Quarkus 中的 JAX-RS 子资源问题 [英] JAX-RS subresource issue in Quarkus

问题描述

我尝试自己品尝 Quarkus.

I try to taste Quarkus myself.

并从我的 Helidon-sample 到 Quarkus，但它没有按预期工作.

And migrate a working sample from my Helidon-sample to Quarkus, but it does not work as expected.

我遇到了一个例外，例如保存帖子的评论.

I got an exception like when save comments of an post.

 curl -X POST http://localhost:8080/posts/ffba7fa8-d804-403c-8812-9ab2a0d3c16b/comments -d "{\"content\":\"test comments\"}" -H "Content-Type:application/json"

2019-09-06 18:20:35,405 WARN  [io.qua.arc.run.ArcRecorder] (executor-thread-1) Bean matching class com.example.CommentResource was marked as unused and removed during build.
Extensions can eliminate false positives using:
        - a custom UnremovableBeanBuildItem
        - AdditionalBeanBuildItem(false, beanClazz)
2019-09-06 18:20:35,499 ERROR [io.und.req.io] (executor-thread-1) Exception handling request 98229ff8-08fc-43da-aa3b-3ffc14d5b439-1 to /posts/8059eb1d-5d26-4eb3-b9df-39151a5f71f5/comments: org.jboss.resteasy.spi.UnhandledException: java.lang.NullPointerException
        at org.jboss.resteasy.core.ExceptionHandler.handleApplicationException(ExceptionHandler.java:106)
        at org.jboss.resteasy.core.ExceptionHandler.handleException(ExceptionHandler.java:372)
        at org.jboss.resteasy.core.SynchronousDispatcher.writeException(SynchronousDispatcher.java:209)
        at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:496)
        at org.jboss.resteasy.core.SynchronousDispatcher.lambda$invoke$4(SynchronousDispatcher.java:252)
        at org.jboss.resteasy.core.SynchronousDispatcher.lambda$preprocess$0(SynchronousDispatcher.java:153)
        at org.jboss.resteasy.core.interception.jaxrs.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:363)
        at org.jboss.resteasy.core.SynchronousDispatcher.preprocess(SynchronousDispatcher.java:156)
        at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:238)
        at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:249)
        at io.quarkus.resteasy.runtime.ResteasyFilter.doFilter(ResteasyFilter.java:30)
        at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
        at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
        at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
        at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
        at io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)
        at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
        at io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)
        at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:132)
        at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
        at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
        at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
        at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
        at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
        at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
        at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
        at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
        at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
        at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:269)
        at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:78)
        at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:133)
        at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:130)
        at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
        at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
        at io.quarkus.undertow.runtime.UndertowDeploymentRecorder$9$1$1.call(UndertowDeploymentRecorder.java:513)
        at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:249)
        at io.undertow.servlet.handlers.ServletInitialHandler.handleRequest(ServletInitialHandler.java:174)
        at io.undertow.server.handlers.HttpContinueReadHandler.handleRequest(HttpContinueReadHandler.java:65)
        at io.quarkus.undertow.runtime.UndertowDeploymentRecorder$1.handleRequest(UndertowDeploymentRecorder.java:92)
        at io.undertow.server.handlers.CanonicalPathHandler.handleRequest(CanonicalPathHandler.java:49)
        at io.quarkus.undertow.deployment.devmode.UndertowHotReplacementSetup.handleHotDeploymentRequest(UndertowHotReplacementSetup.java:85)
        at io.quarkus.undertow.deployment.devmode.UndertowHotReplacementSetup$1$1.handleRequest(UndertowHotReplacementSetup.java:61)
        at io.undertow.server.Connectors.executeRootHandler(Connectors.java:376)
        at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:830)
        at io.quarkus.runtime.CleanableExecutor$CleaningRunnable.run(CleanableExecutor.java:224)
        at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
        at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
        at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:2011)
        at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1535)
        at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1395)
        at org.jboss.threads.DelegatingRunnable.run(DelegatingRunnable.java:29)
        at org.jboss.threads.ThreadLocalResettingRunnable.run(ThreadLocalResettingRunnable.java:29)
        at java.base/java.lang.Thread.run(Thread.java:834)
        at org.jboss.threads.JBossThread.run(JBossThread.java:479)
Caused by: java.lang.NullPointerException
        at com.example.CommentResource.saveComment(CommentResource.java:43)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:151)
        at org.jboss.resteasy.core.MethodInjectorImpl.lambda$invoke$3(MethodInjectorImpl.java:122)
        at java.base/java.util.concurrent.CompletableFuture.uniApplyNow(CompletableFuture.java:680)
        at java.base/java.util.concurrent.CompletableFuture.uniApplyStage(CompletableFuture.java:658)
        at java.base/java.util.concurrent.CompletableFuture.thenApply(CompletableFuture.java:2094)
        at java.base/java.util.concurrent.CompletableFuture.thenApply(CompletableFuture.java:143)
        at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:122)
        at org.jboss.resteasy.core.ResourceMethodInvoker.internalInvokeOnTarget(ResourceMethodInvoker.java:594)
        at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTargetAfterFilter(ResourceMethodInvoker.java:468)
        at org.jboss.resteasy.core.ResourceMethodInvoker.lambda$invokeOnTarget$2(ResourceMethodInvoker.java:421)
        at org.jboss.resteasy.core.interception.jaxrs.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:363)
        at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:423)
        at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:391)
        at org.jboss.resteasy.core.ResourceLocatorInvoker.invokeOnTargetObject(ResourceLocatorInvoker.java:158)
        at org.jboss.resteasy.core.ResourceLocatorInvoker.lambda$invoke$3(ResourceLocatorInvoker.java:113)
        at java.base/java.util.concurrent.CompletableFuture.uniComposeStage(CompletableFuture.java:1106)
        at java.base/java.util.concurrent.CompletableFuture.thenCompose(CompletableFuture.java:2235)
        at java.base/java.util.concurrent.CompletableFuture.thenCompose(CompletableFuture.java:143)
        at org.jboss.resteasy.core.ResourceLocatorInvoker.invoke(ResourceLocatorInvoker.java:113)
        at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:477)
        ... 51 more

