1:52 p.m.
Demian Calcaprina [http://community.jboss.org/people/calca] created the discussion
"Problem with persistence, rules & fireUntilHalt"
To view the discussion, visit: http://community.jboss.org/message/611719#611719
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Hi All,
I have simple flow like this:
Start->Ruleflow->...
And I am running it with persistence. I am running the process in this way:
ProcessInstance process = session.createProcessInstance(
"pid", parameters);
session.insert(process);
long processInstanceId = process.getId();
new Thread(new Runnable() {
public void run() {
session.fireUntilHalt();
}
}).start();
session.startProcessInstance(processInstanceId);
And it breaks after executing the activation (I can see that the right side of the rule is
run, as I put a variable in the process and it is there after the execution):
Exception in thread "Thread-6" org.drools.RuntimeDroolsException: Unexpected
exception executing action org.drools.common.RuleFlowGroupImpl$DeactivateCallback@645ccb
at
org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:996)
at org.drools.common.DefaultAgenda.fireUntilHalt(DefaultAgenda.java:1036)
at
org.drools.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:777)
at
org.drools.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:753)
at
org.drools.command.runtime.rule.FireUntilHaltCommand$1.run(FireUntilHaltCommand.java:50)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.NullPointerException
at
bitronix.tm.resource.jdbc.JdbcConnectionHandle.prepareStatement(JdbcConnectionHandle.java:259)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
bitronix.tm.resource.jdbc.BaseProxyHandlerClass.invoke(BaseProxyHandlerClass.java:63)
at $Proxy20.prepareStatement(Unknown Source)
at
org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:505)
at
org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:423)
at
org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:139)
at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1547)
at org.hibernate.loader.Loader.doQuery(Loader.java:673)
at
org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
at org.hibernate.loader.Loader.doList(Loader.java:2213)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104)
at org.hibernate.loader.Loader.list(Loader.java:2099)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:378)
at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:338)
at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:172)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:65)
at
org.jbpm.persistence.JpaProcessPersistenceContext.getProcessInstancesWaitingForEvent(JpaProcessPersistenceContext.java:39)
at
org.jbpm.persistence.processinstance.JPASignalManager.getProcessInstancesForEvent(JPASignalManager.java:40)
at
org.jbpm.persistence.processinstance.JPASignalManager.signalEvent(JPASignalManager.java:23)
at
org.jbpm.process.instance.ProcessRuntimeImpl$3.afterRuleFlowGroupDeactivated(ProcessRuntimeImpl.java:335)
at
org.drools.event.AgendaEventSupport.fireAfterRuleFlowGroupDeactivated(AgendaEventSupport.java:168)
at org.drools.common.RuleFlowGroupImpl.setActive(RuleFlowGroupImpl.java:148)
at
org.drools.common.RuleFlowGroupImpl$DeactivateCallback.execute(RuleFlowGroupImpl.java:301)
at
org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:994)
... 5 more
If I run it with fireAllRules() after starting the process, it works fine, so I think it
may be related with the new thead that the reactive mode uses. Do I may have some problems
with my session persistence configuration? Here is the code of my test:
public class ProcessExecutionTest {
static {
ProcessBuilderFactory
.setProcessBuilderFactoryService(new
ProcessBuilderFactoryServiceImpl());
ProcessRuntimeFactory
.setProcessRuntimeFactoryService(new
ProcessRuntimeFactoryServiceImpl());
}
private PoolingDataSource ds1;
private EntityManagerFactory emf;
@Before
public void setUp() throws Exception {
ds1 = new PoolingDataSource();
ds1.setUniqueName("jdbc/testDS1");
ds1.setClassName("org.h2.jdbcx.JdbcDataSource");
ds1.setMaxPoolSize(3);
ds1.setAllowLocalTransactions(true);
ds1.getDriverProperties().put("user", "sa");
ds1.getDriverProperties().put("password",
"sasa");
ds1.getDriverProperties().put("URL",
"jdbc:h2:mem:mydb");
ds1.init();
ds1.init();
emf = Persistence
.createEntityManagerFactory("org.jbpm.persistence.jpa");
}
private KnowledgeBase createKnowledgeBase() {
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory
.newKnowledgeBuilder();
kbuilder.add(
new ClassPathResource("myflow.bpmn"),
ResourceType.BPMN2);
kbuilder.add(
new ClassPathResource("myrule.drl"),
ResourceType.DRL);
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());
if (kbuilder.hasErrors()) {
StringBuilder errorMessage = new StringBuilder();
for (KnowledgeBuilderError error : kbuilder.getErrors()) {
errorMessage.append(error.getMessage());
errorMessage.append(System.getProperty("line.separator"));
}
Assert.fail(errorMessage.toString());
}
return kbase;
}
@Test
public void testAccrualProcessExceeded() throws Exception {
KnowledgeBase kbase = createKnowledgeBase();
EntityManagerFactory emf = Persistence
.createEntityManagerFactory("org.jbpm.persistence.jpa");
Environment env = KnowledgeBaseFactory.newEnvironment();
env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf);
env.set(EnvironmentName.TRANSACTION_MANAGER,
TransactionManagerServices.getTransactionManager());
final StatefulKnowledgeSession session = JPAKnowledgeService
.newStatefulKnowledgeSession(kbase, null, env);
new JPAWorkingMemoryDbLogger(session);
KnowledgeRuntimeLoggerFactory.newConsoleLogger(session);
JPAProcessInstanceDbLog log = new JPAProcessInstanceDbLog(env);
session.getWorkItemManager().registerWorkItemHandler("Human
Task",
new WorkItemHandler() {
public void executeWorkItem(WorkItem
workItem,
WorkItemManager
manager) {
Map variables =
log.findVariableInstances(processInstanceId);
for (Iterator iterator = variables.iterator(); iterator.hasNext();) {
VariableInstanceLog variableInstanceLog =
(VariableInstanceLog) iterator
.next();
System.out.println(variableInstanceLog);
}
}
}
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