/*
 * Licensed to the University of California, Berkeley 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 tachyon.util;

import java.util.concurrent.ThreadFactory;

import io.netty.channel.EventLoopGroup;
import io.netty.channel.ServerChannel;
import io.netty.channel.epoll.EpollEventLoopGroup;
import io.netty.channel.epoll.EpollServerSocketChannel;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;

import tachyon.worker.netty.ChannelType;

public final class NettyUtils {

  private NettyUtils() {}

  /**
   * Creates a Netty EventLoopGroup based on the IOMode.
   *
   * @param type Selector for which form of low-level IO we should use
   * @param numThreads
   * @param threadPrefix name pattern for each thread. should contain '%d' to distinguish between
   *        threads.
   */
  public static EventLoopGroup createEventLoop(ChannelType type, int numThreads,
      String threadPrefix) {
    ThreadFactory threadFactory = ThreadFactoryUtils.build(threadPrefix);

    switch (type) {
      case NIO:
        return new NioEventLoopGroup(numThreads, threadFactory);
      case EPOLL:
        return new EpollEventLoopGroup(numThreads, threadFactory);
      default:
        throw new IllegalArgumentException("Unknown io mode: " + type);
    }
  }

  /**
   * Returns the correct ServerSocketChannel class based on ChannelType.
   *
   * @param type Selector for which form of low-level IO we should use
   */
  public static Class<? extends ServerChannel> getServerChannelClass(ChannelType type) {
    switch (type) {
      case NIO:
        return NioServerSocketChannel.class;
      case EPOLL:
        return EpollServerSocketChannel.class;
      default:
        throw new IllegalArgumentException("Unknown io mode: " + type);
    }
  }
}

/*
 * Licensed to the University of California, Berkeley 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 tachyon.util;

import java.util.concurrent.ThreadFactory;

import io.netty.channel.EventLoopGroup;
import io.netty.channel.ServerChannel;
import io.netty.channel.epoll.EpollEventLoopGroup;
import io.netty.channel.epoll.EpollServerSocketChannel;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;

import tachyon.worker.netty.ChannelType;

public final class NettyUtils {

  private NettyUtils() {}

  /**
   * Creates a Netty EventLoopGroup based on the IOMode.
   *
   * @param type Selector for which form of low-level IO we should use
   * @param numThreads
   * @param threadPrefix name pattern for each thread. should contain '%d' to distinguish between
   *        threads.
   */
  public static EventLoopGroup createEventLoop(ChannelType type, int numThreads,
      String threadPrefix) {
    ThreadFactory threadFactory = ThreadFactoryUtils.build(threadPrefix);

    switch (type) {
      case NIO:
        return new NioEventLoopGroup(numThreads, threadFactory);
      case EPOLL:
        return new EpollEventLoopGroup(numThreads, threadFactory);
      default:
        throw new IllegalArgumentException("Unknown io type: " + type);
    }
  }

  /**
   * Returns the correct ServerSocketChannel class based on ChannelType.
   *
   * @param type Selector for which form of low-level IO we should use
   */
  public static Class<? extends ServerChannel> getServerChannelClass(ChannelType type) {
    switch (type) {
      case NIO:
        return NioServerSocketChannel.class;
      case EPOLL:
        return EpollServerSocketChannel.class;
      default:
        throw new IllegalArgumentException("Unknown io type: " + type);
    }
  }
}

Update NettyUtils.java