CODEWITHSUNDEEP
socketsjava
Georg Schölly
Georg Schölly

Reputation: 126165

How to make Java send multiple messages together?

Here's an extract of my code:

OutputStream out = this.socket.getOutputStream();
out.write(fourBytes);
out.write(someBytes);
out.flush();

This gets sent in 2 packages, even though the first one is only 4 bytes long. Is there another way than concatenating the byte arrays together to send them together?

I've already tried setTcpNoDelay(false).

Upvotes: 3

Views: 1069

Answers (3)

Suraj Chandran
Suraj Chandran

Reputation: 24801

I think disabling Nagle is done by setTcpNoDelay(true)

Upvotes: 0

Ramesh PVK
Ramesh PVK

Reputation: 15456

Wrap it with buffered output stream

Upvotes: 1

C. K. Young
C. K. Young

Reputation: 223173

Sure. Use a BufferedOutputStream. :-P

The setTcpNoDelay changes how the OS sends packets, not how Java sends packets. The only way to change the latter is to buffer your output, as I suggested above.

BTW, this doesn't affect how many packets your data is really split up into. Again, that is up to the OS, as well as the window specified by the receiving end. So you can't use packets to delimit data.

Upvotes: 3

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