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 com.datastax.oss.driver.internal.core.metrics;
  
  import edu.umd.cs.findbugs.annotations.Nullable;
  import java.util.concurrent.TimeUnit;
  
  /**
   * Note about profiles names: they are included to keep the possibility to break up metrics per
   * profile in the future, but right now the default updater implementations ignore them. The driver
   * internals provide a profile name when it makes sense and is practical; in other cases, it passes
   * {@code null}.
   */
  public interface MetricUpdater<MetricT> {
  
    void incrementCounter(MetricT metric, @Nullable String profileName, long amount);
  
    default void incrementCounter(MetricT metric, @Nullable String profileName) {
      incrementCounter(metric, profileName, 1);
    }
  
    // note: currently unused
    void updateHistogram(MetricT metric, @Nullable String profileName, long value);
  
    void markMeter(MetricT metric, @Nullable String profileName, long amount);
  
    default void markMeter(MetricT metric, @Nullable String profileName) {
      markMeter(metric, profileName, 1);
    }
  
    void updateTimer(MetricT metric, @Nullable String profileName, long duration, TimeUnit unit);
  
    boolean isEnabled(MetricT metric, @Nullable String profileName);
  
    void clearMetrics();
  }
  