java - Jersey RESTful 服务 500 错误(请求为空)

Question

我是 REST 服务的新手，我想使用 Jersey Test Framework 进行测试。配置似乎没问题(不为空)，但调试器显示请求为空。更改 target() 方法中的路径没有任何效果。找到了很多答案，但没有帮助。那么为什么请求可以为空呢？

TestReportResource.java

public class TestReportResource extends JerseyTest {
    private ETS tmEts;
    private ETS suEts;
    private ReportService mockReportService;
    private ReportResource reportResource;
    private ReportResource reportResourceNew;
    private MapperFacade mapper;
    private ReportServiceJerseyMockTest mockReportServiceJersey;

    @Before
    public void init() {
        this.tmEts = TestUtils.loginAs(TestUtils.PURE_TM, TestUtils.PASSWORD_COMMON);
        this.suEts = TestUtils.loginAs(TestUtils.PURE_SU, TestUtils.PASSWORD_COMMON);
        this.mapper = EntityMapperFactory.getMapper();

        this.mockReportService = mock(ReportService.class);
        this.reportResource = new ReportResource(this.mockReportService, this.mapper);
    }


    @Override
    protected TestContainerFactory getTestContainerFactory() throws TestContainerException {
        return new JdkHttpServerTestContainerFactory();
    }

    @Override
    protected Application configure() {
        this.mockReportServiceJersey = new ReportServiceJerseyMockTest(); **//fields are here, because init() initiates later than configure()**
        this.reportResource = new ReportResource(this.mockReportServiceJersey, this.mapper);

        ResourceConfig config = new ResourceConfig(ReportResource.class);

        AbstractBinder binder = new AbstractBinder() {
            @Override
            protected void configure() {
                bindFactory(ReportServiceJerseyMockTest.class).to(IReportService.class);
            }
        };
        config.register(binder);
        return config;
    }


    @Test
    public void testGetProjectManagersRestJersey() {

        List<ManagerUserEntity> testList = (List<ManagerUserEntity>) new ReportServiceJerseyMockTest().getProjectManagers(tmEts, "login");

        ManagerUserEntity managerUserEntity = target("/reports/project-managers").request().get(ManagerUserEntity.class); **// request equals to null**

        assertEquals(testList, mapper.mapAsList(List of entities received from ReportResource.getProjectManagers, ManagerUserEntity.class));
        (not ended)
    }

}

ReportResource.java - 正在测试的资源类

@Path("/reports/")
public class ReportResource {
    @Inject
    private IReportService reportService;
    private MapperFacade mapper;


    @GET
    @Path("project-managers")
    @Produces(MediaType.APPLICATION_JSON)
    public Collection<ManagerUserDTO> getProjectManagers(@Context  HttpServletRequest request, 
                                 @DefaultValue("All") 
                                 @QueryParam("lmLogin") String lmLogin) {

        ETS ets = (ETS) request.getAttribute("ets"); **// request equals null**

        Collection<ManagerUserEntity> entities = this.reportService.getProjectManagers(ets, lmLogin);

        return mapper.mapAsList(entities, ManagerUserDTO.class);
    }

}

堆栈跟踪

javax.ws.rs.InternalServerErrorException: HTTP 500 Internal Server Error
    at org.glassfish.jersey.client.JerseyInvocation.convertToException(JerseyInvocation.java:1020)
    at org.glassfish.jersey.client.JerseyInvocation.translate(JerseyInvocation.java:816)
    at org.glassfish.jersey.client.JerseyInvocation.access$700(JerseyInvocation.java:92)
    at org.glassfish.jersey.client.JerseyInvocation$2.call(JerseyInvocation.java:700)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:228)
    at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:444)
    at org.glassfish.jersey.client.JerseyInvocation.invoke(JerseyInvocation.java:696)
    at org.glassfish.jersey.client.JerseyInvocation$Builder.method(JerseyInvocation.java:420)
    at org.glassfish.jersey.client.JerseyInvocation$Builder.get(JerseyInvocation.java:316)
    at test.rest.TestReportResource.testGetProjectManagersRestJersey(TestReportResource.java:104)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:78)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:212)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)

Answer 1

所以有几个问题

首先，JerseyTest already has a @Before method它会调用您的 configure 方法来创建 Jersey 应用程序。此@Before 在您的 @Before 之前调用，因此任何应用程序配置都不应该在此方法中完成。可以用于 @Test 方法中使用的内容。

其次，您还没有配置您的MapperFacade。所以你的资源类永远不会得到它。我想这就是 500 的原因(主要原因是 NPE)。所以做两件事

1. 在JerseyTest的configure方法中初始化MapperFacade，然后在configure中进行配置> AbstractBinder

   的方法

   final MapperFacade mapper = EntityMapper.getMapper();
   AbstractBinder binder = new AbstractBinder() {
       @Override
       protected void configure() {
           ...
           bind(mapper).to(MapperFacade.class);
       }
   };
   

2. 在资源类中添加@Inject注解

    public class ReportResource {
        @Inject
        private MapperFacade mapper;
   

顺便说一句，当收到 500 服务器错误并且没有堆栈跟踪(对于真正的异常)时，通常会被框架吞并并转换为特定于框架的异常，这没有太大帮助，就像你的情况一样。在这种情况下，我只需添加一个调试 ExceptionMapper 来打印堆栈跟踪。这应该会给你一些信息

@Provider
public static class DebugMapper implements ExceptionMapper<Throwable> {
    @Overrride
    public Response toResponse(Throwable e) {
        e.printStackTrace();
        return Response.serverError().build();
    }
}

@Override
public Application configure() {
    ResourceConfig config = new ResourceConfig(..);
    config.register(DebugMapper.class);
}