001/*
002 *
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements.  See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership.  The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License.  You may obtain a copy of the License at
010 *
011 *     http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 */
019
020package org.apache.hadoop.hbase.namequeues;
021
022import org.apache.yetus.audience.InterfaceAudience;
023
024/**
025 * Base payload to be prepared by client to send various namedQueue events for in-memory
026 * ring buffer storage in either HMaster or RegionServer.
027 * e.g slowLog responses
028 */
029@InterfaceAudience.Private
030public class NamedQueuePayload {
031
032  public enum NamedQueueEvent {
033    SLOW_LOG(0),
034    BALANCE_DECISION(1);
035
036    private final int value;
037
038    NamedQueueEvent(int i) {
039      this.value = i;
040    }
041
042    public static NamedQueueEvent getEventByOrdinal(int value){
043      switch (value) {
044        case 0: {
045          return SLOW_LOG;
046        }
047        case 1: {
048          return BALANCE_DECISION;
049        }
050        default: {
051          throw new IllegalArgumentException(
052            "NamedQueue event with ordinal " + value + " not defined");
053        }
054      }
055    }
056
057    public int getValue() {
058      return value;
059    }
060  }
061
062  private final NamedQueueEvent namedQueueEvent;
063
064  public NamedQueuePayload(int eventOrdinal) {
065    this.namedQueueEvent = NamedQueueEvent.getEventByOrdinal(eventOrdinal);
066  }
067
068  public NamedQueueEvent getNamedQueueEvent() {
069    return namedQueueEvent;
070  }
071
072}