Request handler
A request handler is a method used to handle each function invocation. When creating a function version, you should specify the entry point that consists of the name of the class that contains the handler (for example, FunctionNamespace.Handler).
Note
At any given time, a single function instance processes only one request. This lets you use global variables without having to provide data integrity control.
Depending on the programming model, the handler can accept and return different data. For more information about this and available ways to set the request handler, see the relevant section.