scouter.io.FlushCtr Maven / Gradle / Ivy
/*
* Copyright 2015 the original author or authors.
* @https://github.com/scouter-project/scouter
*
* 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.
*/
package scouter.io;
import java.util.Enumeration;
import scouter.util.IntKeyMap;
import scouter.util.ThreadUtil;
public class FlushCtr extends Thread {
private static class FlushItem {
long lastFlushTime = System.currentTimeMillis();;
IFlushable object;
public FlushItem(IFlushable object) {
this.object = object;
}
}
private static FlushCtr instance = null;
public final static synchronized FlushCtr getInstance() {
if (instance == null) {
instance = new FlushCtr();
instance.setDaemon(true);
instance.setName(ThreadUtil.getName(instance));
instance.start();
}
return instance;
}
protected FlushCtr() {
}
public void shutdown() {
running = false;
}
private IntKeyMap table = new IntKeyMap();
private boolean running = true;
public void run() {
while (running) {
try {
process();
} catch (Throwable t) {
t.printStackTrace();
}
ThreadUtil.sleep(1000);
}
}
public void regist(IFlushable object) {
table.put(System.identityHashCode(object), new FlushItem(object));
}
public void unregist(IFlushable object) {
table.remove(System.identityHashCode(object));
if (object.isDirty()) {
object.flush();
}
}
private void process() {
Enumeration en = table.values();
while (en.hasMoreElements()) {
FlushItem f = en.nextElement();
long now = System.currentTimeMillis();
if (f.object.isDirty() && now >= f.lastFlushTime + f.object.interval()) {
f.lastFlushTime = now;
f.object.flush();
}
}
}
}