Fer*_*Paz 5 java persistence desktop-application jbpm
我正在创建一个原型,它应该读取bpmn2文件并列出其所有任务.
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.
如果我像这样初始化引擎(正如官方文档所建议的那样):
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,因为文档说默认情况下引擎不使用持久性.
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.这似乎是最推荐的方法,因为默认情况下会初始化所有服务.但是,正如这里和这里所说的,如果你想使用Tasks(这是我做的事情),这个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.
起初,我尝试使用文档建议的persistence.xml,但在创建时遇到了不同的错误EntityManagerFactory:
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,因为我不断收到No Persistence provider消息.
我之前应该猜到NoSuchMethodError异常是由错误版本中的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.<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
似乎其中一个命名查询形成的JBPMorm.xml文件是错误的.我从JBPM源代码复制了这个文件.
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？
我可能不会直接回答你的问题，但我觉得下面的答案可以指导你找到解决方案。
我从问题中得出的结论是，基本上我们希望以编程方式（没有数据库等外部依赖项）创建 jBPM 运行时并对其进行操作。
我建议您仔细阅读用户指南 - 第 6.8 节。测试，帮助您测试流程，测试流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
该文档建议您扩展 JbpmJUnitBaseTestCase 并创建 junit 测试用例。JbpmJUnitBaseTestCase 类抽象了 createRuntimeManager、assertProcessInstanceCompleted 等的逻辑...您可以引用或重用此类来构建您的应用程序。