org.apache.flink.runtime.rest.handler.legacy.AbstractSubtaskAttemptRequestHandler 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.AccessExecution;
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 execution attempt
* (defined via the "attempt" parameter) of 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 AbstractSubtaskAttemptRequestHandler extends AbstractSubtaskRequestHandler {
public AbstractSubtaskAttemptRequestHandler(ExecutionGraphCache executionGraphHolder, Executor executor) {
super(executionGraphHolder, executor);
}
@Override
public CompletableFuture handleRequest(AccessExecutionVertex vertex, Map params) {
final String attemptNumberString = params.get("attempt");
if (attemptNumberString == null) {
return FutureUtils.completedExceptionally(new FlinkException("Attempt number parameter missing"));
}
final int attempt;
try {
attempt = Integer.parseInt(attemptNumberString);
}
catch (NumberFormatException e) {
return FutureUtils.completedExceptionally(new FlinkException("Invalid attempt number parameter"));
}
final AccessExecution currentAttempt = vertex.getCurrentExecutionAttempt();
if (attempt == currentAttempt.getAttemptNumber()) {
return handleRequest(currentAttempt, params);
}
else if (attempt >= 0 && attempt < currentAttempt.getAttemptNumber()) {
AccessExecution exec = vertex.getPriorExecutionAttempt(attempt);
if (exec != null) {
return handleRequest(exec, params);
} else {
return FutureUtils.completedExceptionally(new RequestHandlerException("Execution for attempt " + attempt +
" has already been deleted."));
}
}
else {
return FutureUtils.completedExceptionally(new FlinkException("Attempt does not exist: " + attempt));
}
}
public abstract CompletableFuture handleRequest(AccessExecution execAttempt, Map params);
}