/**
* 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,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.yarn.util;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience.Private;
@Private
public class Times {
private static final Log LOG = LogFactory.getLog(Times.class);
// This format should match the one used in yarn.dt.plugins.js
static final ThreadLocal<SimpleDateFormat> dateFormat =
new ThreadLocal<SimpleDateFormat>() {
@Override protected SimpleDateFormat initialValue() {
return new SimpleDateFormat("EEE MMM dd HH:mm:ss Z yyyy");
}
};
public static long elapsed(long started, long finished) {
return Times.elapsed(started, finished, true);
}
// A valid elapsed is supposed to be non-negative. If finished/current time
// is ahead of the started time, return -1 to indicate invalid elapsed time,
// and record a warning log.
public static long elapsed(long started, long finished, boolean isRunning) {
if (finished > 0 && started > 0) {
long elapsed = finished - started;
if (elapsed >= 0) {
return elapsed;
} else {
LOG.warn("Finished time " + finished
+ " is ahead of started time " + started);
return -1;
}
}
if (isRunning) {
long current = System.currentTimeMillis();
long elapsed = started > 0 ? current - started : 0;
if (elapsed >= 0) {
return elapsed;
} else {
LOG.warn("Current time " + current
+ " is ahead of started time " + started);
return -1;
}
} else {
return -1;
}
}
public static String format(long ts) {
return ts > 0 ? String.valueOf(dateFormat.get().format(new Date(ts)))
: "N/A";
}
}