// // 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) { s_logger.error("Unable to time", th); } } } }