com.streamsets.pipeline.lib.udp.UDPConsumingServer.java Source code

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Here is the source code for com.streamsets.pipeline.lib.udp.UDPConsumingServer.java

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/*
 * Copyright 2017 StreamSets Inc.
 *
 * 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.streamsets.pipeline.lib.udp;

import com.streamsets.pipeline.lib.network.BaseNettyServer;
import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.PooledByteBufAllocator;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.epoll.EpollChannelOption;
import io.netty.channel.epoll.EpollDatagramChannel;
import io.netty.channel.epoll.EpollEventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.DatagramPacket;
import io.netty.channel.socket.nio.NioDatagramChannel;

import java.net.InetSocketAddress;
import java.util.List;

public class UDPConsumingServer extends BaseNettyServer {

    private final SimpleChannelInboundHandler<DatagramPacket> handler;

    public UDPConsumingServer(boolean enableEpoll, int numThreads, List<InetSocketAddress> addresses,
            UDPConsumer udpConsumer) {
        this(enableEpoll, numThreads, addresses, new UDPConsumingServerHandler(udpConsumer));
    }

    public UDPConsumingServer(boolean enableEpoll, int numThreads, List<InetSocketAddress> addresses,
            SimpleChannelInboundHandler<DatagramPacket> handler) {
        super(enableEpoll, numThreads, addresses);
        this.handler = handler;
    }

    @Override
    protected Bootstrap bootstrap(boolean enableEpoll) {
        if (enableEpoll) {
            // Direct buffers required for Epoll
            enableDirectBuffers();
            EventLoopGroup group = new EpollEventLoopGroup(numThreads);
            groups.add(group);
            return new Bootstrap().group(group).channel(EpollDatagramChannel.class).handler(handler)
                    .option(EpollChannelOption.SO_REUSEADDR, true).option(EpollChannelOption.SO_REUSEPORT, true)
                    .option(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT);
        } else {
            disableDirectBuffers();
            EventLoopGroup group = new NioEventLoopGroup(numThreads);
            groups.add(group);
            return new Bootstrap().group(group).channel(NioDatagramChannel.class).handler(handler)
                    .option(ChannelOption.SO_REUSEADDR, true)
                    .option(ChannelOption.ALLOCATOR, new PooledByteBufAllocator()); // use on-heap buffers
        }
    }
}