot of questions on this forum about using Oracle BPM 10g's Java API called PAPI.
I just uploaded a step by step document on how you could do this using JDeveloper 11. Here's the link to this document: http://www.4shared.com/file/126507332/e814a3a8/CallingPapi.html. The Oracle BPM project I used for this step-by-step document is also in this zip file. If you're curious, this also describes how to download, install and start JDeveloper 11.
This is not formal Oracle documentation, but I know from teaching our Oracle BPM Bootcamp class that getting PAPI to work is sometimes a challenge and thought this might help. I tried to write it with the "Java Newbie" in mind so do not panic if you aren't an expert in Java (I'm sure not ?:| ).
This is a simple example that uses most of the logic found in the PAPI documentation on http://download.oracle.com/docs/cd/E13154_01/bpm/docs65/papi/index.html?t=modules/papi/c_Head_PAPI.html in the "Writing Your First Java PAPI Program" section of this document.
The document provides a step-by-step description on how how to use PAPI to:
<li> interface to processes running on an Oracle BPM Enterprise Engine using the same logic that is in the Oracle BPM PAPI documentation
<li> interface to processes running on an Oracle BPM Studio Engine
<li> list processes currently running on the Engine using the same logic that is in the Oracle BPM PAPI documentation
<li> list the work item instances running on the Engine using the same logic that is in the Oracle BPM PAPI documentation
<li> create a new work item instance in a process and pass in input argument variables to the new instance as it is created.
Hope you find this useful,
Dan

Answer 1

Hi
i have gone through your example. It gives good information how to connect to BPM engine through java papi client. I have followed exactly the same steps given in the PDF document. But it throws the exception on both java client side and BPM Suite.
Steps followed :
1. Import sampleproject.exp into Oracle BPM studio and start the BPM engine.
2. Imported the fuegopapi-client.jar and Write the JAVA PIPA client to connect Oracle BPM Engine.
complete example code:_
import fuego.papi.CommunicationException;
import fuego.papi.InstanceInfo;
import fuego.papi.ProcessService;
import fuego.papi.ProcessServiceSession;
import fuego.papi.OperationException;
import java.util.Properties;
public class ProcessAPIClient {
     public static void main(String[] args) {
/////////////////// API Initialization ///////////////////
Properties configuration = new Properties();
configuration.setProperty(ProcessService.DIRECTORY_ID, "default");
configuration.setProperty(ProcessService.DIRECTORY_PROPERTIES_FILE, "directory.xml");
configuration.setProperty(ProcessService.PROJECT_PATH, "C:\\Oracle\\OracleBPMWorkspace\\SampleProject" );
configuration.setProperty(ProcessService.WORKING_FOLDER, "/tmp");
try {
ProcessService processService = ProcessService.create(configuration);
/////////////////// Establish a session ///////////////////
ProcessServiceSession session = processService.createSession("test", "test", null);
/////////////////// Operate with PAPI ///////////////////
for (String processId : session.processesGetIds()) {
System.out.println("\n Process: " + processId);
for (InstanceInfo instance : session.processGetInstances(processId)) {
System.out.println(" -> " + instance.getId());
/////////////////// Close the session ///////////////////
session.close();
/////////////////// Release API Resources ///////////////////
processService.close();
} catch (CommunicationException e) {
System.out.println("Could not connect to Directory Service");
e.printStackTrace();
} catch (OperationException e) {
System.out.println("Could not perform the requested operation");
e.printStackTrace();
It throws the following exception and output on java client._
Could not enhance type with bytecode info: java.lang.NoSuchMethodError: org.apache.bcel.classfile.Method.getArgumentTypes()[Lorg/apache/bcel/generic/Type;
