void SendMessage(FrontendMessage msg)
{
try
{
_log.DebugFormat("Sending: {0}", msg);
var asSimple = msg as SimpleFrontendMessage;
if (asSimple != null)
{
if (asSimple.Length > Buffer.WriteSpaceLeft)
{
Buffer.Flush();
}
Contract.Assume(Buffer.WriteSpaceLeft >= asSimple.Length);
asSimple.Write(Buffer);
return;
}
var asComplex = msg as ChunkingFrontendMessage;
if (asComplex != null)
{
var directBuf = new DirectBuffer();
while (!asComplex.Write(Buffer, ref directBuf))
{
Buffer.Flush();
// The following is an optimization hack for writing large byte arrays without passing
// through our buffer
if (directBuf.Buffer != null)
{
Buffer.Underlying.Write(directBuf.Buffer, 0, directBuf.Size == 0 ? directBuf.Buffer.Length : directBuf.Size);
directBuf.Buffer = null;
directBuf.Size = 0;
}
}
return;
}
throw PGUtil.ThrowIfReached();
}
catch
{
State = ConnectorState.Broken;
throw;
}
}
/// <summary>
/// Prepends a message to be sent at the beginning of the next message chain.
/// </summary>
internal void PrependMessage(FrontendMessage msg)
{
_prependedMessages++;
_messagesToSend.Add(msg);
}
/// <summary>
/// Sends a single frontend message, used for simple messages such as rollback, etc.
/// Note that additional prepend messages may be previously enqueued, and will be sent along
/// with this message.
/// </summary>
/// <param name="msg"></param>
void SendSingleMessage(FrontendMessage msg)
{
AddMessage(msg);
SendAllMessages();
}
internal void AddMessage(FrontendMessage msg)
{
_messagesToSend.Add(msg);
}