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title: Registry sidebar_label: Registry

Registry allows to manage a set of extensions, which are expected to live under [:registry] path in app state. Using registry a host can add/delete/activate/deactivate extensions uniformly and all extension hooks will hook-in/unhook into/from host automatically.

(registry/add extension coeffects-map) ;; returns new effects map with extension added

Extensions id are unique. Hooks defined in extensions also must have global unique ids.

Once in a registry an extension is inactive. It can be either active or inactive.

(registry/deactivate extension-id coeffect-map) ;; returns new effects map with extension deactivated
(registry/activate extension-id coeffects-map) ;; returns new effects map with extension activated

When extension is deleted, all the hooks are deactivated (unhooked from the host) automatically, if it was in the active state before.

(registry/delete extension-id coeffects-map) ;; returns new effects map with extension deleted and (potential) unhook effects