Module: RactorRailsShim::StorageStrategy

Defined in:
lib/ractor_rails_shim/foundation/storage_strategy.rb

Defined Under Namespace

Modules: Ractor, Thread

Constant Summary collapse

CA_KEY_CACHE_KEY =

Literal key for the per-receiver class_attribute storage-key cache, stored in ractor-local IES (IsolatedExecutionState) so each Ractor carries its own copy (no cross-ractor shareability concern — and class variables are illegal from non-main Ractors).

:"__ractor_rails_shim_ca_key_cache__"

Class Method Summary collapse

Class Method Details

.ca_key(owner, attr_sym) ⇒ Object

Per-receiver class_attribute storage-key cache. Maps (attribute-symbol, receiver-object_id) -> storage-key-symbol so the hot reader path does NOT re-build a :"..." interpolated key on every read (which allocated ~2 strings/symbols per read). The key is derived once per (attribute, class) and memoized in ractor-local IES. After the first (warm-up) read for a class, all subsequent reads hit the cache with zero allocation.



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# File 'lib/ractor_rails_shim/foundation/storage_strategy.rb', line 40

def self.ca_key(owner, attr_sym)
  oid = (owner.is_a?(Module) ? owner : owner.class).object_id
  cache = RactorRailsShim.storage[CA_KEY_CACHE_KEY]
  unless cache
    cache = {}
    RactorRailsShim.storage[CA_KEY_CACHE_KEY] = cache
  end
  inner = cache[attr_sym]
  unless inner
    inner = {}
    cache[attr_sym] = inner
  end
  kkey = inner[oid]
  unless kkey
    kkey = :"ractor_rails_shim_class_attr_#{oid}_#{attr_sym}"
    inner[oid] = kkey
  end
  kkey
end