Bump versions by x.y.(z+1)
[bgpcep.git] / bgp / rib-impl / src / main / java / org / opendaylight / protocol / bgp / rib / impl / BGPDispatcherImpl.java
index 492e75808644137592f9ceaeef56ac810caacf00..5160d566b496ac3836ba4a0951f5f06ecd5a118f 100644 (file)
  */
 package org.opendaylight.protocol.bgp.rib.impl;
 
-import java.io.Closeable;
-import java.io.IOException;
-
-import org.opendaylight.protocol.bgp.parser.BGPMessageParser;
-import org.opendaylight.protocol.bgp.parser.BGPSession;
-import org.opendaylight.protocol.bgp.rib.impl.spi.BGPConnection;
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Optional;
+import com.google.common.base.Preconditions;
+import io.netty.bootstrap.Bootstrap;
+import io.netty.bootstrap.ServerBootstrap;
+import io.netty.buffer.PooledByteBufAllocator;
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.ChannelHandler;
+import io.netty.channel.ChannelInitializer;
+import io.netty.channel.ChannelOption;
+import io.netty.channel.EventLoopGroup;
+import io.netty.channel.epoll.Epoll;
+import io.netty.channel.epoll.EpollChannelOption;
+import io.netty.channel.epoll.EpollEventLoopGroup;
+import io.netty.channel.epoll.EpollMode;
+import io.netty.channel.epoll.EpollServerSocketChannel;
+import io.netty.channel.epoll.EpollSocketChannel;
+import io.netty.channel.socket.SocketChannel;
+import io.netty.channel.socket.nio.NioServerSocketChannel;
+import io.netty.channel.socket.nio.NioSocketChannel;
+import io.netty.util.concurrent.DefaultPromise;
+import io.netty.util.concurrent.Future;
+import io.netty.util.concurrent.GlobalEventExecutor;
+import io.netty.util.concurrent.Promise;
+import java.net.InetSocketAddress;
+import java.util.concurrent.TimeUnit;
+import org.opendaylight.protocol.bgp.parser.spi.MessageRegistry;
+import org.opendaylight.protocol.bgp.rib.impl.protocol.BGPProtocolSessionPromise;
+import org.opendaylight.protocol.bgp.rib.impl.protocol.BGPReconnectPromise;
 import org.opendaylight.protocol.bgp.rib.impl.spi.BGPDispatcher;
-
-import org.opendaylight.protocol.framework.Dispatcher;
+import org.opendaylight.protocol.bgp.rib.impl.spi.BGPPeerRegistry;
+import org.opendaylight.protocol.bgp.rib.impl.spi.ChannelPipelineInitializer;
+import org.opendaylight.protocol.bgp.rib.spi.BGPSession;
+import org.opendaylight.protocol.bgp.rib.spi.BGPSessionNegotiatorFactory;
+import org.opendaylight.protocol.concepts.KeyMapping;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * Implementation of BGPDispatcher.
  */
-public final class BGPDispatcherImpl implements BGPDispatcher, Closeable {
+public class BGPDispatcherImpl implements BGPDispatcher, AutoCloseable {
+    private static final Logger LOG = LoggerFactory.getLogger(BGPDispatcherImpl.class);
+    private static final int SOCKET_BACKLOG_SIZE = 128;
+    private static final int HIGH_WATER_MARK = 256 * 1024;
+    private static final int LOW_WATER_MARK = 128 * 1024;
+    private static final long TIMEOUT = 10;
+
+    private final BGPHandlerFactory handlerFactory;
+    private final EventLoopGroup bossGroup;
+    private final EventLoopGroup workerGroup;
+
+    public BGPDispatcherImpl(final MessageRegistry messageRegistry, final EventLoopGroup bossGroup, final EventLoopGroup workerGroup) {
+        if (Epoll.isAvailable()) {
+            this.bossGroup = new EpollEventLoopGroup();
+            this.workerGroup = new EpollEventLoopGroup();
+        } else {
+            this.bossGroup = Preconditions.checkNotNull(bossGroup);
+            this.workerGroup = Preconditions.checkNotNull(workerGroup);
+        }
+        this.handlerFactory = new BGPHandlerFactory(messageRegistry);
+    }
+
+    @Override
+    public synchronized Future<BGPSessionImpl> createClient(final InetSocketAddress remoteAddress, final BGPPeerRegistry listener, final int retryTimer) {
+        return createClient(remoteAddress, listener, retryTimer, createClientBootStrap(Optional.absent(), false));
+    }
+
+    private synchronized Future<BGPSessionImpl> createClient(final InetSocketAddress remoteAddress, final BGPPeerRegistry listener, final int retryTimer,
+            final Bootstrap clientBootStrap) {
+        final BGPClientSessionNegotiatorFactory snf = new BGPClientSessionNegotiatorFactory(listener);
+        final ChannelPipelineInitializer initializer = BGPChannel.createChannelPipelineInitializer(this.handlerFactory, snf);
+
+        final BGPProtocolSessionPromise sessionPromise = new BGPProtocolSessionPromise(remoteAddress, retryTimer, clientBootStrap, listener);
+        clientBootStrap.handler(BGPChannel.createClientChannelHandler(initializer, sessionPromise));
+        sessionPromise.connect();
+        LOG.debug("Client created.");
+        return sessionPromise;
+    }
+
+    @VisibleForTesting
+    public synchronized Future<BGPSessionImpl> createClient(final InetSocketAddress localAddress, final InetSocketAddress remoteAddress,
+            final BGPPeerRegistry strictBGPPeerRegistry, final int retryTimer, final boolean reuseAddress) {
+        final Bootstrap clientBootStrap = createClientBootStrap(Optional.absent(), reuseAddress);
