在Kotlin IllegalStateException消息==null中使用RxJava2改装Vertx

我正在使用Vertx和RxJava2（RxKotlin）在Kotlin中构建一个非常简单的应用程序，使用Kovert REST框架和改进。我有改装vertx适配器和RxJava2改装适配器。我可以从我的

listUndergroundStations（）

方法返回任意列表，但每当我尝试从远程API加载时，我都会遇到以下错误：

Jun 23, 2017 2:16:29 PM uk.amb85.rxweb.api.UndergroundRestController
SEVERE: HTTP CODE 500 - /api/underground/stations - java.io.IOException: java.lang.IllegalStateException: message == null
java.lang.RuntimeException: java.io.IOException: java.lang.IllegalStateException: message == null
    at io.reactivex.internal.util.ExceptionHelper.wrapOrThrow(ExceptionHelper.java:45)
    at io.reactivex.internal.observers.BlockingMultiObserver.blockingGet(BlockingMultiObserver.java:91)
    at io.reactivex.Single.blockingGet(Single.java:2148)
    at uk.amb85.rxweb.api.UndergroundRestController$listUndergroundStations$1.invoke(UndergroundRestController.kt:35)
    at uk.amb85.rxweb.api.UndergroundRestController$listUndergroundStations$1.invoke(UndergroundRestController.kt:13)
    at nl.komponents.kovenant.TaskPromise$wrapper$1.invoke(promises-jvm.kt:138)
    at nl.komponents.kovenant.TaskPromise$wrapper$1.invoke(promises-jvm.kt:130)
    at nl.komponents.kovenant.NonBlockingDispatcher$ThreadContext.run(dispatcher-jvm.kt:327)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.IOException: java.lang.IllegalStateException: message == null
    at com.julienviet.retrofit.vertx.VertxCallFactory$VertxCall.lambda$enqueue$0(VertxCallFactory.java:90)
    at io.vertx.core.impl.FutureImpl.tryFail(FutureImpl.java:170)
    at io.vertx.core.http.impl.HttpClientResponseImpl.handleException(HttpClientResponseImpl.java:270)
    at io.vertx.core.http.impl.HttpClientResponseImpl.handleEnd(HttpClientResponseImpl.java:259)
    at io.vertx.core.http.impl.ClientConnection.handleResponseEnd(ClientConnection.java:361)
    at io.vertx.core.http.impl.ClientHandler.doMessageReceived(ClientHandler.java:80)
    at io.vertx.core.http.impl.ClientHandler.doMessageReceived(ClientHandler.java:38)
    at io.vertx.core.http.impl.VertxHttpHandler.lambda$channelRead$0(VertxHttpHandler.java:71)
    at io.vertx.core.impl.ContextImpl.lambda$wrapTask$2(ContextImpl.java:335)
    at io.vertx.core.impl.ContextImpl.executeFromIO(ContextImpl.java:193)
    at io.vertx.core.http.impl.VertxHttpHandler.channelRead(VertxHttpHandler.java:71)
    at io.vertx.core.net.impl.VertxHandler.channelRead(VertxHandler.java:122)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:341)
    at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:435)
    at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:293)
    at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:267)
    at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:250)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:341)
    at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1228)
    at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1039)
    at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:411)
    at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:248)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:341)
    at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349)
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926)
    at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:129)
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:642)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:565)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:479)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:441)
    at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858)
    ... 1 more
Caused by: java.lang.IllegalStateException: message == null
    at okhttp3.Response$Builder.build(Response.java:431)
    at com.julienviet.retrofit.vertx.VertxCallFactory$VertxCall.lambda$null$1(VertxCallFactory.java:109)
    at io.vertx.core.http.impl.HttpClientResponseImpl$BodyHandler.notifyHandler(HttpClientResponseImpl.java:301)
    at io.vertx.core.http.impl.HttpClientResponseImpl.lambda$bodyHandler$0(HttpClientResponseImpl.java:193)
    at io.vertx.core.http.impl.HttpClientResponseImpl.handleEnd(HttpClientResponseImpl.java:257)
    ... 36 more

