STREAM-BASED REACTIVE PROGRAMMING PLATFORM

Stream-based programming models allow subscriber to observe a stream of stream items received from a source, such as event notifications and updates to observed data. Presented herein is a stream-based reactive programming platform that allows observers to discover sources and streams, and to specify queries applicable to sources that results in new streams, including conditions that apply to the properties of a federation of sources. Variations of the reactive programming platform include generating a new stream from a non-reactive data source; generating a graph of sources and observers; and providing a directory of discoverable elements respectively identified by uniform resource identifiers. The reactive stream-based programming platform may also permit parameterization to configure the functionality of the elements participating in the stream; delegation of query tasks to discoverable elements of the programming platform; and federation of a heterogeneous set of elements to achieve a query using the reactive stream-based programming platform.