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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 org.apache.phoenix.hbase.index.metrics;

import org.apache.hadoop.hbase.metrics.BaseSource;

/**
 * Interface for metrics about {@link org.apache.phoenix.hbase.index.Indexer}.
 */
public interface MetricsIndexerSource extends BaseSource {
  // Metrics2 and JMX constants
  String METRICS_NAME = "PhoenixIndexer";
  String METRICS_CONTEXT = "phoenix";
  String METRICS_DESCRIPTION = "Metrics about the Phoenix Indexer";
  String METRICS_JMX_CONTEXT = "RegionServer,sub=" + METRICS_NAME;

  String INDEX_PREPARE_TIME = "indexPrepareTime";
  String INDEX_PREPARE_TIME_DESC = "Histogram for the time in milliseconds for preparing an index write";
  String SLOW_INDEX_PREPARE = "slowIndexPrepareCalls";
  String SLOW_INDEX_PREPARE_DESC = "The number of index preparations slower than the configured threshold";

  String INDEX_WRITE_TIME = "indexWriteTime";
  String INDEX_WRITE_TIME_DESC = "Histogram for the time in milliseconds for writing an index update";
  String SLOW_INDEX_WRITE = "slowIndexWriteCalls";
  String SLOW_INDEX_WRITE_DESC = "The number of index writes slower than the configured threshold";

  String DUPLICATE_KEY_TIME = "duplicateKeyCheckTime";
  String DUPLICATE_KEY_TIME_DESC = "Histogram for the time in milliseconds to handle ON DUPLICATE keywords";
  String SLOW_DUPLICATE_KEY = "slowDuplicateKeyCheckCalls";
  String SLOW_DUPLICATE_KEY_DESC = "The number of on duplicate key checks slower than the configured threshold";

  String PRE_WAL_RESTORE_TIME = "preWALRestoreTime";
  String PRE_WAL_RESTORE_TIME_DESC = "Histogram for the time in milliseconds for Indexer's preWALRestore";
  String SLOW_PRE_WAL_RESTORE = "slowPreWALRestoreCalls";
  String SLOW_PRE_WAL_RESTORE_DESC = "The number of preWALRestore calls slower than the configured threshold";

  String POST_PUT_TIME = "postPutTime";
  String POST_PUT_TIME_DESC = "Histogram for the time in milliseconds for Indexer's postPut";
  String SLOW_POST_PUT = "slowPostPutCalls";
  String SLOW_POST_PUT_DESC = "The number of postPut calls slower than the configured threshold";

  String POST_DELETE_TIME = "postDeleteTime";
  String POST_DELETE_TIME_DESC = "Histogram for the time in milliseconds for Indexer's postDelete";
  String SLOW_POST_DELETE = "slowPostDeleteCalls";
  String SLOW_POST_DELETE_DESC = "The number of postDelete calls slower than the configured threshold";

  String POST_OPEN_TIME = "postOpenTime";
  String POST_OPEN_TIME_DESC = "Histogram for the time in milliseconds for Indexer's postOpen";
  String SLOW_POST_OPEN = "slowPostOpenCalls";
  String SLOW_POST_OPEN_DESC = "The number of postOpen calls slower than the configured threshold";

  String PRE_INDEX_UPDATE_TIME = "preIndexUpdateTime";
  String PRE_INDEX_UPDATE_TIME_DESC = "Histogram for the time in milliseconds for index updates pre data updates";
  String POST_INDEX_UPDATE_TIME = "postIndexUpdateTime";
  String POST_INDEX_UPDATE_TIME_DESC = "Histogram for the time in milliseconds for index updates post data updates";

  String PRE_INDEX_UPDATE_FAILURE_TIME = "preIndexUpdateFailureTime";
  String PRE_INDEX_UPDATE_FAILURE_TIME_DESC = "Histogram for the time in milliseconds on failures of index updates pre data updates";
  String POST_INDEX_UPDATE_FAILURE_TIME = "postIndexUpdateFailureTime";
  String POST_INDEX_UPDATE_FAILURE_TIME_DESC = "Histogram for the time in milliseconds on failures of index updates post data updates";

