package org.apache.cassandra.db.hints;
/*
*
* 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.
*
*/
import java.lang.management.ManagementFactory;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Callable;
import java.util.concurrent.Future;
import java.util.concurrent.FutureTask;
import java.util.concurrent.LinkedBlockingQueue;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import org.apache.cassandra.db.commitlog.PeriodicCommitLogExecutorServiceMBean;
import org.apache.cassandra.utils.WrappedRunnable;
public class PeriodicHintLogExecutorService implements PeriodicHintLogExecutorServiceMBean
{
private final BlockingQueue<Runnable> queue;
protected volatile long completedTaskCount = 0;
public PeriodicHintLogExecutorService()
{
this(1024 * Runtime.getRuntime().availableProcessors());
}
public PeriodicHintLogExecutorService(int queueSize)
{
queue = new LinkedBlockingQueue<Runnable>(queueSize);
Runnable runnable = new WrappedRunnable()
{
public void runMayThrow() throws Exception
{
while (true)
{
queue.take().run();
completedTaskCount++;
}
}
};
new Thread(runnable, "HINT-LOG-WRITER").start();
registerMBean(this);
}
protected static void registerMBean(Object o)
{
MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
try
{
mbs.registerMBean(o, new ObjectName("org.apache.cassandra.db:type=Hintlog"));
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
public void add(HintLog.LogRecordAdder adder)
{
try
{
queue.put(adder);
}
catch (InterruptedException e)
{
throw new RuntimeException(e);
}
}
public <T> Future<T> submit(Callable<T> task)
{
FutureTask<T> ft = new FutureTask<T>(task);
try
{
queue.put(ft);
}
catch (InterruptedException e)
{
throw new RuntimeException(e);
}
return ft;
}
public long getPendingTasks()
{
return queue.size();
}
public int getActiveCount()
{
return 1;
}
public long getCompletedTasks()
{
return completedTaskCount;
}
}