opendaylight/netconf/netconf-util/src/main/java/org/opendaylight/controller/netconf/util/AbstractChannelInitializer.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.util;
  10
  11 import javax.net.ssl.SSLContext;
  12 import javax.net.ssl.SSLEngine;
  13
  14 import org.opendaylight.controller.netconf.api.NetconfMessage;
  15 import org.opendaylight.controller.netconf.api.NetconfSession;
  16 import org.opendaylight.controller.netconf.util.handler.FramingMechanismHandlerFactory;
  17 import org.opendaylight.controller.netconf.util.handler.NetconfMessageAggregator;
  18 import org.opendaylight.controller.netconf.util.messages.FramingMechanism;
  19 import org.opendaylight.controller.netconf.util.messages.NetconfMessageFactory;
  20 import org.opendaylight.protocol.framework.ProtocolHandlerFactory;
  21 import org.opendaylight.protocol.framework.ProtocolMessageDecoder;
  22 import org.opendaylight.protocol.framework.ProtocolMessageEncoder;
  23
  24 import com.google.common.base.Optional;
  25
  26 import io.netty.channel.ChannelHandler;
  27 import io.netty.channel.socket.SocketChannel;
  28 import io.netty.handler.ssl.SslHandler;
  29 import io.netty.util.concurrent.Promise;
  30
  31 public abstract class AbstractChannelInitializer {
  32
  33     private final Optional<SSLContext> maybeContext;
  34     private final NetconfHandlerFactory handlerFactory;
  35
  36     public AbstractChannelInitializer(Optional<SSLContext> maybeContext) {
  37         this.maybeContext = maybeContext;
  38         this.handlerFactory = new NetconfHandlerFactory(new NetconfMessageFactory());
  39     }
  40
  41     public void initialize(SocketChannel ch, Promise<? extends NetconfSession> promise) {
  42         if (maybeContext.isPresent()) {
  43             initSsl(ch);
  44         }
  45
  46         ch.pipeline().addLast("aggregator", new NetconfMessageAggregator(FramingMechanism.EOM));
  47         ch.pipeline().addLast(handlerFactory.getDecoders());
  48         initializeAfterDecoder(ch, promise);
  49         ch.pipeline().addLast("frameEncoder", FramingMechanismHandlerFactory.createHandler(FramingMechanism.EOM));
  50         ch.pipeline().addLast(handlerFactory.getEncoders());
  51     }
  52
  53     protected abstract void initializeAfterDecoder(SocketChannel ch, Promise<? extends NetconfSession> promise);
  54
  55     private void initSsl(SocketChannel ch) {
  56         SSLEngine sslEngine = maybeContext.get().createSSLEngine();
  57         initSslEngine(sslEngine);
  58         final SslHandler handler = new SslHandler(sslEngine);
  59         ch.pipeline().addLast("ssl", handler);
  60     }
  61
  62     protected abstract void initSslEngine(SSLEngine sslEngine);
  63
  64     private static final class NetconfHandlerFactory extends ProtocolHandlerFactory<NetconfMessage> {
  65
  66         public NetconfHandlerFactory(final NetconfMessageFactory msgFactory) {
  67             super(msgFactory);
  68         }
  69
  70         @Override
  71         public ChannelHandler[] getEncoders() {
  72             return new ChannelHandler[] { new ProtocolMessageEncoder(this.msgFactory) };
  73         }
  74
  75         @Override
  76         public ChannelHandler[] getDecoders() {
  77             return new ChannelHandler[] { new ProtocolMessageDecoder(this.msgFactory) };
  78         }
  79     }
  80 }