如何定义一个请求作用域的JAX-RS ParamConverterProvider？

Question

我正在尝试编写一个已分配请求范围的ParamConverterProvider。此FilterModelProvider应为特定类型创建ParamConverter，但必须知道目标JAX-RS资源。因此，我想让JAX-RS为我注入一个ResourceInfo的实例。

@Provider
@RequestScoped
public class FilterModelProvider implements ParamConverterProvider {

  @Context
  private ResourceInfo resourceInfo;

  @Override
  public <T> ParamConverter<T> getConverter(Class<T> rawType, Type genericType, Annotation[] annotations) {

    Class<?> resourceClass = resourceInfo.getResourceClass();

    // returns the param for a specific type but accesses the resourceInfo
  }
}

似乎这个实现确实适用于JEE7环境。当我在Arquillian或Wildfly中运行代码时，我会收到类似

的错误

org.jboss.weld.context.ContextNotActiveException: WELD-001303: No active contexts for scope type javax.enterprise.context.RequestScoped
    at org.jboss.weld.manager.BeanManagerImpl.getContext(BeanManagerImpl.java:708)
    at org.jboss.weld.bean.ContextualInstanceStrategy$DefaultContextualInstanceStrategy.getIfExists(ContextualInstanceStrategy.java:90)
    at org.jboss.weld.bean.ContextualInstanceStrategy$CachingContextualInstanceStrategy.getIfExists(ContextualInstanceStrategy.java:165)
    at org.jboss.weld.bean.ContextualInstance.getIfExists(ContextualInstance.java:63)
    at org.jboss.weld.bean.proxy.ContextBeanInstance.getInstance(ContextBeanInstance.java:83)
    at org.jboss.weld.bean.proxy.ProxyMethodHandler.getInstance(ProxyMethodHandler.java:125)
    at com.adcubum.osl.foundation.rest.filtering.FilterModelProvider$Proxy$_$$_WeldClientProxy.getConverter(Unknown Source)
    at org.glassfish.jersey.server.internal.inject.ParamConverterFactory.getConverter(ParamConverterFactory.java:93)
    at org.glassfish.jersey.server.internal.inject.MultivaluedParameterExtractorFactory.process(MultivaluedParameterExtractorFactory.java:120)
    at org.glassfish.jersey.server.internal.inject.MultivaluedParameterExtractorFactory.get(MultivaluedParameterExtractorFactory.java:100)
    at org.glassfish.jersey.server.internal.inject.AbstractValueFactoryProvider.get(AbstractValueFactoryProvider.java:106)
    at org.glassfish.jersey.server.internal.inject.QueryParamValueFactoryProvider.createValueFactory(QueryParamValueFactoryProvider.java:116)
    at org.glassfish.jersey.server.internal.inject.QueryParamValueFactoryProvider.createValueFactory(QueryParamValueFactoryProvider.java:59)
    at org.glassfish.jersey.server.internal.inject.AbstractValueFactoryProvider.getValueFactory(AbstractValueFactoryProvider.java:134)
    at org.glassfish.jersey.server.spi.internal.ParameterValueHelper.getValueFactory(ParameterValueHelper.java:176)
    at org.glassfish.jersey.server.spi.internal.ParameterValueHelper.createValueProviders(ParameterValueHelper.java:140)
    at org.glassfish.jersey.server.model.Invocable.getValueProviders(Invocable.java:320)
    at org.glassfish.jersey.server.model.ResourceMethodValidator.checkValueProviders(ResourceMethodValidator.java:165)
    at org.glassfish.jersey.server.model.ResourceMethodValidator.checkMethod(ResourceMethodValidator.java:106)
    at org.glassfish.jersey.server.model.ResourceMethodValidator.visitJaxrsResourceMethod(ResourceMethodValidator.java:102)
    at org.glassfish.jersey.server.model.ResourceMethodValidator.visitResourceMethod(ResourceMethodValidator.java:92)
    at org.glassfish.jersey.server.model.ResourceMethod.accept(ResourceMethod.java:873)
    at org.glassfish.jersey.server.model.ComponentModelValidator.validateWithErrors(ComponentModelValidator.java:161)
    at org.glassfish.jersey.server.model.ComponentModelValidator.validateWithErrors(ComponentModelValidator.java:167)
    at org.glassfish.jersey.server.model.ComponentModelValidator.validateWithErrors(ComponentModelValidator.java:167)
    at org.glassfish.jersey.server.model.ComponentModelValidator.validateWithErrors(ComponentModelValidator.java:167)
    at org.glassfish.jersey.server.model.ComponentModelValidator.access$000(ComponentModelValidator.java:90)
    at org.glassfish.jersey.server.model.ComponentModelValidator$1.run(ComponentModelValidator.java:151)
    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.server.model.ComponentModelValidator.validate(ComponentModelValidator.java:146)
    at org.glassfish.jersey.server.ApplicationHandler.initialize(ApplicationHandler.java:548)
    at org.glassfish.jersey.server.ApplicationHandler.access$500(ApplicationHandler.java:182)
    at org.glassfish.jersey.server.ApplicationHandler$3.call(ApplicationHandler.java:348)
    at org.glassfish.jersey.server.ApplicationHandler$3.call(ApplicationHandler.java:345)
    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.processWithException(Errors.java:255)
    at org.glassfish.jersey.server.ApplicationHandler.<init>(ApplicationHandler.java:345)
    at org.glassfish.jersey.servlet.WebComponent.<init>(WebComponent.java:390)
    at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:170)
    at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:362)
    at javax.servlet.GenericServlet.init(GenericServlet.java:244)
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1583)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1382)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5732)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:5977)
    at com.sun.enterprise.web.WebModule.start(WebModule.java:691)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:1041)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:1024)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:747)
    at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:2286)
    at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1932)
    at com.sun.enterprise.web.WebApplication.start(WebApplication.java:139)
    at org.glassfish.internal.data.EngineRef.start(EngineRef.java:122)
    at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:291)
    at org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:352)
    at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:500)
