Java - Rich logging in web services -

i have simple web service this:

@webservice public class mywebservice  {     @webmethod     public string processquery(@webparam(name="query") string q)     {     // logging here: user ip, etc.     }      public static void main(string[] args) throws exception      {     string address = "http://127.0.0.1:8023/_webservicedemo";     endpoint.publish(address, new mywebservice());     new documentserver();     system.out.println("listening: " + address);     } } 

i want add logging method service extract information. i've heard ncsa format , log4j don't know how use them in service. want log user's ip , other info. how can it?

thanks.

edit: should note main part of question how can retrieve data such user's ip, client, etc. in web method.

add webservicecontext class, can httpservletrequest:

@webservice public class mywebservice  {     @resource     webservicecontext wscontext;      @webmethod     public string processquery(@webparam(name="query") string q)     {         messagecontext messagecontext = wscontext.getmessagecontext();         httpservletrequest request = (httpservletrequest) messagecontext.get(soapmessagecontext.servlet_request);          // can want request     }  }