X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?p=controller.git;a=blobdiff_plain;f=opendaylight%2Fnetconf%2Fnetconf-client%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fnetconf%2Fclient%2FNetconfClientSessionNegotiator.java;h=a8c9a6526ddde26b67b42b6c09fe738fd7484f87;hp=83f49b2635a5d0699d2b31615fc3c20927d4f878;hb=ed6019236d78a69577888f60064c3714eaa80f6a;hpb=860206dfce8edb0fe74be842d2101f0eac7db2bd diff --git a/opendaylight/netconf/netconf-client/src/main/java/org/opendaylight/controller/netconf/client/NetconfClientSessionNegotiator.java b/opendaylight/netconf/netconf-client/src/main/java/org/opendaylight/controller/netconf/client/NetconfClientSessionNegotiator.java index 83f49b2635..a8c9a6526d 100644 --- a/opendaylight/netconf/netconf-client/src/main/java/org/opendaylight/controller/netconf/client/NetconfClientSessionNegotiator.java +++ b/opendaylight/netconf/netconf-client/src/main/java/org/opendaylight/controller/netconf/client/NetconfClientSessionNegotiator.java @@ -8,17 +8,28 @@ package org.opendaylight.controller.netconf.client; +import com.google.common.base.Preconditions; +import com.google.common.collect.ImmutableList; +import io.netty.channel.Channel; +import io.netty.channel.ChannelFuture; +import io.netty.channel.ChannelFutureListener; +import io.netty.channel.ChannelHandlerContext; +import io.netty.channel.ChannelInboundHandlerAdapter; +import io.netty.util.Timer; +import io.netty.util.concurrent.Promise; +import java.util.Collection; import javax.xml.xpath.XPathConstants; import javax.xml.xpath.XPathExpression; - import org.opendaylight.controller.netconf.api.NetconfClientSessionPreferences; +import org.opendaylight.controller.netconf.api.NetconfDocumentedException; import org.opendaylight.controller.netconf.api.NetconfMessage; -import org.opendaylight.controller.netconf.util.AbstractChannelInitializer; -import org.opendaylight.controller.netconf.util.AbstractNetconfSessionNegotiator; +import org.opendaylight.controller.netconf.api.xml.XmlNetconfConstants; +import org.opendaylight.controller.netconf.nettyutil.AbstractChannelInitializer; +import org.opendaylight.controller.netconf.nettyutil.AbstractNetconfSessionNegotiator; +import org.opendaylight.controller.netconf.nettyutil.handler.exi.NetconfStartExiMessage; import org.opendaylight.controller.netconf.util.messages.NetconfHelloMessage; import org.opendaylight.controller.netconf.util.messages.NetconfMessageUtil; import org.opendaylight.controller.netconf.util.xml.XMLNetconfUtil; -import org.opendaylight.controller.netconf.util.xml.XmlNetconfConstants; import org.opendaylight.controller.netconf.util.xml.XmlUtil; import org.slf4j.Logger; import org.slf4j.LoggerFactory; @@ -26,48 +37,68 @@ import org.w3c.dom.Document; import org.w3c.dom.Node; import org.w3c.dom.NodeList; -import io.netty.channel.Channel; -import io.netty.channel.ChannelFuture; -import io.netty.channel.ChannelFutureListener; -import io.netty.channel.ChannelHandlerContext; -import io.netty.channel.ChannelInboundHandlerAdapter; -import io.netty.util.Timer; -import io.netty.util.concurrent.Promise; - public class NetconfClientSessionNegotiator extends AbstractNetconfSessionNegotiator { - private static final Logger logger = LoggerFactory.getLogger(NetconfClientSessionNegotiator.class); + private static final Logger LOG = LoggerFactory.getLogger(NetconfClientSessionNegotiator.class); private static final XPathExpression sessionIdXPath = XMLNetconfUtil .compileXPath("/netconf:hello/netconf:session-id"); private static final String EXI_1_0_CAPABILITY_MARKER = "exi:1.0"; - protected NetconfClientSessionNegotiator(NetconfClientSessionPreferences sessionPreferences, - Promise promise, - Channel channel, - Timer timer, - NetconfClientSessionListener sessionListener, - long connectionTimeoutMillis) { + protected NetconfClientSessionNegotiator(final NetconfClientSessionPreferences sessionPreferences, + final Promise promise, + final Channel channel, + final Timer timer, + final NetconfClientSessionListener sessionListener, + final long connectionTimeoutMillis) { super(sessionPreferences, promise, channel, timer, sessionListener, connectionTimeoutMillis); } @Override - protected void handleMessage(NetconfHelloMessage netconfMessage) { - NetconfClientSession session = super.getSessionForHelloMessage(netconfMessage); - - if (shouldUseExi(netconfMessage.getDocument())){ - logger.info("Netconf session: {} should use exi.", session); - tryToStartExi(session); + protected void handleMessage(final NetconfHelloMessage netconfMessage) throws NetconfDocumentedException { + final NetconfClientSession session = getSessionForHelloMessage(netconfMessage); + replaceHelloMessageInboundHandler(session); + + // If exi should be used, try to initiate exi communication + // Call negotiationSuccessFul after exi negotiation is finished successfully or not + if (shouldUseExi(netconfMessage)) { + LOG.debug("Netconf session {} should use exi.", session); + NetconfStartExiMessage startExiMessage = (NetconfStartExiMessage) sessionPreferences.getStartExiMessage(); + tryToInitiateExi(session, startExiMessage); } else { - logger.info("Netconf session {} isn't capable using exi.", session); + // Exi is not supported, release session immediately + LOG.debug("Netconf session {} isn't capable of using exi.", session); negotiationSuccessful(session); } } - private boolean shouldUseExi(Document doc) { - return containsExi10Capability(doc) + /** + * Initiates exi communication by sending start-exi message and waiting for positive/negative response. + * + * @param startExiMessage + */ + void tryToInitiateExi(final NetconfClientSession session, final NetconfStartExiMessage