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.regionserver;
019
020import org.apache.hadoop.conf.Configuration;
021import org.apache.hadoop.hbase.Abortable;
022import org.apache.hadoop.hbase.HConstants;
023import org.apache.hadoop.hbase.ipc.MasterFifoRpcScheduler;
024import org.apache.hadoop.hbase.ipc.PriorityFunction;
025import org.apache.hadoop.hbase.ipc.RpcScheduler;
026import org.apache.yetus.audience.InterfaceAudience;
027import org.apache.yetus.audience.InterfaceStability;
028
029/**
030 * Factory to use when you want to use the {@link MasterFifoRpcScheduler}
031 */
032@InterfaceAudience.Private
033@InterfaceStability.Evolving
034public class MasterFifoRpcSchedulerFactory extends FifoRpcSchedulerFactory {
035  @Override
036  public RpcScheduler create(Configuration conf, PriorityFunction priority, Abortable server) {
037    int totalHandlerCount = conf.getInt(HConstants.REGION_SERVER_HANDLER_COUNT,
038      HConstants.DEFAULT_REGION_SERVER_HANDLER_COUNT);
039    int rsReportHandlerCount = Math.max(1, conf
040      .getInt(MasterFifoRpcScheduler.MASTER_SERVER_REPORT_HANDLER_COUNT, totalHandlerCount / 2));
041    int callHandlerCount = Math.max(1, totalHandlerCount - rsReportHandlerCount);
042    return new MasterFifoRpcScheduler(conf, callHandlerCount, rsReportHandlerCount);
043  }
044}