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Use MutableHashSet for NATS stream cache

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elpresidank 2026-06-04 06:33:11 -05:00
parent 6ba4cf3b32
commit 451c6dbc58
3 changed files with 40 additions and 3 deletions
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7
ts/packages/base/src/backend/nats.ts
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@ -24,6 +24,7 @@ import {
DeliverPolicy,
} from "nats";
import { Effect } from "effect";
import * as MutableHashSet from "effect/MutableHashSet";
import * as P from "effect/Predicate";
import * as S from "effect/Schema";
@ -288,7 +289,7 @@ export function makeNatsBackend(url = "nats://localhost:4222"): PubSubBackend {
let connection: NatsConnection | null = null;
let js: JetStreamClient | null = null;
let jsm: JetStreamManager | null = null;
const initializedStreams = new Set<string>();
const initializedStreams = MutableHashSet.empty<string>();
const ensureConnected = Effect.fn("NatsBackend.ensureConnected")(function* () {
if (connection === null) {
@ -313,7 +314,7 @@ export function makeNatsBackend(url = "nats://localhost:4222"): PubSubBackend {
const parts = subject.split(".");
const streamName = parts.slice(0, 2).join("_");
if (initializedStreams.has(streamName)) return streamName;
if (MutableHashSet.has(initializedStreams, streamName)) return streamName;
const wildcardSubject = `${parts.slice(0, 2).join(".")}.>`;
@ -338,7 +339,7 @@ export function makeNatsBackend(url = "nats://localhost:4222"): PubSubBackend {
(error) => Effect.fail(pubSubError(error.operation, error.cause)),
),
);
initializedStreams.add(streamName);
MutableHashSet.add(initializedStreams, streamName);
return streamName;
});