Java tutorial
/* * Copyright (c) 2012-2017 The original author or authorsgetRockQuestions() * ------------------------------------------------------ * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * and Apache License v2.0 which accompanies this distribution. * * The Eclipse Public License is available at * http://www.eclipse.org/legal/epl-v10.html * * The Apache License v2.0 is available at * http://www.opensource.org/licenses/apache2.0.php * * You may elect to redistribute this code under either of these licenses. */ package io.moquette.server.netty; import static io.moquette.BrokerConstants.DISABLED_PORT_BIND; import static io.moquette.BrokerConstants.PORT_PROPERTY_NAME; import static io.moquette.BrokerConstants.SSL_PORT_PROPERTY_NAME; import static io.moquette.BrokerConstants.WEB_SOCKET_PORT_PROPERTY_NAME; import static io.moquette.BrokerConstants.WSS_PORT_PROPERTY_NAME; import java.io.IOException; import java.util.List; import java.util.concurrent.ThreadFactory; import javax.net.ssl.SSLContext; import javax.net.ssl.SSLEngine; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import io.moquette.BrokerConstants; import io.moquette.parser.commons.Constants; import io.moquette.parser.netty.MQTTDecoder; import io.moquette.parser.netty.MQTTEncoder; import io.moquette.server.config.IConfig; import io.moquette.server.netty.metrics.BytesMetrics; import io.moquette.server.netty.metrics.BytesMetricsCollector; import io.moquette.server.netty.metrics.BytesMetricsHandler; import io.moquette.server.netty.metrics.MQTTMessageLogger; import io.moquette.server.netty.metrics.MessageMetrics; import io.moquette.server.netty.metrics.MessageMetricsCollector; import io.moquette.server.netty.metrics.MessageMetricsHandler; import io.moquette.spi.security.ISslContextCreator; import io.netty.bootstrap.ServerBootstrap; import io.netty.buffer.ByteBuf; import io.netty.channel.ChannelFuture; import io.netty.channel.ChannelHandler; import io.netty.channel.ChannelHandlerContext; import io.netty.channel.ChannelInitializer; import io.netty.channel.ChannelOption; import io.netty.channel.ChannelPipeline; import io.netty.channel.EventLoopGroup; import io.netty.channel.nio.NioEventLoopGroup; import io.netty.channel.socket.SocketChannel; import io.netty.channel.socket.nio.NioServerSocketChannel; import io.netty.handler.codec.MessageToMessageDecoder; import io.netty.handler.codec.MessageToMessageEncoder; import io.netty.handler.codec.http.HttpObjectAggregator; import io.netty.handler.codec.http.HttpRequestDecoder; import io.netty.handler.codec.http.HttpResponseEncoder; import io.netty.handler.codec.http.HttpServerCodec; import io.netty.handler.codec.http.websocketx.BinaryWebSocketFrame; import io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler; import io.netty.handler.ssl.SslHandler; import io.netty.handler.timeout.IdleStateHandler; import io.netty.util.concurrent.Future; /** * * @author andrea */ public class NettyAcceptor__ /*implements ServerAcceptor*/ { private static final String MQTT_SUBPROTOCOL_CSV_LIST = "mqtt, mqttv3.1, mqttv3.1.1"; static class WebSocketFrameToByteBufDecoder extends MessageToMessageDecoder<BinaryWebSocketFrame> { @Override protected void decode(ChannelHandlerContext chc, BinaryWebSocketFrame frame, List<Object> out) throws Exception { //convert the frame to a ByteBuf ByteBuf bb = frame.content(); //System.out.println("WebSocketFrameToByteBufDecoder decode - " + ByteBufUtil.hexDump(bb)); bb.retain(); out.add(bb); } } static class