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Locking

Why you need it​

Concurrent Steps and RPCs must not corrupt shared Attributes.

Code examples​

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# StepOptions: execute_lock_attribute_keys=["balance"]
# RPC: lock_attribute_keys=["balance"]

Declare lock attribute keys on Step options and RPC invocations.

How Dex implements it​

Dex serializes access to locked Attributes for WaitFor/Execute/RPC critical sections.

Traditional workarounds​

Without Dex: SELECT FOR UPDATE, Redis locks, or “hope” — with unclear ownership across services.