How to resume a process instance from a loaded session in jbpm 5.0
Hi,
i ve tried to load a session from the database with the loadStatefulKnowledgeSession, and then i tried to activate a process Instance from that loaded session so i tried with ksession.startProcess(String processId) but it started a new process instance instead.
now i know that startProcess isn't the appropriate method to do that but i still don't know what's the right way ... i want to activate the persisted process instance and retrieve its state in the node which have been reached by the process instance just before it was persisted
here is my code , it s a java class:
public static void main(String[] args) {
ksession = ReloadSession(SessionId, taskname);
UserTransaction ut = null;
try {
ut = (UserTransaction) new InitialContext().lookup( "java:comp/UserTransaction" );
} catch (NamingException e1) {
e1.printStackTrace();
}
try {
ut.begin();
} catch (NotSupportedException e) {
e.printStackTrace();
} catch (SystemException e) {
e.printStackTrace();
}
processInstance = ksession.startProcess(taskname);
ksession.fireAllRules();
try {
ut.commit();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (HeuristicMixedException e) {
e.printStackTrace();
} catch (HeuristicRollbackException e) {
e.printStackTrace();
} catch (RollbackException e) {
e.printStackTrace();
} catch (SystemException e) {
e.printStackTrace();
}
}
private StatefulKnowledgeSession ReloadSession(String tasktoreloadidSession,String tasktoreloadname){
StatefulKnowledgeSession ksession =null;
try {
UserTransaction ut = (UserTransaction) new InitialContext().lookup( "java:comp/UserTransaction" );
ut.begin();
ksession = JbpmAPIUtil.loadStatefulKnowledgeSession(Integer.parseInt(tasktoreloadidSession), tasktoreloadname+".bpmn");
/*Create the knowledge base */
KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory.newThreadedFileLogger(ksession, "testlog", 1000);
CommandBasedWSHumanTaskHandler taskHandler = new CommandBasedWSHumanTaskHandler(ksession);
ksession.getWorkItemManager().registerWorkItemHandler("Human Task", taskHandler);
taskHandler.connect();
ut.commit();
logger.close();
} catch (Throwable t) {
log.error(t.getMessage(), t.getCause());
throw new RuntimeException("error while reloading session",t);
}
return ksession;
}
public static StatefulKnowledgeSession loadStatefulKnowledgeSession(int idsession,String processName) throws Exception {
/*
* Create the knowledgebase using the required bpmn and drl files
*/
KnowledgeBase kbase = readKnowledgeBase(processName);
EntityManagerFactory emf = Persistence.createEntityManagerFactory( "org.jbpm.persistence.jpa" );
Environment env = KnowledgeBaseFactory.newEnvironment();
env.set( EnvironmentName.ENTITY_MANAGER_FACTORY, emf );
env.set( EnvironmentName.TRANSACTION_MANAGER, TransactionManagerServices.getTransactionManager() );
env.set( EnvironmentName.GLOBALS, new MapGlobalResolver() );
Properties properties = new Properties();
properties.put("drools.processInstanceManagerFactory", "org.jbpm.persistence.processinstance.JPAProcessInstanceManagerFactory");
properties.put("drools.processSignalManagerFactory", "org.jbpm.persistence.processinstance.JPASignalManagerFactory");
KnowledgeSessionConfiguration config = KnowledgeBaseFactory.newKnowledgeSessionConfiguration(properties);
return JPAKnowledgeService.loadStatefulKnowledgeSession(idsession,kbase, config, env);
}
unfortunatelly, the user guide do not talk about this enough. i need your help please !!