Guice Persist + Maven + GWT

Question

我试图用maven，gwt，gwt-platform和guice-persist做一个例子。

但是，我遇到了麻烦。

当我尝试用mvn gwt:run运行的例子中，我得到了以下异常：

1) Error injecting constructor, javax.persistence.PersistenceException: [PersistenceUnit: exemplo] Unable to build EntityManagerFactory at br.net.meditec.Exemplo.server.inject.AppInitializer.<init>(AppInitializer.java:9) while locating br.net.meditec.Exemplo.server.inject.AppInitializer 1 error at com.google.inject.internal.InjectorImpl$4.get(InjectorImpl.java:987)  at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1013) at br.net.meditec.Exemplo.server.inject.GuiceServletConfig.getInjector(GuiceServletConfig.java:24) at com.google.inject.servlet.GuiceServletContextListener.contextInitialized(GuiceServletContextListener.java:45) at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:543) at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)  at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)  at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:513) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448) at com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload.doStart(JettyLauncher.java:468)  at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)  at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.handler.RequestLogHandler.doStart(RequestLogHandler.java:115) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)  at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.Server.doStart(Server.java:222) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)  at com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:672) at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509)  at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068) at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811)  at com.google.gwt.dev.DevMode.main(DevMode.java:311) Caused by: javax.persistence.PersistenceException: [PersistenceUnit: exemplo] Unable to build EntityManagerFactory  at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:914) at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:889) at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:56) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:60) at com.google.inject.persist.jpa.JpaPersistService.start(JpaPersistService.java:94)  at br.net.meditec.Exemplo.server.inject.AppInitializer.<init>(AppInitializer.java:10) at br.net.meditec.Exemplo.server.inject.AppInitializer$$FastClassByGuice$$96bdac91.newInstance(<generated>)  at com.google.inject.internal.cglib.reflect.$FastConstructor.newInstance(FastConstructor.java:40) at com.google.inject.internal.DefaultConstructionProxyFactory$1.newInstance(DefaultConstructionProxyFactory.java:60) at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:85) at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:254) at com.google.inject.internal.InjectorImpl$4$1.call(InjectorImpl.java:978) at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1024) at com.google.inject.internal.InjectorImpl$4.get(InjectorImpl.java:974)  at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1013) at br.net.meditec.Exemplo.server.inject.GuiceServletConfig.getInjector(GuiceServletConfig.java:24) at com.google.inject.servlet.GuiceServletContextListener.contextInitialized(GuiceServletContextListener.java:45) at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:543) at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)  at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)  at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:513) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448) at com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload.doStart(JettyLauncher.java:468)  at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)  at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.handler.RequestLogHandler.doStart(RequestLogHandler.java:115) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)  at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.Server.doStart(Server.java:222) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)  at com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:672) at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509)  at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068) at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811)  at com.google.gwt.dev.DevMode.main(DevMode.java:311) Caused by: org.hibernate.HibernateException: Could not instantiate dialect class at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.constructDialect(DialectFactoryImpl.java:82) at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:64) at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:146)  at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75)  at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159) at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131) at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:71)  at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2273) at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2269) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1738)  at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:88) at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:904) at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:889) at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:56) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:60) at com.google.inject.persist.jpa.JpaPersistService.start(JpaPersistService.java:94)  at br.net.meditec.Exemplo.server.inject.AppInitializer.<init>(AppInitializer.java:10) at br.net.meditec.Exemplo.server.inject.AppInitializer$$FastClassByGuice$$96bdac91.newInstance(<generated>)  at com.google.inject.internal.cglib.reflect.$FastConstructor.newInstance(FastConstructor.java:40) at com.google.inject.internal.DefaultConstructionProxyFactory$1.newInstance(DefaultConstructionProxyFactory.java:60) at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:85) at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:254) at com.google.inject.internal.InjectorImpl$4$1.call(InjectorImpl.java:978) at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1024) at com.google.inject.internal.InjectorImpl$4.get(InjectorImpl.java:974)  at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1013) at br.net.meditec.Exemplo.server.inject.GuiceServletConfig.getInjector(GuiceServletConfig.java:24) at com.google.inject.servlet.GuiceServletContextListener.contextInitialized(GuiceServletContextListener.java:45) at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:543) at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)  at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)  at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:513) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448) at com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload.doStart(JettyLauncher.java:468)  at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)  at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.handler.RequestLogHandler.doStart(RequestLogHandler.java:115) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)  at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.Server.doStart(Server.java:222) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)  at com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:672) at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509)  at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068) at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811)  at com.google.gwt.dev.DevMode.main(DevMode.java:311) Caused by: java.lang.ClassCastException: org.hibernate.dialect.PostgreSQLDialect cannot be cast to org.hibernate.dialect.Dialect at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.constructDialect(DialectFactoryImpl.java:73) at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:64) at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:146)  at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75)  at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159) at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131) at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:71)  at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2273) at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2269) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1738)  at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:88) at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:904) at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:889) at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:56) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:60) at com.google.inject.persist.jpa.JpaPersistService.start(JpaPersistService.java:94)  at br.net.meditec.Exemplo.server.inject.AppInitializer.<init>(AppInitializer.java:10) at br.net.meditec.Exemplo.server.inject.AppInitializer$$FastClassByGuice$$96bdac91.newInstance(<generated>)  at com.google.inject.internal.cglib.reflect.$FastConstructor.newInstance(FastConstructor.java:40) at com.google.inject.internal.DefaultConstructionProxyFactory$1.newInstance(DefaultConstructionProxyFactory.java:60) at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:85) at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:254) at com.google.inject.internal.InjectorImpl$4$1.call(InjectorImpl.java:978) at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1024) at com.google.inject.internal.InjectorImpl$4.get(InjectorImpl.java:974)  at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1013) at br.net.meditec.Exemplo.server.inject.GuiceServletConfig.getInjector(GuiceServletConfig.java:24) at com.google.inject.servlet.GuiceServletContextListener.contextInitialized(GuiceServletContextListener.java:45) at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:543) at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)  at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)  at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:513) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448) at com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload.doStart(JettyLauncher.java:468)  at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)  at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.handler.RequestLogHandler.doStart(RequestLogHandler.java:115) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)  at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.Server.doStart(Server.java:222) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)  at com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:672) at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509)  at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068) at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811)  at com.google.gwt.dev.DevMode.main(DevMode.java:311) 

