/**
    * 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.ipc;
  
  import io.netty.channel.epoll.EpollEventLoopGroup;
  import io.netty.channel.epoll.EpollSocketChannel;
  import io.netty.channel.nio.NioEventLoopGroup;
  import io.netty.channel.socket.nio.NioSocketChannel;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.List;
  
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.hbase.codec.Codec;
  import org.apache.hadoop.hbase.testclassification.RPCTests;
  import org.apache.hadoop.hbase.testclassification.SmallTests;
  import org.apache.hadoop.hbase.util.JVM;
  import org.junit.AfterClass;
  import org.junit.BeforeClass;
  import org.junit.experimental.categories.Category;
  import org.junit.runner.RunWith;
  import org.junit.runners.Parameterized;
  import org.junit.runners.Parameterized.Parameter;
  import org.junit.runners.Parameterized.Parameters;
  
  @RunWith(Parameterized.class)
  @Category({ RPCTests.class, SmallTests.class })
  public class TestNettyIPC extends AbstractTestIPC {
  
    @Parameters(name = "{index}: EventLoop={0}")
    public static Collection<Object[]> parameters() {
      List<Object[]> params = new ArrayList<>();
      params.add(new Object[] { "nio" });
      params.add(new Object[] { "perClientNio" });
      if (JVM.isLinux() && JVM.isAmd64()) {
        params.add(new Object[] { "epoll" });
      }
      return params;
    }
  
    @Parameter
    public String eventLoopType;
  
    private static NioEventLoopGroup NIO;
  
    private static EpollEventLoopGroup EPOLL;
  
    @BeforeClass
    public static void setUpBeforeClass() {
      NIO = new NioEventLoopGroup();
      if (JVM.isLinux() && JVM.isAmd64()) {
        EPOLL = new EpollEventLoopGroup();
      }
    }
  
    @AfterClass
    public static void tearDownAfterClass() {
      if (NIO != null) {
        NIO.shutdownGracefully();
      }
      if (EPOLL != null) {
        EPOLL.shutdownGracefully();
      }
    }
  
    private void setConf(Configuration conf) {
      switch (eventLoopType) {
        case "nio":
          NettyRpcClientConfigHelper.setEventLoopConfig(conf, NIO, NioSocketChannel.class);
          break;
        case "epoll":
          NettyRpcClientConfigHelper.setEventLoopConfig(conf, EPOLL, EpollSocketChannel.class);
          break;
        case "perClientNio":
          NettyRpcClientConfigHelper.createEventLoopPerClient(conf);
          break;
        default:
          break;
      }
    }
  
    @Override
    protected NettyRpcClient createRpcClientNoCodec(Configuration conf) {
     setConf(conf);
     return new NettyRpcClient(conf) {
 
       @Override
       Codec getCodec() {
         return null;
       }
 
     };
   }
 
   @Override
   protected NettyRpcClient createRpcClient(Configuration conf) {
     setConf(conf);
     return new NettyRpcClient(conf);
   }
 
   @Override
   protected NettyRpcClient createRpcClientRTEDuringConnectionSetup(Configuration conf) {
     setConf(conf);
     return new NettyRpcClient(conf) {
 
       @Override
       boolean isTcpNoDelay() {
         throw new RuntimeException("Injected fault");
       }
     };
   }
 }