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Re: Getting process instance variables
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created by <a href="https://community.jboss.org/people/jnorris">jnorris</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/754264#754264">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi Maciej,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>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.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Here's the code:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>org.jbpm.process.instance.ProcessInstance processInstance = (org.jbpm.process.instance.ProcessInstance) ksession.getProcessInstance( processInstanceId );</p><p>VariableScopeInstance variableScope = (VariableScopeInstance) processInstance.getContextInstance(VariableScope.VARIABLE_SCOPE);</p><p>Map<String, Object> variables = variableScope.getVariables();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Here's the stacktrace:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>2012-08-17 08:47:36,324 ERROR [ProcessInstanceProviderJbpm] (http-127.0.0.1-8080-1) ProcessInstanceProviderJbpm.getProcessDefinitionInstance() - Exception!</p><p>java.lang.NullPointerException</p><p>          at org.jbpm.process.instance.impl.ProcessInstanceImpl.getProcess(ProcessInstanceImpl.java:67)</p><p>          at org.jbpm.process.instance.impl.ProcessInstanceImpl.getContextInstance(ProcessInstanceImpl.java:127)</p><p>          at com.pb.keystone.bpm.provider.jbpm.ProcessInstanceProviderJbpm.getProcessDefinitionInstance(ProcessInstanceProviderJbpm.java:218)</p><p>          at com.pb.keystone.bpm.BPMServiceImpl.getProcessInstance(BPMServiceImpl.java:569)</p><p>          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)</p><p>          at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)</p><p>          at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)</p><p>          at java.lang.reflect.Method.invoke(Unknown Source)</p><p>          at org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:173)</p><p>          at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:89)</p><p>          at org.apache.cxf.jaxws.JAXWSMethodInvoker.invoke(JAXWSMethodInvoker.java:60)</p><p>          at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:75)</p><p>          at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:58)</p><p>          at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)</p><p>          at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)</p><p>          at java.util.concurrent.FutureTask.run(Unknown Source)</p><p>          at org.apache.cxf.workqueue.SynchronousExecutor.execute(SynchronousExecutor.java:37)</p><p>          at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:106)</p><p>          at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:243)</p><p>          at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:111)</p><p>          at org.apache.cxf.transport.servlet.ServletDestination.invoke(ServletDestination.java:99)</p><p>          at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:431)</p><p>          at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:186)</p><p>          at org.apache.cxf.transport.servlet.AbstractCXFServlet.invoke(AbstractCXFServlet.java:148)</p><p>          at org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:179)</p><p>          at org.apache.cxf.transport.servlet.AbstractHTTPServlet.doPost(AbstractHTTPServlet.java:103)</p><p>          at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)</p><p>          at org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:159)</p><p>          at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)</p><p>          at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)</p><p>          at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)</p><p>          at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)</p><p>          at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)</p><p>          at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)</p><p>          at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)</p><p>          at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:183)</p><p>          at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:95)</p><p>          at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)</p><p>          at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)</p><p>          at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)</p><p>          at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)</p><p>          at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)</p><p>          at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)</p><p>          at org.jboss.web.tomcat.service.request.ActiveRequestResponseCacheValve.internalProcess(ActiveRequestResponseCacheValve.java:74)</p><p>          at org.jboss.web.tomcat.service.request.ActiveRequestResponseCacheValve.invoke(ActiveRequestResponseCacheValve.java:47)</p><p>          at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)</p><p>          at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)</p><p>          at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:599)</p><p>          at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:451)</p><p>          at java.lang.Thread.run(Unknown Source)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Regards,</p><p>Jim</p></div>
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