opendaylight/netconf/netconf-client/src/main/java/org/opendaylight/controller/netconf/client/NetconfClientDispatcher.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8
   9 package org.opendaylight.controller.netconf.client;
  10
  11 import io.netty.channel.EventLoopGroup;
  12 import io.netty.channel.socket.SocketChannel;
  13 import io.netty.util.HashedWheelTimer;
  14 import io.netty.util.concurrent.Future;
  15 import io.netty.util.concurrent.Promise;
  16
  17 import java.io.Closeable;
  18 import java.net.InetSocketAddress;
  19
  20 import org.opendaylight.controller.netconf.util.AbstractChannelInitializer;
  21 import org.opendaylight.controller.netconf.util.messages.NetconfHelloMessageAdditionalHeader;
  22 import org.opendaylight.protocol.framework.AbstractDispatcher;
  23 import org.opendaylight.protocol.framework.ReconnectStrategy;
  24 import org.opendaylight.protocol.framework.ReconnectStrategyFactory;
  25 import org.opendaylight.protocol.framework.SessionListenerFactory;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 import com.google.common.base.Optional;
  30
  31 public class NetconfClientDispatcher extends AbstractDispatcher<NetconfClientSession, NetconfClientSessionListener> implements Closeable {
  32
  33     private static final Logger logger = LoggerFactory.getLogger(NetconfClientDispatcher.class);
  34
  35     private final NetconfClientSessionNegotiatorFactory negotiatorFactory;
  36     private final HashedWheelTimer timer;
  37
  38     public NetconfClientDispatcher(EventLoopGroup bossGroup, EventLoopGroup workerGroup,
  39             long clientConnectionTimeoutMillis) {
  40         super(bossGroup, workerGroup);
  41         timer = new HashedWheelTimer();
  42         this.negotiatorFactory = new NetconfClientSessionNegotiatorFactory(timer,
  43                 Optional.<NetconfHelloMessageAdditionalHeader> absent(), clientConnectionTimeoutMillis);
  44     }
  45
  46     public NetconfClientDispatcher(EventLoopGroup bossGroup, EventLoopGroup workerGroup,
  47             NetconfHelloMessageAdditionalHeader additionalHeader, long connectionTimeoutMillis) {
  48         super(bossGroup, workerGroup);
  49         timer = new HashedWheelTimer();
  50         this.negotiatorFactory = new NetconfClientSessionNegotiatorFactory(timer, Optional.of(additionalHeader),
  51                 connectionTimeoutMillis);
  52     }
  53
  54     public Future<NetconfClientSession> createClient(InetSocketAddress address,
  55             final NetconfClientSessionListener sessionListener, ReconnectStrategy strat) {
  56
  57         return super.createClient(address, strat, new PipelineInitializer<NetconfClientSession>() {
  58
  59             @Override
  60             public void initializeChannel(final SocketChannel ch, final Promise<NetconfClientSession> promise) {
  61                 initialize(ch, promise);
  62             }
  63
  64             private void initialize(SocketChannel ch, Promise<NetconfClientSession> promise) {
  65                 new ClientChannelInitializer(negotiatorFactory, sessionListener).initialize(ch, promise);
  66             }
  67         });
  68     }
  69
  70     public Future<Void> createReconnectingClient(final InetSocketAddress address,
  71             final NetconfClientSessionListener listener,
  72             final ReconnectStrategyFactory connectStrategyFactory, final ReconnectStrategy reestablishStrategy) {
  73         final ClientChannelInitializer init = new ClientChannelInitializer(negotiatorFactory, listener);
  74
  75         return super.createReconnectingClient(address, connectStrategyFactory, reestablishStrategy,
  76                 new PipelineInitializer<NetconfClientSession>() {
  77             @Override
  78             public void initializeChannel(final SocketChannel ch, final Promise<NetconfClientSession> promise) {
  79                 init.initialize(ch, promise);
  80             }
  81         });
  82     }
  83
  84     private static class ClientChannelInitializer extends AbstractChannelInitializer<NetconfClientSession> {
  85
  86         private final NetconfClientSessionNegotiatorFactory negotiatorFactory;
  87         private final NetconfClientSessionListener sessionListener;
  88
  89         private ClientChannelInitializer(NetconfClientSessionNegotiatorFactory negotiatorFactory,
  90                 NetconfClientSessionListener sessionListener) {
  91             this.negotiatorFactory = negotiatorFactory;
  92             this.sessionListener = sessionListener;
  93         }
  94
  95         @Override
  96         public void initialize(SocketChannel ch, Promise<NetconfClientSession> promise) {
  97                 super.initialize(ch,promise);
  98         }
  99
 100         @Override
 101         protected void initializeSessionNegotiator(SocketChannel ch, Promise<NetconfClientSession> promise) {
 102             ch.pipeline().addAfter(NETCONF_MESSAGE_DECODER,  AbstractChannelInitializer.NETCONF_SESSION_NEGOTIATOR,
 103                     negotiatorFactory.getSessionNegotiator(
 104                             new SessionListenerFactory<NetconfClientSessionListener>() {
 105                                 @Override
 106                                 public NetconfClientSessionListener getSessionListener() {
 107                                     return sessionListener;
 108                                 }
 109                             }, ch, promise));
 110         }
 111     }
 112
 113     @Override
 114     public void close() {
 115         try {
 116             timer.stop();
 117         } catch (Exception e) {
 118             logger.debug("Ignoring exception while closing {}", timer, e);
 119         }
 120     }
 121 }