我用Jbpm5开始了几天，并直接遇到以下问题：
我找到了下面的示例，可以将其作为JUnit测试运行。已成功创建包含用户和组的所有表。之后我创建了一个Spring Service并将该代码段发布到@PostConstruct方法中。但现在跟随异常总是发生。我不得不说我的SpringContext使用org.springframework.orm.hibernate4.HibernateTransactionManager作为PlatformTxMngr。但是，如果我以编程方式准备所有资源，这应该不是问题，对吗？我也在JBPM社区中发布了这个：https://community.jboss.org/thread/232060
非常感谢你的帮助!!!
例外：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'workflowServiceWrapper': Invocation of init method failed; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:135)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:394)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1448)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:607)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:925)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:472)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:388)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:293)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4797)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5291)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
引起：java.lang.NullPointerException
at org.drools.persistence.jta.JtaTransactionManager.getStatus(JtaTransactionManager.java:205)
at org.jbpm.task.service.persistence.TaskJTATransactionManager.getStatus(TaskJTATransactionManager.java:72)
at org.jbpm.task.service.persistence.TaskJTATransactionManager.begin(TaskJTATransactionManager.java:45)
at org.jbpm.task.service.persistence.TaskPersistenceManager.beginTransaction(TaskPersistenceManager.java:100)
at org.jbpm.task.service.persistence.TaskPersistenceManager.getUnescalatedDeadlines(TaskPersistenceManager.java:177)
at org.jbpm.task.service.TaskServiceSession.scheduleUnescalatedDeadlines(TaskServiceSession.java:242)
at org.jbpm.task.service.TaskService.initialize(TaskService.java:134)
at org.jbpm.task.service.TaskService.initialize(TaskService.java:119)
at org.jbpm.task.service.TaskService.<init>(TaskService.java:97)
我的测试：
@Test
public void startDemo() {
Properties driverProperties = new Properties();
driverProperties.put("driverClassName", "driverName");
driverProperties.put("user", "username");
driverProperties.put("password", "password");
driverProperties.put("url", "url");
//JNDI Support to make DataSources for TransactionManager available
System.getProperties().put("java.naming.factory.initial", "bitronix.tm.jndi.BitronixInitialContextFactory");
//JPA/JTA/JNDI compatible DataSource
PoolingDataSource ds = new PoolingDataSource();
ds.setUniqueName("jdbc/BitronixJTADataSource"); // => referenced by persistence.xml
ds.setClassName("bitronix.tm.resource.jdbc.lrc.LrcXADataSource");
ds.setMaxPoolSize(3);
ds.setAllowLocalTransactions(true);
ds.setDriverProperties(driverProperties);
ds.init();
EntityManagerFactory emf = Persistence.createEntityManagerFactory("org.jbpm.task");
TaskService taskService = new TaskService(emf, SystemEventListenerFactory.getSystemEventListener());
TaskServiceSession taskSession = taskService.createSession();
// Add demo users
Map vars = new HashMap();
InputStream usersin = DemoTaskService.class.getResourceAsStream("LoadUsers.mvel");
if(usersin != null) {
Reader reader = new InputStreamReader(usersin);
@SuppressWarnings("unchecked")
Map<String, User> users = (Map<String, User>) TaskService.eval(reader, vars);
for(User user : users.values()) {
taskSession.addUser(user);
}
}
//add demo groups
InputStream groupsin = DemoTaskService.class.getResourceAsStream("LoadGroups.mvel");
if(groupsin != null) {
Reader reader = new InputStreamReader(groupsin);
@SuppressWarnings("unchecked")
Map<String, Group> groups = (Map<String, Group>) TaskService.eval(reader, vars);
for(Group group : groups.values()) {
taskSession.addGroup(group);
}
}
// start mina server
MinaTaskServer server = new MinaTaskServer(taskService, 5153);
Thread thread = new Thread(server);
thread.start();
taskSession.dispose();
System.out.println("Task service started correctly!");
System.out.println("Task service running ...");
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(ResourceFactory.newClassPathResource("sample.bpmn"), ResourceType.BPMN2);
KnowledgeBase kbase = kbuilder.newKnowledgeBase();
StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
MinaHTWorkItemHandler humanTaskHandler = new MinaHTWorkItemHandler(ksession);
humanTaskHandler.setIpAddress("127.0.0.1");
humanTaskHandler.setPort(5153);
ksession.getWorkItemManager().registerWorkItemHandler("Human Task", humanTaskHandler);
Map<String, Object> params = new HashMap<String, Object>();
ksession.startProcess("com.sample.bpmn.hello", params);
ksession.dispose();
taskSession = taskService.createSession();
List<TaskSummary> list = taskSession.getTasksOwned("krisv", "en-UK");
System.out.println("Taskinstance: " + list.size());
taskSession.dispose();
}
的persistence.xml
<persistence>
</persistence-unit>
<persistence-unit name="org.jbpm.task">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jta-data-source>jdbc/BitronixJTADataSource</jta-data-source>
<mapping-file>META-INF/Taskorm-JPA2.xml</mapping-file>
<class>org.jbpm.task.Attachment</class>
<class>org.jbpm.task.BooleanExpression</class>
<class>org.jbpm.task.Comment</class>
<class>org.jbpm.task.Content</class>
<class>org.jbpm.task.Deadline</class>
<class>org.jbpm.task.Delegation</class>
<class>org.jbpm.task.EmailNotification</class>
<class>org.jbpm.task.EmailNotificationHeader</class>
<class>org.jbpm.task.Escalation</class>
<class>org.jbpm.task.Group</class>
<class>org.jbpm.task.I18NText</class>
<class>org.jbpm.task.Notification</class>
<class>org.jbpm.task.OnAllSubTasksEndParentEndStrategy</class>
<class>org.jbpm.task.OnParentAbortAllSubTasksEndStrategy</class>
<class>org.jbpm.task.PeopleAssignments</class>
<class>org.jbpm.task.Reassignment</class>
<class>org.jbpm.task.Status</class>
<class>org.jbpm.task.SubTasksStrategy</class>
<class>org.jbpm.task.Task</class>
<class>org.jbpm.task.TaskData</class>
<class>org.jbpm.task.User</class>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.SQLServerDialect" />
<property name="hibernate.max_fetch_depth" value="3" />
<property name="hibernate.hbm2ddl.auto" value="create" />
<property name="hibernate.show_sql" value="false" />
<property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.BTMTransactionManagerLookup" />
<!-- BZ 841786: AS7/EAP 6/Hib 4 uses new (sequence) generators which seem to cause problems -->
<property name="hibernate.id.new_generator_mappings" value="false" />
</properties>
</persistence-unit>
</persistence>