为什么我的Singleton StartUp EJB没有在我的Stateful Bean中注入或找到？

时间：2015-09-18 18:36:53

标签： java-ee dependency-injection ejb

我有4个EJB：

@Singleton
@Startup
@Local
public class TelegramTable {

@Startup
@Local
@Singleton
public class TelegramQueue extends GenericBean {

@Singleton
@Startup
@Local
public class JsonGatewayClient extends GenericBean implements GatewayClient {

和

@Stateful
@Local
public class ScannerHandler implements GatewayClient {

我可以成功将 TelegramTable 和 TelegramQueue 注入 JsonGatewayClient 对象或 ScannerHandler 对象。

但是如果尝试将 JsonGatewayClient 注入 ScannerHandler ，那么我的server.log中会出现以下异常：

[2015-09-18T20:25:15.077+0200] [glassfish 4.0] [SEVERE] [] [javax.enterprise.system.tools.deployment.dol] [tid: _ThreadID=36 _ThreadName=admin-listener(4)] [timeMillis: 1442600715077] [levelValue: 1000] [[
  Cannot resolve reference Local ejb-ref name=de.topmedicare.websocket.ScannerHandler/jsonGatewayClient,Local 3.x interface =de.topmedicare.websocket.JsonGatewayClient,ejb-link=null,lookup=,mappedName=,jndi-name=,refType=Session]]

[2015-09-18T20:25:15.077+0200] [glassfish 4.0] [SEVERE] [] [javax.enterprise.system.core] [tid: _ThreadID=36 _ThreadName=admin-listener(4)] [timeMillis: 1442600715077] [levelValue: 1000] [[
  Exception while deploying the app [mes-ear]]]

[2015-09-18T20:25:15.077+0200] [glassfish 4.0] [SEVERE] [NCLS-CORE-00026] [javax.enterprise.system.core] [tid: _ThreadID=36 _ThreadName=admin-listener(4)] [timeMillis: 1442600715077] [levelValue: 1000] [[
  Exception during lifecycle processing
java.lang.RuntimeException: Cannot resolve reference Local ejb-ref name=de.topmedicare.websocket.ScannerHandler/jsonGatewayClient,Local 3.x interface =de.topmedicare.websocket.JsonGatewayClient,ejb-link=null,lookup=,mappedName=,jndi-name=,refType=Session
        at com.sun.enterprise.deployment.util.ComponentValidator.accept(ComponentValidator.java:374)
        at org.glassfish.ejb.deployment.util.EjbBundleValidator.accept(EjbBundleValidator.java:409)
        at org.glassfish.ejb.deployment.descriptor.EjbDescriptor.visit(EjbDescriptor.java:2823)
        at org.glassfish.ejb.deployment.descriptor.EjbDescriptor.visit(EjbDescriptor.java:2811)
        at org.glassfish.ejb.deployment.util.EjbBundleValidator.accept(EjbBundleValidator.java:115)
        at com.sun.enterprise.deployment.BundleDescriptor.visit(BundleDescriptor.java:621)
        at org.glassfish.ejb.deployment.descriptor.EjbBundleDescriptorImpl.visit(EjbBundleDescriptorImpl.java:757)
        at com.sun.enterprise.deployment.util.ApplicationValidator.accept(ApplicationValidator.java:116)
        at com.sun.enterprise.deployment.BundleDescriptor.visit(BundleDescriptor.java:621)
        at com.sun.enterprise.deployment.archivist.ApplicationArchivist.validate(ApplicationArchivist.java:703)
        at com.sun.enterprise.deployment.archivist.ApplicationArchivist.openWith(ApplicationArchivist.java:248)
        at com.sun.enterprise.deployment.archivist.ApplicationFactory.openWith(ApplicationFactory.java:232)
        at org.glassfish.javaee.core.deployment.DolProvider.processDOL(DolProvider.java:188)
        at org.glassfish.javaee.core.deployment.DolProvider.load(DolProvider.java:222)
        at org.glassfish.javaee.core.deployment.DolProvider.load(DolProvider.java:96)
        at com.sun.enterprise.v3.server.ApplicationLifecycle.loadDeployer(ApplicationLifecycle.java:878)
        at com.sun.enterprise.v3.server.ApplicationLifecycle.setupContainerInfos(ApplicationLifecycle.java:818)
        at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:374)
        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:360)
        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 org.glassfish.admin.rest.resources.admin.CommandResource.executeCommand(CommandResource.java:396)
        at org.glassfish.admin.rest.resources.admin.CommandResource.execCommandSimpInMultOut(CommandResource.java:234)
        at sun.reflect.GeneratedMethodAccessor135.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
        at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:125)
        at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:152)
        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.grizzly2.httpserver.GrizzlyHttpContainer.service(GrizzlyHttpContainer.java:331)
        at org.glassfish.admin.rest.adapter.JerseyContainerCommandService$3.service(JerseyContainerCommandService.java:165)
        at org.glassfish.admin.rest.adapter.RestAdapter.service(RestAdapter.java:181)
        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:745)
]]

[2015-09-18T20:25:15.081+0200] [glassfish 4.0] [SEVERE] [] [javax.enterprise.system.core] [tid: _ThreadID=36 _ThreadName=admin-listener(4)] [timeMillis: 1442600715081] [levelValue: 1000] [[
  Exception while deploying the app [mes-ear] : Cannot resolve reference Local ejb-ref name=de.topmedicare.websocket.ScannerHandler/jsonGatewayClient,Local 3.x interface =de.topmedicare.websocket.JsonGatewayClient,ejb-link=null,lookup=,mappedName=,jndi-name=,refType=Session]]

server.log中的消息表明找不到 JsonGatewayClient EJB，但找到了 TelegramTable 对象。 TelegramTable 和 JsonGatewayClient 的设置是相同的....（ Singleton ， StartUp ，< EM>本地）

不知道它是否重要：使用Glassfish 4.0

有什么建议吗？

2 个答案:

答案 0 :(得分：2)

如果我使用

ng-repeat
ScannerHandler 中的

比它有效。 似乎我必须使用 GatewayClient 接口。 （也许有人可以解释为什么？）

此致 裘

答案 1 :(得分：1)

在大多数情况下，EJB 3容器依赖于约定并注入唯一的现有EJB 3实现。这很方便，因为在绝大多数情况下，您只有一个接口的单个​​实现。因为它是唯一可能的选择，所以额外的配置不会提供任何附加价值。它不会是DRY。

但是如果你得到一个额外的接口实现 - 这种方法就会破坏。

composer update

该服务的任何其他实现都会通过约定打破依赖注入。

@Local
public interface Service {

    public String getMessage();
}

@Stateless
public class DefaultService implements Service {

    public String getMessage() {
        return "Hello from: " + this.getClass().getName();
    }
}

现在您有两种选择来解决这个问题：
1.）使用注释：

@Stateless
public class SpecificService implements Service {
     public String getMessage() {
        return "Hello from: " + this.getClass().getName();
    }
}

2。）使用ejb-jar.xml中的XML配置文件：

@Stateless
@WebService
public class AnnotatedClient {
    // define the service to use here (static)
    @EJB(beanName="DefaultService")
    private Service service;

    public String getHello() {
        return this.service.getMessage();
    }
}

和定义要在

中使用的实现的XML配置文件 
@Stateless
@WebService
public class XMLClient {

    @EJB
    private Service service;

    public String getHello() {
        return this.service.getMessage();
    }
}

希望有所帮助

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