org.apache.flink.runtime.rest.handler.legacy.AbstractExecutionGraphRequestHandler Maven / Gradle / Ivy
/*
* 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.legacy;
import org.apache.flink.api.common.JobID;
import org.apache.flink.runtime.concurrent.FutureUtils;
import org.apache.flink.runtime.executiongraph.AccessExecutionGraph;
import org.apache.flink.runtime.jobmaster.JobManagerGateway;
import org.apache.flink.runtime.rest.NotFoundException;
import org.apache.flink.util.FlinkException;
import org.apache.flink.util.Preconditions;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionException;
import java.util.concurrent.Executor;
/**
* Base class for request handlers whose response depends on an ExecutionGraph
* that can be retrieved via "jobid" parameter.
*/
public abstract class AbstractExecutionGraphRequestHandler extends AbstractJsonRequestHandler {
private final ExecutionGraphCache executionGraphCache;
public AbstractExecutionGraphRequestHandler(ExecutionGraphCache executionGraphCache, Executor executor) {
super(executor);
this.executionGraphCache = Preconditions.checkNotNull(executionGraphCache);
}
@Override
public CompletableFuture handleJsonRequest(
Map pathParams,
Map queryParams,
JobManagerGateway jobManagerGateway) {
String jidString = pathParams.get("jobid");
if (jidString == null) {
throw new RuntimeException("JobId parameter missing");
}
JobID jid;
try {
jid = JobID.fromHexString(jidString);
}
catch (Exception e) {
return FutureUtils.completedExceptionally(new FlinkException("Invalid JobID string '" + jidString + "'", e));
}
final CompletableFuture graphFuture = executionGraphCache.getExecutionGraph(jid, jobManagerGateway);
return graphFuture
.exceptionally(
throwable -> {
throw new CompletionException(new NotFoundException("Could not find job " + jid + '.'));
})
.thenComposeAsync(
(AccessExecutionGraph executionGraph) -> handleRequest(executionGraph, pathParams), executor);
}
public abstract CompletableFuture handleRequest(AccessExecutionGraph graph, Map params);
}