/* * 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.rest.handler.cluster; import org.apache.flink.api.common.time.Time; import org.apache.flink.runtime.rest.handler.AbstractHandler; import org.apache.flink.runtime.rest.handler.HandlerRequest; import org.apache.flink.runtime.rest.handler.util.HandlerUtils; import org.apache.flink.runtime.rest.messages.EmptyRequestBody; import org.apache.flink.runtime.rest.messages.ErrorResponseBody; import org.apache.flink.runtime.rest.messages.MessageParameters; import org.apache.flink.runtime.rest.messages.UntypedResponseMessageHeaders; import org.apache.flink.runtime.webmonitor.RestfulGateway; import org.apache.flink.runtime.webmonitor.retriever.GatewayRetriever; import org.apache.flink.util.FlinkException; import org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandlerContext; import org.apache.flink.shaded.netty4.io.netty.handler.codec.http.HttpRequest; import org.apache.flink.shaded.netty4.io.netty.handler.codec.http.HttpResponseStatus; import javax.annotation.Nullable; import java.io.File; import java.util.Collections; import java.util.Map; import java.util.concurrent.CompletableFuture; import java.util.concurrent.CompletionException; /** * Base class for serving files from the JobManager. */ public abstract class AbstractJobManagerFileHandler<M extends MessageParameters> extends AbstractHandler<RestfulGateway, EmptyRequestBody, M> { protected AbstractJobManagerFileHandler( GatewayRetriever<? extends RestfulGateway> leaderRetriever, Time timeout, Map<String, String> responseHeaders, UntypedResponseMessageHeaders<EmptyRequestBody, M> messageHeaders) { super(leaderRetriever, timeout, responseHeaders, messageHeaders); } @Override protected CompletableFuture<Void> respondToRequest(ChannelHandlerContext ctx, HttpRequest httpRequest, HandlerRequest<EmptyRequestBody, M> handlerRequest, RestfulGateway gateway) { File file = getFile(handlerRequest); if (file != null && file.exists()) { try { HandlerUtils.transferFile( ctx, file, httpRequest); } catch (FlinkException e) { throw new CompletionException(new FlinkException("Could not transfer file to client.", e)); } return CompletableFuture.completedFuture(null); } else { return HandlerUtils.sendErrorResponse( ctx, httpRequest, new ErrorResponseBody("This file does not exist in JobManager log dir."), HttpResponseStatus.NOT_FOUND, Collections.emptyMap()); } } @Nullable protected abstract File getFile(HandlerRequest<EmptyRequestBody, M> handlerRequest); }