+        clientBootStrap.localAddress(localAddress);
+        return createClient(remoteAddress, strictBGPPeerRegistry, retryTimer, clientBootStrap);
+    }
+
+    private synchronized Bootstrap createClientBootStrap(final Optional<KeyMapping> keys, final boolean reuseAddress) {
+        final Bootstrap bootstrap = new Bootstrap();
+        if (Epoll.isAvailable()) {
+            bootstrap.channel(EpollSocketChannel.class);
+            bootstrap.option(EpollChannelOption.EPOLL_MODE, EpollMode.LEVEL_TRIGGERED);
+        } else {
+            bootstrap.channel(NioSocketChannel.class);
+        }
+        if (keys.isPresent()) {
+            if (Epoll.isAvailable()) {
+                bootstrap.option(EpollChannelOption.TCP_MD5SIG, keys.get());
+            } else {
+                throw new UnsupportedOperationException(Epoll.unavailabilityCause().getCause());
+            }
+        }
+
+        // Make sure we are doing round-robin processing
+        bootstrap.option(ChannelOption.MAX_MESSAGES_PER_READ, 1);
+        bootstrap.option(ChannelOption.SO_KEEPALIVE, Boolean.TRUE);
+        bootstrap.option(ChannelOption.WRITE_BUFFER_HIGH_WATER_MARK, HIGH_WATER_MARK);
+        bootstrap.option(ChannelOption.WRITE_BUFFER_LOW_WATER_MARK, LOW_WATER_MARK);
+        bootstrap.option(ChannelOption.SO_REUSEADDR, reuseAddress);
+
+        if (bootstrap.group() == null) {
+            bootstrap.group(this.workerGroup);
+        }
+
+        return bootstrap;
+    }
+
+    @Override
+    public synchronized void close() throws InterruptedException {
+        if (Epoll.isAvailable()) {
+            LOG.debug("Closing Dispatcher");
+            this.workerGroup.shutdownGracefully(0, TIMEOUT, TimeUnit.SECONDS);
+            this.bossGroup.shutdownGracefully(0, TIMEOUT, TimeUnit.SECONDS);
+        }
+    }
+
+    @Override
+    public synchronized Future<Void> createReconnectingClient(final InetSocketAddress remoteAddress, final BGPPeerRegistry peerRegistry,
+            final int retryTimer, final Optional<KeyMapping> keys) {
+        return createReconnectingClient(remoteAddress, peerRegistry, retryTimer, keys, null, false);
+    }
+
+    @VisibleForTesting
+    protected synchronized Future<Void> createReconnectingClient(final InetSocketAddress remoteAddress, final BGPPeerRegistry peerRegistry,
+        final int retryTimer, final Optional<KeyMapping> keys, final InetSocketAddress localAddress, final boolean reuseAddress) {
+        final BGPClientSessionNegotiatorFactory snf = new BGPClientSessionNegotiatorFactory(peerRegistry);
+        final Bootstrap bootstrap = createClientBootStrap(keys, reuseAddress);
+        bootstrap.localAddress(localAddress);
+        final BGPReconnectPromise reconnectPromise = new BGPReconnectPromise(GlobalEventExecutor.INSTANCE, remoteAddress,
+            retryTimer, bootstrap, peerRegistry, BGPChannel.createChannelPipelineInitializer(this.handlerFactory, snf));
+        reconnectPromise.connect();
+        return reconnectPromise;
+    }
+
+    @Override
+    public synchronized ChannelFuture createServer(final BGPPeerRegistry registry, final InetSocketAddress serverAddress) {
+        final BGPServerSessionNegotiatorFactory snf = new BGPServerSessionNegotiatorFactory(registry);
+        final ChannelPipelineInitializer initializer = BGPChannel.createChannelPipelineInitializer(this.handlerFactory, snf);
+        final ServerBootstrap serverBootstrap = createServerBootstrap(initializer);
+        final ChannelFuture channelFuture = serverBootstrap.bind(serverAddress);
+        LOG.debug("Initiated server {} at {}.", channelFuture, serverAddress);
+        return channelFuture;
+    }
+
+    private synchronized ServerBootstrap createServerBootstrap(final ChannelPipelineInitializer initializer) {
+        final ServerBootstrap serverBootstrap = new ServerBootstrap();
+        if (Epoll.isAvailable()) {
+            serverBootstrap.channel(EpollServerSocketChannel.class);
+            serverBootstrap.childOption(EpollChannelOption.EPOLL_MODE, EpollMode.LEVEL_TRIGGERED);
+        } else {
+            serverBootstrap.channel(NioServerSocketChannel.class);
+        }
+        final ChannelHandler serverChannelHandler = BGPChannel.createServerChannelHandler(initializer);
+        serverBootstrap.childHandler(serverChannelHandler);
+
+        serverBootstrap.option(ChannelOption.SO_BACKLOG, SOCKET_BACKLOG_SIZE);
+        serverBootstrap.childOption(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT);
+        serverBootstrap.childOption(ChannelOption.WRITE_BUFFER_HIGH_WATER_MARK, HIGH_WATER_MARK);
+        serverBootstrap.childOption(ChannelOption.WRITE_BUFFER_LOW_WATER_MARK, LOW_WATER_MARK);
+
+        // Make sure we are doing round-robin processing
+        serverBootstrap.option(ChannelOption.MAX_MESSAGES_PER_READ, 1);
+
+        if (serverBootstrap.group() == null) {
+            serverBootstrap.group(this.bossGroup, this.workerGroup);
+        }
+        return serverBootstrap;
+    }
+
+    private static final class BGPChannel {
+        private static final String NEGOTIATOR = "negotiator";
 
