Merge "BUG 1853 : Clustered Data Store causes Out of Memory"

[controller.git] / opendaylight / netconf / netconf-client / src / main / java / org / opendaylight / controller / netconf / client / NetconfClientSessionNegotiator.java

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 971ea39ade5b6fb57d07a041f999ec18890528df..cbbee1f65508353b117bbd21db22b523b4244694 100644 (file)
--- 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
@@ -8,6 +8,9 @@
 
 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;
@@ -48,17 +51,17 @@ public class NetconfClientSessionNegotiator extends
 
     private static final String EXI_1_0_CAPABILITY_MARKER = "exi:1.0";
 
-    protected NetconfClientSessionNegotiator(NetconfClientSessionPreferences sessionPreferences,
-                                             Promise<NetconfClientSession> promise,
-                                             Channel channel,
-                                             Timer timer,
-                                             NetconfClientSessionListener sessionListener,
-                                             long connectionTimeoutMillis) {
+    protected NetconfClientSessionNegotiator(final NetconfClientSessionPreferences sessionPreferences,
+                                             final Promise<NetconfClientSession> 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) throws NetconfDocumentedException {
+    protected void handleMessage(final NetconfHelloMessage netconfMessage) throws NetconfDocumentedException {
         final NetconfClientSession session = getSessionForHelloMessage(netconfMessage);
         replaceHelloMessageInboundHandler(session);
 
@@ -68,8 +71,8 @@ public class NetconfClientSessionNegotiator extends
             logger.debug("Netconf session {} should use exi.", session);
             NetconfStartExiMessage startExiMessage = (NetconfStartExiMessage) sessionPreferences.getStartExiMessage();
             tryToInitiateExi(session, startExiMessage);
-        // Exi is not supported, release session immediately
         } else {
+            // Exi is not supported, release session immediately
             logger.debug("Netconf session {} isn't capable of using exi.", session);
             negotiationSuccessful(session);
         }
@@ -98,7 +101,7 @@ public class NetconfClientSessionNegotiator extends
         });
     }
 
-    private boolean shouldUseExi(NetconfHelloMessage helloMsg) {
+    private boolean shouldUseExi(final NetconfHelloMessage helloMsg) {
         return containsExi10Capability(helloMsg.getDocument())
                 && containsExi10Capability(sessionPreferences.getHelloMessage().getDocument());
     }
@@ -113,8 +116,9 @@ public class NetconfClientSessionNegotiator extends
         return false;
     }
 
-    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");
@@ -124,10 +128,14 @@ public class NetconfClientSessionNegotiator extends
     }
 
     @Override
-    protected NetconfClientSession getSession(NetconfClientSessionListener sessionListener, Channel channel,
-            NetconfHelloMessage message) throws NetconfDocumentedException {
+    protected NetconfClientSession getSession(final NetconfClientSessionListener sessionListener, final Channel channel,
+            final NetconfHelloMessage message) throws NetconfDocumentedException {
         long sessionId = extractSessionId(message.getDocument());
-        Collection<String> capabilities = NetconfMessageUtil.extractCapabilitiesFromHello(message.getDocument());
+
+        // Copy here is important: it disconnects the strings from the document
+        Collection<String> 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);
     }
 
@@ -138,15 +146,15 @@ public class NetconfClientSessionNegotiator extends
         private static final String EXI_CONFIRMED_HANDLER = "exiConfirmedHandler";
 
         private final NetconfClientSession session;
-        private NetconfStartExiMessage startExiMessage;
+        private final NetconfStartExiMessage startExiMessage;
 
-        ExiConfirmationInboundHandler(NetconfClientSession session, final NetconfStartExiMessage startExiMessage) {
+        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;