/**
    * 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;
  
  import org.apache.hadoop.hbase.metrics.BaseSource;
  
  /**
   * Interface for classes that expose metrics about the regionserver.
   */
  public interface MetricsRegionServerSource extends BaseSource {
  
    /**
     * The name of the metrics
     */
    String METRICS_NAME = "Server";
  
    /**
     * The name of the metrics context that metrics will be under.
     */
    String METRICS_CONTEXT = "regionserver";
  
    /**
     * Description
     */
    String METRICS_DESCRIPTION = "Metrics about HBase RegionServer";
  
    /**
     * The name of the metrics context that metrics will be under in jmx
     */
    String METRICS_JMX_CONTEXT = "RegionServer,sub=" + METRICS_NAME;
  
    /**
     * Update the Put time histogram
     *
     * @param t time it took
     */
    void updatePut(long t);
  
    /**
     * Update the Delete time histogram
     *
     * @param t time it took
     */
    void updateDelete(long t);
  
    /**
     * Update the Get time histogram .
     *
     * @param t time it took
     */
    void updateGet(long t);
  
    /**
     * Update the Increment time histogram.
     *
     * @param t time it took
     */
    void updateIncrement(long t);
  
    /**
     * Update the Append time histogram.
     *
     * @param t time it took
     */
    void updateAppend(long t);
  
    /**
     * Update the Replay time histogram.
     *
     * @param t time it took
     */
    void updateReplay(long t);
  
    /**
     * Update the scan size.
     *
     * @param scanSize size of the scan
     */
    void updateScannerNext(long scanSize);
  
    /**
     * Increment the number of slow Puts that have happened.
     */
   void incrSlowPut();
 
   /**
    * Increment the number of slow Deletes that have happened.
    */
   void incrSlowDelete();
 
   /**
    * Increment the number of slow Gets that have happened.
    */
   void incrSlowGet();
 
   /**
    * Increment the number of slow Increments that have happened.
    */
   void incrSlowIncrement();
 
   /**
    * Increment the number of slow Appends that have happened.
    */
   void incrSlowAppend();
 
   /**
    * Update the split transaction time histogram
    * @param t time it took, in milliseconds
    */
   void updateSplitTime(long t);
 
   /**
    * Increment number of a requested splits
    */
   void incrSplitRequest();
 
   /**
    * Increment number of successful splits
    */
   void incrSplitSuccess();
 
   /**
    * Update the flush time histogram
    * @param t time it took, in milliseconds
    */
   void updateFlushTime(long t);
 