-       private final Dispatcher dispatcher;
+        private BGPChannel() {
 
-       public BGPDispatcherImpl(final Dispatcher dispatcher) throws IOException {
-               this.dispatcher = dispatcher;
-       }
+        }
 
-       @Override
-       public BGPSession createClient(final BGPConnection connection, final BGPMessageParser parser) throws IOException {
-               return (BGPSession) this.dispatcher.createClient(connection, new BGPSessionFactory(parser), BGPInputStream.FACTORY);
-       }
+        static <T extends BGPSessionNegotiatorFactory> ChannelPipelineInitializer
+        createChannelPipelineInitializer(final BGPHandlerFactory hf, final T snf) {
+            return (channel, promise) -> {
+                channel.pipeline().addLast(hf.getDecoders());
+                channel.pipeline().addLast(NEGOTIATOR, snf.getSessionNegotiator(channel, promise));
+                channel.pipeline().addLast(hf.getEncoders());
+            };
+        }
 
-       public Dispatcher getDispatcher() {
-               return this.dispatcher;
-       }
+        static <S extends BGPSession> ChannelHandler createClientChannelHandler(final ChannelPipelineInitializer initializer, final Promise<S> promise) {
+            return new ChannelInitializer<SocketChannel>() {
+                @Override
+                protected void initChannel(final SocketChannel channel) {
+                    initializer.initializeChannel(channel, promise);
+                }
+            };
+        }
 
-       @Override
-       public void close() {
-               // This is only necessary for configuration interaction
-       }
-}
+        static ChannelHandler createServerChannelHandler(final ChannelPipelineInitializer initializer) {
+            return new ChannelInitializer<SocketChannel>() {
+                @Override
+                protected void initChannel(final SocketChannel channel) {
+                    initializer.initializeChannel(channel, new DefaultPromise<BGPSessionImpl>(GlobalEventExecutor.INSTANCE));
+                }
+            };
+        }
+    }
+}
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