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 com.google.common.base.Preconditions;
  13 import io.netty.channel.EventLoopGroup;
  14 import io.netty.channel.socket.SocketChannel;
  15 import io.netty.util.HashedWheelTimer;
  16 import io.netty.util.concurrent.Future;
  17 import io.netty.util.concurrent.Promise;
  18 import org.opendaylight.controller.netconf.api.NetconfMessage;
  19 import org.opendaylight.controller.netconf.api.NetconfSession;
  20 import org.opendaylight.controller.netconf.api.NetconfTerminationReason;
  21 import org.opendaylight.controller.netconf.util.AbstractSslChannelInitializer;
  22 import org.opendaylight.protocol.framework.AbstractDispatcher;
  23 import org.opendaylight.protocol.framework.ReconnectStrategy;
  24 import org.opendaylight.protocol.framework.SessionListener;
  25 import org.opendaylight.protocol.framework.SessionListenerFactory;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 import javax.net.ssl.SSLContext;
  30 import javax.net.ssl.SSLEngine;
  31 import java.io.Closeable;
  32 import java.net.InetSocketAddress;
  33
  34 public class NetconfClientDispatcher extends AbstractDispatcher<NetconfClientSession, NetconfClientSessionListener> implements Closeable {
  35
  36     private static final Logger logger = LoggerFactory.getLogger(NetconfClient.class);
  37
  38     private final Optional<SSLContext> maybeContext;
  39     private final NetconfClientSessionNegotiatorFactory negotatorFactory;
  40     private final HashedWheelTimer timer;
  41
  42     public NetconfClientDispatcher(final Optional<SSLContext> maybeContext, EventLoopGroup bossGroup, EventLoopGroup workerGroup) {
  43         super(bossGroup, workerGroup);
  44         this.maybeContext = Preconditions.checkNotNull(maybeContext);
  45         timer = new HashedWheelTimer();
  46         this.negotatorFactory = new NetconfClientSessionNegotiatorFactory(timer);
  47     }
  48
  49     public Future<NetconfClientSession> createClient(InetSocketAddress address,
  50             final NetconfClientSessionListener sessionListener, ReconnectStrategy strat) {
  51
  52         return super.createClient(address, strat, new PipelineInitializer<NetconfClientSession>() {
  53
  54             @Override
  55             public void initializeChannel(final SocketChannel ch, final Promise<NetconfClientSession> promise) {
  56                 initialize(ch, promise);
  57             }
  58
  59             private void initialize(SocketChannel ch, Promise<NetconfClientSession> promise) {
  60                 new ClientSslChannelInitializer(maybeContext, negotatorFactory, sessionListener).initialize(ch, promise);
  61             }
  62         });
  63     }
  64
  65     private static class ClientSslChannelInitializer extends AbstractSslChannelInitializer {
  66
  67         private final NetconfClientSessionNegotiatorFactory negotiatorFactory;
  68         private final NetconfClientSessionListener sessionListener;
  69
  70         private ClientSslChannelInitializer(Optional<SSLContext> maybeContext,
  71                                             NetconfClientSessionNegotiatorFactory negotiatorFactory, NetconfClientSessionListener sessionListener) {
  72             super(maybeContext);
  73             this.negotiatorFactory = negotiatorFactory;
  74             this.sessionListener = sessionListener;
  75         }
  76
  77         @Override
  78         protected void initializeAfterDecoder(SocketChannel ch, Promise<? extends NetconfSession> promise) {
  79             ch.pipeline().addLast("negotiator", negotiatorFactory.getSessionNegotiator(new SessionListenerFactory() {
  80                 @Override
  81                 public SessionListener<NetconfMessage, NetconfClientSession, NetconfTerminationReason> getSessionListener() {
  82                     return sessionListener;
  83                 }
  84             }, ch, promise));
  85         }
  86
  87         @Override
  88         protected void initSslEngine(SSLEngine sslEngine) {
  89             sslEngine.setUseClientMode(true);
  90         }
  91     }
  92
  93     @Override
  94     public void close() {
  95         try {
  96             timer.stop();
  97         } catch (Exception e) {
  98             logger.debug("Ignoring exception while closing {}", timer, e);
  99         }
 100     }
 101 }