August 2013 - jboss-user - Jboss List Archives

[jBPM] - LocalTaskService keep using one Entity Manager, Breaks when Database is Restarted

by Thomas Setiabudi

Thomas Setiabudi [https://community.jboss.org/people/thomas.setiabudi] created the discussion "LocalTaskService keep using one Entity Manager, Breaks when Database is Restarted" To view the discussion, visit: https://community.jboss.org/message/832416#832416 -------------------------------------------------------------- Hi, This is similar post to https://community.jboss.org/thread/231488?tstart=0 https://community.jboss.org/thread/231488?tstart=0 Only that it discuss about LocalTaskService here I use JBPM5.4.Final, and Drools-Spring 5.4.Final in a Web Application. I create Stateful Knowledge Session and LocalTaskService in the Spring config file, they are created once for the rest of the web application life. Everything works fine, until the Database Server, MS SQL Server 2008, is restarted. Which then break the Stateful Knowledge Session and LocalTaskService. After looking at the LocalTaskService code here https://github.com/droolsjbpm/jbpm/blob/5.4.x/jbpm-human-task/jbpm-human-... https://github.com/droolsjbpm/jbpm/blob/5.4.x/jbpm-human-task/jbpm-human-... Local Task Service has TaskServiceSession and then TaskServiceSession has TaskPersistenceManager which contain an EntityManager. The problem is this EntityManager is acquired from EntityManagerFactory just exactly once. when the database connection is no longer valid (Because of Database Server restart), it will still use the same EntityManager which will of course throw exception. My question is, is it a bug? or I use these LocalTaskService Wrongly? Currently, to keep my application running, I create another class that implements TaskService, and have all the code just like LocalTaskService, the difference is I add a check before doing anything about the task. This is a sample code: public void addTask(Task task, ContentData content) { checkEntityManagerFactory(); session.addTask(task, content); } and the checkEntityManagerFactory() implementation: public void checkEntityManagerFactory() { if (session != null) { try { Query query = session.getTaskPersistenceManager() .createNewQuery("SELECT 1 FROM Task WHERE id = 0 "); query.getResultList(); } catch (Throwable e) { session = service.createSession(); } } else { session = service.createSession(); } } execute simple select query, when that query throws exception, that means its time to get new EntityManager which in this case is create new TaskServiceSession. Is it the correct way to do this? Will this issue fixed in JBPM 6 ? Any help is appreciated. Regards, Thomas Setiabudi -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/832416#832416] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&con...]

12 years, 8 months

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[jBPM] - jbpm and spring integration problem

by dalsingar yadav

dalsingar yadav [https://community.jboss.org/people/diyyadav] created the discussion "jbpm and spring integration problem" To view the discussion, visit: https://community.jboss.org/message/832432#832432 -------------------------------------------------------------- When i am following the givne sample program on site https://github.com/mswiderski/jbpm-examples/tree/master/jbpm-spring-web https://github.com/mswiderski/jbpm-examples/tree/master/jbpm-spring-web for integrating spring with jbpm i am getting following errors: org.springframework.transaction.IllegalTransactionStateException: Transaction is already completed - do not call commit or rollback more than once per transaction please help me. Thanks Dal Singar Yadav -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/832432#832432] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&con...]

12 years, 8 months

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[jBPM] - Can we use JBPM Simulation Programmatically? And Can we do simulation based on current data?

by Thomas Setiabudi

Thomas Setiabudi [https://community.jboss.org/people/thomas.setiabudi] created the discussion "Can we use JBPM Simulation Programmatically? And Can we do simulation based on current data?" To view the discussion, visit: https://community.jboss.org/message/830817#830817 -------------------------------------------------------------- Hi, I use JBPM5.4.Final. The designer that comes with the JBPM5.4.Final full installer does support simulation. I wonder is it possible to use JBPM Simulation Programatically? And also, can we do simulation based on the current process instance data? The reason I need this is because a process definition can have multiple possible path, so presenting a process diagram to user with added info about the available path after the currently active task maybe will add more value for the user. Regards, Thomas Setiabudi -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/830817#830817] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&con...]

