/
AOStorageService.java
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/
AOStorageService.java
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/*
* 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.lealone.aose.storage;
import java.util.concurrent.Callable;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.TimeUnit;
import org.lealone.aose.concurrent.DebuggableThreadPoolExecutor;
import org.lealone.aose.util.Utils;
public class AOStorageService extends Thread {
private static final CopyOnWriteArrayList<BufferedMap<?, ?>> bufferedMaps = new CopyOnWriteArrayList<>();
private static final CopyOnWriteArrayList<AOMap<?, ?>> aoMaps = new CopyOnWriteArrayList<>();
private static final ExecutorService executorService = new DebuggableThreadPoolExecutor("AOStorageServiceThread", 0,
Utils.getAvailableProcessors(), 6000, TimeUnit.MILLISECONDS);
private static final AOStorageService INSTANCE = new AOStorageService();
static AOStorageService getInstance() {
return INSTANCE;
}
public static void addTask(Callable<?> task) {
executorService.submit(task);
}
public static void addBufferedMap(BufferedMap<?, ?> map) {
bufferedMaps.add(map);
}
public static void removeBufferedMap(BufferedMap<?, ?> map) {
bufferedMaps.remove(map);
}
public static void addAOMap(AOMap<?, ?> map) {
aoMaps.add(map);
}
public static void removeAOMap(AOMap<?, ?> map) {
aoMaps.remove(map);
}
private final int sleepMillis;
private boolean running;
private AOStorageService() {
super("AOStorageService");
this.sleepMillis = 3000;
setDaemon(true);
}
void close() {
running = false;
}
@Override
public synchronized void start() {
if (!running) {
running = true;
super.start();
}
}
@Override
public void run() {
while (running) {
try {
sleep(sleepMillis);
} catch (InterruptedException e) {
continue;
}
adaptiveOptimization();
merge();
}
}
private static void adaptiveOptimization() {
for (AOMap<?, ?> map : aoMaps) {
if (map.getRawMap().isClosed()) {
aoMaps.remove(map);
continue;
}
if (map.getReadPercent() > 50)
map.switchToNoBufferedMap();
else if (map.getWritePercent() > 50)
map.switchToBufferedMap();
}
}
private static void merge() {
for (BufferedMap<?, ?> map : bufferedMaps) {
if (map.getRawMap().isClosed()) {
bufferedMaps.remove(map);
continue;
}
if (map.needMerge())
addTask(map);
}
}
}