/*
 * 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.phoenix.pherf.jmx.monitors;

import java.lang.management.GarbageCollectorMXBean;
import java.lang.management.ManagementFactory;
import java.util.List;
import org.apache.phoenix.pherf.jmx.Stat;

public class GarbageCollectorElapsedTimeMonitor implements Monitor {

  @Override
  public Stat getStat() {
    List<GarbageCollectorMXBean> beans = ManagementFactory.getGarbageCollectorMXBeans();
    long average = 0;
    Stat<Long> stat = null;
    if (beans.size() > 0) {
      for (GarbageCollectorMXBean bean : beans) {
        average += bean.getCollectionTime();
      }
      stat = new Stat(average / beans.size());
    } else {
      stat = new Stat(0);
    }
    return stat;
  }
}
