Counter.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.hive.metastore.hbase;

import com.google.common.annotations.VisibleForTesting;

/**
 * A simple metric to count how many times something occurs.
 */
class Counter {
  private final String name;
  private long cnt;

  Counter(String name) {
    this.name = name;
    cnt = 0;
  }

  void incr() {
    cnt++;
  }

  void clear() {
    cnt = 0;
  }

  String dump() {
    StringBuilder bldr = new StringBuilder("Dumping metric: ");
    bldr.append(name).append(' ').append(cnt);
    return bldr.toString();
  }

  @VisibleForTesting long getCnt() {
    return cnt;
  }

}