Java 如何在桌面应用程序中设置jBPM? 我想要的是:
我正在创建一个原型,它应该读取bpmn2文件并列出它的所有任务 我使用的是: 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 问题是: 如果我像这样初始化引擎(): 我得到这个错误:Java 如何在桌面应用程序中设置jBPM? 我想要的是:,java,persistence,desktop-application,jbpm,Java,Persistence,Desktop Application,Jbpm,我正在创建一个原型,它应该读取bpmn2文件并列出它的所有任务 我使用的是: 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 问题是: 如果我像这样初始化引擎(): 我得到这个错误: Exception in thread "main" javax.persistence.PersistenceException: No Persistence provider for EntityManager named org.j
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)
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.<init>(SessionFactoryImpl.java:435)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1385)
at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:954)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:891)
... 4 more
请注意,我试图在显式禁用持久性的情况下启动引擎,但我认为这是不必要的,因为文档中说明了这一点
据我所知:
根据我的研究,至少有两种初始化引擎的方法
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$4.perform(EntityManagerFactoryBuilderImpl.java:850)
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:425)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:849)
at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:75)
... 3 more
Caused by: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
at javax.naming.InitialContext.getURLOrDefaultInitCtx(Unknown Source)
at javax.naming.InitialContext.getNameParser(Unknown Source)
at org.hibernate.engine.jndi.internal.JndiServiceImpl.parseName(JndiServiceImpl.java:135)
... 20 more
我没有使用应用服务器,也没有JTA数据源和ORM文件,因此我对指向这些文件的行进行了注释,以修复此JNDI错误,然后我得到了另一个异常:
Exception in thread "main" java.lang.NoSuchMethodError: javax.persistence.NamedQuery.lockMode()Ljavax/persistence/LockModeType;
at org.hibernate.cfg.annotations.QueryHintDefinition.determineLockOptions(QueryHintDefinition.java:138)
at org.hibernate.cfg.annotations.QueryBinder.bindQuery(QueryBinder.java:72)
at org.hibernate.cfg.annotations.QueryBinder.bindQueries(QueryBinder.java:219)
at org.hibernate.cfg.AnnotationBinder.bindQueries(AnnotationBinder.java:374)
at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:618)
at org.hibernate.cfg.Configuration$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。如果我在应用服务器之外运行,我真的需要JTA数据源和ORM文件吗?jBPM安装程序没有这些,我在哪里可以找到它们
我还尝试使用一个空的构建器而不是一个默认的构建器,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),我认为需要启动TaskService。但是,它也需要persistence.xml,因为我一直收到No persistence provider
消息
编辑
我早就应该猜到,NoSuchMethodError
异常是由错误版本中的Maven工件引起的。在持久性定义中,我还将JTA作为事务策略,但没有提供任何JTA数据源。但是,现在我已经更改了pom.xml和persistence.xml,我遇到了以下错误:
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)
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.<init>(SessionFactoryImpl.java:435)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1385)
at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:954)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:891)
... 4 more
线程“main”javax.persistence.PersistenceException中的异常:[PersistenceUnit:org.jbpm.persistence.jpa]无法构建EntityManagerFactory
位于org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:900)
位于org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:57)
位于javax.persistence.persistence.createEntityManagerFactory(persistence.java:63)
位于javax.persistence.persistence.createEntityManagerFactory(persistence.java:47)
位于com.test.jbpmpoc.App.main(App.java:30)
原因:org.hibernate.HibernateException:命名查询中的错误:GetProcessInstanceIdByCorrelation
位于org.hibernate.impl.SessionFactoryImpl。(SessionFactoryImpl.java:435)
位于org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1385)
位于org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:954)
位于org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:891)
... 4更多
看来JBPMorm.xml
文件中的一个命名查询是错误的。我从中复制了这个文件
有关我的Java项目的更多信息:
我发现的所有示例和教程都集中在创建在应用服务器上运行的web应用程序上,但在我的例子中,缺少应用服务器需要一个解决方案,我还没有找到有人使用jBPM 6运行过简单的桌面应用程序吗?我可能没有直接回答您的问题,但我觉得下面的答案可以引导您找到解决方案 我从这个问题得出的结论是,基本上这里我们希望以编程方式(不需要数据库等外部依赖项)创建jBPM运行时并对其进行操作 我建议您阅读用户指南-第6.8节。测试,这有助于您测试流程,您可以测试流程在特定用例中是否按预期运行 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
请参见谢谢您的回复。实际上我以前也试过,但是我仍然得到了
java.lang.NoSuchMethodError:javax.persistence.NamedQuery.lockMode()Ljavax/persistence/LockModeType调用createRuntimeManager(“poc4.bpmn2”)时出现代码>异常代码>。为了摆脱它,我可以在禁用持久性的情况下调用超类构造函数,但是这样我就不能使用任务服务了。