Question

我创建了一个jBPM项目，选择添加一个包含Human Tasks管理的默认示例。改变了方法JBPMHelper.startTaskService（）;通过这些说明

EntityManagerFactory emf = Persistence.createEntityManagerFactory("org.jbpm.task");

TaskService taskService = new TaskService(emf,`enter code here           `SystemEventListenerFactory.getSystemEventListener());

MinaTaskServer server = new MinaTaskServer( taskService );

Thread thread = new Thread( server );

thread.start();
but when i try to excecute this simple example i get this error

Exception in thread "main" javax.persistence.PersistenceException: [PersistenceUnit: org.jbpm.task] Unable to build EntityManagerFactory
    at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:677)
    at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:126)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:52)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:34)
    at com.sample.ProcessMain.main(ProcessMain.java:24)
Caused by: org.hibernate.HibernateException: 'hibernate.dialect' must be set when no Connection avalable
    at org.hibernate.dialect.resolver.DialectFactory.buildDialect(DialectFactory.java:107)
    at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:134)
    at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2119)
    at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2115)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1339)
    at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:867)
    at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:669)
Knowing that when i type ant start.demo  i get all the tools(jboss 7, eclipse, h2) but the human task not start. the message in the console is it dosn't complete


start.human.task:
    [javac] C:\jbpm-5.2.0.Final-installer-full\jbpm-installer\build.xml:647: war
ning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; se
t to false for repeatable builds
     [java] Task service registered usergroup callback ...
     [java] Task service started correctly!
     [java] Task service running ...

Answer 1

使用安装程序启动任务服务似乎工作正常（当您看起来“正在运行任务服务...”时，它正确启动）。请注意，这是在命令中运行的普通Java进程，因此它不会返回，它将保持活动状态，并在该控制台中显示日志信息。关闭命令提示符（或按Ctrl-C）将终止任务服务。从jBPM 5.2开始，您还可以使用可以部署到应用程序服务器的war来在服务器上作为服务运行任务服务。

关于您遇到的其他错误，您似乎缺少持久性配置文件中的“hibernate.dialect”属性。您是否只是尝试执行生成的样本，或者您是否修改了它（如果是，为什么/如何）？

克里斯

Answer 2

有时当我使用ant start.demo命令启动服务器时，部署失败。您可以检查战争文件是否在dir中正确部署：jboss-as-7.0.2.Final \ standalone \ deployments。例如，如果部署了jbpm控制台，则应该具有以下部署文件：jbpm-gwt-console.war.deployed。有时服务器无法部署其中一个。在这种情况下，只需删除失败的部署文件，然后重新开始。在大多数情况下，问题已经解决了。

Hunor

jBPM 5人类任务

2 个答案: