Java sockets - How to simulate multiple clients

Question

I have a socket program written in Java.

The server makes use of DatagramSocket to create a socket with a particular port number. I have a client java program, which connects to this server and sends some messages.

Currently I have 3 laptops so I use 1 to run the server and the remaining 2 to be clients. How can I simulate 100 clients?

I am thinking of writing a wrapper around the clients and call them 100 times, but the problem is with the ip-address for those simulated clients NOT being unique. Any guidance appreciated.

Here is the thing, Route and process every incoming request on new Thread. — foxt7ot, Apr 19 '15 at 05:14

score 3 · Answer 1 · answered Apr 19 '15 at 03:39

3

I would say use JMeter http://jmeter.apache.org/

TCP sampler: http://jmeter.apache.org/usermanual/component_reference.html#TCP_Sampler

You can call Java directly: http://jmeter.apache.org/usermanual/component_reference.html#Java_Request

answered Apr 19 '15 at 03:39

znurgl

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Will JMeter not use the same IP address for each client connection? The OP stated in his question that he wants a unique IP to be used for each client. – mdewit Jun 15 '16 at 12:30

score 2 · Accepted Answer · answered Apr 19 '15 at 04:04

the problem is with the ip-address for those simulated clients NOT being unique

No, the problem is that you are only identifying clients by their IP address. You should use IP:port, for example, via DatagramSocket.getRemoteSocketAddress().

Then you can test by running 100 instances of your client program in a single host.

Java sockets - How to simulate multiple clients

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