ByteBufToWebSocketFrameEncoder extends MessageToMessageEncoder<ByteBuf> { @Override protected void encode(ChannelHandlerContext chc, ByteBuf bb, List<Object> out) throws Exception { //convert the ByteBuf to a WebSocketFrame BinaryWebSocketFrame result = new BinaryWebSocketFrame(); //System.out.println("ByteBufToWebSocketFrameEncoder encode - " + ByteBufUtil.hexDump(bb)); result.content().writeBytes(bb); out.add(result); } } abstract class PipelineInitializer { abstract void init(ChannelPipeline pipeline) throws Exception; } private static final Logger LOG = LoggerFactory.getLogger(NettyAcceptor__.class); EventLoopGroup m_bossGroup; EventLoopGroup m_workerGroup; BytesMetricsCollector m_bytesMetricsCollector = new BytesMetricsCollector(); MessageMetricsCollector m_metricsCollector = new MessageMetricsCollector(); private void initFactory(String host, int port, final PipelineInitializer pipeliner) { ServerBootstrap b = new ServerBootstrap(); b.group(m_bossGroup, m_workerGroup).channel(NioServerSocketChannel.class) .childHandler(new ChannelInitializer<SocketChannel>() { @Override public void initChannel(SocketChannel ch) throws Exception { ChannelPipeline pipeline = ch.pipeline(); try { pipeliner.init(pipeline); } catch (Throwable th) { LOG.error("Severe error during pipeline creation", th); throw th; } } }).option(ChannelOption.SO_BACKLOG, 128).option(ChannelOption.SO_REUSEADDR, true) .option(ChannelOption.TCP_NODELAY, true).childOption(ChannelOption.SO_KEEPALIVE, true); try { // Bind and start to accept incoming connections. ChannelFuture f = b.bind(host, port); LOG.info("Server binded host: {}, port: {}", host, port); f.sync(); } catch (InterruptedException ex) { LOG.error(null, ex); } } private void initializePlainTCPTransport(final NettyMQTTHandler__ handler, IConfig props) throws IOException { final MoquetteIdleTimeoutHandler timeoutHandler = new MoquetteIdleTimeoutHandler(); String host = props.getProperty(BrokerConstants.HOST_PROPERTY_NAME); String tcpPortProp = props.getProperty(PORT_PROPERTY_NAME, DISABLED_PORT_BIND); if (DISABLED_PORT_BIND.equals(tcpPortProp)) { LOG.info("tcp MQTT is disabled because the value for the property with key {}", BrokerConstants.PORT_PROPERTY_NAME); return; } int port = Integer.parseInt(tcpPortProp); initFactory(host, port, new PipelineInitializer() { @Override void init(ChannelPipeline pipeline) { pipeline.addFirst("idleStateHandler", new IdleStateHandler(0, 0, Constants.DEFAULT_CONNECT_TIMEOUT)); pipeline.addAfter("idleStateHandler", "idleEventHandler", timeoutHandler); pipeline.addFirst("bytemetrics", new BytesMetricsHandler(m_bytesMetricsCollector)); pipeline.addLast("decoder", new MQTTDecoder()); pipeline.addLast("encoder", new MQTTEncoder()); pipeline.addLast("metrics", new MessageMetricsHandler(m_metricsCollector)); pipeline.addLast("messageLogger", new MQTTMessageLogger()); pipeline.addLast("handler", handler); } }); } private void initializeWebSocketTransport(final NettyMQTTHandler__ handler, IConfig props) throws IOException { String webSocketPortProp = props.getProperty(WEB_SOCKET_PORT_PROPERTY_NAME, DISABLED_PORT_BIND); if (DISABLED_PORT_BIND.equals(webSocketPortProp)) { //Do nothing no WebSocket configured LOG.info("WebSocket is disabled"); return; } int port = Integer.parseInt(webSocketPortProp); final MoquetteIdleTimeoutHandler timeoutHandler = new MoquetteIdleTimeoutHandler(); String host = props.getProperty(BrokerConstants.HOST_PROPERTY_NAME); initFactory(host, port, new PipelineInitializer() { @Override