startExiMessage) { + channel.pipeline().addAfter(AbstractChannelInitializer.NETCONF_MESSAGE_DECODER, + ExiConfirmationInboundHandler.EXI_CONFIRMED_HANDLER, + new ExiConfirmationInboundHandler(session, startExiMessage)); + + session.sendMessage(startExiMessage).addListener(new ChannelFutureListener() { + @Override + public void operationComplete(final ChannelFuture f) { + if (!f.isSuccess()) { + LOG.warn("Failed to send start-exi message {} on session {}", startExiMessage, this, f.cause()); + channel.pipeline().remove(ExiConfirmationInboundHandler.EXI_CONFIRMED_HANDLER); + } else { + LOG.trace("Start-exi message {} sent to socket on session {}", startExiMessage, this); + } + } + }); + } + + private boolean shouldUseExi(final NetconfHelloMessage helloMsg) { + return containsExi10Capability(helloMsg.getDocument()) && containsExi10Capability(sessionPreferences.getHelloMessage().getDocument()); } @@ -81,25 +112,9 @@ public class NetconfClientSessionNegotiator extends return false; } - private void tryToStartExi(final NetconfClientSession session) { - final NetconfMessage startExi = sessionPreferences.getStartExiMessage(); - session.sendMessage(startExi).addListener(new ChannelFutureListener() { - @Override - public void operationComplete(final ChannelFuture f) { - if (!f.isSuccess()) { - logger.warn("Failed to send start-exi message {} on session {}", startExi, session, f.cause()); - } else { - logger.trace("Start-exi message {} sent to socket on session {}", startExi, session); - NetconfClientSessionNegotiator.this.channel.pipeline().addAfter( - AbstractChannelInitializer.NETCONF_MESSAGE_DECODER, ExiConfirmationInboundHandler.EXI_CONFIRMED_HANDLER, - new ExiConfirmationInboundHandler(session)); - } - } - }); - } - - private long extractSessionId(Document doc) { + private long extractSessionId(final Document doc) { final Node sessionIdNode = (Node) XmlUtil.evaluateXPath(sessionIdXPath, doc, XPathConstants.NODE); + Preconditions.checkState(sessionIdNode != null, ""); String textContent = sessionIdNode.getTextContent(); if (textContent == null || textContent.equals("")) { throw new IllegalStateException("Session id not received from server"); @@ -109,9 +124,15 @@ public class NetconfClientSessionNegotiator extends } @Override - protected NetconfClientSession getSession(NetconfClientSessionListener sessionListener, Channel channel, NetconfHelloMessage message) { - return new NetconfClientSession(sessionListener, channel, extractSessionId(message.getDocument()), - NetconfMessageUtil.extractCapabilitiesFromHello(message.getDocument())); + protected NetconfClientSession getSession(final NetconfClientSessionListener sessionListener, final Channel channel, + final NetconfHelloMessage message) throws NetconfDocumentedException { + long sessionId = extractSessionId(message.getDocument()); + + // Copy here is important: it disconnects the strings from the document + Collection capabilities = ImmutableList.copyOf(NetconfMessageUtil.extractCapabilitiesFromHello(message.getDocument())); + + // FIXME: scalability: we could instantiate a cache to share the same collections + return new NetconfClientSession(sessionListener, channel, sessionId, capabilities); } /** @@ -121,42 +142,45 @@ public class NetconfClientSessionNegotiator extends private static final String EXI_CONFIRMED_HANDLER = "exiConfirmedHandler"; private final NetconfClientSession session; + private final NetconfStartExiMessage startExiMessage; - ExiConfirmationInboundHandler(NetconfClientSession session) { + ExiConfirmationInboundHandler(final NetconfClientSession session, final NetconfStartExiMessage startExiMessage) { this.session = session; + this.startExiMessage = startExiMessage; } @Override - public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception { + public void channelRead(final ChannelHandlerContext ctx, final Object msg) throws Exception { ctx.pipeline().remove(ExiConfirmationInboundHandler.EXI_CONFIRMED_HANDLER); NetconfMessage netconfMessage = (NetconfMessage) msg; // Ok response to start-exi, try to add exi handlers if (NetconfMessageUtil.isOKMessage(netconfMessage)) { - logger.trace("Positive response on start-exi call received on session {}", session); + LOG.trace("Positive response on start-exi call received on session {}", session); try { - session.startExiCommunication(sessionPreferences.getStartExiMessage()); + session.startExiCommunication(startExiMessage); } catch (RuntimeException e) { // Unable to add exi, continue without exi - logger.warn("Unable to start exi communication, Communication will continue without exi on session {}", session, e); + LOG.warn("Unable to start exi communication, Communication will continue without exi on session {}", session, e); } - // Error response + // Error response } else if(NetconfMessageUtil.isErrorMessage(netconfMessage)) { - logger.warn( + LOG.warn( "Error response to start-exi message {}, Communication will continue without exi on session {}", XmlUtil.toString(netconfMessage.getDocument()), session); - // Unexpected response to start-exi, throwing message away, continue without exi + // Unexpected response to start-exi, throwing message away, continue without exi } else { - logger.warn( - "Unexpected response to start-exi message, should be ok, was {}, " + - "Communication will continue without exi and response message will be thrown away on session {}", - XmlUtil.toString(netconfMessage.getDocument()), session); + LOG.warn( + "Unexpected response to start-exi message, should be ok, was {}, ",XmlUtil.toString(netconfMessage.getDocument()), + "Communication will continue without exi and response message will be thrown away on session {}", + session); } negotiationSuccessful(session); } } + }