Pedestal

Chain Providers

The building blocks of Pedestal are not limited to web applications. The interceptor concept is very general and can be used in message-processing or dataflow applications just as well as request/reply web services.

A chain provider invokes a queue of interceptors in response to some stimulus. The job of a chain provider is to accept incoming stimuli (requests, messages, events, commands, etc.) set up the context map and execute a queue of interceptors via execute.

For HTTP, the servlet interceptor is the chain provider.