geode-core/src/main/java/org/apache/geode/distributed/internal/SerialQueuedExecutorWithDMStats.java

/*
 * 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.apache.geode.distributed.internal;

import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

import org.apache.geode.internal.monitoring.ThreadsMonitoring;

/**
 * This class is used for the DM's serial executor. The only thing it currently does is increment
 * stats.
 */
public class SerialQueuedExecutorWithDMStats extends ThreadPoolExecutor {
  final PoolStatHelper stats;
  private final ThreadsMonitoring threadMonitoring;

  public SerialQueuedExecutorWithDMStats(BlockingQueue q, PoolStatHelper stats, ThreadFactory tf,
      ThreadsMonitoring tMonitoring) {
    super(1, 1, 60, TimeUnit.SECONDS, q, tf, new PooledExecutorWithDMStats.BlockHandler());
    // allowCoreThreadTimeOut(true); // deadcoded for 1.5
    this.stats = stats;
    this.threadMonitoring = tMonitoring;
  }

  @Override
  protected void beforeExecute(Thread t, Runnable r) {
    if (this.stats != null) {
      this.stats.startJob();
    }
    if (this.threadMonitoring != null) {
      threadMonitoring.startMonitor(ThreadsMonitoring.Mode.SerialQueuedExecutor);
    }
  }

  @Override
  protected void afterExecute(Runnable r, Throwable ex) {
    if (this.stats != null) {
      this.stats.endJob();
    }
    if (this.threadMonitoring != null) {
      threadMonitoring.endMonitor();
    }
  }
}