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 */
018
019package org.apache.hadoop.hbase.metrics;
020
021import org.apache.hadoop.metrics2.MetricsInfo;
022import org.apache.yetus.audience.InterfaceAudience;
023
024import org.apache.hbase.thirdparty.com.google.common.base.MoreObjects;
025import org.apache.hbase.thirdparty.com.google.common.base.Objects;
026import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;
027
028/**
029 * Making implementing metric info a little easier
030 */
031@InterfaceAudience.Private
032class MetricsInfoImpl implements MetricsInfo {
033  private final String name, description;
034
035  MetricsInfoImpl(String name, String description) {
036    this.name = Preconditions.checkNotNull(name, "name");
037    this.description = Preconditions.checkNotNull(description, "description");
038  }
039
040  @Override public String name() {
041    return name;
042  }
043
044  @Override public String description() {
045    return description;
046  }
047
048  @Override public boolean equals(Object obj) {
049    if (obj instanceof MetricsInfo) {
050      MetricsInfo other = (MetricsInfo) obj;
051      return Objects.equal(name, other.name()) &&
052          Objects.equal(description, other.description());
053    }
054    return false;
055  }
056
057  @Override public int hashCode() {
058    return Objects.hashCode(name, description);
059  }
060
061  @Override public String toString() {
062    return MoreObjects.toStringHelper(this)
063        .add("name", name).add("description", description)
064        .toString();
065  }
066}