[jBPM] - Proposed temporary and limited approach to supporting excluded owners
by jemmerling
jemmerling [https://community.jboss.org/people/jemmerling] created the discussion
"Proposed temporary and limited approach to supporting excluded owners"
To view the discussion, visit: https://community.jboss.org/message/646719#646719
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I have been looking at way to do the following within jBPM:
Have a node in a process definition be associated with a particular group (or groups), however due to the history of a given process, to exclude some actor(s) who might be members of that group.
Now the WS-HumanTask specification supports something called excluded owners. Here is a snippet from one version of this specification (not certain if it is the latest one):
+"Potential owners of a task are persons who receive the task so that they can claim and complete it. A potential owner becomes the actual owner of a task by explicitly claiming it. Before the task has been claimed, potential owners can influence the progress of the task, for example by changing the priority of the task, adding ad-hoc attachments or comments. All excluded owners are implicitly removed from the set of potential owners. A WS-HumanTask Definition MAY define assignment for this generic human role.+
+Excluded owners are are people who cannot become an actual or potential owner and thus they cannot reserve or start the task. A WS-HumanTask Definition MAY define assignment for this generic human role. "+
Although the jBPM5 schema supports the existence of excluded owners, I have seen no explicit mechanism to support this when developing an application. If there is something I am missing, please point this out.
In the meantime, I can see a way that a developer could add this functionality without the need to directly modify jBPM5, using the following approach. I would like to know whether it is believed this would work. I am not completely comfortable with this for reasons I will give (although these reasons should be more or less obvious):
1.) First, define a new work item parameter (or analogous mechanism) that represents users who will be excluded from the next node. Let's assume we can correctly identify the next node.
2.) Create a class that extends WSHumanTaskHandler. This class will override the executeWorkItem method. This method will populate excluded owners in the people assignments from having inspected the new parameter. It will otherwise be the same as the method it overrides except for this one additional logic step.
3.) Replace the existing Taskorm.xml with a modified version in which the TasksAssignedAsPotentialOwnerByGroup named query (and possibly some similar named queries) is modified so that excluded owners are not able to claim the task.
I believe all the above is feasible because a.) there is nothing to stop the developer from extending WSHumanTaskHandler in the described manner, and using it in the application code and b.) the ORM file is specified in persistence.xml which is a developer-configurable file, so the developer should be at liberty to specify a different file. So all this could be done without "hacking" jBPM directly.
However I am uncomfortable with this approach because the overridden executeWorkItem method as well as the replacement ORM file would be created using a copy-and-paste methodology so that when progressing to a later version of jBPM it would be necessary to modify these to reflect the original logic.
Nevertheless, if there is some intention to support this type of functionality in a future release of jBPM (and assuming I am right to conclude it is not currently supported) this might be a justifiable short-term solution.
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11 years, 5 months
[jBPM] - Re: I18NText with Oracle
by Diego Leal
Diego Leal [https://community.jboss.org/people/diegoasth] created the discussion
"Re: I18NText with Oracle"
To view the discussion, visit: https://community.jboss.org/message/646747#646747
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Hello
I have a similar problem with this field. When i´m running over the in-memory database, and try to complete a Human task everything works fine, but when i´m running over Oracle, I got the following exception. Dou you have any clue? Or did you have a similar problem? Thx
Diego
19:32:42,984 INFO [STDOUT] 19:32:42,984 WARN [LoggingFilter] EXCEPTION :
org.apache.mina.filter.codec.ProtocolEncoderException: java.lang.NullPointerException
at org.apache.mina.filter.codec.ProtocolCodecFilter.filterWrite(ProtocolCodecFilter.java:355)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callPreviousFilterWrite(DefaultIoFilterChain.java:509)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1400(DefaultIoFilterChain.java:46)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.filterWrite(DefaultIoFilterChain.java:808)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.filterWrite(DefaultIoFilterChain.java:734)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callPreviousFilterWrite(DefaultIoFilterChain.java:509)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireFilterWrite(DefaultIoFilterChain.java:501)
