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