/*
* 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.handlers;
import org.apache.flink.runtime.executiongraph.AccessExecutionJobVertex;
import org.apache.flink.runtime.executiongraph.AccessExecutionVertex;
import org.apache.flink.runtime.webmonitor.ExecutionGraphHolder;
import java.util.Map;
/**
* Base class for request handlers whose response depends on a specific subtask (defined via the
* "subtasknum" parameter) in a specific job vertex (defined via the "vertexid" parameter) in a
* specific job, defined via (defined voa the "jobid" parameter).
*/
public abstract class AbstractSubtaskRequestHandler extends AbstractJobVertexRequestHandler {
public AbstractSubtaskRequestHandler(ExecutionGraphHolder executionGraphHolder) {
super(executionGraphHolder);
}
@Override
public final String handleRequest(AccessExecutionJobVertex jobVertex, Map<String, String> params) throws Exception {
final String subtaskNumberString = params.get("subtasknum");
if (subtaskNumberString == null) {
throw new RuntimeException("Subtask number parameter missing");
}
final int subtask;
try {
subtask = Integer.parseInt(subtaskNumberString);
}
catch (NumberFormatException e) {
throw new RuntimeException("Invalid subtask number parameter");
}
if (subtask < 0 || subtask >= jobVertex.getParallelism()) {
throw new RuntimeException("subtask does not exist: " + subtask);
}
final AccessExecutionVertex vertex = jobVertex.getTaskVertices()[subtask];
return handleRequest(vertex, params);
}
public abstract String handleRequest(AccessExecutionVertex vertex, Map<String, String> params) throws Exception;
}