Jack Q tao [http://community.jboss.org/people/qintao1203] created the discussion
"How to setVariable after JPAKnowledgeService.loadStatefulKnowledgeSession" To view the discussion, visit: http://community.jboss.org/message/636928#636928 -------------------------------------------------------------- Hi all, I write some code to change variables of process , but it can't work . The error info: 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 org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.setVariable(WorkflowProcessInstanceImpl.java:237) My code : KnowledgeBase kbase = createKnowledgeBase(); StatefulKnowledgeSession ksession =JPAKnowledgeService.loadStatefulKnowledgeSession(jbpm.getSessionId(), kbase, null, getEnv() ); CommanWSHumanTaskHandler humanTaskHandler = new CommanWSHumanTaskHandler(ksession); humanTaskHandler.setClient(taskClientWrapper.getTaskClient()); humanTaskHandler.setSessionId(ksession.getId()); ksession.getWorkItemManager().registerWorkItemHandler("Human Task", humanTaskHandler); humanTaskHandler.connect(); ProcessInstance pi = ksession.getProcessInstance(jbpm.getProcessId()); Boolean isSign = (Boolean) ((WorkflowProcessInstance)pi).getVariable("isSign"); List<String> list = (List<String>) ((WorkflowProcessInstance)pi).getVariable("signers"); // *isSign* and *list* are not null*.* ((WorkflowProcessInstance)pi).setVariable("isSign", true); // throws exception ((WorkflowProcessInstance)pi).setVariable("signers", signers); ksession.insert(pi); I don't understand why. and How to fix it. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/636928#636928] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2034]
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