src/core/org/apache/hadoop/metrics2/MetricCounter.java

/**
 * 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.metrics2;

/**
 * A generic immutable counter metric type
 * @param <T> value type of the metric
 */
public abstract class MetricCounter<T extends Number> extends Metric {

  /**
   * Construct a counter metric
   * @param name  of the metric
   * @param description of the metric
   */
  public MetricCounter(String name, String description) {
    super(name, description);
  }

  public abstract T value();

}