CommentResource 在 PostResource 中注册.

@Path("posts")
@RequestScoped
public class PostResource{
    //other methods are omitted

    @Path("{id}/comments")
    public CommentResource commentResource() {
        return resourceContext.getResource(CommentResource.class);
    }
}

Commentresource 代码是这样的.

The Commentresource code is like this.

@RequestScoped
public class CommentResource {
    private final static Logger LOGGER = Logger.getLogger(CommentResource.class.getName());
    private final CommentRepository comments;

    @Context
    UriInfo uriInfo;

    @Context
    ResourceContext resourceContext;

    @PathParam("id")
    String postId;

    @Inject
    public CommentResource(CommentRepository commentRepository) {
        this.comments = commentRepository;
    }

    @GET
    public Response getAllComments() {
        return ok(this.comments.allByPostId(this.postId)).build();
    }

    @POST
    public Response saveComment(Comment commentForm) {
        Comment saved = this.comments.save(Comment.of(this.postId, commentForm.getContent()));
        return created(
                uriInfo.getBaseUriBuilder()
                        .path("/posts/{id}/comments/{commentId}")
                        .build(this.postId, saved.getId())
        ).build();
    }
}

似乎CommentResource 中的CommentRepository 不被CDI 和RestEasy Inject 提供程序识别.

It seems the CommentRepository in the CommentResource is not recognized by CDI and RestEasy Inject provider.

推荐答案

现在，我认为您可以通过将 @Unremovable 注释添加到您的 CommentResource 来解决这个问题> 班级.

For now, I think you can work around the issue by adding the @Unremovable annotation to your CommentResource class.

您可能还需要添加 @RegisterForReflection 注释.

You might also have to add the @RegisterForReflection annotation.

我们将看看是否能找到更好的方法来自动检测子资源并为您执行此操作.

We will see if we can find a better way to detect the subresources automatically and do that for you.

这篇关于Quarkus 中的 JAX-RS 子资源问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！