2 * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.netconf.nettyutil;
10 import static java.util.Objects.requireNonNull;
12 import io.netty.bootstrap.Bootstrap;
13 import io.netty.bootstrap.ServerBootstrap;
14 import io.netty.buffer.PooledByteBufAllocator;
15 import io.netty.channel.Channel;
16 import io.netty.channel.ChannelFuture;
17 import io.netty.channel.ChannelInitializer;
18 import io.netty.channel.ChannelOption;
19 import io.netty.channel.EventLoopGroup;
20 import io.netty.channel.ServerChannel;
21 import io.netty.channel.local.LocalServerChannel;
22 import io.netty.channel.socket.SocketChannel;
23 import io.netty.channel.socket.nio.NioServerSocketChannel;
24 import io.netty.channel.socket.nio.NioSocketChannel;
25 import io.netty.util.concurrent.DefaultPromise;
26 import io.netty.util.concurrent.EventExecutor;
27 import io.netty.util.concurrent.Future;
28 import io.netty.util.concurrent.GlobalEventExecutor;
29 import io.netty.util.concurrent.Promise;
30 import java.net.InetSocketAddress;
31 import java.net.SocketAddress;
32 import org.opendaylight.netconf.api.NetconfSession;
33 import org.opendaylight.netconf.api.NetconfSessionListener;
34 import org.slf4j.Logger;
35 import org.slf4j.LoggerFactory;
38 * Dispatcher class for creating servers and clients. The idea is to first create servers and clients and the run the
39 * start method that will handle sockets in different thread.
41 @Deprecated(forRemoval = true)
42 public abstract class AbstractNetconfDispatcher<S extends NetconfSession, L extends NetconfSessionListener<? super S>> {
43 protected interface ChannelPipelineInitializer<C extends Channel, S extends NetconfSession> {
45 * Initializes channel by specifying the handlers in its pipeline. Handlers are protocol specific, therefore
46 * this method needs to be implemented in protocol specific Dispatchers.
48 * @param channel whose pipeline should be defined, also to be passed to {@link NetconfSessionNegotiatorFactory}
49 * @param promise to be passed to {@link NetconfSessionNegotiatorFactory}
51 void initializeChannel(C channel, Promise<S> promise);
54 protected interface PipelineInitializer<S extends NetconfSession>
55 extends ChannelPipelineInitializer<SocketChannel, S> {
59 private static final Logger LOG = LoggerFactory.getLogger(AbstractNetconfDispatcher.class);
61 private final EventLoopGroup bossGroup;
63 private final EventLoopGroup workerGroup;
65 private final EventExecutor executor;
67 protected AbstractNetconfDispatcher(final EventLoopGroup bossGroup, final EventLoopGroup workerGroup) {
68 this(GlobalEventExecutor.INSTANCE, bossGroup, workerGroup);
71 protected AbstractNetconfDispatcher(final EventExecutor executor, final EventLoopGroup bossGroup,
72 final EventLoopGroup workerGroup) {
73 this.bossGroup = requireNonNull(bossGroup);
74 this.workerGroup = requireNonNull(workerGroup);
75 this.executor = requireNonNull(executor);
80 * Creates server. Each server needs factories to pass their instances to client sessions.
82 * @param address address to which the server should be bound
83 * @param initializer instance of PipelineInitializer used to initialize the channel pipeline
85 * @return ChannelFuture representing the binding process
87 protected ChannelFuture createServer(final InetSocketAddress address, final PipelineInitializer<S> initializer) {
88 return createServer(address, NioServerSocketChannel.class, initializer);
92 * Creates server. Each server needs factories to pass their instances to client sessions.
94 * @param address address to which the server should be bound
95 * @param channelClass The {@link Class} which is used to create {@link Channel} instances from.
96 * @param initializer instance of PipelineInitializer used to initialize the channel pipeline
98 * @return ChannelFuture representing the binding process
100 protected <C extends Channel> ChannelFuture createServer(final SocketAddress address,
101 final Class<? extends ServerChannel> channelClass, final ChannelPipelineInitializer<C, S> initializer) {
102 final ServerBootstrap b = new ServerBootstrap();
103 b.childHandler(new ChannelInitializer<C>() {
106 protected void initChannel(final C ch) {
107 initializer.initializeChannel(ch, new DefaultPromise<>(executor));
111 b.option(ChannelOption.SO_BACKLOG, 128);
112 if (LocalServerChannel.class.equals(channelClass) == false) {
113 // makes no sense for LocalServer and produces warning
114 b.childOption(ChannelOption.SO_KEEPALIVE, true);
115 b.childOption(ChannelOption.TCP_NODELAY , true);
117 b.childOption(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT);
119 if (b.group() == null) {
120 b.group(bossGroup, workerGroup);
123 b.channel(channelClass);
124 } catch (final IllegalStateException e) {
125 // FIXME: if this is ok, document why
126 LOG.trace("Not overriding channelFactory on bootstrap {}", b, e);
129 // Bind and start to accept incoming connections.
130 final ChannelFuture f = b.bind(address);
131 LOG.debug("Initiated server {} at {}.", f, address);
138 * @param address remote address
139 * @param initializer Channel initializer
141 * @return Future representing the connection process. Its result represents the combined success of TCP connection
142 * as well as session negotiation.
144 protected Future<S> createClient(final InetSocketAddress address, final PipelineInitializer<S> initializer) {
145 final Bootstrap b = new Bootstrap();
146 final NetconfSessionPromise<S> p = new NetconfSessionPromise<>(executor, address, b);
147 b.option(ChannelOption.SO_KEEPALIVE, true).handler(
148 new ChannelInitializer<SocketChannel>() {
150 protected void initChannel(final SocketChannel ch) {
151 initializer.initializeChannel(ch, p);
156 setChannelFactory(b);
159 LOG.debug("Client created.");
164 * Create a client but use a pre-configured bootstrap.
165 * This method however replaces the ChannelInitializer in the bootstrap. All other configuration is preserved.
167 * @param address remote address
169 protected Future<S> createClient(final InetSocketAddress address, final Bootstrap bootstrap,
170 final PipelineInitializer<S> initializer) {
171 final NetconfSessionPromise<S> p = new NetconfSessionPromise<>(executor, address, bootstrap);
174 new ChannelInitializer<SocketChannel>() {
176 protected void initChannel(final SocketChannel ch) {
177 initializer.initializeChannel(ch, p);
182 LOG.debug("Client created.");
186 private static void setChannelFactory(final Bootstrap bootstrap) {
187 // There is no way to detect if this was already set by
188 // customizeBootstrap()
190 bootstrap.channel(NioSocketChannel.class);
191 } catch (final IllegalStateException e) {
192 LOG.trace("Not overriding channelFactory on bootstrap {}", bootstrap, e);
196 private void setWorkerGroup(final Bootstrap bootstrap) {
197 if (bootstrap.group() == null) {
198 bootstrap.group(workerGroup);