  String PRE_INDEX_UPDATE_FAILURE = "preIndexUpdateFailure";
  String PRE_INDEX_UPDATE_FAILURE_DESC = "The number of failures of index updates pre data updates";
  String POST_INDEX_UPDATE_FAILURE = "postIndexUpdateFailure";
  String POST_INDEX_UPDATE_FAILURE_DESC = "The number of failures of index updates post data updates";

  /**
   * Updates the index preparation time histogram (preBatchMutate).
   * @param dataTableName  Physical data table name
   * @param t time taken in milliseconds
   */
  void updateIndexPrepareTime(String dataTableName, long t);

  /**
   * @param dataTableName  Physical data table name
   * Increments the number of slow calls prepare an index write.
   */
  void incrementNumSlowIndexPrepareCalls(String dataTableName);

  /**
   * Updates the index write time histogram (postBatchMutate).
   * @param dataTableName  Physical data table name
   * @param t time taken in milliseconds
   */
  void updateIndexWriteTime(String dataTableName, long t);

  /**
   * Increments the number of slow calls to write to the index.
   * @param dataTableName  Physical data table name
   */
  void incrementNumSlowIndexWriteCalls(String dataTableName);

  /**
   * Updates the preWALRestore time histogram.
   * @param dataTableName Physical data table name
   * @param t time taken in milliseconds
   */
  void updatePreWALRestoreTime(String dataTableName, long t);

  /**
   * Increments the number of slow preWALRestore calls.
   * @param dataTableName Physical data table name
   */
  void incrementNumSlowPreWALRestoreCalls(String dataTableName);

  /**
   * Updates the postPut time histogram.
   * @param dataTableName  Physical data table name
   * @param t time taken in milliseconds
   */
  void updatePostPutTime(String dataTableName, long t);

  /**
   * Increments the number of slow postPut calls.
   * @param dataTableName  Physical data table name
   */
  void incrementNumSlowPostPutCalls(String dataTableName);

  /**
   * Updates the postDelete time histogram.
   * @param dataTableName  Physical data table name
   * @param t time taken in milliseconds
   */
  void updatePostDeleteTime(String dataTableName, long t);

  /**
   * Increments the number of slow postDelete calls.
   * @param dataTableName  Physical data table name
   */
  void incrementNumSlowPostDeleteCalls(String dataTableName);

  /**
   * Updates the postOpen time histogram.
   * @param dataTableName Physical data table name
   * @param t time taken in milliseconds
   */
  void updatePostOpenTime(String dataTableName, long t);

  /**
   * Increments the number of slow postOpen calls.
   * @param dataTableName Physical data table name
   */
  void incrementNumSlowPostOpenCalls(String dataTableName);

  /**
   * Updates the preIncrementAfterRowLock time histogram.
   * @param dataTableName Physical data table name
   * @param t time taken in milliseconds
   */
  void updateDuplicateKeyCheckTime(String dataTableName, long t);

  /**
   * Increments the number of slow preIncrementAfteRowLock calls.
   * @param dataTableName Phyiscal data table name
   */
  void incrementSlowDuplicateKeyCheckCalls(String dataTableName);

  // Below metrics are introduced by IndexRegionObserver coprocessor
  /**
   * Updates the pre index update time histogram.
   * @param dataTableName  Physical data table name
   * @param t time taken in milliseconds
   */
  void updatePreIndexUpdateTime(String dataTableName, long t);

  /**
   * Updates the post index update time histogram.
   * @param dataTableName  Physical data table name
   * @param t time taken in milliseconds
   */
  void updatePostIndexUpdateTime(String dataTableName, long t);

  /**
   * Updates the pre index update failure time histogram.
   * @param dataTableName  Physical data table name
   * @param t time taken in milliseconds
   */
  void updatePreIndexUpdateFailureTime(String dataTableName, long t);

  /**
   * Updates the post index update failure time histogram.
   * @param dataTableName  Physical data table name
   * @param t time taken in milliseconds
   */
  void updatePostIndexUpdateFailureTime(String dataTableName, long t);

  /**
   * Increments the number of pre index update failures.
   * @param dataTableName  Physical data table name
   */
  void incrementPreIndexUpdateFailures(String dataTableName);

  /**
   * Increments the number of post index update failures.
   * @param dataTableName  Physical data table name
   */
  void incrementPostIndexUpdateFailures(String dataTableName);
}