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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.hadoop.hbase.replication.regionserver;
This class is for maintaining the various replication statistics for a sink and publishing them through the metrics interfaces.
public class MetricsSink {
  public static final String SINK_AGE_OF_LAST_APPLIED_OP =
  public static final String SINK_APPLIED_BATCHES =
  public static final String SINK_APPLIED_OPS =
  private long lastTimestampForAge = System.currentTimeMillis();
  private final MetricsReplicationSinkSource mss;
  public MetricsSink() {
     = CompatibilitySingletonFactory.getInstance(MetricsReplicationSourceFactory.class)
      .getSink();
  }

  
Set the age of the last applied operation

Parameters:
timestamp The timestamp of the last operation applied.
Returns:
the age that was set
  public long setAgeOfLastAppliedOp(long timestamp) {
    long age = 0;
    if ( != timestamp) {
       = timestamp;
      age = System.currentTimeMillis() - ;
    } 
    return age;
  }

  
Refreshing the age makes sure the value returned is the actual one and not the one set a replication time

Returns:
refreshed age
  public long refreshAgeOfLastAppliedOp() {
  }

  
Convience method to change metrics when a batch of operations are applied.

Parameters:
batchSize
  public void applyBatch(long batchSize) {
    .incrAppliedOps(batchSize);
  }

  
Get the Age of Last Applied Op

Returns:
ageOfLastAppliedOp
  public long getAgeOfLastAppliedOp() {
    return .getLastAppliedOpAge();
  }

  
Get the TimeStampOfLastAppliedOp. If no replication Op applied yet, the value is the timestamp at which hbase instance starts

Returns:
timeStampsOfLastAppliedOp;
  public long getTimeStampOfLastAppliedOp() {
    return this.;
  }
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