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.assignment; 019 020import java.util.List; 021import java.util.Set; 022import java.util.concurrent.ConcurrentHashMap; 023import java.util.concurrent.locks.Lock; 024import java.util.concurrent.locks.ReadWriteLock; 025import java.util.concurrent.locks.ReentrantReadWriteLock; 026import java.util.stream.Collectors; 027import org.apache.hadoop.hbase.ServerName; 028import org.apache.hadoop.hbase.client.RegionInfo; 029import org.apache.yetus.audience.InterfaceAudience; 030 031/** 032 * State of Server; list of hosted regions, etc. 033 */ 034@InterfaceAudience.Private 035public class ServerStateNode implements Comparable<ServerStateNode> { 036 private final Set<RegionStateNode> regions; 037 private final ServerName serverName; 038 private final ReadWriteLock lock = new ReentrantReadWriteLock(); 039 private volatile ServerState state = ServerState.ONLINE; 040 041 public ServerStateNode(ServerName serverName) { 042 this.serverName = serverName; 043 this.regions = ConcurrentHashMap.newKeySet(); 044 } 045 046 public ServerName getServerName() { 047 return serverName; 048 } 049 050 public ServerState getState() { 051 return state; 052 } 053 054 public boolean isInState(final ServerState... expected) { 055 boolean expectedState = false; 056 if (expected != null) { 057 for (int i = 0; i < expected.length; ++i) { 058 expectedState |= (state == expected[i]); 059 } 060 } 061 return expectedState; 062 } 063 064 void setState(final ServerState state) { 065 this.state = state; 066 } 067 068 public int getRegionCount() { 069 return regions.size(); 070 } 071 072 public List<RegionInfo> getRegionInfoList() { 073 return regions.stream().map(RegionStateNode::getRegionInfo).collect(Collectors.toList()); 074 } 075 076 public List<RegionInfo> getSystemRegionInfoList() { 077 return regions.stream().filter(RegionStateNode::isSystemTable) 078 .map(RegionStateNode::getRegionInfo).collect(Collectors.toList()); 079 } 080 081 public void addRegion(final RegionStateNode regionNode) { 082 this.regions.add(regionNode); 083 } 084 085 public void removeRegion(final RegionStateNode regionNode) { 086 this.regions.remove(regionNode); 087 } 088 089 public Lock readLock() { 090 return lock.readLock(); 091 } 092 093 public Lock writeLock() { 094 return lock.writeLock(); 095 } 096 097 @Override 098 public int compareTo(final ServerStateNode other) { 099 return getServerName().compareTo(other.getServerName()); 100 } 101 102 @Override 103 public int hashCode() { 104 return getServerName().hashCode(); 105 } 106 107 @Override 108 public boolean equals(final Object other) { 109 if (this == other) { 110 return true; 111 } 112 if (!(other instanceof ServerStateNode)) { 113 return false; 114 } 115 return compareTo((ServerStateNode) other) == 0; 116 } 117 118 @Override 119 public String toString() { 120 return getServerName() + "/" + getState() + "/regionCount=" + this.regions.size() + "/lock=" 121 + this.lock; 122 } 123}