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      case VERIFY_SNAPSHOT:
044        return false;
045      default:
046        break;
047    }
048    throw new UnsupportedOperationException("unexpected type " + spi.getServerOperationType());
049  }
050}