org.apache.flink.runtime.rest.handler.legacy.CurrentJobIdsHandler Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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.legacy;
import org.apache.flink.api.common.time.Time;
import org.apache.flink.runtime.jobmaster.JobManagerGateway;
import org.apache.flink.runtime.messages.webmonitor.JobIdsWithStatusOverview;
import org.apache.flink.runtime.rest.messages.JobIdsWithStatusesOverviewHeaders;
import org.apache.flink.runtime.rest.util.RestMapperUtils;
import org.apache.flink.util.FlinkException;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.core.JsonGenerator;
import java.io.StringWriter;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionException;
import java.util.concurrent.Executor;
import java.util.concurrent.TimeUnit;
import static java.util.Objects.requireNonNull;
/**
* Responder that returns with a list of all JobIDs of jobs found at the target actor.
* May serve the IDs of current jobs, or past jobs, depending on whether this handler is
* given the JobManager or Archive Actor Reference.
*/
public class CurrentJobIdsHandler extends AbstractJsonRequestHandler {
private final Time timeout;
public CurrentJobIdsHandler(Executor executor, Time timeout) {
super(executor);
this.timeout = requireNonNull(timeout);
}
@Override
public String[] getPaths() {
return new String[]{JobIdsWithStatusesOverviewHeaders.CURRENT_JOB_IDS_REST_PATH};
}
@Override
public CompletableFuture handleJsonRequest(
Map pathParams,
Map queryParams,
JobManagerGateway jobManagerGateway) {
return CompletableFuture.supplyAsync(
() -> {
// we need no parameters, get all requests
try {
if (jobManagerGateway != null) {
CompletableFuture overviewFuture = jobManagerGateway.requestJobsOverview(timeout);
JobIdsWithStatusOverview overview = overviewFuture.get(timeout.toMilliseconds(), TimeUnit.MILLISECONDS);
StringWriter writer = new StringWriter();
JsonGenerator gen = JsonFactory.JACKSON_FACTORY.createGenerator(writer);
gen.setCodec(RestMapperUtils.getStrictObjectMapper());
gen.writeStartObject();
gen.writeArrayFieldStart(JobIdsWithStatusOverview.FIELD_NAME_JOBS);
for (JobIdsWithStatusOverview.JobIdWithStatus jobIdWithStatus : overview.getJobsWithStatus()) {
gen.writeObject(jobIdWithStatus);
}
gen.writeEndArray();
gen.writeEndObject();
gen.close();
return writer.toString();
}
else {
throw new Exception("No connection to the leading JobManager.");
}
}
catch (Exception e) {
throw new CompletionException(new FlinkException("Failed to fetch list of all running jobs.", e));
}
},
executor);
}
}