java - 无法在 JBPM 中启动和完成任务

Question

我已经在 KieWorkbench 中创建了业务流程并构建了 jar，如下所示:业务流程:进程ID:myWorkflow.process

创建任务 -Actor:myUser1

提交任务 -Actor : myUser2

GAV:组:com.mycom.app.bpm

工件:我的工作流

版本:1.0

根据我的要求，我需要在一个模块(Test1.war)中创建任务([第一个任务]开始和完成)，并在另一个模块(Test2.war)中提交任务[第二个任务]开始和完成) 。每个模块都有其单独的 UI。

Test1.war 中的代码:RuntimeEngine创建过程:

String deploymentId = "com.sample:example:1.0";
ReleaseId releaseId = new ReleaseIdImpl("com.mycom.app.bpm",  "myWorkflow",  "1.0");
EntityManagerFactory emf = Persistence.createEntityManagerFactory("org.jbpm.domain");
RuntimeEnvironmentBuilder builder = RuntimeEnvironmentBuilder.Factory.get().newDefaultBuilder(releaseId).entityManagerFactory(emf).userGroupCallback(new CustomUserCallBack());
RuntimeEngine runtimeEngine = RuntimeManagerFactory.Factory.get().newSingletonRuntimeManager(builder.get(), deploymentId).getRuntimeEngine(null);
KieSession ksession =runtimeEngine.getKieSession();
ProcessInstance processInstance = ksession.startProcess("myWorkflow.process", null);

TaskService taskService = runtimeEngine.getTaskService();
List<Status> status = new ArrayList<Status>();
status.add(Status.Ready);
status.add(Status.Reserved);

List<TaskSummary> tasks = taskService.getTasksByStatusByProcessInstanceId(processInstance.getId(), status, "en-UK");
taskService.start(tasks.get(0).getId(), "myUser1");
taskService.complete(tasks.get(0).getId(), "myUser1", null);

我将 processIntanceId 保存在单独的表中。

Test2.war 中的代码RuntimeEngine创建过程:

这里我正在检索 processIntanceId 并提交任务(业务流程中的第二个任务)

String deploymentId = "com.sample:example:1.0";
ReleaseId releaseId = new ReleaseIdImpl("com.mycom.app.bpm",  "myWorkflow",  "1.0");
EntityManagerFactory emf = Persistence.createEntityManagerFactory("org.jbpm.domain");
RuntimeEnvironmentBuilder builder = RuntimeEnvironmentBuilder.Factory.get().newDefaultBuilder(releaseId).entityManagerFactory(emf).userGroupCallback(new CustomUserCallBack());
RuntimeEngine runtimeEngine = RuntimeManagerFactory.Factory.get().newSingletonRuntimeManager(builder.get(), deploymentId).getRuntimeEngine(null);
KieSession ksession =runtimeEngine.getKieSession();
TaskService taskService = runtimeEngine.getTaskService();

List<Status> status = new ArrayList<Status>();
status.add(Status.Ready);
status.add(Status.Reserved);

List<TaskSummary> tasks = taskService.getTasksByStatusByProcessInstanceId(processInstance.getId(), status, "en-UK");
taskService.start(tasks.get(0).getId(), "myUser2");
taskService.complete(tasks.get(0).getId(), "myUser2", null);

当我在第二个模块(Test2.war)中启动任务(提交)时，出现以下异常:

[com.arjuna.ats.arjuna] (ajp-localhost-127.0.0.1-8009-3) ARJUNA012125: TwoPhaseCoordinator.beforeCompletion - failed for SynchronizationImple< 0:ffff0a04302f:6c42330f:57515432:1cf9, org.hibernate.engine.transaction.synchronization.internal.RegisteredSynchronization@5cf07878

: javax.persistence.OptimisticLockException: org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [org.drools.persistence.info.SessionInfo#11629] at org.hibernate.ejb.AbstractEntityManagerImpl.wrapStaleStateException(AbstractEntityManagerImpl.java:1390) at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1308) at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1289) at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1295) at org.hibernate.ejb.AbstractEntityManagerImpl$CallbackExceptionMapperImpl.mapManagedFlushFailure(AbstractEntityManagerImpl.java:1481) at org.hibernate.engine.transaction.synchronization.internal.SynchronizationCallbackCoordinatorImpl.beforeCompletion(SynchronizationCallbackCoordinatorImpl.java:109) at org.hibernate.engine.transaction.synchronization.internal.RegisteredSynchronization.beforeCompletion(RegisteredSynchronization.java:53) at com.arjuna.ats.internal.jta.resources.arjunacore.SynchronizationImple.beforeCompletion(SynchronizationImple.java:76) [jbossjts-4.16.2.Final.jar:] at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.beforeCompletion(TwoPhaseCoordinator.java:273) [jbossjts-4.16.2.Final.jar:] at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.end(TwoPhaseCoordinator.java:93) [jbossjts-4.16.2.Final.jar:] at com.arjuna.ats.arjuna.AtomicAction.commit(AtomicAction.java:164) [jbossjts-4.16.2.Final.jar:] at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1165) [jbossjts-4.16.2.Final.jar:] at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:117) [jbossjts-4.16.2.Final.jar:] at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.commit(BaseTransactionManagerDelegate.java:75) [jbossjts-integration-4.16.2.Final.jar:] at org.jboss.tm.usertx.client.ServerVMClientUserTransaction.commit(ServerVMClientUserTransaction.java:167) [jboss-transaction-spi-7.0.0.Final.jar:7.0.0.Final] at org.drools.persistence.jta.JtaTransactionManager.commit(JtaTransactionManager.java:226) [drools-persistence-jpa-6.2.0.Final.jar:6.2.0.Final] at org.jbpm.services.task.persistence.TaskTransactionInterceptor.execute(TaskTransactionInterceptor.java:56) [jbpm-human-task-jpa-6.2.0.Final.jar:6.2.0.Final] at org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:41) [drools-core-6.2.0.Final.jar:6.2.0.Final] at org.drools.persistence.jta.TransactionLockInterceptor.execute(TransactionLockInterceptor.java:79) [drools-persistence-jpa-6.2.0.Final.jar:6.2.0.Final] at org.jbpm.services.task.commands.TaskCommandExecutorImpl.execute(TaskCommandExecutorImpl.java:40) [jbpm-human-task-core-6.2.0.Final.jar:6.2.0.Final] at org.jbpm.services.task.impl.command.CommandBasedTaskService.complete(CommandBasedTaskService.java:156) [jbpm-human-task-core-6.2.0.Final.jar:6.2.0.Final] at org.jbpm.runtime.manager.impl.task.SynchronizedTaskService.complete(SynchronizedTaskService.java:130) [jbpm-runtime-manager-6.2.0.Final.jar:6.2.0.Final] Can anyone tell me what mistake i am doing here...

Answer 1

不要使用单例运行时管理器方法，而是尝试切换到每个流程实例。并且还要确保在请求结束时将运行时引擎处理回运行时管理器。

原因是，通过使用单例，您在两个 war 中实例化同一 session (相同 session id)的两个实例(因为 session id 可以存储在 jboss 数据目录中，因此两个 war 都会选择相同的) 。