我正在使用JAX-RS和EJB。我正在尝试注入一个EntityManager，但它失败了NullPointerException。
的persistence.xml：
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="dummy-pu" transaction-type="JTA">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<jta-data-source>jdbc/dummy</jta-data-source>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties>
<property name="javax.persistence.jdbc.url" value="jdbc:derby://localhost:1527/dummy"/>
<property name="javax.persistence.jdbc.password" value="APP"/>
<property name="javax.persistence.jdbc.driver" value="org.apache.derby.jdbc.ClientDriver"/>
<property name="javax.persistence.jdbc.user" value="APP"/>
<property name="javax.persistence.schema-generation.database.action" value="drop-and-create"/>
</properties>
</persistence-unit>
</persistence>
这是Bean：
@Stateless(name = "greetingBean", mappedName = "greeting")
@Path("/greeting-service")
@Remote(GreetingService.class)
public class GreetingBean implements GreetingService {
@PersistenceContext
private EntityManager em;
@GET
@Produces(MediaType.APPLICATION_JSON)
@Override
public Greeting greet() {
return new Greeting(new Random().nextInt(),
"Minions ipsum jeje hahaha poulet tikka masala tatata bala tu. Po kass tatata bala tu poopayee la bodaaa tatata bala tu underweaaar hahaha.");
}
@POST
@Consumes(MediaType.APPLICATION_JSON)
@Override
public void probe(Greeting greeting) {
em.persist(new Item()); // GreetingBean.java:45
}
}
我正在复制堆栈跟踪：
＆＃34;根异常是javax.naming.NameNotFoundException：没有对象绑定到名称java：module / GreetingBean＆＃34;
Warning: An instance of EJB class, hu.igergo.java.dummy.ejb.services.GreetingBean, could not be looked up using simple form name. Attempting to look up using the fully-qualified form name.
javax.naming.NamingException: Lookup failed for 'java:module/GreetingBean' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl, java.naming.factory.url.pkgs=com.sun.enterprise.naming} [Root exception is javax.naming.NameNotFoundException: No object bound to name java:module/GreetingBean]
at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:491)
at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:438)
at javax.naming.InitialContext.lookup(InitialContext.java:411)
at javax.naming.InitialContext.lookup(InitialContext.java:411)
at org.glassfish.jersey.gf.ejb.EjbComponentProvider.lookupSimpleForm(EjbComponentProvider.java:318)
at org.glassfish.jersey.gf.ejb.EjbComponentProvider.lookup(EjbComponentProvider.java:308)
at org.glassfish.jersey.gf.ejb.EjbComponentProvider.access$000(EjbComponentProvider.java:85)
at org.glassfish.jersey.gf.ejb.EjbComponentProvider$EjbFactory.provide(EjbComponentProvider.java:105)
at org.jvnet.hk2.internal.FactoryCreator.create(FactoryCreator.java:96)
at org.jvnet.hk2.internal.SystemDescriptor.create(SystemDescriptor.java:448)
at org.jvnet.hk2.internal.PerLookupContext.findOrCreate(PerLookupContext.java:69)
at org.jvnet.hk2.internal.Utilities.createService(Utilities.java:2204)
at org.jvnet.hk2.internal.ServiceLocatorImpl.getService(ServiceLocatorImpl.java:579)
at org.jvnet.hk2.internal.ServiceLocatorImpl.getService(ServiceLocatorImpl.java:566)
at org.glassfish.jersey.internal.inject.Injections.getOrCreate(Injections.java:172)
at org.glassfish.jersey.server.model.MethodHandler$ClassBasedMethodHandler.getInstance(MethodHandler.java:185)
at org.glassfish.jersey.server.internal.routing.PushMethodHandlerRouter.apply(PushMethodHandlerRouter.java:105)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:118)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:121)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:121)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:121)
at org.glassfish.jersey.server.internal.routing.RoutingStage.apply(RoutingStage.java:102)
at org.glassfish.jersey.server.internal.routing.RoutingStage.apply(RoutingStage.java:62)
at org.glassfish.jersey.process.internal.Stages.process(Stages.java:197)
at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:215)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:198)
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:946)
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:323)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:372)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:335)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:218)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188)
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:745)
Caused by: javax.naming.NameNotFoundException: No object bound to name java:module/GreetingBean
at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.lookup(GlassfishNamingManagerImpl.java:741)
at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.lookup(GlassfishNamingManagerImpl.java:715)
at com.sun.enterprise.naming.impl.JavaURLContext.lookup(JavaURLContext.java:167)
at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:471)
... 63 more
