001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.metrics;
019
020import org.apache.hadoop.metrics2.MetricsInfo;
021import org.apache.yetus.audience.InterfaceAudience;
022
023import org.apache.hbase.thirdparty.com.google.common.base.MoreObjects;
024import org.apache.hbase.thirdparty.com.google.common.base.Objects;
025import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;
026
027/**
028 * Making implementing metric info a little easier
029 */
030@InterfaceAudience.Private
031class MetricsInfoImpl implements MetricsInfo {
032  private final String name, description;
033
034  MetricsInfoImpl(String name, String description) {
035    this.name = Preconditions.checkNotNull(name, "name");
036    this.description = Preconditions.checkNotNull(description, "description");
037  }
038
039  @Override
040  public String name() {
041    return name;
042  }
043
044  @Override
045  public String description() {
046    return description;
047  }
048
049  @Override
050  public boolean equals(Object obj) {
051    if (obj instanceof MetricsInfo) {
052      MetricsInfo other = (MetricsInfo) obj;
053      return Objects.equal(name, other.name()) && Objects.equal(description, other.description());
054    }
055    return false;
056  }
057
058  @Override
059  public int hashCode() {
060    return Objects.hashCode(name, description);
061  }
062
063  @Override
064  public String toString() {
065    return MoreObjects.toStringHelper(this).add("name", name).add("description", description)
066      .toString();
067  }
068}