org.apache.flink.runtime.rest.handler.job.JobExecutionResultHandler Maven / Gradle / Ivy
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* 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,
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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.job;
import org.apache.flink.api.common.JobID;
import org.apache.flink.api.common.JobStatus;
import org.apache.flink.api.common.time.Time;
import org.apache.flink.runtime.messages.FlinkJobNotFoundException;
import org.apache.flink.runtime.rest.handler.AbstractRestHandler;
import org.apache.flink.runtime.rest.handler.HandlerRequest;
import org.apache.flink.runtime.rest.handler.RestHandlerException;
import org.apache.flink.runtime.rest.messages.EmptyRequestBody;
import org.apache.flink.runtime.rest.messages.JobIDPathParameter;
import org.apache.flink.runtime.rest.messages.JobMessageParameters;
import org.apache.flink.runtime.rest.messages.job.JobExecutionResultHeaders;
import org.apache.flink.runtime.rest.messages.job.JobExecutionResultResponseBody;
import org.apache.flink.runtime.webmonitor.RestfulGateway;
import org.apache.flink.runtime.webmonitor.retriever.GatewayRetriever;
import org.apache.flink.util.ExceptionUtils;
import org.apache.flink.shaded.netty4.io.netty.handler.codec.http.HttpResponseStatus;
import javax.annotation.Nonnull;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionException;
/**
* Returns the {@link org.apache.flink.api.common.JobExecutionResult} for a given {@link JobID}.
*/
public class JobExecutionResultHandler
extends AbstractRestHandler {
public JobExecutionResultHandler(
final GatewayRetriever leaderRetriever,
final Time timeout,
final Map responseHeaders) {
super(
leaderRetriever,
timeout,
responseHeaders,
JobExecutionResultHeaders.getInstance());
}
@Override
protected CompletableFuture handleRequest(
@Nonnull final HandlerRequest request,
@Nonnull final RestfulGateway gateway) throws RestHandlerException {
final JobID jobId = request.getPathParameter(JobIDPathParameter.class);
final CompletableFuture jobStatusFuture = gateway.requestJobStatus(jobId, timeout);
return jobStatusFuture.thenCompose(
jobStatus -> {
if (jobStatus.isGloballyTerminalState()) {
return gateway
.requestJobResult(jobId, timeout)
.thenApply(JobExecutionResultResponseBody::created);
} else {
return CompletableFuture.completedFuture(
JobExecutionResultResponseBody.inProgress());
}
}).exceptionally(throwable -> {
throw propagateException(throwable);
});
}
private static CompletionException propagateException(final Throwable throwable) {
final Throwable cause = ExceptionUtils.stripCompletionException(throwable);
if (cause instanceof FlinkJobNotFoundException) {
throw new CompletionException(new RestHandlerException(
throwable.getMessage(),
HttpResponseStatus.NOT_FOUND,
throwable));
} else {
throw new CompletionException(throwable);
}
}
}