Reworked Netconf framing mechanism, added chunked framing mechanism.

[controller.git] / opendaylight / netconf / netconf-util / src / main / java / org / opendaylight / controller / netconf / util / handler / ChunkedFramingMechanismEncoder.java

diff --git a/opendaylight/netconf/netconf-util/src/main/java/org/opendaylight/controller/netconf/util/handler/ChunkedFramingMechanismEncoder.java b/opendaylight/netconf/netconf-util/src/main/java/org/opendaylight/controller/netconf/util/handler/ChunkedFramingMechanismEncoder.java
new file mode 100644 (file)
index 0000000..7f710c9
--- /dev/null
+++ b/opendaylight/netconf/netconf-util/src/main/java/org/opendaylight/controller/netconf/util/handler/ChunkedFramingMechanismEncoder.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.controller.netconf.util.handler;
+
+import org.opendaylight.controller.netconf.util.messages.NetconfMessageFactory;
+import org.opendaylight.controller.netconf.util.messages.NetconfMessageHeader;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.MessageToByteEncoder;
+
+public class ChunkedFramingMechanismEncoder extends MessageToByteEncoder<ByteBuf> {
+
+    private final static Logger logger = LoggerFactory.getLogger(ChunkedFramingMechanismEncoder.class);
+
+    private NetconfMessageHeader messageHeader = new NetconfMessageHeader();
+
+    @Override
+    protected void encode(ChannelHandlerContext ctx, ByteBuf msg, ByteBuf out) throws Exception {
+        while (msg.readableBytes() > NetconfMessageFactory.MAX_CHUNK_SIZE) {
+            ByteBuf chunk = Unpooled.buffer(NetconfMessageFactory.MAX_CHUNK_SIZE);
+            chunk.writeBytes(createChunkHeader(NetconfMessageFactory.MAX_CHUNK_SIZE));
+            chunk.writeBytes(msg.readBytes(NetconfMessageFactory.MAX_CHUNK_SIZE));
+            ctx.write(chunk);
+        }
+        out.writeBytes(createChunkHeader(msg.readableBytes()));
+        out.writeBytes(msg.readBytes(msg.readableBytes()));
+        out.writeBytes(NetconfMessageFactory.endOfChunk);
+        logger.debug("Output message size is {}", out.readableBytes());
+    }
+
+    private ByteBuf createChunkHeader(int chunkSize) {
+        messageHeader.setLength(chunkSize);
+        logger.debug("Chunked data length is {}.", chunkSize);
+        return Unpooled.wrappedBuffer(messageHeader.toBytes());
+    }
+
+}