/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.flink.runtime.webmonitor; import org.apache.flink.api.common.time.Time; import org.apache.flink.configuration.Configuration; import org.apache.flink.runtime.concurrent.FutureUtils; import org.apache.flink.runtime.rest.handler.LeaderRetrievalHandler; import org.apache.flink.runtime.rest.handler.router.RoutedRequest; import org.apache.flink.runtime.rest.handler.router.Router; import org.apache.flink.runtime.rest.handler.util.HandlerRedirectUtils; import org.apache.flink.runtime.rest.handler.util.KeepAliveWrite; import org.apache.flink.runtime.webmonitor.retriever.GatewayRetriever; import org.apache.flink.runtime.webmonitor.testutils.HttpTestClient; import org.apache.flink.runtime.webmonitor.utils.WebFrontendBootstrap; import org.apache.flink.util.TestLogger; import org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandlerContext; import org.apache.flink.shaded.netty4.io.netty.handler.codec.http.HttpResponse; import org.apache.flink.shaded.netty4.io.netty.handler.codec.http.HttpResponseStatus; import org.junit.Assert; import org.junit.Test; import javax.annotation.Nonnull; import java.util.Collections; import java.util.concurrent.CompletableFuture; /** * Tests for the {@link LeaderRetrievalHandler}. */ public class LeaderRetrievalHandlerTest extends TestLogger { private static final String RESPONSE_MESSAGE = "foobar"; /** * Tests the behaviour of the LeaderRetrievalHandler under the following conditions. * * <p>1. No gateway resolved --> service unavailable * 2. leader gateway * @throws Exception */ @Test public void testLeaderRetrievalGateway() throws Exception { final String restPath = "/testing"; final Configuration configuration = new Configuration(); final Router router = new Router(); final Time timeout = Time.seconds(10L); final CompletableFuture<RestfulGateway> gatewayFuture = new CompletableFuture<>(); final GatewayRetriever<RestfulGateway> gatewayRetriever = () -> gatewayFuture; final RestfulGateway gateway = TestingRestfulGateway.newBuilder().build(); final TestingHandler testingHandler = new TestingHandler( gatewayRetriever, timeout); router.addGet(restPath, testingHandler); WebFrontendBootstrap bootstrap = new WebFrontendBootstrap( router, log, null, null, "localhost", 0, configuration); try (HttpTestClient httpClient = new HttpTestClient("localhost", bootstrap.getServerPort())) { // 1. no leader gateway available --> Service unavailable httpClient.sendGetRequest(restPath, FutureUtils.toFiniteDuration(timeout)); HttpTestClient.SimpleHttpResponse response = httpClient.getNextResponse(FutureUtils.toFiniteDuration(timeout)); Assert.assertEquals(HttpResponseStatus.SERVICE_UNAVAILABLE, response.getStatus()); // 2. with leader gatewayFuture.complete(gateway); httpClient.sendGetRequest(restPath, FutureUtils.toFiniteDuration(timeout)); response = httpClient.getNextResponse(FutureUtils.toFiniteDuration(timeout)); Assert.assertEquals(HttpResponseStatus.OK, response.getStatus()); Assert.assertEquals(RESPONSE_MESSAGE, response.getContent()); } finally { bootstrap.shutdown(); } } private static class TestingHandler extends LeaderRetrievalHandler<RestfulGateway> { protected TestingHandler( @Nonnull GatewayRetriever<RestfulGateway> leaderRetriever, @Nonnull Time timeout) { super(leaderRetriever, timeout, Collections.emptyMap()); } @Override protected void respondAsLeader(ChannelHandlerContext channelHandlerContext, RoutedRequest routedRequest, RestfulGateway gateway) throws Exception { Assert.assertTrue(channelHandlerContext.channel().eventLoop().inEventLoop()); HttpResponse response = HandlerRedirectUtils.getResponse(HttpResponseStatus.OK, RESPONSE_MESSAGE); KeepAliveWrite.flush(channelHandlerContext.channel(), routedRequest.getRequest(), response); } } }