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.TableName;
023import org.apache.hadoop.hbase.procedure2.LockStatus;
024import org.apache.hadoop.hbase.procedure2.Procedure;
025import org.apache.yetus.audience.InterfaceAudience;
026
027/**
028 * @deprecated only used for {@link RecoverMetaProcedure}. Should be removed along with
029 *             {@link RecoverMetaProcedure}.
030 */
031@Deprecated
032@InterfaceAudience.Private
033class MetaQueue extends Queue<TableName> {
034
035  protected MetaQueue(LockStatus lockStatus) {
036    super(TableName.META_TABLE_NAME, 1, lockStatus);
037  }
038
039  @Override
040  boolean requireExclusiveLock(Procedure<?> proc) {
041    return true;
042  }
043
044  @Override
045  public String toString() {
046    return new ToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE).appendSuper(super.toString())
047      .build();
048  }
049}