com.codahale.grpcproxy.util.Netty.java Source code

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Here is the source code for com.codahale.grpcproxy.util.Netty.java

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/*
 * Licensed 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 com.codahale.grpcproxy.util;

import io.netty.channel.Channel;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.ServerChannel;
import io.netty.channel.epoll.Epoll;
import io.netty.channel.epoll.EpollEventLoopGroup;
import io.netty.channel.epoll.EpollServerSocketChannel;
import io.netty.channel.epoll.EpollSocketChannel;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Netty {

    private static final Logger LOGGER = LoggerFactory.getLogger(Netty.class);
    private static final int WORKER_THREADS = Runtime.getRuntime().availableProcessors() * 2;

    static {
        if (Epoll.isAvailable()) {
            LOGGER.info("Using epoll");
        } else {
            LOGGER.info("Using java.nio");
        }
    }

    public static EventLoopGroup newBossEventLoopGroup() {
        if (Epoll.isAvailable()) {
            return new EpollEventLoopGroup();
        }
        return new NioEventLoopGroup();
    }

    public static EventLoopGroup newWorkerEventLoopGroup() {
        if (Epoll.isAvailable()) {
            return new EpollEventLoopGroup(WORKER_THREADS);
        }
        return new NioEventLoopGroup(WORKER_THREADS);
    }

    public static Class<? extends ServerChannel> serverChannelType() {
        if (Epoll.isAvailable()) {
            return EpollServerSocketChannel.class;
        }
        return NioServerSocketChannel.class;
    }

    public static Class<? extends Channel> clientChannelType() {
        if (Epoll.isAvailable()) {
            return EpollSocketChannel.class;
        }
        return NioSocketChannel.class;
    }
}