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.procedure; 019 020import org.apache.hadoop.hbase.ServerName; 021import org.apache.hadoop.hbase.procedure2.LockStatus; 022import org.apache.hadoop.hbase.procedure2.Procedure; 023import org.apache.yetus.audience.InterfaceAudience; 024 025@InterfaceAudience.Private 026class ServerQueue extends Queue<ServerName> { 027 028 public ServerQueue(ServerName serverName, int priority, LockStatus serverLock) { 029 super(serverName, priority, serverLock); 030 } 031 032 @Override 033 public boolean requireExclusiveLock(Procedure<?> proc) { 034 ServerProcedureInterface spi = (ServerProcedureInterface) proc; 035 switch (spi.getServerOperationType()) { 036 case CRASH_HANDLER: 037 return true; 038 case SWITCH_RPC_THROTTLE: 039 case SPLIT_WAL: 040 case SPLIT_WAL_REMOTE: 041 case CLAIM_REPLICATION_QUEUES: 042 case CLAIM_REPLICATION_QUEUE_REMOTE: 043 return false; 044 default: 045 break; 046 } 047 throw new UnsupportedOperationException("unexpected type " + spi.getServerOperationType()); 048 } 049}