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StoreStorage (Durable's storage on Chord v2's store, @earendil-works/pi-durable/storage/store) passes Durable's storage conformance suite and runs Durable's harness tests (npm run test:store). The store gets owner names and claims, one id allocator, Durable's Storage semantics for refused steps, history none/latest/rewindable with reads at a point, archive revisions and applyBatch. self.follow follows Durable's synchronous observers as Chord sources. Persisted jobs: records and state in the owner's store, restarts as Durable's tasks, abort stored, deferred state. Chord's ./next export returns for the adapter surface.
33 lines
1.2 KiB
TypeScript
33 lines
1.2 KiB
TypeScript
// The store's id allocator (slice 6b D3, §1.2): one counter for every id in the store (Durable's `mintId`, Chord's
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// document ids), synchronous, raised by explicit ids, saturating at `Number.MAX_SAFE_INTEGER`.
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/** The first id the allocator gives: id 1 is Durable's root conversation. */
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export const FIRST_ID = 2;
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/**
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* The allocator: `value` is the next id it gives. An id raised to `Number.MAX_SAFE_INTEGER` is accepted, the value
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* stays there, and every later `mint` throws: no id past the safe range (it would stop counting exactly and repeat).
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*/
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export class IdAllocator {
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#next: number;
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constructor(next: number) {
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this.#next = next;
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}
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/** The next id `mint` gives; what each commit persists. */
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get value(): number {
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return this.#next;
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}
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/** Takes the next id; throws "ID space is exhausted" once saturated (Durable's message). */
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mint(): number {
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if (this.#next >= Number.MAX_SAFE_INTEGER) throw new Error("ID space is exhausted");
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return this.#next++;
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}
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/** Raises the counter above `id`, an id written explicitly (Durable mints ahead), saturating. */
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raise(id: number): void {
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if (id >= this.#next) this.#next = Math.min(id + 1, Number.MAX_SAFE_INTEGER);
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}
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}
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