at org.apache.mina.core.session.AbstractIoSession.write(AbstractIoSession.java:490)
at org.apache.mina.core.session.AbstractIoSession.write(AbstractIoSession.java:435)
at org.jbpm.task.service.mina.MinaSessionWriter.write(MinaSessionWriter.java:31)
at org.jbpm.task.service.TaskServerHandler.messageReceived(TaskServerHandler.java:101)
at org.jbpm.task.service.mina.MinaTaskServerHandler.messageReceived(MinaTaskServerHandler.java:41)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:716)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:46)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:796)
at org.apache.mina.filter.codec.ProtocolCodecFilter$ProtocolDecoderOutputImpl.flush(ProtocolCodecFilter.java:427)
at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:245)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:46)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:796)
at org.apache.mina.filter.logging.LoggingFilter.messageReceived(LoggingFilter.java:177)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:46)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:796)
at org.apache.mina.core.filterchain.IoFilterAdapter.messageReceived(IoFilterAdapter.java:119)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:426)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:692)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:645)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:634)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:66)
at org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:1078)
at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.NullPointerException
at java.io.ObjectOutputStream$BlockDataOutputStream.getUTFLength(ObjectOutputStream.java:2106)
at java.io.ObjectOutputStream$BlockDataOutputStream.writeUTF(ObjectOutputStream.java:1977)
at java.io.ObjectOutputStream.writeUTF(ObjectOutputStream.java:849)
at org.jbpm.task.I18NText.writeExternal(I18NText.java:49)
at org.jbpm.task.utils.CollectionUtils.writeI18NTextList(CollectionUtils.java:235)
at org.jbpm.task.Task.writeExternal(Task.java:93)
at java.io.ObjectOutputStream.writeExternalData(ObjectOutputStream.java:1429)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1398)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
at java.util.ArrayList.writeObject(ArrayList.java:570)
at sun.reflect.GeneratedMethodAccessor272.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
at org.apache.mina.core.buffer.AbstractIoBuffer.putObject(AbstractIoBuffer.java:2011)
at org.apache.mina.filter.codec.serialization.ObjectSerializationEncoder.encode(ObjectSerializationEncoder.java:80)
at org.apache.mina.filter.codec.ProtocolCodecFilter.filterWrite(ProtocolCodecFilter.java:322)
... 36 more
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11 years, 7 months
[jBPM] - Connection TimeOut while getting assigned tasks
by Prashanth Karnam
Prashanth Karnam [https://community.jboss.org/people/pras_karnam] created the discussion
"Connection TimeOut while getting assigned tasks"
To view the discussion, visit: https://community.jboss.org/message/648811#648811
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Hi All,
We are using the BlockingSummaryTaskHandler to get assigned tasks and we are getting the following timeout errors while fetching results.This is very critical , can anyone please help on this
48322772 26/01 08:27:43,710[http-8082-7] INFO emirates.sds.wf.exit - Exit [CTaskClient] CTaskClient method
Hibernate: select task0_.id as col_0_0_, task0_.processInstanceId as col_1_0_, names5_.text as col_2_0_, subjects3_.text as col_3_0_, descriptio4_.text as col_4_0_, task0_.status as col_5_0_, task0_.priority as col_6_0_, task0_.skipable as col_7_0_, task0_.actualOwner_id as col_8_0_, task0_.createdBy_id as col_9_0_, task0_.createdOn as col_10_0_, task0_.activationTime as col_11_0_, task0_.expirationTime as col_12_0_, task0_.processId as col_13_0_, task0_.processSessionId as col_14_0_ from Task task0_ left outer join OrganizationalEntity user1_ on task0_.createdBy_id=user1_.id left outer join OrganizationalEntity user2_ on task0_.actualOwner_id=user2_.id left outer join I18NText subjects3_ on task0_.id=subjects3_.Task_Subjects_Id left outer join I18NText descriptio4_ on task0_.id=descriptio4_.Task_Descriptions_Id left outer join I18NText names5_ on task0_.id=names5_.Task_Names_Id, OrganizationalEntity organizati6_ where organizati6_.id=? and (organizati6_.id in (select potentialo9_.entity_id from PeopleAssignments_PotOwners potentialo9_ where task0_.id=potentialo9_.task_id)) and (names5_.language=? or (select count(names10_.Task_Names_Id) from I18NText names10_ where task0_.id=names10_.Task_Names_Id)=0) and (subjects3_.language=? or (select count(subjects11_.Task_Subjects_Id) from I18NText subjects11_ where task0_.id=subjects11_.Task_Subjects_Id)=0) and (descriptio4_.language=? or (select count(descriptio12_.Task_Descriptions_Id) from I18NText descriptio12_ where task0_.id=descriptio12_.Task_Descriptions_Id)=0) and (task0_.expirationTime is null)
