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.commons.lang3.builder.ToStringBuilder;
021import org.apache.commons.lang3.builder.ToStringStyle;
022import org.apache.hadoop.hbase.ServerName;
023import org.apache.hadoop.hbase.procedure2.LockStatus;
024import org.apache.hadoop.hbase.procedure2.Procedure;
025import org.apache.yetus.audience.InterfaceAudience;
026
027@InterfaceAudience.Private
028class ServerQueue extends Queue<ServerName> {
029
030  public ServerQueue(ServerName serverName, int priority, LockStatus serverLock) {
031    super(serverName, priority, serverLock);
032  }
033
034  @Override
035  public boolean requireExclusiveLock(Procedure<?> proc) {
036    ServerProcedureInterface spi = (ServerProcedureInterface) proc;
037    switch (spi.getServerOperationType()) {
038      case CRASH_HANDLER:
039        return true;
040      case SWITCH_RPC_THROTTLE:
041      case SPLIT_WAL:
042      case SPLIT_WAL_REMOTE:
043      case CLAIM_REPLICATION_QUEUES:
044      case CLAIM_REPLICATION_QUEUE_REMOTE:
045      case VERIFY_SNAPSHOT:
046        return false;
047      default:
048        break;
049    }
050    throw new UnsupportedOperationException("unexpected type " + spi.getServerOperationType());
051  }
052
053  @Override
054  public String toString() {
055    return new ToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE).appendSuper(super.toString())
056      .build();
057  }
058}