public virtual void TestSingleFrame()
{
RpcUtil.RpcFrameDecoder decoder = new RpcUtil.RpcFrameDecoder();
// Test "Length field is not received yet"
ByteBuffer buffer = ByteBuffer.Allocate(1);
ChannelBuffer buf = new ByteBufferBackedChannelBuffer(buffer);
ChannelBuffer channelBuffer = (ChannelBuffer)decoder.Decode(Org.Mockito.Mockito.Mock
<ChannelHandlerContext>(), Org.Mockito.Mockito.Mock <Org.Jboss.Netty.Channel.Channel
>(), buf);
Assert.True(channelBuffer == null);
// Test all bytes are not received yet
byte[] fragment = new byte[4 + 9];
fragment[0] = unchecked ((byte)(1 << 7));
// final fragment
fragment[1] = 0;
fragment[2] = 0;
fragment[3] = unchecked ((byte)10);
// fragment size = 10 bytes
Assert.True(XDR.IsLastFragment(fragment));
Assert.True(XDR.FragmentSize(fragment) == 10);
buffer = ByteBuffer.Allocate(4 + 9);
buffer.Put(fragment);
buffer.Flip();
buf = new ByteBufferBackedChannelBuffer(buffer);
channelBuffer = (ChannelBuffer)decoder.Decode(Org.Mockito.Mockito.Mock <ChannelHandlerContext
>(), Org.Mockito.Mockito.Mock <Org.Jboss.Netty.Channel.Channel>(), buf);
Assert.True(channelBuffer == null);
}
public override void MessageReceived(ChannelHandlerContext ctx, MessageEvent e)
{
ChannelBuffer buf = (ChannelBuffer)e.GetMessage();
// Read reply
if (!ValidMessageLength(buf.ReadableBytes()))
{
e.GetChannel().Close();
return;
}
// handling fragment header for TCP, 4 bytes.
byte[] fragmentHeader = Arrays.CopyOfRange(buf.Array(), 0, 4);
int fragmentSize = XDR.FragmentSize(fragmentHeader);
bool isLast = XDR.IsLastFragment(fragmentHeader);
System.Diagnostics.Debug.Assert((fragmentSize == 28 && isLast == true));
XDR xdr = new XDR();
xdr.WriteFixedOpaque(Arrays.CopyOfRange(buf.Array(), 4, buf.ReadableBytes()));
RpcReply reply = RpcReply.Read(xdr);
if (reply.GetState() == RpcReply.ReplyState.MsgAccepted)
{
RpcAcceptedReply acceptedReply = (RpcAcceptedReply)reply;
Handle(acceptedReply, xdr);
}
else
{
RpcDeniedReply deniedReply = (RpcDeniedReply)reply;
Handle(deniedReply);
}
e.GetChannel().Close();
}
public virtual void TestMultipleFrames()
{
RpcUtil.RpcFrameDecoder decoder = new RpcUtil.RpcFrameDecoder();
// Test multiple frames
byte[] fragment1 = new byte[4 + 10];
fragment1[0] = 0;
// not final fragment
fragment1[1] = 0;
fragment1[2] = 0;
fragment1[3] = unchecked ((byte)10);
// fragment size = 10 bytes
NUnit.Framework.Assert.IsFalse(XDR.IsLastFragment(fragment1));
Assert.True(XDR.FragmentSize(fragment1) == 10);
// decoder should wait for the final fragment
ByteBuffer buffer = ByteBuffer.Allocate(4 + 10);
buffer.Put(fragment1);
buffer.Flip();
ChannelBuffer buf = new ByteBufferBackedChannelBuffer(buffer);
ChannelBuffer channelBuffer = (ChannelBuffer)decoder.Decode(Org.Mockito.Mockito.Mock
<ChannelHandlerContext>(), Org.Mockito.Mockito.Mock <Org.Jboss.Netty.Channel.Channel
>(), buf);
Assert.True(channelBuffer == null);
byte[] fragment2 = new byte[4 + 10];
fragment2[0] = unchecked ((byte)(1 << 7));
// final fragment
fragment2[1] = 0;
fragment2[2] = 0;
fragment2[3] = unchecked ((byte)10);
// fragment size = 10 bytes
Assert.True(XDR.IsLastFragment(fragment2));
Assert.True(XDR.FragmentSize(fragment2) == 10);
buffer = ByteBuffer.Allocate(4 + 10);
buffer.Put(fragment2);
buffer.Flip();
buf = new ByteBufferBackedChannelBuffer(buffer);
channelBuffer = (ChannelBuffer)decoder.Decode(Org.Mockito.Mockito.Mock <ChannelHandlerContext
>(), Org.Mockito.Mockito.Mock <Org.Jboss.Netty.Channel.Channel>(), buf);
Assert.True(channelBuffer != null);
// Complete frame should have to total size 10+10=20
Assert.Equal(20, channelBuffer.ReadableBytes());
}
protected override object Decode(ChannelHandlerContext ctx, Org.Jboss.Netty.Channel.Channel
channel, ChannelBuffer buf)
{
if (buf.ReadableBytes() < 4)
{
return(null);
}
buf.MarkReaderIndex();
byte[] fragmentHeader = new byte[4];
buf.ReadBytes(fragmentHeader);
int length = XDR.FragmentSize(fragmentHeader);
bool isLast = XDR.IsLastFragment(fragmentHeader);
if (buf.ReadableBytes() < length)
{
buf.ResetReaderIndex();
return(null);
}
ChannelBuffer newFragment = buf.ReadSlice(length);
if (currentFrame == null)
{
currentFrame = newFragment;
}
else
{
currentFrame = ChannelBuffers.WrappedBuffer(currentFrame, newFragment);
}
if (isLast)
{
ChannelBuffer completeFrame = currentFrame;
currentFrame = null;
return(completeFrame);
}
else
{
return(null);
}
}