How to call openfire plugins on client

Openfire Plugins Community Plugins
1

public Integer Add(Integer a,Integer b)
{
return a + b;
}

I want to add this function to the openfire plugin
So, How to write code in plugin and how to call this function in my client code?

Thanks.

2

Take a read of this - http://www.igniterealtime.org/builds/openfire/docs/latest/documentation/plugin-d ev-guide.html - it should help you get started. There are a number of ways your code can get called from clients, for example by intercepting XMPP packets, various server events, using adhoc commands etc.