Patent attributes
Systems and methods are described for generating and executing metaevents within an on-demand code execution environment. The code execution environment can include virtual machine instances that are pre-initialized to enable low latency execution of arbitrary user-defined code. Code execution can typically occur in response to a defined event trigger, such as a call to an application programming interface (API) from an external source. Code execution may also occur in response to metadata regarding the operation of the code execution environment. A user may specify criteria for “metaevents” based on the metadata, and also specify code to be executed in response to satisfaction of the criteria. When the code execution environment determines that the user's criteria is satisfied, a metaevent may be generated that causes execution of the set of code. This execution may, in turn, generate metadata that triggers one or more metaevents.
