org.apache.flink.runtime.executiongraph.metrics.UpTimeGauge 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
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*/
package org.apache.flink.runtime.executiongraph.metrics;
import org.apache.flink.metrics.Gauge;
import org.apache.flink.runtime.executiongraph.ExecutionGraph;
import org.apache.flink.runtime.jobgraph.JobStatus;
import static org.apache.flink.util.Preconditions.checkNotNull;
/**
* A gauge that returns (in milliseconds) how long a job has been running.
*
* For jobs that are not running any more, it returns {@value NO_LONGER_RUNNING}.
*/
public class UpTimeGauge implements Gauge {
public static final String METRIC_NAME = "uptime";
private static final long NO_LONGER_RUNNING = -1L;
// ------------------------------------------------------------------------
private final ExecutionGraph eg;
public UpTimeGauge(ExecutionGraph executionGraph) {
this.eg = checkNotNull(executionGraph);
}
// ------------------------------------------------------------------------
@Override
public Long getValue() {
final JobStatus status = eg.getState();
if (status == JobStatus.RUNNING) {
// running right now - report the uptime
final long runningTimestamp = eg.getStatusTimestamp(JobStatus.RUNNING);
// we use 'Math.max' here to avoid negative timestamps when clocks change
return Math.max(System.currentTimeMillis() - runningTimestamp, 0);
}
else if (status.isTerminalState()) {
// not running any more -> finished or not on leader
return NO_LONGER_RUNNING;
}
else {
// not yet running or not up at the moment
return 0L;
}
}
}