content: /*
   * 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.cassandra.metrics;
  
  import static org.apache.cassandra.metrics.CassandraMetricsRegistry.Metrics;
  
  import com.codahale.metrics.Counter;
  import com.codahale.metrics.Timer;
  import com.codahale.metrics.Gauge;
  
  public class ViewWriteMetrics extends ClientRequestMetrics
  {
      public final Counter viewReplicasAttempted;
      public final Counter viewReplicasSuccess;
      // time between when mutation is applied to local memtable to when CL.ONE is achieved on MV
      public final Timer viewWriteLatency;
  
      public ViewWriteMetrics(String scope)
      {
          super(scope);
          viewReplicasAttempted = Metrics.counter(factory.createMetricName("ViewReplicasAttempted"));
          viewReplicasSuccess = Metrics.counter(factory.createMetricName("ViewReplicasSuccess"));
          viewWriteLatency = Metrics.timer(factory.createMetricName("ViewWriteLatency"));
          Metrics.register(factory.createMetricName("ViewPendingMutations"), new Gauge<Long>()
                  {
                      public Long getValue()
                      {
                          return viewReplicasAttempted.getCount() - viewReplicasSuccess.getCount();
                      }
                  });
      }
  
      public void release()
      {
          super.release();
          Metrics.remove(factory.createMetricName("ViewReplicasAttempted"));
          Metrics.remove(factory.createMetricName("ViewReplicasSuccess"));
          Metrics.remove(factory.createMetricName("ViewWriteLatency"));
          Metrics.remove(factory.createMetricName("ViewPendingMutations"));
      }
  }
  