   // Strings used for exporting to metrics system.
   String REGION_COUNT = "regionCount";
   String REGION_COUNT_DESC = "Number of regions";
   String STORE_COUNT = "storeCount";
   String STORE_COUNT_DESC = "Number of Stores";
   String WALFILE_COUNT = "hlogFileCount";
   String WALFILE_COUNT_DESC = "Number of WAL Files";
   String WALFILE_SIZE = "hlogFileSize";
   String WALFILE_SIZE_DESC = "Size of all WAL Files";
   String STOREFILE_COUNT = "storeFileCount";
   String STOREFILE_COUNT_DESC = "Number of Store Files";
   String MEMSTORE_SIZE = "memStoreSize";
   String MEMSTORE_SIZE_DESC = "Size of the memstore";
   String STOREFILE_SIZE = "storeFileSize";
   String STOREFILE_SIZE_DESC = "Size of storefiles being served.";
   String TOTAL_REQUEST_COUNT = "totalRequestCount";
   String TOTAL_REQUEST_COUNT_DESC =
       "Total number of requests this RegionServer has answered.";
   String READ_REQUEST_COUNT = "readRequestCount";
   String READ_REQUEST_COUNT_DESC =
       "Number of read requests this region server has answered.";
   String WRITE_REQUEST_COUNT = "writeRequestCount";
   String WRITE_REQUEST_COUNT_DESC =
       "Number of mutation requests this region server has answered.";
   String CHECK_MUTATE_FAILED_COUNT = "checkMutateFailedCount";
   String CHECK_MUTATE_FAILED_COUNT_DESC =
       "Number of Check and Mutate calls that failed the checks.";
   String CHECK_MUTATE_PASSED_COUNT = "checkMutatePassedCount";
   String CHECK_MUTATE_PASSED_COUNT_DESC =
       "Number of Check and Mutate calls that passed the checks.";
   String STOREFILE_INDEX_SIZE = "storeFileIndexSize";
   String STOREFILE_INDEX_SIZE_DESC = "Size of indexes in storefiles on disk.";
   String STATIC_INDEX_SIZE = "staticIndexSize";
   String STATIC_INDEX_SIZE_DESC = "Uncompressed size of the static indexes.";
   String STATIC_BLOOM_SIZE = "staticBloomSize";
   String STATIC_BLOOM_SIZE_DESC =
       "Uncompressed size of the static bloom filters.";
   String NUMBER_OF_MUTATIONS_WITHOUT_WAL = "mutationsWithoutWALCount";
   String NUMBER_OF_MUTATIONS_WITHOUT_WAL_DESC =
       "Number of mutations that have been sent by clients with the write ahead logging turned off.";
   String DATA_SIZE_WITHOUT_WAL = "mutationsWithoutWALSize";
   String DATA_SIZE_WITHOUT_WAL_DESC =
       "Size of data that has been sent by clients with the write ahead logging turned off.";
   String PERCENT_FILES_LOCAL = "percentFilesLocal";
   String PERCENT_FILES_LOCAL_DESC =
       "The percent of HFiles that are stored on the local hdfs data node.";
   String PERCENT_FILES_LOCAL_SECONDARY_REGIONS = "percentFilesLocalSecondaryRegions";
   String PERCENT_FILES_LOCAL_SECONDARY_REGIONS_DESC =
     "The percent of HFiles used by secondary regions that are stored on the local hdfs data node.";
   String SPLIT_QUEUE_LENGTH = "splitQueueLength";
   String SPLIT_QUEUE_LENGTH_DESC = "Length of the queue for splits.";
   String COMPACTION_QUEUE_LENGTH = "compactionQueueLength";
   String LARGE_COMPACTION_QUEUE_LENGTH = "largeCompactionQueueLength";
   String SMALL_COMPACTION_QUEUE_LENGTH = "smallCompactionQueueLength";
   String COMPACTION_QUEUE_LENGTH_DESC = "Length of the queue for compactions.";
   String FLUSH_QUEUE_LENGTH = "flushQueueLength";
   String FLUSH_QUEUE_LENGTH_DESC = "Length of the queue for region flushes";
   String BLOCK_CACHE_FREE_SIZE = "blockCacheFreeSize";
   String BLOCK_CACHE_FREE_DESC =
       "Size of the block cache that is not occupied.";
   String BLOCK_CACHE_COUNT = "blockCacheCount";
   String BLOCK_CACHE_COUNT_DESC = "Number of block in the block cache.";
   String BLOCK_CACHE_SIZE = "blockCacheSize";
   String BLOCK_CACHE_SIZE_DESC = "Size of the block cache.";
   String BLOCK_CACHE_HIT_COUNT = "blockCacheHitCount";
   String BLOCK_CACHE_HIT_COUNT_DESC = "Count of the hit on the block cache.";
   String BLOCK_CACHE_PRIMARY_HIT_COUNT = "blockCacheHitCountPrimary";
   String BLOCK_CACHE_PRIMARY_HIT_COUNT_DESC = "Count of hit on primary replica in the block cache.";
   String BLOCK_CACHE_MISS_COUNT = "blockCacheMissCount";
   String BLOCK_COUNT_MISS_COUNT_DESC =
       "Number of requests for a block that missed the block cache.";
   String BLOCK_CACHE_PRIMARY_MISS_COUNT = "blockCacheMissCountPrimary";
   String BLOCK_COUNT_PRIMARY_MISS_COUNT_DESC =
       "Number of requests for a block of primary replica that missed the block cache.";
   String BLOCK_CACHE_EVICTION_COUNT = "blockCacheEvictionCount";
   String BLOCK_CACHE_EVICTION_COUNT_DESC =
       "Count of the number of blocks evicted from the block cache.";
   String BLOCK_CACHE_PRIMARY_EVICTION_COUNT = "blockCacheEvictionCountPrimary";
   String BLOCK_CACHE_PRIMARY_EVICTION_COUNT_DESC =
       "Count of the number of blocks evicted from primary replica in the block cache.";
   String BLOCK_CACHE_HIT_PERCENT = "blockCacheCountHitPercent";
   String BLOCK_CACHE_HIT_PERCENT_DESC =
       "Percent of block cache requests that are hits";
   String BLOCK_CACHE_EXPRESS_HIT_PERCENT = "blockCacheExpressHitPercent";
   String BLOCK_CACHE_EXPRESS_HIT_PERCENT_DESC =
       "The percent of the time that requests with the cache turned on hit the cache.";
   String BLOCK_CACHE_FAILED_INSERTION_COUNT = "blockCacheFailedInsertionCount";
   String BLOCK_CACHE_FAILED_INSERTION_COUNT_DESC = "Number of times that a block cache " +
       "insertion failed. Usually due to size restrictions.";
   String RS_START_TIME_NAME = "regionServerStartTime";
   String ZOOKEEPER_QUORUM_NAME = "zookeeperQuorum";
   String SERVER_NAME_NAME = "serverName";
   String CLUSTER_ID_NAME = "clusterId";
   String RS_START_TIME_DESC = "RegionServer Start Time";
   String ZOOKEEPER_QUORUM_DESC = "Zookeeper Quorum";
   String SERVER_NAME_DESC = "Server Name";
   String CLUSTER_ID_DESC = "Cluster Id";
   String UPDATES_BLOCKED_TIME = "updatesBlockedTime";
   String UPDATES_BLOCKED_DESC =
       "Number of MS updates have been blocked so that the memstore can be flushed.";
   String DELETE_KEY = "delete";
   String GET_KEY = "get";
   String INCREMENT_KEY = "increment";
   String MUTATE_KEY = "mutate";
   String APPEND_KEY = "append";
   String REPLAY_KEY = "replay";
   String SCAN_NEXT_KEY = "scanNext";
   String SLOW_MUTATE_KEY = "slowPutCount";
   String SLOW_GET_KEY = "slowGetCount";
   String SLOW_DELETE_KEY = "slowDeleteCount";
   String SLOW_INCREMENT_KEY = "slowIncrementCount";
   String SLOW_APPEND_KEY = "slowAppendCount";
   String SLOW_MUTATE_DESC =
       "The number of Multis that took over 1000ms to complete";
   String SLOW_DELETE_DESC =
       "The number of Deletes that took over 1000ms to complete";
   String SLOW_GET_DESC = "The number of Gets that took over 1000ms to complete";
   String SLOW_INCREMENT_DESC =
       "The number of Increments that took over 1000ms to complete";
   String SLOW_APPEND_DESC =
       "The number of Appends that took over 1000ms to complete";
 
