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