/**
    * 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.hadoop.hbase.regionserver;
  
  /**
   * This is the interface that will expose RegionServer information to hadoop1/hadoop2
   * implementations of the MetricsRegionServerSource.
   */
  public interface MetricsRegionServerWrapper {
  
    /**
     * Get ServerName
     */
    String getServerName();
  
    /**
     * Get the Cluster ID
     *
     * @return Cluster ID
     */
    String getClusterId();
  
    /**
     * Get the Zookeeper Quorum Info
     *
     * @return Zookeeper Quorum Info
     */
    String getZookeeperQuorum();
  
    /**
     * Get the co-processors
     *
     * @return Co-processors
     */
    String getCoprocessors();
  
    /**
     * Get HRegionServer start time
     *
     * @return Start time of RegionServer in milliseconds
     */
    long getStartCode();
  
    /**
     * The number of online regions
     */
    long getNumOnlineRegions();
  
    /**
     * Get the number of stores hosted on this region server.
     */
    long getNumStores();
  
    /**
     * Get the number of WAL files of this region server.
     */
    public long getNumWALFiles();
    
    /**
     * Get the size of WAL files of this region server.
     */
    public long getWALFileSize();
    
    /**
     * Get the number of store files hosted on this region server.
     */
    long getNumStoreFiles();
  
    /**
     * Get the size of the memstore on this region server.
     */
    long getMemstoreSize();
  
    /**
     * Get the total size of the store files this region server is serving from.
     */
    long getStoreFileSize();
  
    /**
     * Get the number of requests per second.
     */
    double getRequestsPerSecond();
  
   /**
    * Get the total number of requests per second.
    */
   long getTotalRequestCount();
 
   /**
    * Get the number of read requests to regions hosted on this region server.
    */
   long getReadRequestsCount();
 
   /**
    * Get the number of write requests to regions hosted on this region server.
    */
   long getWriteRequestsCount();
 
   /**
    * Get the number of CAS operations that failed.
    */
   long getCheckAndMutateChecksFailed();
 
   /**
    * Get the number of CAS operations that passed.
    */
   long getCheckAndMutateChecksPassed();
 
   /**
    * Get the Size (in bytes) of indexes in storefiles on disk.
    */
   long getStoreFileIndexSize();
 
   /**
    * Get the size (in bytes) of of the static indexes including the roots.
    */
   long getTotalStaticIndexSize();
 
   /**
    * Get the size (in bytes) of the static bloom filters.
    */
   long getTotalStaticBloomSize();
 
   /**
    * Number of mutations received with WAL explicitly turned off.
    */
   long getNumMutationsWithoutWAL();
 
   /**
    * Ammount of data in the memstore but not in the WAL because mutations explicitly had their
    * WAL turned off.
    */
   long getDataInMemoryWithoutWAL();
 
   /**
    * Get the percent of HFiles' that are local.
    */
   int getPercentFileLocal();
 
   /**
    * Get the percent of HFiles' that are local for secondary region replicas.
    */
   int getPercentFileLocalSecondaryRegions();
 
   /**
    * Get the size of the split queue
    */
   int getSplitQueueSize();
 
   /**
    * Get the size of the compaction queue
    */
   int getCompactionQueueSize();
 
   int getSmallCompactionQueueSize();
 
   int getLargeCompactionQueueSize();
 
   /**
    * Get the size of the flush queue.
    */
   int getFlushQueueSize();
 
   /**
    * Get the size (in bytes) of the block cache that is free.
    */
   long getBlockCacheFreeSize();
 
   /**
    * Get the number of items in the block cache.
    */
   long getBlockCacheCount();
 
   /**
    * Get the total size (in bytes) of the block cache.
    */
   long getBlockCacheSize();
 
   /**
    * Get the count of hits to the block cache
    */
   long getBlockCacheHitCount();
 
   /**
    * Get the count of misses to the block cache.
    */
   long getBlockCacheMissCount();
 
   /**
    * Get the number of items evicted from the block cache.
    */
   long getBlockCacheEvictedCount();
 
   /**
    * Get the percent of all requests that hit the block cache.
    */
   double getBlockCacheHitPercent();
 
   /**
    * Get the percent of requests with the block cache turned on that hit the block cache.
    */
   int getBlockCacheHitCachingPercent();
 
   /**
    * Force a re-computation of the metrics.
    */
   void forceRecompute();
 
   /**
    * Get the amount of time that updates were blocked.
    */
   long getUpdatesBlockedTime();
 
   /**
    * Get the number of cells flushed to disk.
    */
   long getFlushedCellsCount();
 
   /**
    * Get the number of cells processed during minor compactions.
    */
   long getCompactedCellsCount();
 
   /**
    * Get the number of cells processed during major compactions.
    */
   long getMajorCompactedCellsCount();
 
   /**
    * Get the total amount of data flushed to disk, in bytes.
    */
   long getFlushedCellsSize();
 
   /**
    * Get the total amount of data processed during minor compactions, in bytes.
    */
   long getCompactedCellsSize();
 
   /**
    * Get the total amount of data processed during major compactions, in bytes.
    */
   long getMajorCompactedCellsSize();
 
   /**
    * @return Count of requests blocked because the memstore size is larger than blockingMemStoreSize
    */
   public long getBlockedRequestsCount();
 }