12 years, 8 months

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[jBPM] - DroolsSpringJpaManager breaks when Database Server is restarted, how to handle it?

by Thomas Setiabudi

Thomas Setiabudi [https://community.jboss.org/people/thomas.setiabudi] created the discussion "DroolsSpringJpaManager breaks when Database Server is restarted, how to handle it?" To view the discussion, visit: https://community.jboss.org/message/832415#832415 -------------------------------------------------------------- Hi, I use JBPM5.4.Final, and Drools-Spring 5.4.Final in a Web Application. I create Stateful Knowledge Session and LocalTaskService in the Spring config file, they are created once for the rest of the web application life. Everything works fine, until the Database Server, MS SQL Server 2008, is restarted. Which then break the Stateful Knowledge Session and LocalTaskService. After looking into the code, I found that when we declare Stateful Knowledge Session like this: <drools-spring:ksession id="ksession1" type="stateful" kbase="kbase1"> <drools-spring:configuration> <drools-spring:jpa-persistence> <drools-spring:transaction-manager ref="transactionManager" /> <drools-spring:entity-manager-factory ref="entityManagerFactory" /> </drools-spring:jpa-persistence> </drools-spring:configuration> </drools-spring:ksession> Eventhough we give it EntityManagerFactory, the code inside DroolsSpringJpaManager will try to get EntityManager just once this is how the code looks inside org.drools.container.spring.beans.persistence.DroolsSpringJpaManager: https://github.com/droolsjbpm/droolsjbpm-integration/blob/5.5.x/drools-co... https://github.com/droolsjbpm/droolsjbpm-integration/blob/5.5.x/drools-co... Look at the implementation of getApplicationScopedPersistenceContext starting from line 64 The problem with this implementation is EntityManagerFactory used exactly just one time to get an EntityManager, even when the database connection is no longer valid, it will still use the same EntityManager which will of course throw exception. My question is, is it a bug? or I use these Stateful Knowledge Session Wrongly? Currently, to keep my application running, I modified DroolsSpringJpaManager at getApplicationScopedPersistenceContext(): If the appScopedEntityManager is not null, then execute simple select query, when that query throws exception, that means its time to get new EntityManager from the EntityManagerFactory. It may be an ugly fix, but thats why I need to clarify this issue. here is the code: public PersistenceContext getApplicationScopedPersistenceContext() { boolean refreshEntityManager = false; if (this.appScopedEntityManager != null) { try { Query query = this.appScopedEntityManager .createQuery("SELECT 1 FROM Task WHERE id = 0 "); query.getResultList(); // System.out.println("Query Result: " + String.valueOf(a)); } catch (Throwable e) { // System.out.println(e.getMessage()); refreshEntityManager = true; } } if (refreshEntityManager == true) { // System.out.println("Refreshing EM...."); EntityManagerHolder emHolder = (EntityManagerHolder) TransactionSynchronizationManager .getResource(this.emf); this.appScopedEntityManager = this.emf.createEntityManager(); emHolder = new EntityManagerHolder(this.appScopedEntityManager); internalAppScopedEntityManager = true; this.env.set(EnvironmentName.APP_SCOPED_ENTITY_MANAGER, emHolder.getEntityManager()); // System.out.println("Done Refreshing EM...."); } else { if (this.appScopedEntityManager == null) { // Use the App scoped EntityManager if the user has provided it, // and // it is open. this.appScopedEntityManager = (EntityManager) this.env .get(EnvironmentName.APP_SCOPED_ENTITY_MANAGER); if (this.appScopedEntityManager != null && !this.appScopedEntityManager.isOpen()) { throw new RuntimeException( "Provided APP_SCOPED_ENTITY_MANAGER is not open"); } if (this.appScopedEntityManager == null) { EntityManagerHolder emHolder = (EntityManagerHolder) TransactionSynchronizationManager .getResource(this.emf); if (emHolder == null) { this.appScopedEntityManager = this.emf .createEntityManager(); emHolder = new EntityManagerHolder( this.appScopedEntityManager); TransactionSynchronizationManager.bindResource( this.emf, emHolder); internalAppScopedEntityManager = true; } else { this.appScopedEntityManager = emHolder .getEntityManager(); } this.env.set(EnvironmentName.APP_SCOPED_ENTITY_MANAGER, emHolder.getEntityManager()); } } if (TransactionSynchronizationManager.isActualTransactionActive() && isJTA) { this.appScopedEntityManager.joinTransaction(); } } return new JpaPersistenceContext(this.appScopedEntityManager, isJTA); } Is it the correct way to do this? Will this issue fixed in JBPM 6 ? Any help is appreciated. Regards, Thomas Setiabudi Note: Attached server log that shows: 1. the error after database is restarted and I try to call start process on the ksession. 2. the error after the first error happen and I try to call start process on the ksession again. -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/832415#832415] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&con...]

12 years, 8 months

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[IronJacamar] - Trying to create datasource, delete and then create again with same name requires sever restart

by Van Halbert

Van Halbert [https://community.jboss.org/people/van.halbert] created the discussion "Trying to create datasource, delete and then create again with same name requires sever restart" To view the discussion, visit: https://community.jboss.org/message/832328#832328 -------------------------------------------------------------- Referencing https://issues.jboss.org/browse/AS7-4776 https://issues.jboss.org/browse/AS7-4776 Teiid is having an issue with the usecase: create, delete and create again with same name The use case is driven from the Teiid Designer, which will create a datasource in order that the user can preview the data. And there are cases when the datasource will need to be removed. However, a subsequent call to recreate the datasource with the same name will be unsuccessfull unless the server is restarted. It appears the server isn't cleaning up the connection factory after the delete, hence the issue with trying to readd with the same name. Any possibility of a fix? -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/832328#832328] Start a new discussion in IronJacamar at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&con...]

