All the code you require is in the jbpm-console web application source code.
That's probably where most people will learn how to interact with the Jbpm
lilbraries.
For example, here is a method in one of my action classes, which shows how I
start a process in my own web application:
public ActionForward startProcess(ActionMapping mapping, ActionForm form,
| HttpServletRequest request,
| HttpServletResponse response)
| throws Exception {
| if (log.isDebugEnabled()) {
| log.debug("Entering 'startProcess' method");
| }
| User currentUser = getUser(request);
| String processDefinitionIdStr =
request.getParameter("processDefinitionId");
| long processDefinitionId =
Long.parseLong(processDefinitionIdStr);
| jbpmContext.setActorId(currentUser.getUsername());
| GraphSession graphSession = jbpmContext.getGraphSession();
| ProcessDefinition processDefinition =
graphSession.getProcessDefinition(processDefinitionId);
| ProcessInstance processInstance =
processDefinition.createProcessInstance();
| // Signal the root token based on the following criteria:
| // 1. If there is no start task, and
| // 2. If the root token is still at the start state, and
| // 3. If the start state has a default leaving transition, then
| // signal the token along the default transition.
| TaskMgmtInstance taskMgmtInstance =
processInstance.getTaskMgmtInstance();
| //set the current user as the initiator
|
processInstance.getContextInstance().setVariable("sys_initiator",
currentUser.getUsername());
| TaskInstance startTaskInstance =
taskMgmtInstance.createStartTaskInstance();
| if (startTaskInstance == null) {
| // There is no start task
| Node initialNode = processDefinition.getStartState();
| Token rootToken = processInstance.getRootToken();
| Node rootTokenNode = rootToken.getNode();
| if (initialNode.getId() == rootTokenNode.getId()) {
| // The root token is still at the start node
| Transition defaultLeavingTransition =
initialNode.getDefaultLeavingTransition();
| if (defaultLeavingTransition != null) {
| // There's a default transition
|
rootToken.signal(defaultLeavingTransition);
| System.out.println("Signalled Root
Token");
| }
| }
| }
| System.out.println("Started");
| if (processInstance.hasEnded()) {
| System.out.println("Finished");
| }
| // Nothing else saves the process, so we must
| jbpmContext.save(processInstance);
|
| return mapping.findForward("myTasks");
| }
And guess what, if I remember correctly, that was taken almost exactly as it
from the jbpm-console webapp source code. So take a look there if you need help.
Good luck!
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