我一辈子都搞不清楚是什么导致了非法状态异常，于是用谷歌搜索了它。我不认为它与Rx有关，因为如果我使方法返回

可见

，或者甚至完全取消Rx并返回

调用

（相应地调整控制器），我会得到相同的错误。然而，除此之外，我的头撞到了墙上！有人能指出我的错误吗（除了在我头下垫个垫子）

主要垂直线：

class ApiVerticle : AbstractVerticle() {

    override fun start(startFuture: Future<Void>?) {
        // Initialise injection.
        configureKodein()

        val apiRouter = configureRouter(vertx)

        vertx.createHttpServer()
                .requestHandler { apiRouter.accept(it) }
                .listen(8080)
    }

    private fun configureKodein() {
        Kodein.global.addImport(Kodein.Module {
            import(TflUndergroundService.module)
        })
    }

    private fun configureRouter(vertx: Vertx): Router {
        val apiMountPoint = "api"
        val routerInit = fun Router.() {
            bindController(UndergroundRestController(), apiMountPoint)
        }
        val router = Router.router(vertx) initializedBy { router ->
            router.routerInit()
        }
        return router
    }
}

有问题的REST控制器（在Kovert中，

Promise

在Vertx工作线程上执行）：

---

您正在使用的

改装vertx

存在问题

OkHttp3

的

ResponseBuilder

要求

message

不为空，但

VertxCallFactory

不设置它

它在最新版本中已修复，但由于它仍在开发中，您必须使用快照：

repositories {
    mavenCentral()
    maven {
        url "https://oss.sonatype.org/content/repositories/snapshots"
    }
}

dependencies {

    compile 'com.julienviet:retrofit-vertx:1.0.2-SNAPSHOT'

}

切换到快照依赖项修复了您在问题中提到的问题，但json映射存在一个问题，可以通过切换以下代码轻松解决：

@GET("/Line/Mode/tube")
fun getAllUndergroundLines(): Observable<UndergroundLine>

对于数据类

---

但这是另一个问题，涉及到如何解析来自API的响应，您正在使用该API来

可观察
，如果找不到解决方法，应该询问您。
您可以添加您的主类吗？
ApiVerticle
在Gradle中配置为主类。那么您可以将该部分配置添加到问题中吗？@ledniov那是加上去的，谢谢。当我尝试不使用改装vertx时，我注意到需要返回一个可观察的
。我将尝试一下快照，看看我的发展方向。1.0.2版修复了这个错误并更新到Vert.x 3.4.2，现在发布了
class UndergroundRestController(val undergroundService: TflService = Kodein.global.instance()) {
    fun ApiKeySecured.listUndergroundStations(): Promise<List<UndergroundLine>, Exception> {
        //TODO: This is blocking, fix it!??
        return task {
            undergroundService
                    .getAllUndergroundLines()
                    .doOnError { println(it) }
                    .toList()
                    .blockingGet()
        }
    }
}

mainClassName = "io.vertx.core.Launcher"
def mainVerticleName = "uk.amb85.rxweb.verticles.ApiVerticle"
def configurationFile = "conf/development.json"

run {
    args = ["run",
            mainVerticleName,
            "--launcher-class=$mainClassName",
            "-conf $configurationFile"
    ]
}

repositories {
    mavenCentral()
    maven {
        url "https://oss.sonatype.org/content/repositories/snapshots"
    }
}

dependencies {

    compile 'com.julienviet:retrofit-vertx:1.0.2-SNAPSHOT'

}

@GET("/Line/Mode/tube")
fun getAllUndergroundLines(): Observable<UndergroundLine>

@GET("/Line/Mode/tube")
fun getAllUndergroundLines(): Observable<List<UndergroundLine>>

data class UndergroundLine(var id: String = "", var name: String = "")