/**
    * 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 com.google.common.annotations.VisibleForTesting;
  import org.apache.hadoop.hbase.classification.InterfaceAudience;
  import org.apache.hadoop.hbase.classification.InterfaceStability;
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.hbase.CompatibilitySingletonFactory;
  import org.apache.hadoop.hbase.TableName;
  
  /**
   * <p>
   * This class is for maintaining the various regionserver statistics
   * and publishing them through the metrics interfaces.
   * </p>
   * This class has a number of metrics variables that are publicly accessible;
   * these variables (objects) have methods to update their values.
   */
  @InterfaceStability.Evolving
  @InterfaceAudience.Private
  public class MetricsRegionServer {
    public static final String RS_ENABLE_TABLE_METRICS_KEY =
        "hbase.regionserver.enable.table.latencies";
    public static final boolean RS_ENABLE_TABLE_METRICS_DEFAULT = true;
  
    private MetricsRegionServerSource serverSource;
    private MetricsRegionServerWrapper regionServerWrapper;
    private RegionServerTableMetrics tableMetrics;
  
    public MetricsRegionServer(
        MetricsRegionServerWrapper regionServerWrapper, Configuration conf) {
      this(regionServerWrapper,
          CompatibilitySingletonFactory.getInstance(MetricsRegionServerSourceFactory.class)
              .createServer(regionServerWrapper),
          createTableMetrics(conf));
    }
  
    MetricsRegionServer(MetricsRegionServerWrapper regionServerWrapper,
                        MetricsRegionServerSource serverSource,
                        RegionServerTableMetrics tableMetrics) {
      this.regionServerWrapper = regionServerWrapper;
      this.serverSource = serverSource;
      this.tableMetrics = tableMetrics;
    }
  
    /**
     * Creates an instance of {@link RegionServerTableMetrics} only if the feature is enabled.
     */
    static RegionServerTableMetrics createTableMetrics(Configuration conf) {
      if (conf.getBoolean(RS_ENABLE_TABLE_METRICS_KEY, RS_ENABLE_TABLE_METRICS_DEFAULT)) {
        return new RegionServerTableMetrics();
      }
      return null;
    }
  
    @VisibleForTesting
    public MetricsRegionServerSource getMetricsSource() {
      return serverSource;
    }
  
    public MetricsRegionServerWrapper getRegionServerWrapper() {
      return regionServerWrapper;
    }
  
    public void updatePut(TableName tn, long t) {
      if (tableMetrics != null && tn != null) {
        tableMetrics.updatePut(tn, t);
      }
      if (t > 1000) {
        serverSource.incrSlowPut();
      }
      serverSource.updatePut(t);
    }
  
    public void updateDelete(TableName tn, long t) {
      if (tableMetrics != null && tn != null) {
        tableMetrics.updateDelete(tn, t);
      }
      if (t > 1000) {
        serverSource.incrSlowDelete();
      }
      serverSource.updateDelete(t);
    }
 
   public void updateGet(TableName tn, long t) {
     if (tableMetrics != null && tn != null) {
       tableMetrics.updateGet(tn, t);
     }
     if (t > 1000) {
       serverSource.incrSlowGet();
     }
     serverSource.updateGet(t);
   }
 
   public void updateIncrement(TableName tn, long t) {
     if (tableMetrics != null && tn != null) {
       tableMetrics.updateIncrement(tn, t);
     }
     if (t > 1000) {
       serverSource.incrSlowIncrement();
     }
     serverSource.updateIncrement(t);
   }
 
   public void updateAppend(TableName tn, long t) {
     if (tableMetrics != null && tn != null) {
       tableMetrics.updateAppend(tn, t);
     }
     if (t > 1000) {
       serverSource.incrSlowAppend();
     }
     serverSource.updateAppend(t);
   }
 
   public void updateReplay(long t){
     serverSource.updateReplay(t);
   }
 
   public void updateScanSize(TableName tn, long scanSize){
     if (tableMetrics != null && tn != null) {
       tableMetrics.updateScanSize(tn, scanSize);
     }
     serverSource.updateScanSize(scanSize);
   }
 
   public void updateScanTime(TableName tn, long t) {
     if (tableMetrics != null && tn != null) {
       tableMetrics.updateScanTime(tn, t);
     }
     serverSource.updateScanTime(t);
   }
 
   public void updateSplitTime(long t) {
     serverSource.updateSplitTime(t);
   }
 
   public void incrSplitRequest() {
     serverSource.incrSplitRequest();
   }
 
   public void incrSplitSuccess() {
     serverSource.incrSplitSuccess();
   }
 
   public void updateFlush(long t, long memstoreSize, long fileSize) {
     serverSource.updateFlushTime(t);
     serverSource.updateFlushMemstoreSize(memstoreSize);
     serverSource.updateFlushOutputSize(fileSize);
   }
 
   public void updateCompaction(boolean isMajor, long t, int inputFileCount, int outputFileCount,
       long inputBytes, long outputBytes) {
     serverSource.updateCompactionTime(isMajor, t);
     serverSource.updateCompactionInputFileCount(isMajor, inputFileCount);
     serverSource.updateCompactionOutputFileCount(isMajor, outputFileCount);
     serverSource.updateCompactionInputSize(isMajor, inputBytes);
     serverSource.updateCompactionOutputSize(isMajor, outputBytes);
   }
 }