void send(int code, MessageLite req) throws IOException {
int len = req.getSerializedSize();
dout.writeInt(len + 1);
dout.write(code);
req.writeTo(dout);
dout.flush();
}
public boolean tryWrite(MessageLite message) {
try {
codedOutput.writeRawLittleEndian32(message.getSerializedSize());
message.writeTo(codedOutput);
// writes to the underlying output stream
codedOutput.flush();
return connection.tryFlush();
} catch (IOException e) {
throw new RuntimeException(e);
}
}