src/java/org/apache/cassandra/db/commitlog/AbstractCommitLogExecutorService.java

package org.apache.cassandra.db.commitlog;
/*
 * 
 * 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.List;
import java.util.concurrent.AbstractExecutorService;
import java.util.concurrent.TimeUnit;
import javax.management.MBeanServer;
import javax.management.ObjectName;

public abstract class AbstractCommitLogExecutorService extends AbstractExecutorService implements ICommitLogExecutorService
{
    protected volatile long completedTaskCount = 0;

    protected static void registerMBean(Object o)
    {
        MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
        try
        {
            mbs.registerMBean(o, new ObjectName("org.apache.cassandra.db:type=Commitlog"));
        }
        catch (Exception e)
        {
            throw new RuntimeException(e);
        }
    }

    /**
     * Get the current number of running tasks
     */
    public int getActiveCount()
    {
        return 1;
    }

    /**
     * Get the number of completed tasks
     */
    public long getCompletedTasks()
    {
        return completedTaskCount;
    }

    // cassandra is crash-only so there's no need to implement the shutdown methods

    public boolean isShutdown()
    {
        return false;
    }

    public boolean isTerminated()
    {
        return false;
    }

    public void shutdown()
    {
        throw new UnsupportedOperationException();
    }

    public List<Runnable> shutdownNow()
    {
        throw new UnsupportedOperationException();
    }

    public boolean awaitTermination(long timeout, TimeUnit unit) throws InterruptedException
    {
        throw new UnsupportedOperationException();
    }
}