J2EE application access from Portal - P4ObjectBroker

hey all,

I want to access access a J2EE application (Web Service) from a Portal Component. The documentation at http://help.sap.com/saphelp_nw04/helpdata/en/c0/a584409db95537e10000000a1550b0/content.htm shows an example.

They import the package <b>com.sap.engine.services.rmi_p4.P4ObjectBroker</b>. I cannot find the package on my system, i.e. my local portal installation.

Does anybody know what kind of package is required, or where I can find this package...

many thanks in advance

cheers Sascha