PID

A PID is the sole actor reference in GoAkt. It is a live handle to a running actor—either local (same process) or remote (another node). All messaging goes through a PID.

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Role

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Local vs Remote

Use pid.IsLocal() or pid.IsRemote() when location matters. pid.ActorSystem() returns nil for remote PIDs—guard before use.

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Key methods

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Obtaining a PID

• Spawn — system.Spawn(ctx, name, actor) returns a local PID.
• ActorOf — system.ActorOf(ctx, name) returns local or remote PID.
• Context — ctx.Self() (current actor), ctx.Sender() (message sender).

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NoSender

system.NoSender() returns a special PID for messages without a sender (e.g., scheduled messages, external clients). Use it when sending from outside the actor system. NoSender().Path() may be used for wire encoding.