boxlang-core-dev-interceptors
BoxLang Interceptors
Overview
BoxLang's interceptor system implements the Observer and Intercepting Filter design patterns. Interceptors listen for named events (interception points) announced by the runtime, modules, or application code. They enable cross-cutting concerns like logging, security, AOP, routing, and content manipulation without modifying core code.
Interceptor Pools
Three pools exist in the runtime. Each pool is an independent event emitter:
| Pool | Scope | Use Case |
|---|---|---|
| Global Runtime | Entire BoxLang process | Module events, parse events, global AOP |
| Application Request Listener | Per-application request lifecycle | Auth, routing, request logging |
| CacheProviders | Per cache instance | Cache event hooks |
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