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.master;
019
020import org.apache.hadoop.hbase.metrics.BaseSource;
021import org.apache.yetus.audience.InterfaceAudience;
022
023/**
024 * Interface that classes that expose metrics about the master will implement.
025 */
026@InterfaceAudience.Private
027public interface MetricsMasterProcSource extends BaseSource {
028
029  /**
030   * The name of the metrics
031   */
032  String METRICS_NAME = "Procedure";
033
034  /**
035   * The context metrics will be under.
036   */
037  String METRICS_CONTEXT = "master";
038
039  /**
040   * The name of the metrics context that metrics will be under in jmx
041   */
042  String METRICS_JMX_CONTEXT = "Master,sub=" + METRICS_NAME;
043
044  /**
045   * Description
046   */
047  String METRICS_DESCRIPTION = "Metrics about HBase master procedure";
048
049  // Strings used for exporting to metrics system.
050  String NUM_MASTER_WALS_NAME = "numMasterWALs";
051
052  String NUM_MASTER_WALS_DESC = "Number of master WAL files";
053
054}