Maciej Swiderski [https://community.jboss.org/people/swiderski.maciej] created the discussion "Re: Getting process instance variables" To view the discussion, visit: https://community.jboss.org/message/754247#754247 -------------------------------------------------------------- Try casting ksession.getProcessInstance() to org.jbpm.process.instance.ProcessInstance as it should implement it so you will have access to the context instance. HTH -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/754247#754247] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]

jnorris [https://community.jboss.org/people/jnorris] created the discussion "Re: Getting process instance variables" To view the discussion, visit: https://community.jboss.org/message/754252#754252 -------------------------------------------------------------- Hi Maciej, I tried casting to org.jbpm.process.instance.ProcessInstance as suggested and used the code suggested in the other post.  However this line causes a null pointer exception: | | | | VariableScopeInstance variableScope = (VariableScopeInstance) processInstance.getContextInstance(VariableScope.VARIABLE_SCOPE); | Casting to RuleFlowProcessInstance works. Regards, Jim -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/754252#754252] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]

jnorris [https://community.jboss.org/people/jnorris] created the discussion "Re: Getting process instance variables" To view the discussion, visit: https://community.jboss.org/message/754264#754264 -------------------------------------------------------------- Hi Maciej, Yes we are using persistence.  The api call to start a process and the call to get a process instance take place in seperate web service calls. Here's the code: org.jbpm.process.instance.ProcessInstance processInstance = (org.jbpm.process.instance.ProcessInstance) ksession.getProcessInstance( processInstanceId ); VariableScopeInstance variableScope = (VariableScopeInstance) processInstance.getContextInstance(VariableScope.VARIABLE_SCOPE); Map<String, Object> variables = variableScope.getVariables(); Here's the stacktrace: 2012-08-17 08:47:36,324 ERROR [ProcessInstanceProviderJbpm] (http-127.0.0.1-8080-1) ProcessInstanceProviderJbpm.getProcessDefinitionInstance() - Exception! java.lang.NullPointerException           at org.jbpm.process.instance.impl.ProcessInstanceImpl.getProcess(ProcessInstanceImpl.java:67)           at org.jbpm.process.instance.impl.ProcessInstanceImpl.getContextInstance(ProcessInstanceImpl.java:127)           at com.pb.keystone.bpm.provider.jbpm.ProcessInstanceProviderJbpm.getProcessDefinitionInstance(ProcessInstanceProviderJbpm.java:218)           at com.pb.keystone.bpm.BPMServiceImpl.getProcessInstance(BPMServiceImpl.java:569)           at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)           at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)           at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)           at java.lang.reflect.Method.invoke(Unknown Source)           at org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:173)           at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:89)           at org.apache.cxf.jaxws.JAXWSMethodInvoker.invoke(JAXWSMethodInvoker.java:60)           at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:75)           at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:58)           at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)           at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)           at java.util.concurrent.FutureTask.run(Unknown Source)           at org.apache.cxf.workqueue.SynchronousExecutor.execute(SynchronousExecutor.java:37)           at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:106)           at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:243)           at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:111)           at org.apache.cxf.transport.servlet.ServletDestination.invoke(ServletDestination.java:99)           at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:431)           at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:186)           at org.apache.cxf.transport.servlet.AbstractCXFServlet.invoke(AbstractCXFServlet.java:148)           at org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:179)           at org.apache.cxf.transport.servlet.AbstractHTTPServlet.doPost(AbstractHTTPServlet.java:103)           at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)           at org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:159)           at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)           at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)           at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)           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:235)           at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)           at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:183)           at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:95)           at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)           at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)           at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)           at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)           at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)           at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)           at org.jboss.web.tomcat.service.request.ActiveRequestResponseCacheValve.internalProcess(ActiveRequestResponseCacheValve.java:74)           at org.jboss.web.tomcat.service.request.ActiveRequestResponseCacheValve.invoke(ActiveRequestResponseCacheValve.java:47)           at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)           at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)           at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:599)           at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:451)           at java.lang.Thread.run(Unknown Source) Regards, Jim -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/754264#754264] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]

jnorris [https://community.jboss.org/people/jnorris] created the discussion "Re: Getting process instance variables" To view the discussion, visit: https://community.jboss.org/message/754279#754279 -------------------------------------------------------------- Hi Maciej, I tried your suggestion and it works and is a better solution than casting to an implementation. Thank you for your help, Jim -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/754279#754279] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]

Maciej Swiderski [https://community.jboss.org/people/swiderski.maciej] created the discussion "Re: Getting process instance variables" To view the discussion, visit: https://community.jboss.org/message/783455#783455 -------------------------------------------------------------- Eric, it is due to processinstance is disconnected from the runtime on transaction end so it removes some state related information and one of them is process definition. When enclosing it in command you ensure it will be executed within anther transaction and process instance will be reconnected with the runtime HTH -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/783455#783455] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]

Sandra Renaud [https://community.jboss.org/people/joploya] created the discussion "Re: Getting process instance variables" To view the discussion, visit: https://community.jboss.org/message/804237#804237 -------------------------------------------------------------- Hello, I try this solution to retrieve processInstance varaibles but I got a NullPointerException. Before I tried this solution : https://community.jboss.org/message/798123#798123 https://community.jboss.org/message/798123 without success. Eric how can you do to have a not null processInstance please? Here my code : /**            * This method allow to access object store in            * process instance variables            * @return an object link to the processInstance            */           public Object getProcessVariable(Long processInstanceId, Long taskId, String key){                     final Long piId = processInstanceId;                     Object retObj = null;                     WorkflowProcessInstance wpi = (WorkflowProcessInstance)kSession.getProcessInstance(processInstanceId);                     if((wpi == null) || (wpi.getVariable(key) == null)){                               //method1 : retrieve content map variables                               Task task = getTaskService().getTask(taskId);                               TaskData tData = task.getTaskData();                               Long docContentId = tData.getDocumentContentId();                               System.out.println("process instance is null, doc contentId = "+docContentId);                               Content content = getTaskService().getContent(docContentId);                               Map<?, ?> variables = ((Map<?, ?>) ContentMarshallerHelper.unmarshall(content.getContent(), null));                               //display keys                               System.out.println("content map keys :");                               for(Object o : variables.keySet()){                                         System.out.println(o.toString());                               }                               System.out.println("and key search is "+key);                               /*                               content map keys :                                         ActorId                                         Skippable                                         TaskName                                         GroupId                               key search is formId                               */                               retObj = variables.get(key);                               //method 2 : retrieve the the variable Scope                               Map<String, Object> variables2 = kSession.execute(new GenericCommand<Map<String, Object>>(){                                         @Override                                         public Map<String, Object> execute(Context context) {                                                   StatefulKnowledgeSession ksession = ((KnowledgeCommandContext) context).getStatefulKnowledgesession();                                                   ProcessInstanceImpl processInstance = (ProcessInstanceImpl) ksession.getProcessInstance(piId);                                                   VariableScopeInstance variableScope = (VariableScopeInstance) processInstance.getContextInstance(VariableScope.VARIABLE_SCOPE); // ==> NullPointerException                                                   Map<String, Object> variables = variableScope.getVariables();                                                   return variables;                                         }                               });                               //display keys                               System.out.println("variables keys :");                               for(Object o : variables2.keySet()){                                         System.out.println(o.toString());                               }                               System.out.println("key search is "+key);                               retObj = variables2.get(key);                     }else{                               retObj = wpi.getVariable(key);                     }                     return retObj;           } Thanks and Best Regards. -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/804237#804237] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]