我想要的是：
我正在创建一个原型,它应该读取bpmn2文件并列出其所有任务.
我在用什么：
目前我有一个使用jBPM 6的简单Maven应用程序.我不需要任何应用程序服务器,工作台等,因为它只是一个简单的桌面应用程序.
问题：
如果我像这样初始化引擎(as suggested by the official documentation)：
RuntimeEnvironment environment =
RuntimeEnvironmentBuilder.Factory.get()
.newDefaultInMemoryBuilder()
.persistence(false)
.addAsset(ResourceFactory.newClassPathResource("poc4.bpmn2"),ResourceType.BPMN2)
.get();
我收到此错误：
Exception in thread "main" javax.persistence.PersistenceException: No Persistence provider for EntityManager named org.jbpm.persistence.jpa
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:69)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
at org.jbpm.runtime.manager.impl.DefaultRuntimeEnvironment.init(DefaultRuntimeEnvironment.java:72)
at org.jbpm.runtime.manager.impl.RuntimeEnvironmentBuilder.get(RuntimeEnvironmentBuilder.java:314)
at org.jbpm.runtime.manager.impl.RuntimeEnvironmentBuilder.get(RuntimeEnvironmentBuilder.java:56)
at com.test.jbpmpoc.main(App.java:11)
请注意,我正在尝试使用明确禁用的持久性启动引擎,但我认为不需要,因为文档说明了the engine does NOT use persistence by default.
我知道的：
根据我的研究,至少有两种初始化引擎的方法.
>使用提供运行时环境的构建器 – 我已经在做了.这似乎是the most recommended way of doing it,因为默认情况下会初始化所有服务.但是,如here和here所述,如果你想使用Tasks(这是我做的事情),这种方法需要设置持久性.
>手动初始化所有内容.我不太喜欢这个,因为运行一个简单的应用程序听起来太费劲了.
>使用其他运行时环境构建器.
我尝试过的：
起初,我尝试使用persistence.xml suggested by the documentation,但在创建EntityManagerFactory时出现了不同的错误：
Exception in thread "main" javax.persistence.PersistenceException: Unable to build entity manager factory
at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:83)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:60)
at com.test.jbpmpoc.App.main(App.java:30)
Caused by: org.hibernate.engine.jndi.JndiException: Error parsing JNDI name [jdbc/jbpm-ds]
at org.hibernate.engine.jndi.internal.JndiServiceImpl.parseName(JndiServiceImpl.java:141)
at org.hibernate.engine.jndi.internal.JndiServiceImpl.locate(JndiServiceImpl.java:112)
at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.configure(DatasourceConnectionProviderImpl.java:115)
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:234)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.buildJdbcConnectionAccess(JdbcServicesImpl.java:260)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:94)
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:234)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206)
at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1887)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1845)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:857)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850)
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:425)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:849)
at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:75)
... 3 more
Caused by: javax.naming.NoInitialContextException: Need to specify class name in environment or system property,or as an applet parameter,or in an application resource file: java.naming.factory.initial
at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
at javax.naming.InitialContext.getURLOrDefaultInitCtx(Unknown Source)
at javax.naming.InitialContext.getNameParser(Unknown Source)
at org.hibernate.engine.jndi.internal.JndiServiceImpl.parseName(JndiServiceImpl.java:135)
... 20 more
我没有使用应用程序服务器,也没有JTA数据源和ORM文件,因此我注释了指向这些文件的行以修复此JNDI错误,然后我得到了另一个异常：
Exception in thread "main" java.lang.NoSuchMethodError: javax.persistence.NamedQuery.lockMode()Ljavax/persistence/LockModeType;
at org.hibernate.cfg.annotations.QueryHintDefinition.determineLockOptions(QueryHintDefinition.java:138)
at org.hibernate.cfg.annotations.QueryBinder.bindQuery(QueryBinder.java:72)
at org.hibernate.cfg.annotations.QueryBinder.bindQueries(QueryBinder.java:219)
at org.hibernate.cfg.AnnotationBinder.bindQueries(AnnotationBinder.java:374)
at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:618)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processAnnotatedClassesQueue(Configuration.java:3845)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processMetadata(Configuration.java:3799)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1412)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1846)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:857)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850)
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:425)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:849)
at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:75)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:60)
at com.test.jbpmpoc.App.main(App.java:30)
我很确定我离这里越来越近了.如果我在应用程序服务器外运行,是否真的需要JTA数据源和ORM文件？ jBPM安装程序没有附带这些,我在哪里可以找到它们？
我还尝试使用空构建器而不是默认构建器之一,因此我需要手动初始化所有内容,包括TaskService,如果我想管理任务(列表,执行等),我认为我需要启动它. .但是,它也需要persistence.xml,因为我一直收到No Persistence provider消息.
编辑
我之前应该猜到NoSuchMethodError异常是由错误版本的Maven工件引起的.我还在我的持久性定义中使用JTA作为我的事务策略,但是没有提供任何jta数据源.但是,现在我已经更改了我的pom.xml和persistence.xml,我收到此错误：
Exception in thread "main" javax.persistence.PersistenceException: [PersistenceUnit: org.jbpm.persistence.jpa] Unable to build EntityManagerFactory
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:900)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:57)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:63)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
at com.test.jbpmpoc.App.main(App.java:30)
Caused by: org.hibernate.HibernateException: Errors in named queries: GetProcessInstanceIdByCorrelation
at org.hibernate.impl.SessionFactoryImpl.似乎JBPMorm.xml文件中的一个命名查询是错误的.我从JBPM source code复制了这个文件.
有关我的Java项目的更多信息：
> My JBPMorm.xml
> My persistence.xml
> My pom.xml
> My project structure
我发现的所有示例和教程都专注于创建在应用程序服务器上运行的Web应用程序,但在我的情况下,缺少应用程序服务器需要一个我仍未找到的解决方法.有没有人设法使用jBPM 6运行简单的桌面应用程序？
最佳答案
我可能没有直接回答你的问题,但是我觉得可以引导你找到解决方案.
原文链接：https://www.f2er.com/java/437165.html我从问题的推论是,基本上我们想要以编程方式(没有像数据库这样的外部依赖关系)创建jBPM运行时并对其进行操作.
我建议你阅读用户指南 – 第6.8节.测试,它可以帮助您测试您的过程,您测试过程在特定用例中是否按预期运行,
http://docs.jboss.org/jbpm/v6.2/userguide/jBPMBPMN2.html#d0e4026
文档建议您扩展JbpmJUnitBaseTestCase并创建junit测试用例. JbpmJUnitBaseTestCase类将逻辑抽象为createRuntimeManager,assertProcessInstanceCompleted等…您可以引用或重用此类来构建应用程序.
