//
// 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 com.cloud.utils.time;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import javax.management.StandardMBean;
import org.apache.log4j.Logger;
import com.cloud.utils.concurrency.NamedThreadFactory;
import com.cloud.utils.mgmt.JmxUtil;
/**
*/
public class InaccurateClock extends StandardMBean implements InaccurateClockMBean {
private static final Logger s_logger = Logger.getLogger(InaccurateClock.class);
static ScheduledExecutorService s_executor = null;
static final InaccurateClock s_timer = new InaccurateClock();
private static long time;
public InaccurateClock() {
super(InaccurateClockMBean.class, false);
time = System.currentTimeMillis();
restart();
try {
JmxUtil.registerMBean("InaccurateClock", "InaccurateClock", this);
} catch (Exception e) {
s_logger.warn("Unable to initialize inaccurate clock", e);
}
}
@Override
public long[] getCurrentTimes() {
long[] results = new long[2];
results[0] = time;
results[1] = System.currentTimeMillis();
return results;
}
@Override
public synchronized String restart() {
turnOff();
s_executor = Executors.newScheduledThreadPool(1, new NamedThreadFactory("InaccurateClock"));
s_executor.scheduleAtFixedRate(new SetTimeTask(), 0, 60, TimeUnit.SECONDS);
return "Restarted";
}
@Override
public String turnOff() {
if (s_executor != null) {
try {
s_executor.shutdown();
} catch (Throwable th) {
s_logger.error("Unable to shutdown the Executor", th);
return "Unable to turn off check logs";
}
}
s_executor = null;
return "Off";
}
public static long getTime() {
return s_executor != null ? time : System.currentTimeMillis();
}
public static long getTimeInSeconds() {
return time / 1000;
}
protected class SetTimeTask implements Runnable {
@Override
public void run() {
try {
time = System.currentTimeMillis();
} catch (Throwable th) {
try {
s_logger.error("Unable to time", th);
} catch (Throwable th2) {
}
}
}
}
}