void init(ChannelPipeline pipeline) { pipeline.addLast(new HttpServerCodec()); pipeline.addLast("aggregator", new HttpObjectAggregator(65536)); pipeline.addLast("webSocketHandler", new WebSocketServerProtocolHandler("/mqtt", MQTT_SUBPROTOCOL_CSV_LIST)); pipeline.addLast("ws2bytebufDecoder", new WebSocketFrameToByteBufDecoder()); pipeline.addLast("bytebuf2wsEncoder", new ByteBufToWebSocketFrameEncoder()); pipeline.addFirst("idleStateHandler", new IdleStateHandler(0, 0, Constants.DEFAULT_CONNECT_TIMEOUT)); pipeline.addAfter("idleStateHandler", "idleEventHandler", timeoutHandler); pipeline.addFirst("bytemetrics", new BytesMetricsHandler(m_bytesMetricsCollector)); pipeline.addLast("decoder", new MQTTDecoder()); pipeline.addLast("encoder", new MQTTEncoder()); pipeline.addLast("metrics", new MessageMetricsHandler(m_metricsCollector)); pipeline.addLast("messageLogger", new MQTTMessageLogger()); pipeline.addLast("handler", handler); } }); } private void initializeSSLTCPTransport(final NettyMQTTHandler__ handler, IConfig props, final SSLContext sslContext) throws IOException { String sslPortProp = props.getProperty(SSL_PORT_PROPERTY_NAME, DISABLED_PORT_BIND); if (DISABLED_PORT_BIND.equals(sslPortProp)) { //Do nothing no SSL configured LOG.info("SSL MQTT is disabled because there is no value in properties for key {}", BrokerConstants.SSL_PORT_PROPERTY_NAME); return; } int sslPort = Integer.parseInt(sslPortProp); LOG.info("Starting SSL on port {}", sslPort); final MoquetteIdleTimeoutHandler timeoutHandler = new MoquetteIdleTimeoutHandler(); String host = props.getProperty(BrokerConstants.HOST_PROPERTY_NAME); String sNeedsClientAuth = props.getProperty(BrokerConstants.NEED_CLIENT_AUTH, "false"); final boolean needsClientAuth = Boolean.valueOf(sNeedsClientAuth); initFactory(host, sslPort, new PipelineInitializer() { @Override void init(ChannelPipeline pipeline) throws Exception { pipeline.addLast("ssl", createSslHandler(sslContext, needsClientAuth)); pipeline.addFirst("idleStateHandler", new IdleStateHandler(0, 0, Constants.DEFAULT_CONNECT_TIMEOUT)); pipeline.addAfter("idleStateHandler", "idleEventHandler", timeoutHandler); //pipeline.addLast("logger", new LoggingHandler("Netty", LogLevel.ERROR)); pipeline.addFirst("bytemetrics", new BytesMetricsHandler(m_bytesMetricsCollector)); pipeline.addLast("decoder", new MQTTDecoder()); pipeline.addLast("encoder", new MQTTEncoder()); pipeline.addLast("metrics", new MessageMetricsHandler(m_metricsCollector)); pipeline.addLast("messageLogger", new MQTTMessageLogger()); pipeline.addLast("handler", handler); } }); } private void initializeWSSTransport(final NettyMQTTHandler__ handler, IConfig props, final SSLContext sslContext) throws IOException { String sslPortProp = props.getProperty(WSS_PORT_PROPERTY_NAME, DISABLED_PORT_BIND); if (DISABLED_PORT_BIND.equals(sslPortProp)) { //Do nothing no SSL configured LOG.info("SSL websocket is disabled because there is no value in properties for key {}", BrokerConstants.WSS_PORT_PROPERTY_NAME); return; } int sslPort = Integer.parseInt(sslPortProp); final MoquetteIdleTimeoutHandler timeoutHandler = new MoquetteIdleTimeoutHandler(); String host = props.getProperty(BrokerConstants.HOST_PROPERTY_NAME); String sNeedsClientAuth = props.getProperty(BrokerConstants.NEED_CLIENT_AUTH, "false"); final boolean needsClientAuth = Boolean.valueOf(sNeedsClientAuth); initFactory(host, sslPort, new PipelineInitializer() { @Override void init(ChannelPipeline pipeline) throws