    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:539)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:535)
    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:534)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$3.run(CommandRunnerImpl.java:565)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$3.run(CommandRunnerImpl.java:557)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:360)
    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.access$1300(CommandRunnerImpl.java:109)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1846)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1722)
    at com.sun.enterprise.admin.cli.embeddable.DeployerImpl.deploy(DeployerImpl.java:133)
    at com.sun.enterprise.admin.cli.embeddable.DeployerImpl.deploy(DeployerImpl.java:109)
    at org.jboss.arquillian.container.glassfish.embedded_3_1.GlassFishContainer.deploy(GlassFishContainer.java:195)
    at org.jboss.arquillian.container.impl.client.container.ContainerDeployController$3.call(ContainerDeployController.java:161)
    at org.jboss.arquillian.container.impl.client.container.ContainerDeployController$3.call(ContainerDeployController.java:128)
    at org.jboss.arquillian.container.impl.client.container.ContainerDeployController.executeOperation(ContainerDeployController.java:271)
    at org.jboss.arquillian.container.impl.client.container.ContainerDeployController.deploy(ContainerDeployController.java:127)
    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.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:94)
    at org.jboss.arquillian.core.impl.EventContextImpl.invokeObservers(EventContextImpl.java:99)
    at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:81)
    at org.jboss.arquillian.container.impl.client.ContainerDeploymentContextHandler.createDeploymentContext(ContainerDeploymentContextHandler.java:78)
    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.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:94)
    at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:88)
    at org.jboss.arquillian.container.impl.client.ContainerDeploymentContextHandler.createContainerContext(ContainerDeploymentContextHandler.java:57)
    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.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:94)
    at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:88)
    at org.jboss.arquillian.container.impl.client.container.DeploymentExceptionHandler.verifyExpectedExceptionDuringDeploy(DeploymentExceptionHandler.java:50)
    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.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:94)
    at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:88)
    at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:145)
    at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:116)
    at org.jboss.arquillian.core.impl.EventImpl.fire(EventImpl.java:67)
    at org.jboss.arquillian.container.impl.client.container.ContainerDeployController$1.perform(ContainerDeployController.java:95)
    at org.jboss.arquillian.container.impl.client.container.ContainerDeployController$1.perform(ContainerDeployController.java:80)
    at org.jboss.arquillian.container.impl.client.container.ContainerDeployController.forEachDeployment(ContainerDeployController.java:263)
    at org.jboss.arquillian.container.impl.client.container.ContainerDeployController.forEachManagedDeployment(ContainerDeployController.java:239)
    at org.jboss.arquillian.container.impl.client.container.ContainerDeployController.deployManaged(ContainerDeployController.java:79)
    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.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:94)
    at org.jboss.arquillian.core.impl.EventContextImpl.invokeObservers(EventContextImpl.java:99)
    at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:81)
    at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:145)
    at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:116)
    at org.jboss.arquillian.core.impl.EventImpl.fire(EventImpl.java:67)
    at org.jboss.arquillian.container.test.impl.client.ContainerEventController.execute(ContainerEventController.java:101)
    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.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:94)
    at org.jboss.arquillian.core.impl.EventContextImpl.invokeObservers(EventContextImpl.java:99)
    at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:81)
    at org.jboss.arquillian.test.impl.TestContextHandler.createClassContext(TestContextHandler.java:92)
    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.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:94)
    at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:88)
    at org.jboss.arquillian.test.impl.TestContextHandler.createSuiteContext(TestContextHandler.java:73)
    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.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:94)
    at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:88)
    at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:145)
    at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:116)
    at org.jboss.arquillian.test.impl.EventTestRunnerAdaptor.beforeClass(EventTestRunnerAdaptor.java:87)
    at org.jboss.arquillian.junit.Arquillian$2.evaluate(Arquillian.java:201)
    at org.jboss.arquillian.junit.Arquillian.multiExecute(Arquillian.java:426)
    at org.jboss.arquillian.junit.Arquillian.access$200(Arquillian.java:54)
    at org.jboss.arquillian.junit.Arquillian$3.evaluate(Arquillian.java:218)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.jboss.arquillian.junit.Arquillian.run(Arquillian.java:166)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

我错过了什么吗？我究竟做错了什么？ ParamConverterProvider可以不是请求作用域吗？

Answer 1

当JAX-RS应用程序启动时，会创建一次

ParamConverterProvider。将它们视为应用程序上下文中的单例。这非常有意义，因为它们不会在http请求之间发生变化。

因此，没有影响用RequestScoped标记它们。