Quarkus："org.jboss.resteasy.reactive.server.mapping.RuntimeResource.getProduces()" 的 return 值为空

Question

我使用 this official guide 在 Quarkus 上创建了 Reactive SQL 客户端，但是在 http://localhost:8080/hello 上发出 GET 请求试图从数据库中查询数据时，我收到这样的错误:

2022-03-06 13:18:53,051 ERROR [io.qua.ver.htt.run.QuarkusErrorHandler] (vert.x-eventloop-thread-5) HTTP Request to /hello failed, error id: 2796a874-61d9-43ee-bd87-6f098cffa484-2: java.lang.NullPointerException: Cannot invoke "org.jboss.resteasy.reactive.common.util.ServerMediaType.getSortedMediaTypes()" because the return value of "org.jboss.resteasy.reactive.server.mapping.RuntimeResource.getProduces()" is null
    at org.jboss.resteasy.reactive.server.handlers.PublisherResponseHandler.handle(PublisherResponseHandler.java:203)
    at org.jboss.resteasy.reactive.server.handlers.PublisherResponseHandler.handle(PublisherResponseHandler.java:30)
    at org.jboss.resteasy.reactive.common.core.AbstractResteasyReactiveContext.run(AbstractResteasyReactiveContext.java:141)
    at org.jboss.resteasy.reactive.server.handlers.RestInitialHandler.beginProcessing(RestInitialHandler.java:49)
    at org.jboss.resteasy.reactive.server.vertx.ResteasyReactiveVertxHandler.handle(ResteasyReactiveVertxHandler.java:17)
    at org.jboss.resteasy.reactive.server.vertx.ResteasyReactiveVertxHandler.handle(ResteasyReactiveVertxHandler.java:7)
    at io.vertx.ext.web.impl.RouteState.handleContext(RouteState.java:1212)
    at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:163)
    at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:141)
    at io.quarkus.vertx.http.runtime.StaticResourcesRecorder.handle(StaticResourcesRecorder.java:67)
    at io.quarkus.vertx.http.runtime.StaticResourcesRecorder.handle(StaticResourcesRecorder.java:55)
    at io.vertx.ext.web.impl.RouteState.handleContext(RouteState.java:1212)
    at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:126)
    at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:141)
    at io.vertx.ext.web.handler.impl.StaticHandlerImpl.lambda$sendStatic(StaticHandlerImpl.java:274)
    at io.vertx.core.impl.future.FutureImpl.onSuccess(FutureImpl.java:141)
    at io.vertx.core.impl.future.FutureBase.lambda$emitSuccess[=12=](FutureBase.java:54)
    at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164)
    at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:469)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:503)
    at io.netty.util.concurrent.SingleThreadEventExecutor.run(SingleThreadEventExecutor.java:986)
    at io.netty.util.internal.ThreadExecutorMap.run(ThreadExecutorMap.java:74)
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
    at java.base/java.lang.Thread.run(Thread.java:833)

Answer 1

您需要添加如下内容：

@Produces(MediaType.APPLICATION_JSON)
// Each element will be sent as JSON
@RestSseElementType(MediaType.APPLICATION_JSON)

你的 JAX-RS 方法。

但是，您很可能还需要包括 quarkus-resteasy-reactive-jackson。此外，您可能想重新使用 Multi 作为 return 类型，因为您可能正在寻找类似 Uni<List<Address>>.

的东西

Quarkus："org.jboss.resteasy.reactive.server.mapping.RuntimeResource.getProduces()" 的 return 值为空

Quarkus: The return value of "org.jboss.resteasy.reactive.server.mapping.RuntimeResource.getProduces()" is null

java

resteasy

vert.x

reactive

quarkus