1. A processor-implemented Dynamic Java Message Service Emulation method, comprising: instantiating, via one or more hardware processors, a Dynamic Enterprise Java Bean (DEJB); receiving, from a source system, via the one or more hardware processors, a request at the DEJB, the request queued in a request queue of the source system, the request received in accordance with a priority level of the request; identifying, based on the request, via the one or more hardware processors, a system for which system integration testing is to be performed; generating, based on identifying the system for which system integration testing is to be performed, via the one or more hardware processors, a query for business rules for processing the request; receiving, responsive to the query, via the one or more hardware processors and via a Java Bean framework, the business rules; configuring, via the one or more hardware processors and the Java Bean framework, the DEJB using the business rules; processing, via the one or more hardware processors, the request using the configured DEJB to perform integration testing of the system identified based on the request and generate a respective response; and providing, via the one or more hardware processors, the response as an output of the configured DEJB.