12 years, 8 months

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[jBPM] - Designer - Mixed up global/input/output variables in imported processes

by Olaf Sebelin

Olaf Sebelin [https://community.jboss.org/people/osebelin] created the discussion "Designer - Mixed up global/input/output variables in imported processes" To view the discussion, visit: https://community.jboss.org/message/832094#832094 -------------------------------------------------------------- Hi, we are migrating from using the drools eclipse BPMN2 modeler to the designer 2.4 war. When I import the processes into the guvnor, edit them in the designer and save and export them they fail to execute in the drools runtime. I narrowed the problem down to global variables, data input and output variables that have the same name. They will get mixed up leading to missing <bpmn2:dataInputAssociation> elements. This is visible in the editor for data assignments for work items. If I try to map e.g. * the global variable 'acl' to the input parameter 'acl' and * the output parameter 'acl' to the global variable 'acl', they get mixed up. If I open the drop down list again, ist is always the global variable that is selected. This occurs in both the "From Object" and "To Object" drop down list. This leads to a missing <bpmn2:dataInputAssociation> for the 'acl' variable in the generated BPMN2. The <bpmn2:dataOutputAssociation> for the 'acl' output parameter gets generated correctly however. Is this an error in the designer or is it prohibited to use the same variable names, even if it was working fine in the eclipse modeler? Is there a way to work around this using the designer? Thanks Olaf -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/832094#832094] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&con...]

12 years, 8 months

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[IronJacamar] - "getConnection" returns a shared connection regardless of the sharable property in the resource reference and regardless of the connection request info

by berw

berw [https://community.jboss.org/people/berw] created the discussion ""getConnection" returns a shared connection regardless of the sharable property in the resource reference and regardless of the connection request info" To view the discussion, visit: https://community.jboss.org/message/832314#832314 -------------------------------------------------------------- Hi all, we are on our way to port our long time existing application to JBOSS 7.2 (before we used JBOSS 5 and we support WAS as well). One of the functions uses different connection instances of the same type of one JCA Connector within the same transaction. The different calls to getConnection get different connection request info objects. But even if they are different the second call to "getConnections" returns the first fetched and created connection. In this case the connection however is not sharable and is not meant to be. Does anybody have the same or similar problem? Is this really a JBOSS bug or do I use it the wrong way? Thanks for comments and best regards, Wolfgang -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/832314#832314] Start a new discussion in IronJacamar at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&con...]

12 years, 8 months

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[IronJacamar] - Re: JBoss EAP 6.1.0.Beta1 ResourceAdapter Deployed but Not Started or Associated with MCF

by Yusuf Bata

Yusuf Bata [https://community.jboss.org/people/yusufb] created the discussion "Re: JBoss EAP 6.1.0.Beta1 ResourceAdapter Deployed but Not Started or Associated with MCF" To view the discussion, visit: https://community.jboss.org/message/832259#832259 -------------------------------------------------------------- Hi Jim, Have you managed to resolve this issue? I am experiencing the same symptom with the EAP 6.1 Alpha version as well. Regards, Yusuf -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/832259#832259] Start a new discussion in IronJacamar at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&con...]

12 years, 8 months

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[Beginner's Corner] - Re: couldn't find run.sh to start jboss?

by hari krishna

hari krishna [https://community.jboss.org/people/hari790] created the discussion "Re: couldn't find run.sh to start jboss?" To view the discussion, visit: https://community.jboss.org/message/832256#832256 -------------------------------------------------------------- Thanks for your response. As i am new to Jboss,i didn't get what you posted above. could you please elaborate the issue what i am facing. -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/832256#832256] Start a new discussion in Beginner's Corner at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&con...]

12 years, 8 months

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[Beginner's Corner] - couldn't find run.sh to start jboss?

by hari krishna

hari krishna [https://community.jboss.org/people/hari790] created the discussion "couldn't find run.sh to start jboss?" To view the discussion, visit: https://community.jboss.org/message/832248#832248 -------------------------------------------------------------- Hi , I am new to Jboss and installed Jboss 4.2.3 ga src in linux machine. I could not find run.sh to start the Jboss server. Could anyone,help me out. Thanks in advance -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/832248#832248] Start a new discussion in Beginner's Corner at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&con...]

12 years, 8 months

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jboss-user August 2013