Severe: javax.naming.NamingException: Lookup failed for 'java:module/GreetingBean!hu.igergo.java.dummy.ejb.services.GreetingBean' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl, java.naming.factory.url.pkgs=com.sun.enterprise.naming} [Root exception is javax.naming.NameNotFoundException: No object bound to name java:module/GreetingBean!hu.igergo.java.dummy.ejb.services.GreetingBean]
at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:491)
at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:438)
at javax.naming.InitialContext.lookup(InitialContext.java:411)
at javax.naming.InitialContext.lookup(InitialContext.java:411)
at org.glassfish.jersey.gf.ejb.EjbComponentProvider.lookupFullyQualifiedForm(EjbComponentProvider.java:323)
at org.glassfish.jersey.gf.ejb.EjbComponentProvider.lookup(EjbComponentProvider.java:312)
at org.glassfish.jersey.gf.ejb.EjbComponentProvider.access$000(EjbComponentProvider.java:85)
at org.glassfish.jersey.gf.ejb.EjbComponentProvider$EjbFactory.provide(EjbComponentProvider.java:105)
at org.jvnet.hk2.internal.FactoryCreator.create(FactoryCreator.java:96)
at org.jvnet.hk2.internal.SystemDescriptor.create(SystemDescriptor.java:448)
at org.jvnet.hk2.internal.PerLookupContext.findOrCreate(PerLookupContext.java:69)
at org.jvnet.hk2.internal.Utilities.createService(Utilities.java:2204)
at org.jvnet.hk2.internal.ServiceLocatorImpl.getService(ServiceLocatorImpl.java:579)
at org.jvnet.hk2.internal.ServiceLocatorImpl.getService(ServiceLocatorImpl.java:566)
at org.glassfish.jersey.internal.inject.Injections.getOrCreate(Injections.java:172)
at org.glassfish.jersey.server.model.MethodHandler$ClassBasedMethodHandler.getInstance(MethodHandler.java:185)
at org.glassfish.jersey.server.internal.routing.PushMethodHandlerRouter.apply(PushMethodHandlerRouter.java:105)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:118)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:121)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:121)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:121)
at org.glassfish.jersey.server.internal.routing.RoutingStage.apply(RoutingStage.java:102)
at org.glassfish.jersey.server.internal.routing.RoutingStage.apply(RoutingStage.java:62)
at org.glassfish.jersey.process.internal.Stages.process(Stages.java:197)
at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:215)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:198)
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:946)
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:323)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:372)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:335)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:218)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188)
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:745)
Caused by: javax.naming.NameNotFoundException: No object bound to name java:module/GreetingBean!hu.igergo.java.dummy.ejb.services.GreetingBean
at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.lookup(GlassfishNamingManagerImpl.java:741)
at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.lookup(GlassfishNamingManagerImpl.java:715)
at com.sun.enterprise.naming.impl.JavaURLContext.lookup(JavaURLContext.java:167)
at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:471)
... 63 more
Warning: StandardWrapperValve[hu.igergo.java.dummy.ejb.RestApplication]: Servlet.service() for servlet hu.igergo.java.dummy.ejb.RestApplication threw exception
java.lang.NullPointerException
at hu.igergo.java.dummy.ejb.services.GreetingBean.probe(GreetingBean.java:45)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.glassfish.jersey.gf.ejb.EjbComponentProvider$2.invoke(EjbComponentProvider.java:261)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:125)
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$VoidOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:136)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:91)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:346)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:341)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:101)
at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:224)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:198)
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:946)
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:323)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:372)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:335)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:218)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188)
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:745)
我正在使用：
我做错了什么？
修改
如果我通过单个客户端尝试它，它运行良好。
Context ctx = new InitialContext();
GreetingService bean = (GreetingService) ctx.lookup(
// "java:global/dummy-backend-ear/dummy-backend-ejb-1.0-SNAPSHOT/greetingBean"
// "java:global/dummy-backend-ear/dummy-backend-ejb-1.0-SNAPSHOT/greetingBean!hu.igergo.java.dummy.interfaces.services.GreetingService"
"greeting"
// "greeting#hu.igergo.java.dummy.interfaces.services.GreetingService"
);
ctx.close();
bean.probe(new Greeting());