UnserializableDependencyException:WELD-001413:bean 声明了一个钝化作用域,但具有不支持钝化的依赖项

UnserializableDependencyException: WELD-001413: The bean declares a passivating scope but has a non-passivation-capable dependency

我有以下 CDI 托管 bean:

@Named
@SessionScoped
public class InfoPageController implements Serializable {

    @Inject
    private InfoPageMapper mapper;

}

它在部署到 GlassFish 4.1 期间抛出以下异常:

Exception while loading the app : CDI deployment failure:WELD-001413: The bean Managed Bean [class de.triaconsulting.cashyourgame.fe.controller.InfoPageController] with qualifiers [@Default @Any @Named] declares a passivating scope but has a non-passivation-capable dependency Managed Bean [class de.triaconsulting.cashyourgame.fe.mapper.InfoPageMapper] with qualifiers [@Any @Default]
org.jboss.weld.exceptions.UnserializableDependencyException: WELD-001413: The bean Managed Bean [class de.triaconsulting.cashyourgame.fe.controller.InfoPageController] with qualifiers [@Default @Any @Named] declares a passivating scope but has a non-passivation-capable dependency Managed Bean [class de.triaconsulting.cashyourgame.fe.mapper.InfoPageMapper] with qualifiers [@Any @Default]
    at org.jboss.weld.bootstrap.Validator.validateInjectionPointPassivationCapable(Validator.java:477)
    at org.jboss.weld.bootstrap.Validator.validateInjectionPointForDeploymentProblems(Validator.java:395)
    at org.jboss.weld.bootstrap.Validator.validateInjectionPoint(Validator.java:291)
    at org.jboss.weld.bootstrap.Validator.validateGeneralBean(Validator.java:134)
    at org.jboss.weld.bootstrap.Validator.validateRIBean(Validator.java:165)
    at org.jboss.weld.bootstrap.Validator.validateBean(Validator.java:529)
    at org.jboss.weld.bootstrap.Validator.validateBeans(Validator.java:515)
    at org.jboss.weld.bootstrap.Validator.validateDeployment(Validator.java:490)
    at org.jboss.weld.bootstrap.WeldStartup.validateBeans(WeldStartup.java:419)
    at org.jboss.weld.bootstrap.WeldBootstrap.validateBeans(WeldBootstrap.java:90)
    at org.glassfish.weld.WeldDeployer.event(WeldDeployer.java:225)
    at org.glassfish.kernel.event.EventsImpl.send(EventsImpl.java:131)
    at org.glassfish.internal.data.ApplicationInfo.load(ApplicationInfo.java:328)
    at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:496)
    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.run(CommandRunnerImpl.java:539)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.run(CommandRunnerImpl.java:535)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:356)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.execute(CommandRunnerImpl.java:534)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.run(CommandRunnerImpl.java:565)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.run(CommandRunnerImpl.java:557)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:356)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:556)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1464)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.access00(CommandRunnerImpl.java:109)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1846)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1722)
    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.StaticHttpHandlerBase.service(StaticHttpHandlerBase.java:189)
    at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167)
    at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:201)
    at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:175)
    at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)
    at org.glassfish.grizzly.filterchain.ExecutorResolver.execute(ExecutorResolver.java:119)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)
    at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
    at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:561)
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access0(WorkerThreadIOStrategy.java:56)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545)
    at java.lang.Thread.run(Thread.java:745)

这是怎么引起的,我该如何解决?

根据您的服务器错误消息,检查de.triaconsulting.cashyourgame.fe.mapper.InfoPageMapper。 InfoPageMapper 是否实现了 Serializable?

您在 InfoPageController 对象的会话范围内注入了 InfoPageMapper 对象。 会话范围对象及其成员需要序列化。所以 InfoPageMapper 对象必须能够序列化。

所以 InfoPageMapper 必须实现可序列化接口。

如果不想在InfoPageController中序列化InfoPageMapper对象,可以在该变量中设置transient关键字。

先解法,后解释:

最简单的方法是将 InfoPageController 中的字段 InfoPageMapper mapper 标记为 transient:

@Named
@SessionScoped
public class InfoPageController implements Serializable {

    @Inject
    transient private InfoPageMapper mapper;

现在解释:

错误消息以可读的语言说明了这一点:

The bean InfoPageController, which is SessionScoped, must be serializable, but it requires InfoPageMapper, which is not serializable nor transient - it is not possible to determine how to serialize InfoPageController.

在 CDI 中,有一些范围(最常见的是 SessionScope)要求 bean 是可序列化的——主要是因为它们以某种方式连接到 HTTP 会话,它可以包含更多适合内存的对象,并且不时服务器可能需要将它们交换到磁盘。

您似乎明白了,因为 InfoPageController 实现了 Serializable。但根据 Java 序列化原则,这还不够。您需要确保 Serializable class 的所有成员字段都是以下之一: - 原始类型(int,boolean) - 可序列化的对象(所有序列化规则递归应用) - 该字段标有关键字 transient(与 private 关键字处于同一级别)

CDI 的诀窍是您可以将所有注入的字段标记为瞬态,因为当对象从磁盘反序列化到内存时,它们会再次注入。因此,您不会丢失临时对象,否则在反序列化时该对象将为 null,因为它之前没有存储到磁盘。

另一种解决方案是使注入的 bean InfoPageMapper 也可序列化。但是随后问题可能会随着字段注入到 InfoPageMapper 中而递归重复。 Transient 关键字解决了您的问题,并且不会强制其他 benas 在不需要时可序列化。