The requestexits parameter specifies a list of one or more classes that perform request monitoring.
requestexits=com.ibm.ctg.samples.requestexit.1stMonitor,com.ibm.ctg.samples.requestexit.2ndMonitor
You can use the -requestexits= option on the ctgstart command to override the value of requestexits. For more information, see Options on the ctgstart command.
This parameter is in the GATEWAY section of the configuration file.