hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/ProcedureDeque.java

/**

 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUTKey WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hadoop.hbase.procedure2;

import java.util.ArrayDeque;

import org.apache.yetus.audience.InterfaceAudience;

/**
 * Type class.
 * For conceptual purpose only. Seeing ProcedureDeque as type instead of just ArrayDeque gives
 * more understanding that it's a queue of waiting procedures.
 */
@InterfaceAudience.Private
public class ProcedureDeque extends ArrayDeque<Procedure> {
  public ProcedureDeque() {
    // Default is 16 for a list that is rarely used; elements will resize if too small.
    super(2);
  }
}