org.apache.flink.runtime.rest.handler.legacy.AbstractSubtaskRequestHandler Maven / Gradle / Ivy
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* distributed with this work for additional information
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* 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,
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* 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.runtime.concurrent.FutureUtils;
import org.apache.flink.runtime.executiongraph.AccessExecutionJobVertex;
import org.apache.flink.runtime.executiongraph.AccessExecutionVertex;
import org.apache.flink.util.FlinkException;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.Executor;
/**
* 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(ExecutionGraphCache executionGraphHolder, Executor executor) {
super(executionGraphHolder, executor);
}
@Override
public final CompletableFuture handleRequest(AccessExecutionJobVertex jobVertex, Map params) {
final String subtaskNumberString = params.get("subtasknum");
if (subtaskNumberString == null) {
return FutureUtils.completedExceptionally(new FlinkException("Subtask number parameter missing"));
}
final int subtask;
try {
subtask = Integer.parseInt(subtaskNumberString);
}
catch (NumberFormatException e) {
return FutureUtils.completedExceptionally(new FlinkException("Invalid subtask number parameter", e));
}
if (subtask < 0 || subtask >= jobVertex.getParallelism()) {
return FutureUtils.completedExceptionally(new FlinkException("subtask does not exist: " + subtask));
}
final AccessExecutionVertex vertex = jobVertex.getTaskVertices()[subtask];
return handleRequest(vertex, params);
}
public abstract CompletableFuture handleRequest(AccessExecutionVertex vertex, Map params);
}