To integrate third party rules software with Content Platform Engine workflows, you must provide an implementation for the IFNRules listener interface.
The IFNRules listener interface is contained in the re.jar that is installed with the Rules Connectivity Framework.
The Rules Connectivity Framework contains a sample implementation of the IFNRules listener interface in the filenet\rules\implementation\sample folder where the Rules Connectivity Framework is installed. The sample rules listener will trace the transfer and rule execution requests that it receives from the workflow server. The sample is not a fully functional Rules Listener; it does not execute any rules. A functioning Rules Listener requires a Rules Connector and a Rules Engine that can be provided by a Rules Engine vendor.