   String FLUSHED_CELLS = "flushedCellsCount";
   String FLUSHED_CELLS_DESC = "The number of cells flushed to disk";
   String FLUSHED_CELLS_SIZE = "flushedCellsSize";
   String FLUSHED_CELLS_SIZE_DESC = "The total amount of data flushed to disk, in bytes";
   String COMPACTED_CELLS = "compactedCellsCount";
   String COMPACTED_CELLS_DESC = "The number of cells processed during minor compactions";
   String COMPACTED_CELLS_SIZE = "compactedCellsSize";
   String COMPACTED_CELLS_SIZE_DESC =
       "The total amount of data processed during minor compactions, in bytes";
   String MAJOR_COMPACTED_CELLS = "majorCompactedCellsCount";
   String MAJOR_COMPACTED_CELLS_DESC =
       "The number of cells processed during major compactions";
   String MAJOR_COMPACTED_CELLS_SIZE = "majorCompactedCellsSize";
   String MAJOR_COMPACTED_CELLS_SIZE_DESC =
       "The total amount of data processed during major compactions, in bytes";
 
   String BLOCKED_REQUESTS_COUNT = "blockedRequestCount";
   String BLOCKED_REQUESTS_COUNT_DESC = "The number of blocked requests because of memstore size is "
       + "larger than blockingMemStoreSize";
 
   String SPLIT_KEY = "splitTime";
   String SPLIT_REQUEST_KEY = "splitRequestCount";
   String SPLIT_REQUEST_DESC = "Number of splits requested";
   String SPLIT_SUCCESS_KEY = "splitSuccessCount";
   String SPLIT_SUCCESS_DESC = "Number of successfully executed splits";
   String FLUSH_KEY = "flushTime";
 }