Question

我很难通过ejb项目将UserEntitys持久保存在JavaDB上。我尝试了来自各种Google搜索的几种解决方案，但似乎没有帮助。

我正在使用GlassFish 4及其随附的JavaDB。

这是我的Statlessbean，需要EntityManager 据我所知，应该由容器通过@PersistenceContext注入。

@Stateless
public class UserManagementBean implements UserManagementLocal, UserManagementRemote {
    @PersistenceContext(unitName = "ChatDB")
    private EntityManager entityManager;

    @EJB
    private ChatManagementLocal chatManagement;
    @EJB
    private StatisticManagementLocal statisticManagement;

    //...

    @Override
    public void login(String username, String password) throws Exception {
        //...
    }

    @Override
    public void logout(String username) {
        //...
    }

    @Override
    public void registerUser(String username, String password) throws Exception {
        TypedQuery<UserEntity> query = entityManager.createNamedQuery("UserEntity.singleUser", UserEntity.class);
        query.setParameter("username", username);

        UserEntity foundUser;

        try {
            foundUser = query.getSingleResult();
        } catch (NoResultException e) {
            foundUser = new UserEntity();
            foundUser.setLoggedIn(false);
            foundUser.setUsername(username);
            foundUser.setPassword(generateHash(password));

            entityManager.persist(foundUser);
            chatManagement.sendRegisterMessage(username);
        }

        throw new Exception("Der Benutzername ist bereits vergeben.");
    }

    public String generateHash(String password { ... }
}

project-ejb
--META-INF
---- persistance.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" 
    xmlns="http://java.sun.com/xml/ns/persistence" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
    http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
    <persistence-unit name="ChatDB" transaction-type="JTA">
        <jta-data-source>java:app/jdbc/ChatDB</jta-data-source>
        <jar-file>Chat-common.jar</jar-file>
        <properties>
            <property name="eclipselink.target-database" value="Derby"/>
            <property name="eclipselink.ddl-generation" value="drop-and-create-tables" />
            <property name="eclipselink.logging.level" value="INFO"/>
        </properties>
    </persistence-unit>
</persistence>

project-ear
--META-INF
---- glassfish-resources.xml

    <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE resources PUBLIC
"-//GlassFish.org//DTD GlassFish Application Server 3.1 Resource Definitions//EN"
"http://glassfish.org/dtds/glassfish-resources_1_5.dtd">
<resources>
    <jdbc-connection-pool name="ChatDBPool"
            res-type="javax.sql.ConnectionPoolDataSource"
            datasource-classname="org.apache.derby.jdbc.ClientDataSource">
        <property name="serverName" value="localhost" />
        <property name="port" value="1527" />
        <property name="databaseName" value="chat" />
        <property name="connectionAttributes" value=";create=true"></property>
        <property name="user" value="APP" />
        <property name="password" value="APP" />
    </jdbc-connection-pool>
    <jdbc-resource enabled="true"
        jndi-name="java:app/jdbc/ChatDB"
        pool-name="ChatDBPool" />
</resources>

控制台

javax.ejb.EJBException
at com.sun.ejb.containers.EJBContainerTransactionManager.processSystemException(EJBContainerTransactionManager.java:752)
at com.sun.ejb.containers.EJBContainerTransactionManager.completeNewTx(EJBContainerTransactionManager.java:702)
at com.sun.ejb.containers.EJBContainerTransactionManager.postInvokeTx(EJBContainerTransactionManager.java:507)
at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4566)
at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2074)
at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2044)
at com.sun.ejb.containers.EJBObjectInvocationHandler.invoke(EJBObjectInvocationHandler.java:212)
at com.sun.ejb.containers.EJBObjectInvocationHandlerDelegate.invoke(EJBObjectInvocationHandlerDelegate.java:79)
at com.sun.proxy.$Proxy286.registerUser(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie.dispatchToMethod(ReflectiveTie.java:143)
at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie._invoke(ReflectiveTie.java:173)
at com.sun.corba.ee.impl.protocol.ServerRequestDispatcherImpl.dispatchToServant(ServerRequestDispatcherImpl.java:528)
at com.sun.corba.ee.impl.protocol.ServerRequestDispatcherImpl.dispatch(ServerRequestDispatcherImpl.java:199)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequestRequest(MessageMediatorImpl.java:1549)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequest(MessageMediatorImpl.java:1425)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleInput(MessageMediatorImpl.java:930)
at com.sun.corba.ee.impl.protocol.giopmsgheaders.RequestMessage_1_2.callback(RequestMessage_1_2.java:213)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequest(MessageMediatorImpl.java:694)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.dispatch(MessageMediatorImpl.java:496)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.doWork(MessageMediatorImpl.java:2222)
at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.performWork(ThreadPoolImpl.java:497)
at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:540)
Caused by: java.lang.IllegalStateException: Unable to retrieve EntityManagerFactory for unitName ChatDB
at com.sun.enterprise.container.common.impl.EntityManagerWrapper.init(EntityManagerWrapper.java:138)
at com.sun.enterprise.container.common.impl.EntityManagerWrapper._getDelegate(EntityManagerWrapper.java:171)
at com.sun.enterprise.container.common.impl.EntityManagerWrapper.createNamedQuery(EntityManagerWrapper.java:544)
at de.fh_dortmund.inf.cw.chat.server.beans.UserManagementBean.registerUser(UserManagementBean.java:146)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1081)
at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1153)
at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:4786)
at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:656)
at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:608)
at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:73)
at org.jboss.weld.ejb.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:52)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883)
at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:608)
at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doCall(SystemInterceptorProxy.java:163)
at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:140)
at sun.reflect.GeneratedMethodAccessor71.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883)
at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:369)
at  com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:4758)
at  com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4746)
at  com.sun.ejb.containers.EJBObjectInvocationHandler.invoke(EJBObjectInvocationHandler.java:205)
... 19 more

在这一点上，我不知道如何开始这个问题，我错过了什么？我应该检查什么？您还需要什么详细信息？

Answer 1

此：

project-ejb 
--META-INF 
----persistance.xml

看起来可疑。

您似乎输入了错误的“ persistence.xml”。

在无状态EJB Bean中检索EnityManagerFactory的问题

1 个答案: