Function defined event streams from multiple event streams and events

Abstract

Disclosed are techniques for function-defined output streams corresponding to combinations of events published to one or more event notification streams in an event-driven architecture with a plurality of event notification streams. An output function is received defining a combination of event notifications with criteria for selecting which event notifications to combine from one or more event notification streams. The one or more event notification streams are parsed, and event notifications are selected to initialize a new event notification stream, where event notifications in this stream correspond to instances of the output function when provided a set of event notifications from the one or more event notification streams as input values. When an event notification is published to the one or more event notification streams meeting the criteria specified in the output function, the new event notification stream publishes an event notification corresponding to an output value from the output function.