Exemplo n.º 1
0
// writeUser processes a single set of return values from Buffer.Read.
func (wc *writeConn) writeUser(writer *chain.ConnWriter, payload interface{}, seqno SeqNo, err error) (continueWriteLoop bool) {
	if err == io.EOF {
		// We've reached the EOF of the user write sequence.
		// Go back to listen for more reads from the buffer, in case a sync rewinds the buffer cursor.
		return true
	}
	if err == io.ErrUnexpectedEOF {
		// An unexpected termination has been reached, indicated by killing the buffer; nothing to send any longer.
		return false
	}
	if err != nil {
		panic("u")
	}
	// Encode chunk
	chunk := payload.(*Chunk)
	chunk.seqno = seqno // Sequence numbers are assigned 0-based integers
	raw, err := chunk.Encode()
	if err != nil {
		panic(err)
	}
	writer.Write(raw)
	// If connection is closed (no more writes) and the buffer is empty, it is time to kill the connection.
	if wc.bfr.Drained() {
		return false
	}
	return true
}
Exemplo n.º 2
0
// writeControl processes a single control message (SYNC or ACK).
// ok equals false if the connection is permanently broken and should be killed.
func writeControl(writer *chain.ConnWriter, msg encoder) {
	chunk, err := msg.Encode()
	if err != nil {
		panic(err)
	}
	writer.Write(chunk)
}