带有MongoDB的Eclipselink java.lang.ClassCastException [英] Eclipselink with MongoDB java.lang.ClassCastException
问题描述
我正在尝试使用Eclipselink和MongoDB配置nosql持久性单元,但是我在部署过程中遇到了以下堆栈异常;
I'm trying to configure a nosql persistence unit using Eclipselink and MongoDB but Im getting the following stack exception during deployment;
...
SEVERE: java.lang.ClassCastException: org.eclipse.persistence.nosql.adapters.mongo.MongoPlatform cannot be cast to org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
at org.eclipse.persistence.sequencing.TableSequence.onConnect(TableSequence.java:168)
at org.eclipse.persistence.sequencing.Sequence.onConnect(Sequence.java:270)
at org.eclipse.persistence.internal.sequencing.SequencingManager.onConnectSequences(SequencingManager.java:927)
at org.eclipse.persistence.internal.sequencing.SequencingManager.onConnectInternal(SequencingManager.java:747)
at org.eclipse.persistence.internal.sequencing.SequencingManager.onConnect(SequencingManager.java:700)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeSequencing(DatabaseSessionImpl.java:281)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:629)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:625)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:565)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.postConnectDatasource(DatabaseSessionImpl.java:792)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.login(DatabaseSessionImpl.java:749)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:241)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:681)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getAbstractSession(EntityManagerFactoryDelegate.java:204)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:304)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:336)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:302)
at org.glassfish.persistence.jpa.JPADeployer$2.visitPUD(JPADeployer.java:451)
at org.glassfish.persistence.jpa.JPADeployer$PersistenceUnitDescriptorIterator.iteratePUDs(JPADeployer.java:510)
at org.glassfish.persistence.jpa.JPADeployer.iterateInitializedPUsAtApplicationPrepare(JPADeployer.java:492)
at org.glassfish.persistence.jpa.JPADeployer.event(JPADeployer.java:395)
at org.glassfish.kernel.event.EventsImpl.send(EventsImpl.java:131)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:484)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:219)
at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:491)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:527)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:523)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:356)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$2.execute(CommandRunnerImpl.java:522)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:546)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1423)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1500(CommandRunnerImpl.java:108)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1762)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1674)
at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:534)
at com.sun.enterprise.v3.admin.AdminAdapter.onMissingResource(AdminAdapter.java:224)
at org.glassfish.grizzly.http.server.StaticHttpHandler.service(StaticHttpHandler.java:297)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:246)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:113)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:564)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:544)
at java.lang.Thread.run(Thread.java:722)
连接似乎已成功建立,但随后我收到java.lang.ClassCastException并关闭了连接.
The connection seems to be successfully established but then I get a java.lang.ClassCastException and the connection gets closed.
我在persistence.xml中的PU看起来像这样:
My PU in the persistence.xml looks like this:
<persistence-unit name="NoSQL_PU" transaction-type="JTA">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties>
<property name="eclipselink.target-database" value="org.eclipse.persistence.nosql.adapters.mongo.MongoPlatform"/>
<property name="eclipselink.nosql.connection-spec" value="org.eclipse.persistence.nosql.adapters.mongo.MongoConnectionSpec"/>
<property name="eclipselink.nosql.property.mongo.port" value="27017"/>
<property name="eclipselink.nosql.property.mongo.host" value="localhost"/>
<property name="eclipselink.nosql.property.mongo.db" value="dev"/>
<property name="eclipselink.logging.level" value="FINEST"/>
</properties>
</persistence-unit>
我的NoSQL实体类;
My NoSQL Entity class;
@NamedQueries({
@NamedQuery(name = "Comment.findAll", query = "SELECT e FROM Comment e"),
@NamedQuery(name = "Comment.findByPK", query = "SELECT e FROM Comment e WHERE e.id = :id"),})
@Entity
@NoSql(dataFormat = DataFormatType.MAPPED)
public class Comment implements Serializable {
// Serial-------------------------------------------------------------------
private static final long serialVersionUID = 1L;
// Variables----------------------------------------------------------------
@Id
@GeneratedValue
@Field(name="_id")
private String id;
@Basic
private Long created;
@Basic
private String commenterId;
@Basic
private String comment;
// Constructors-------------------------------------------------------------
// Getters------------------------------------------------------------------
// Setters------------------------------------------------------------------
}
我使用CTM,因此我在无状态会话bean中调用PU;
Im using CTM so Im calling the PU in a stateless session bean;
@Stateless
public class TicketDAOImpl implements TicketDAO {
@PersistenceContext(unitName = "NoSQL_PU")
private EntityManager em;
}
我一直在遵循 eclipselink指南,但找不到任何相关内容对此.
Ive been following the eclipselink guide but I can't find anything pertaining to this.
推荐答案
问题出在我的持久性单元上.默认情况下,所有Entity类都包括在内,因此,我的NoSQL和SQL实体都被传递到了SQL和NoSQL持久性单元.解决方案只是在persistence.xml持久性单元中指定实体.
The problem was with my persistence unit. By default ALL the Entity classes are included, So both my NoSQL and SQL entities were being passed to both the SQL and the NoSQL persistence units. The solution was just to specify the entities inside the persistence.xml persistence unit.
<persistence-unit name="Dastrax_NoSQL_PU" transaction-type="JTA">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<class>declare_your_entity_1</class>
<class>declare_your_entity_2</class>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties>
<property name="eclipselink.target-database" value="org.eclipse.persistence.nosql.adapters.mongo.MongoPlatform"/>
<property name="eclipselink.nosql.connection-spec" value="org.eclipse.persistence.nosql.adapters.mongo.MongoConnectionSpec"/>
<property name="eclipselink.nosql.property.mongo.port" value="27017"/>
<property name="eclipselink.nosql.property.mongo.host" value="localhost"/>
<property name="eclipselink.nosql.property.mongo.db" value="dev"/>
<property name="eclipselink.logging.level" value="FINEST"/>
</properties>
</persistence-unit>
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