/**
    * 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,
   * WITHOUT 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.regionserver;
  
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.hbase.Abortable;
  import org.apache.hadoop.hbase.HConstants;
  import org.apache.hadoop.hbase.classification.InterfaceAudience;
  import org.apache.hadoop.hbase.classification.InterfaceStability;
  import org.apache.hadoop.hbase.ipc.FifoRpcScheduler;
  import org.apache.hadoop.hbase.ipc.PriorityFunction;
  import org.apache.hadoop.hbase.ipc.RpcScheduler;
  
  /**
   * Factory to use when you want to use the {@link FifoRpcScheduler}
   */
  @InterfaceAudience.Private
  @InterfaceStability.Evolving
  public class FifoRpcSchedulerFactory implements RpcSchedulerFactory {
    @Override
    public RpcScheduler create(Configuration conf, PriorityFunction priority, Abortable server) {
      int handlerCount = conf.getInt(HConstants.REGION_SERVER_HANDLER_COUNT,
        HConstants.DEFAULT_REGION_SERVER_HANDLER_COUNT);
      return new FifoRpcScheduler(conf, handlerCount);
    }
  
    @Deprecated
    @Override
    public RpcScheduler create(Configuration conf, PriorityFunction priority) {
      return create(conf, priority, null);
    }
  }