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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 com.gemstone.gemfire.internal;

import java.util.List;

import com.gemstone.gemfire.Statistics;
import com.gemstone.gemfire.StatisticsFactory;

/**
 * Defines the contract that a statistics factory must implement
 * for its Statistics instances. This is an internal implementation
 * specific interface.
 *
 * @author Darrel Schneider
 *
 */
public interface StatisticsManager extends StatisticsFactory {
  /**
   * Called when the Statistics instance s is closed.
   */
  public void destroyStatistics(Statistics s);
  /**
   * Returns a name that can be used to identify the manager
   */
  public String getName();
  /**
   * Returns a numeric id that can be used to identify the manager
   */
  public long getId();
  /**
   * Returns the start time of this manager.
   */
  public long getStartTime();
  /**
   * Returns a value that changes any time a Statistics instance is added
   * or removed from this manager.
   */
  public int getStatListModCount();
  /**
   * Returns a list of all the Statistics this manager is currently managing.
   */
  public List getStatsList();
  
  /**
   * Returns the current number of statistics instances.
   */
  public int getStatisticsCount();

  /**
   * Returns the statistics resource instance given its id.
   */
  public Statistics findStatistics(long id);

  /**
   * Returns true if the specified statistic resource still exists.
   */
  public boolean statisticsExists(long id);

  /**
   * Returns an array of all the current statistic resource instances.
   */
  public Statistics[] getStatistics();
}