48332776 26/01 08:27:53,714[http-8082-7] ERROR emirates.sds.wf.error - [CWorkflowDesignerMBean] method : getAssignedTasks:*Timeout : unable to retrieve results trace : java.lang.RuntimeException: Timeout : unable to retrieve results*
1. *java.lang.RuntimeException: Timeout : unable to retrieve results*
at org.jbpm.task.service.responsehandlers.BlockingTaskSummaryResponseHandler.getResults(BlockingTaskSummaryResponseHandler.java:41)
at com.emirates.sds.workflow.mbean.CWorkflowDesignerMBean.getAssignedTasks(CWorkflowDesignerMBean.java:1592)
at com.emirates.sds.workflow.mbean.CWorkflowDesignerMBean.getTasks(CWorkflowDesignerMBean.java:2921)
at sun.reflect.GeneratedMethodAccessor112.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at javax.el.BeanELResolver.getValue(BeanELResolver.java:62)
at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:54)
at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:71)
at org.apache.el.parser.AstValue.getValue(AstValue.java:118)
at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71)
at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:190)
at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:178)
at javax.faces.component.UIData.getValue(UIData.java:554)
at org.ajax4jsf.component.UIDataAdaptorBase.getValue(UIDataAdaptorBase.java:1647)
at org.ajax4jsf.component.SequenceDataAdaptor.getDataModel(SequenceDataAdaptor.java:65)
at org.richfaces.component.UIExtendedDataTable.resetDataModel(UIExtendedDataTable.java:390)
at org.ajax4jsf.component.UIDataAdaptorBase.beforeRenderResponse(UIDataAdaptorBase.java:1656)
at org.richfaces.component.UIExtendedDataTable.beforeRenderResponse(UIExtendedDataTable.java:417)
at org.ajax4jsf.component.RenderPhaseUIDataAdaptorVisitor.beforeComponent(RenderPhaseUIDataAdaptorVisitor.java:44)
at org.richfaces.event.RenderPhaseComponentListener.processComponents(RenderPhaseComponentListener.java:47)
at org.richfaces.event.RenderPhaseComponentListener.processComponents(RenderPhaseComponentListener.java:55)
at org.richfaces.event.RenderPhaseComponentListener.processComponents(RenderPhaseComponentListener.java:55)
at org.richfaces.event.RenderPhaseComponentListener.processComponents(RenderPhaseComponentListener.java:55)
at org.richfaces.event.RenderPhaseComponentListener.beforePhase(RenderPhaseComponentListener.java:71)
at org.ajax4jsf.component.AjaxViewRoot.processPhaseListeners(AjaxViewRoot.java:188)
at org.ajax4jsf.component.AjaxViewRoot.encodeBegin(AjaxViewRoot.java:510)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1641)
at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592)
at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)
at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:117)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:97)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:135)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:309)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:206)
at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388)
at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:349)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Thread.java:662)
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11 years, 9 months
[jBPM] - JBPM 5.2 console can't get any Guvnor Process Definition
by Rogelio Di Pasquale
Rogelio Di Pasquale [https://community.jboss.org/people/roger0681] created the discussion
"JBPM 5.2 console can't get any Guvnor Process Definition"
To view the discussion, visit: https://community.jboss.org/message/646993#646993
--------------------------------------------------------------
I'm using
jbpm-5.2.0.Final
jbpm-5.2.0.Final-gwt-console
guvnor-distribution-wars-5.3.1.Final
on
jboss-as-7.0.1
I could create process definitions in Eclipse, add them to Guvnor, build the package, create snapshots, etc. But when trying to see process definitions in jbpm-console, I just see nothing.
If I try using the rest api ( http://127.0.0.1:8080/gwt-console-server/rs/process/definitions http://127.0.0.1:8080/gwt-console-server/rs/process/definitions), I get:
{"definitions":[]}
(and JBoss logs says that parsed 0 process definitions).
I've made several packages in Guvnor, and jbpm-console seems to be trying to parse processes from all of them, but keeps saying he got 0 processes to parse.
Here I upload a list of assets obtained from the Guvnor's rest api ( http://127.0.0.1:8080/drools-guvnor/rest/packages/defaultPackage/assets http://127.0.0.1:8080/drools-guvnor/rest/packages/defaultPackage/assets).
