import org.opendaylight.controller.netconf.api.NetconfSessionListener;
import org.opendaylight.controller.netconf.api.NetconfSessionPreferences;
import org.opendaylight.controller.netconf.util.handler.FramingMechanismHandlerFactory;
-import org.opendaylight.controller.netconf.util.handler.NetconfMessageAggregator;
-import org.opendaylight.controller.netconf.util.handler.NetconfMessageChunkDecoder;
+import org.opendaylight.controller.netconf.util.handler.NetconfChunkAggregator;
+import org.opendaylight.controller.netconf.util.handler.NetconfMessageToXMLEncoder;
+import org.opendaylight.controller.netconf.util.handler.NetconfXMLToMessageDecoder;
import org.opendaylight.controller.netconf.util.messages.FramingMechanism;
-import org.opendaylight.controller.netconf.util.xml.XmlElement;
-import org.opendaylight.controller.netconf.util.xml.XmlNetconfConstants;
+import org.opendaylight.controller.netconf.util.messages.NetconfHelloMessage;
import org.opendaylight.controller.netconf.util.xml.XmlUtil;
import org.opendaylight.protocol.framework.AbstractSessionNegotiator;
import org.slf4j.Logger;
import com.google.common.base.Preconditions;
public abstract class AbstractNetconfSessionNegotiator<P extends NetconfSessionPreferences, S extends AbstractNetconfSession<S, L>, L extends NetconfSessionListener<S>>
-extends AbstractSessionNegotiator<NetconfMessage, S> {
+extends AbstractSessionNegotiator<NetconfHelloMessage, S> {
private static final Logger logger = LoggerFactory.getLogger(AbstractNetconfSessionNegotiator.class);
public static final String NAME_OF_EXCEPTION_HANDLER = "lastExceptionHandler";
}
@Override
- protected void handleMessage(NetconfMessage netconfMessage) {
+ protected void handleMessage(NetconfHelloMessage netconfMessage) {
final Document doc = netconfMessage.getDocument();
- if (isHelloMessage(doc)) {
- if (containsBase11Capability(doc)
- && containsBase11Capability(sessionPreferences.getHelloMessage().getDocument())) {
- channel.pipeline().replace("frameEncoder", "frameEncoder",
- FramingMechanismHandlerFactory.createHandler(FramingMechanism.CHUNK));
- channel.pipeline().replace("aggregator", "aggregator",
- new NetconfMessageAggregator(FramingMechanism.CHUNK));
- channel.pipeline().addAfter("aggregator", "chunkDecoder", new NetconfMessageChunkDecoder());
+ // Only Hello message should arrive during negotiation
+ if (netconfMessage instanceof NetconfHelloMessage) {
+
+ replaceHelloMessageHandlers();
+
+ if (shouldUseChunkFraming(doc)) {
+ insertChunkFramingToPipeline();
}
+
changeState(State.ESTABLISHED);
S session = getSession(sessionListener, channel, netconfMessage);
+
negotiationSuccessful(session);
} else {
final IllegalStateException cause = new IllegalStateException(
}
}
- protected abstract S getSession(L sessionListener, Channel channel, NetconfMessage message);
+ /**
+ * Insert chunk framing handlers into the pipeline
+ */
+ private void insertChunkFramingToPipeline() {
+ replaceChannelHandler(channel, AbstractChannelInitializer.NETCONF_MESSAGE_FRAME_ENCODER,
+ FramingMechanismHandlerFactory.createHandler(FramingMechanism.CHUNK));
+ replaceChannelHandler(channel, AbstractChannelInitializer.NETCONF_MESSAGE_AGGREGATOR,
+ new NetconfChunkAggregator());
+ }
+
+ private boolean shouldUseChunkFraming(Document doc) {
+ return containsBase11Capability(doc)
+ && containsBase11Capability(sessionPreferences.getHelloMessage().getDocument());
+ }
- private boolean isHelloMessage(Document doc) {
- try {
- XmlElement.fromDomElementWithExpected(doc.getDocumentElement(), "hello",
- XmlNetconfConstants.URN_IETF_PARAMS_XML_NS_NETCONF_BASE_1_0);
+ /**
+ * Remove special handlers for hello message. Insert regular netconf xml message (en|de)coders.
+ */
+ private void replaceHelloMessageHandlers() {
+ replaceChannelHandler(channel, AbstractChannelInitializer.NETCONF_MESSAGE_DECODER, new NetconfXMLToMessageDecoder());
+ replaceChannelHandler(channel, AbstractChannelInitializer.NETCONF_MESSAGE_ENCODER, new NetconfMessageToXMLEncoder());
+ }
- } catch (IllegalArgumentException | IllegalStateException e) {
- return false;
- }
- return true;
+ private static ChannelHandler replaceChannelHandler(Channel channel, String handlerKey, ChannelHandler decoder) {
+ return channel.pipeline().replace(handlerKey, handlerKey, decoder);
}
+ protected abstract S getSession(L sessionListener, Channel channel, NetconfHelloMessage message);
+
private synchronized void changeState(final State newState) {
logger.debug("Changing state from : {} to : {}", state, newState);
Preconditions.checkState(isStateChangePermitted(state, newState), "Cannot change state from %s to %s", state,