Exception { pipeline.addLast("ssl", createSslHandler(sslContext, needsClientAuth)); pipeline.addLast("httpEncoder", new HttpResponseEncoder()); pipeline.addLast("httpDecoder", new HttpRequestDecoder()); pipeline.addLast("aggregator", new HttpObjectAggregator(65536)); pipeline.addLast("webSocketHandler", new WebSocketServerProtocolHandler("/mqtt", MQTT_SUBPROTOCOL_CSV_LIST)); pipeline.addLast("ws2bytebufDecoder", new WebSocketFrameToByteBufDecoder()); pipeline.addLast("bytebuf2wsEncoder", new ByteBufToWebSocketFrameEncoder()); pipeline.addFirst("idleStateHandler", new IdleStateHandler(0, 0, Constants.DEFAULT_CONNECT_TIMEOUT)); pipeline.addAfter("idleStateHandler", "idleEventHandler", timeoutHandler); pipeline.addFirst("bytemetrics", new BytesMetricsHandler(m_bytesMetricsCollector)); pipeline.addLast("decoder", new MQTTDecoder()); pipeline.addLast("encoder", new MQTTEncoder()); pipeline.addLast("metrics", new MessageMetricsHandler(m_metricsCollector)); pipeline.addLast("messageLogger", new MQTTMessageLogger()); pipeline.addLast("handler", handler); } }); } @SuppressWarnings("rawtypes") public void close() { if (m_workerGroup == null) { throw new IllegalStateException("Invoked close on an Acceptor that wasn't initialized"); } if (m_bossGroup == null) { throw new IllegalStateException("Invoked close on an Acceptor that wasn't initialized"); } Future workerWaiter = m_workerGroup.shutdownGracefully(); Future bossWaiter = m_bossGroup.shutdownGracefully(); try { workerWaiter.await(100); } catch (InterruptedException iex) { throw new IllegalStateException(iex); } try { bossWaiter.await(100); } catch (InterruptedException iex) { throw new IllegalStateException(iex); } MessageMetrics metrics = m_metricsCollector.computeMetrics(); LOG.info("Msg read: {}, msg wrote: {}", metrics.messagesRead(), metrics.messagesWrote()); BytesMetrics bytesMetrics = m_bytesMetricsCollector.computeMetrics(); LOG.info(String.format("Bytes read: %d, bytes wrote: %d", bytesMetrics.readBytes(), bytesMetrics.wroteBytes())); } private ChannelHandler createSslHandler(SSLContext sslContext, boolean needsClientAuth) { SSLEngine sslEngine = sslContext.createSSLEngine(); sslEngine.setUseClientMode(false); if (needsClientAuth) { sslEngine.setNeedClientAuth(true); } return new SslHandler(sslEngine); } public void initialize(io.moquette.spi.impl.ProtocolProcessor__ processor, IConfig props, ISslContextCreator sslCtxCreator) throws IOException { m_bossGroup = new NioEventLoopGroup(1, new ThreadFactory() { int n = 0; @Override public Thread newThread(Runnable r) { Thread t = new Thread(r, "ticker-mqtt-accept-" + (n++)); return t; } }); m_workerGroup = new NioEventLoopGroup(2, new ThreadFactory() { int n = 0; @Override public Thread newThread(Runnable r) { Thread t = new Thread(r, "ticker-mqtt-ioworker-" + (n++)); return t; } }); final NettyMQTTHandler__ handler = new NettyMQTTHandler__(processor); initializePlainTCPTransport(handler, props); initializeWebSocketTransport(handler, props); String sslTcpPortProp = props.getProperty(BrokerConstants.SSL_PORT_PROPERTY_NAME); String wssPortProp = props.getProperty(BrokerConstants.WSS_PORT_PROPERTY_NAME); if (sslTcpPortProp != null || wssPortProp != null) { SSLContext sslContext = sslCtxCreator.initSSLContext(); if (sslContext == null) { LOG.error("Can't initialize SSLHandler layer! Exiting, check your configuration of jks"); return; } initializeSSLTCPTransport(handler, props, sslContext); initializeWSSTransport(handler, props, sslContext); } } }