com.feingto.iot.common.bootstrap.MqttConsumerBootstrap Maven / Gradle / Ivy

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package com.feingto.iot.common.bootstrap;

import com.feingto.iot.common.config.properties.NettyProperties;
import com.feingto.iot.common.handler.MessageConsumeChannelHandler;
import com.feingto.iot.common.service.mqtt.IMessageConsume;
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.timeout.IdleStateHandler;
import io.netty.util.concurrent.DefaultThreadFactory;
import lombok.Setter;
import lombok.experimental.Accessors;
import lombok.extern.slf4j.Slf4j;

import javax.annotation.PreDestroy;
import java.util.concurrent.TimeUnit;

/**
 * MQTT 消费者启动器
 *
 * @author longfei
 */
@Slf4j
@Accessors(fluent = true)
public class MqttConsumerBootstrap {
    private final NettyProperties config;
    private EventLoopGroup group;
    @Setter
    private IMessageConsume messageService;

    public MqttConsumerBootstrap(NettyProperties config) {
        this.config = config;
    }

    public Channel start() throws InterruptedException {
        group = new NioEventLoopGroup(config.getWorkThread(), new DefaultThreadFactory("CLIENT_"));
        NettyProperties.Mqtt mqtt = config.getMqtt();
        Bootstrap bootstrap = new Bootstrap()
                .group(group)
                .channel(NioSocketChannel.class)
                .option(ChannelOption.TCP_NODELAY, true)
                .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, mqtt.getTimeout())
                .handler(new ChannelInitializer() {
                    @Override
                    protected void initChannel(SocketChannel ch) {
                        if (mqtt.getKeepAliveInterval() > 0) {
                            ch.pipeline()
                                    .addLast(new IdleStateHandler(0,
                                            mqtt.getKeepAliveInterval(), 0, TimeUnit.SECONDS));
                        }
                        SimpleHandlerLoader.getMqttChannelHandlers()
                                .forEach(ch.pipeline()::addLast);
                        if (messageService != null) {
                            ch.pipeline().addLast(new MessageConsumeChannelHandler(mqtt, messageService));
                        }
                    }
                });

        // Bind and start to connect to client
        ChannelFuture future = bootstrap.connect(mqtt.getHost(), mqtt.getPort()).sync();
        if (future.isDone()) {
            log.info("IoT client listening on port [{}]", mqtt.getPort());
        }
        return future.channel();
    }

    @PreDestroy
    public void close() {
        log.info("IoT client closing...");
        group.shutdownGracefully();
    }
}