Could not enhance type with bytecode info: java.lang.NoSuchMethodError: org.apache.bcel.classfile.Method.getArgumentTypes()[Lorg/apache/bcel/generic/Type;
Could not enhance type with bytecode info: java.lang.NoSuchMethodError: org.apache.bcel.classfile.Method.getArgumentTypes()[Lorg/apache/bcel/generic/Type;
Could not enhance type with bytecode info: java.lang.NoSuchMethodError: org.apache.bcel.classfile.Method.getArgumentTypes()[Lorg/apache/bcel/generic/Type;
Could not enhance type with bytecode info: java.lang.NoSuchMethodError: org.apache.bcel.classfile.Method.getArgumentTypes()[Lorg/apache/bcel/generic/Type;
Could not enhance type with bytecode info: java.lang.NoSuchMethodError: org.apache.bcel.classfile.Method.getArgumentTypes()[Lorg/apache/bcel/generic/Type;
Could not enhance type with bytecode info: java.lang.NoSuchMethodError: org.apache.bcel.classfile.Method.getArgumentTypes()[Lorg/apache/bcel/generic/Type;
Could not enhance type with bytecode info: java.lang.NoSuchMethodError: org.apache.bcel.classfile.Method.getArgumentTypes()[Lorg/apache/bcel/generic/Type;
Could not enhance type with bytecode info: java.lang.NoSuchMethodError: org.apache.bcel.classfile.Method.getArgumentTypes()[Lorg/apache/bcel/generic/Type;
Creating ProcessService with id 'SampleProject'.
Local folder /tmp\system\Schema33871921573571055\catalogs found.
Loading catalogs from local folder: /tmp\system\Schema33871921573571055\catalogs
0 jars found locally.
[CatalogMgrCache] =======================
Registering CatalogMgr [SampleProject] ...CatalogManagerCache 23240993:
Managers:
Counters:
[CatalogMgrCache] =======================
CatalogMgr [SampleProject] REGISTERED!CatalogManagerCache 23240993:
Managers:
{SampleProject=fuego.util.LocalCatalogManager@40b187}
Counters:
ProcessService 'SampleProject' created successfully.
Process: /SampleProcess#Default-1.0
Unreachable Engine Tolerance (seconds):
by default: 0
to be used: 0
This papi client will not cache exceptions which imply that an engine could not be reached.
Exception in thread "main" java.lang.NoClassDefFoundError: javax/jms/MessageEOFException
     at java.lang.Class.forName0(Native Method)
     at java.lang.Class.forName(Class.java:169)
     at $Proxy24.<clinit>(Unknown Source)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
     at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
     at fuego.papi.impl.AbstractProcessControlHandler.newProxyInstance(AbstractProcessControlHandler.java:52)
     at fuego.papi.impl.rmi.RMIProcessControlHandler.createProxy(RMIProcessControlHandler.java:47)
     at fuego.papi.impl.rmi.RMIEngineAccessImpl.createProcessControl(RMIEngineAccessImpl.java:111)
     at fuego.papi.impl.ProcessServiceImpl.createProcessControl(ProcessServiceImpl.java:1082)
     at fuego.papi.impl.ProcessServiceSessionImpl$1.run(ProcessServiceSessionImpl.java:2698)
     at fuego.papi.impl.ProcessServiceImpl.executeEngineOp(ProcessServiceImpl.java:1675)
     at fuego.papi.impl.ProcessServiceSessionImpl.getProcessControl(ProcessServiceSessionImpl.java:2703)
     at fuego.papi.impl.ProcessServiceSessionImpl.processGetInstances(ProcessServiceSessionImpl.java:2365)
     at com.eds.comet.bpm.oracle.papi.client.ProcessAPIClient.main(ProcessAPIClient.java:30)
Caused by: java.lang.ClassNotFoundException: javax.jms.MessageEOFException
     at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
     at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
     ... 16 more
It throws the following exception and output on Oracle BPM Suite._
Client 'Id=test, Name=test, In=1, Session=564242434' was not found in lists ', PARTICIPANTS' while disconnecting it.
Please help me to resolve this. I noticed it is able to connect BPM engine and retrieve process list. But while getting instances, it throws the exceptions on both Java Client and BPM engine side.
Thanks and Regards
Mahesh