如果我跑通过Eclipse的模块，我得到了另一个异常：

1) Error injecting constructor, javax.persistence.PersistenceException: No Persistence provider for EntityManager named exemplo 
    at br.net.meditec.Exemplo.server.inject.AppInitializer.<init>(AppInitializer.java:9) 
    while locating br.net.meditec.Exemplo.server.inject.AppInitializer 

1 error 
    at com.google.inject.internal.InjectorImpl$4.get(InjectorImpl.java:987) 
    at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1013) 
    at br.net.meditec.Exemplo.server.inject.GuiceServletConfig.getInjector(GuiceServletConfig.java:24) 
    at com.google.inject.servlet.GuiceServletContextListener.contextInitialized(GuiceServletContextListener.java:45) 
    at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:543) 
    at org.mortbay.jetty.servlet.Context.startContext(Context.java:136) 
    at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220) 
    at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:513) 
    at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448) 
    at com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload.doStart(JettyLauncher.java:468) 
    at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39) 
    at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) 
    at org.mortbay.jetty.handler.RequestLogHandler.doStart(RequestLogHandler.java:115) 
    at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39) 
    at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) 
    at org.mortbay.jetty.Server.doStart(Server.java:222) 
    at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39) 
    at com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:672) 
    at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509) 
    at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068) 
    at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811) 
    at com.google.gwt.dev.DevMode.main(DevMode.java:311) 
Caused by: javax.persistence.PersistenceException: No Persistence provider for EntityManager named exemplo 
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:89) 
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:60) 
    at com.google.inject.persist.jpa.JpaPersistService.start(JpaPersistService.java:94) 
    at br.net.meditec.Exemplo.server.inject.AppInitializer.<init>(AppInitializer.java:10) 
    at br.net.meditec.Exemplo.server.inject.AppInitializer$$FastClassByGuice$$96bdac91.newInstance(<generated>) 
    at com.google.inject.internal.cglib.reflect.$FastConstructor.newInstance(FastConstructor.java:40) 
    at com.google.inject.internal.DefaultConstructionProxyFactory$1.newInstance(DefaultConstructionProxyFactory.java:60) 
    at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:85) 
    at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:254) 
    at com.google.inject.internal.InjectorImpl$4$1.call(InjectorImpl.java:978) 
    at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1024) 
    at com.google.inject.internal.InjectorImpl$4.get(InjectorImpl.java:974) 
    ... 21 more 

在第一错误，看起来像没有发现PostgreSQLDialect，在第二个，似乎它没有找到persistence.xml本身。

我创建了以下内容的一类，它工作得很好：

public class DaoInjectionTest { 
    public static void main(String[] args) { 
     Injector injector = Guice.createInjector(new DaoModule(), 
       new JpaPersistModule("exemplo")); 
     injector.getInstance(AppInitializer.class); 

     injector.getInstance(RacaDao.class).save(new Raca("cachorro pastor alemao")); 
    } 
} 

所以，我无法理解发生了什么。有人可以帮忙吗？

如果可以帮助，code of my project is in github。

非常感谢。

Answer 1

我解决这个问题下面这个链接：

https://developers.google.com/eclipse/docs/faq#gwt_with_maven

感谢，反正