Registry
Name-based actor discovery and lookup.
Overview
The Registry provides a way to register actors by name and look them up later. This is useful when actors need to communicate without having direct address references.
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Registering Actors
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Looking Up Actors
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Registry::get() returns None if no actor is registered with that name, or if the registered actor has stopped.
Automatic Cleanup
When a registered actor stops, it is automatically removed from the registry:
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Service Discovery Pattern
services.rs
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Best Practices
Use constants for names
Define registry names as constants to avoid typos and enable refactoring.
Register early
Register services during startup before other actors try to look them up.
Handle missing services gracefully
Always check if get() returns None and handle the case appropriately.
One actor per name
Each name should map to exactly one actor. Re-registering overwrites the previous entry.