From 8bedb6be52f21b52d6df08d1501cf46f8ddbdbdc Mon Sep 17 00:00:00 2001
From: Maros Marsalek <mmarsale@cisco.com>
Date: Thu, 5 Feb 2015 10:53:41 +0100
Subject: [PATCH] BUG-2679 Workaround for wrong nagasena encode/decode with
 reused transmogrifier

Change-Id: I76b94b896e138e778f0a6abd6d42a481347f1a13
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>
---
 .../handler/NetconfMessageToEXIEncoder.java      | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/opendaylight/netconf/netconf-netty-util/src/main/java/org/opendaylight/controller/netconf/nettyutil/handler/NetconfMessageToEXIEncoder.java b/opendaylight/netconf/netconf-netty-util/src/main/java/org/opendaylight/controller/netconf/nettyutil/handler/NetconfMessageToEXIEncoder.java
index aceb6ac520..5d6d1aa083 100644
--- a/opendaylight/netconf/netconf-netty-util/src/main/java/org/opendaylight/controller/netconf/nettyutil/handler/NetconfMessageToEXIEncoder.java
+++ b/opendaylight/netconf/netconf-netty-util/src/main/java/org/opendaylight/controller/netconf/nettyutil/handler/NetconfMessageToEXIEncoder.java
@@ -30,23 +30,29 @@ public final class NetconfMessageToEXIEncoder extends MessageToByteEncoder<Netco
     private static final Logger LOG = LoggerFactory.getLogger(NetconfMessageToEXIEncoder.class);
     /**
      * This class is not marked as shared, so it can be attached to only a single channel,
-     * which means that {@link #encode(ChannelHandlerContext, NetconfMessage, ByteBuf)}
+     * which means that {@link #encode(io.netty.channel.ChannelHandlerContext, org.opendaylight.controller.netconf.api.NetconfMessage, io.netty.buffer.ByteBuf)}
      * cannot be invoked concurrently. Hence we can reuse the transmogrifier.
      */
-    private final Transmogrifier transmogrifier;
+    private final NetconfEXICodec codec;
 
-    private NetconfMessageToEXIEncoder(final Transmogrifier transmogrifier) {
-        this.transmogrifier = Preconditions.checkNotNull(transmogrifier);
+    private NetconfMessageToEXIEncoder(final NetconfEXICodec codec) {
+        this.codec = Preconditions.checkNotNull(codec);
     }
 
     public static NetconfMessageToEXIEncoder create(final NetconfEXICodec codec) throws EXIOptionsException, TransmogrifierException {
-        return new NetconfMessageToEXIEncoder(codec.getTransmogrifier());
+        return new NetconfMessageToEXIEncoder(codec);
     }
 
     @Override
     protected void encode(final ChannelHandlerContext ctx, final NetconfMessage msg, final ByteBuf out) throws EXIOptionsException, IOException, TransformerException, TransmogrifierException {
         LOG.trace("Sent to encode : {}", msg);
 
+        // TODO Workaround for bug 2679, recreate transmogrifier every time
+        // If the transmogrifier is reused, encoded xml can become non valid according to EXI decoder
+        // Seems like a bug in the nagasena library (try newer version of the library or fix the bug inside of it)
+        // Related bugs 2459: reuse nagasena resources, 2458: upgrade nagasena to newest version
+        final Transmogrifier transmogrifier = codec.getTransmogrifier();
+
         try (final OutputStream os = new ByteBufOutputStream(out)) {
             transmogrifier.setOutputStream(os);
             final ContentHandler handler = transmogrifier.getSAXTransmogrifier();
-- 
2.36.6