Should jbpm-console see any process? What does a process definition look like in the rest API when it is parseable by jbpm-console?
Thanks a lot,
Roger
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11 years, 10 months
[jBPM] - signal event doesn't work from REST API
by Rudi Fisher
Rudi Fisher [https://community.jboss.org/people/rudi_fisher] created the discussion
"signal event doesn't work from REST API"
To view the discussion, visit: https://community.jboss.org/message/649256#649256
--------------------------------------------------------------
I want to use REST API to call signal. There is some implementation in ProcessMgmtFacade of gwt-console-server for this. I see the source code and I finelly found this in CommandDelegate of jbpm-gwt-core:
public void signalExecution(String executionId, String signal) {
ksession.getProcessInstance(new Long(executionId)).signalEvent("signal", signal);
}
This doesn't fulfil my requirements so I made changes to this class recompile and redeploy. This step is OK, because I made some other changes about this REST API (start process with params) and everythings work fins, so I think the problem is not in this my changed implementation of CommandDelegate. New implementation is:
public void signalExecution(String executionId, String eventType, String eventValue) {
ksession.getProcessInstance(new Long(executionId)).signalEvent(eventType, eventValue);
}
I took example of signal event from original examples to be sure that process is designed OK. I took BPMN2-EventBasedSplit.bpmn2. I tested in Eclipse and works fine - after signal call, process cointinued and finally finished. I deployed this process into my Guvnor repo and started by GWT console. Process stopped and waits at signal nodes (see attached picture).
https://community.jboss.org/servlet/JiveServlet/showImage/2-649256-17846/... https://community.jboss.org/servlet/JiveServlet/downloadImage/2-649256-17...
At this point I wanted to push process by send signal event by REST API with new implementation. Method signalExecution in CommandDelegate is called OK and this method take correct process instance (I have log line there to see process instance). But it seems signalEvent on process instance doesn't work. I'm using the same parameters for signal event in Eclipse and in CommandDelegate. I'm confused about what is different between execution in unit test in Eclipse and at server. I made many tests and examples but my probem has no solution to this day. I found some discussion about similar issues but this not solve this problem.
Working unit test in Eclipse
public static final void main(String[] args) throws Exception {
// load up the knowledge base
KnowledgeBase kbase = readKnowledgeBase();
StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
ProcessInstance processInstance = ksession.startProcess("com.sample.test");
System.out.println("process instance:" + processInstance.getState());
ksession.signalEvent("Yes", "YesValue", processInstance.getId());
System.out.println("process instance:" + ksession.getProcessInstance(processInstance.getId()));
// NO
processInstance = ksession.startProcess("com.sample.test");
System.out.println("process instance:" + processInstance.getState());
//ksession = restoreSession(ksession, true);
ksession.signalEvent("No", "NoValue", processInstance.getId());
System.out.println("process instance:" + ksession.getProcessInstance(processInstance.getId()));
}
private static KnowledgeBase readKnowledgeBase() throws Exception {
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(ResourceFactory.newClassPathResource("BPMN2-EventBasedSplit.bpmn2"), ResourceType.BPMN2);
return kbuilder.newKnowledgeBase();
}
Not working code in CommandDelegate and calling at GWT server
ksession.getProcessInstance(new Long(executionId)).signalEvent("Yes", "YesValue");
For BPMN2-EventBasedSplit.bpmn2 see official examples in version 5.2.0 Final
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12 years, 1 month
[jBPM] - How to define result mapping or exit action that saves task owner
by jemmerling
jemmerling [https://community.jboss.org/people/jemmerling] created the discussion
"How to define result mapping or exit action that saves task owner"
To view the discussion, visit: https://community.jboss.org/message/648536#648536
--------------------------------------------------------------
Hi,
This should be simple for any non-novice, it was suggested before however without an example.
So I have a process variable and I want a particular task to store its owner into that variable (say its name is "task2owner"). Is there an expression for that, for example:
task2owner=#{taskOwner}
So if there is a standard expression for the task owner (the above is just a guess at what it might be) then this result mapping would allow subsequent tasks to determine who owned (and completed) task2.
Failing that, I could try defining an on exit action, using kcontext I can get the node instance which I think has a one-to-one correspondence to the task, however the node instance does not seem to have an attribute that explicitly identifies the owner. Perhaps the owner is a variable?
Any suggestion would be greatly appreciated.
Thanks!
--JE
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12 years, 2 months
