+/*
+ * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.controller.netconf.util;
+
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.SSLEngine;
+
+import org.opendaylight.controller.netconf.api.NetconfMessage;
+import org.opendaylight.controller.netconf.api.NetconfSession;
+import org.opendaylight.controller.netconf.util.messages.NetconfMessageFactory;
+import org.opendaylight.protocol.framework.ProtocolHandlerFactory;
+import org.opendaylight.protocol.framework.ProtocolMessageDecoder;
+import org.opendaylight.protocol.framework.ProtocolMessageEncoder;
+
+import com.google.common.base.Optional;
+
+import io.netty.channel.ChannelHandler;
+import io.netty.channel.socket.SocketChannel;
+import io.netty.handler.ssl.SslHandler;
+import io.netty.util.concurrent.Promise;
+
+public abstract class AbstractChannelInitializer {
+
+ private final Optional<SSLContext> maybeContext;
+ private final NetconfHandlerFactory handlerFactory;
+
+ public AbstractChannelInitializer(Optional<SSLContext> maybeContext) {
+ this.maybeContext = maybeContext;
+ this.handlerFactory = new NetconfHandlerFactory(new NetconfMessageFactory());
+ }
+
+ public void initialize(SocketChannel ch, Promise<? extends NetconfSession> promise) {
+ if (maybeContext.isPresent()) {
+ initSsl(ch);
+ }
+
+ ch.pipeline().addLast("frameDecoder", NetconfMessageFactory.getDelimiterFrameDecoder());
+ ch.pipeline().addLast(handlerFactory.getDecoders());
+ initializeAfterDecoder(ch, promise);
+ ch.pipeline().addLast(handlerFactory.getEncoders());
+ }
+
+ protected abstract void initializeAfterDecoder(SocketChannel ch, Promise<? extends NetconfSession> promise);
+
+ private void initSsl(SocketChannel ch) {
+ SSLEngine sslEngine = maybeContext.get().createSSLEngine();
+ initSslEngine(sslEngine);
+ final SslHandler handler = new SslHandler(sslEngine);
+ ch.pipeline().addLast("ssl", handler);
+ }
+
+ protected abstract void initSslEngine(SSLEngine sslEngine);
+
+ private static final class NetconfHandlerFactory extends ProtocolHandlerFactory<NetconfMessage> {
+
+ public NetconfHandlerFactory(final NetconfMessageFactory msgFactory) {
+ super(msgFactory);
+ }
+
+ @Override
+ public ChannelHandler[] getEncoders() {
+ return new ChannelHandler[] { new ProtocolMessageEncoder(this.msgFactory) };
+ }
+
+ @Override
+ public ChannelHandler[] getDecoders() {
+ return new ChannelHandler[] { new ProtocolMessageDecoder(this.msgFactory) };
+ }
+ }
+}