import io.netty.channel.socket.SocketChannel;
import io.netty.util.concurrent.Promise;
+
import org.opendaylight.controller.netconf.api.NetconfSession;
+import org.opendaylight.controller.netconf.util.handler.FramingMechanismHandlerFactory;
+import org.opendaylight.controller.netconf.util.handler.NetconfHelloMessageToXMLEncoder;
+import org.opendaylight.controller.netconf.util.handler.NetconfMessageAggregator;
+import org.opendaylight.controller.netconf.util.handler.NetconfXMLToHelloMessageDecoder;
+import org.opendaylight.controller.netconf.util.messages.FramingMechanism;
+
+public abstract class AbstractChannelInitializer<S extends NetconfSession> {
+
+ public static final String NETCONF_MESSAGE_DECODER = "netconfMessageDecoder";
+ public static final String NETCONF_MESSAGE_AGGREGATOR = "aggregator";
+ public static final String NETCONF_MESSAGE_ENCODER = "netconfMessageEncoder";
+ public static final String NETCONF_MESSAGE_FRAME_ENCODER = "frameEncoder";
+ public static final String NETCONF_SESSION_NEGOTIATOR = "negotiator";
+
+ public void initialize(SocketChannel ch, Promise<S> promise) {
+ ch.pipeline().addLast(NETCONF_MESSAGE_AGGREGATOR, new NetconfMessageAggregator(FramingMechanism.EOM));
+ initializeMessageDecoder(ch);
+ ch.pipeline().addLast(NETCONF_MESSAGE_FRAME_ENCODER, FramingMechanismHandlerFactory.createHandler(FramingMechanism.EOM));
+ initializeMessageEncoder(ch);
+
+ initializeSessionNegotiator(ch, promise);
+ }
-public abstract class AbstractChannelInitializer {
+ protected void initializeMessageEncoder(SocketChannel ch) {
+ // Special encoding handler for hello message to include additional header if available,
+ // it is thrown away after successful negotiation
+ ch.pipeline().addLast(NETCONF_MESSAGE_ENCODER, new NetconfHelloMessageToXMLEncoder());
+ }
- public abstract void initialize(SocketChannel ch, Promise<? extends NetconfSession> promise);
+ protected void initializeMessageDecoder(SocketChannel ch) {
+ // Special decoding handler for hello message to parse additional header if available,
+ // it is thrown away after successful negotiation
+ ch.pipeline().addLast(NETCONF_MESSAGE_DECODER, new NetconfXMLToHelloMessageDecoder());
+ }
- protected abstract void initializeAfterDecoder(SocketChannel ch, Promise<? extends NetconfSession> promise);
+ /**
+ * Insert session negotiator into the pipeline. It must be inserted after message decoder
+ * identified by {@link AbstractChannelInitializer#NETCONF_MESSAGE_DECODER}, (or any other custom decoder processor)
+ */
+ protected abstract void initializeSessionNegotiator(SocketChannel ch, Promise<S> promise);
}