AppSymphony is a purpose built API Integration Engine which can enable JRE users to link disparate data sets and applications into a unified workflow engine to dynamically process data and generate Mission Data Files. The challenge of integrating multiple sources of data and applications into a streamlined workflow, automating the processing of data, and instrumenting the development and generation of new Mission Data Files is addressed by the application of an Event Driven Architecture approach and a Graph Based visual programming-based integration engine. The Event Driven Architecture provides a zero-integration platform by consuming the existing APIs of applications to be integrated and performing mapping to move data from one system to another in each applications native API format using a messaging interface. The graph based visual programming engine enables the operators to create and modify executable workflows in an easy to learn visual style that does not require extensive programming knowledge.