org.boon.core.SystemTimeKeeper Maven / Gradle / Ivy
/*
* Copyright 2013-2014 Richard M. Hightower
* Licensed 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.
*
* __________ _____ __ .__
* \______ \ ____ ____ ____ /\ / \ _____ | | _|__| ____ ____
* | | _// _ \ / _ \ / \ \/ / \ / \\__ \ | |/ / |/ \ / ___\
* | | ( <_> | <_> ) | \ /\ / Y \/ __ \| <| | | \/ /_/ >
* |______ /\____/ \____/|___| / \/ \____|__ (____ /__|_ \__|___| /\___ /
* \/ \/ \/ \/ \/ \//_____/
* ____. ___________ _____ ______________.___.
* | |____ ___ _______ \_ _____/ / _ \ / _____/\__ | |
* | \__ \\ \/ /\__ \ | __)_ / /_\ \ \_____ \ / | |
* /\__| |/ __ \\ / / __ \_ | \/ | \/ \ \____ |
* \________(____ /\_/ (____ / /_______ /\____|__ /_______ / / ______|
* \/ \/ \/ \/ \/ \/
*/
package org.boon.core;
import org.boon.core.timer.TimeKeeper;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicLong;
/**
* Created by rick on 12/20/13.
*/
public class SystemTimeKeeper implements TimeKeeper {
private static final AtomicLong time = new AtomicLong();
private static final AtomicBoolean started = new AtomicBoolean();
private static ScheduledExecutorService executorService;
@Override
public long time() {
return time.get();
}
public static void start() {
if ( !started.getAndSet (true) ) {
executorService = Executors.newSingleThreadScheduledExecutor();
executorService.scheduleAtFixedRate( new Runnable() {
@Override
public void run() {
time.set( System.nanoTime() / 1_000_000 );
}
}, 5, 5, TimeUnit.MILLISECONDS );
}
Sys.timer.set ( new SystemTimeKeeper () );
}
public static void shutDown() {
executorService.shutdown ();
}
}