@apiratorjs/locking-redis/dist/src/distributed-releaser.js

An extension to the core @apiratorjs/locking library, providing Redis-based implementations of distributed mutexes and semaphores for true cross-process concurrency control in Node.js.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.DistributedReleaser = void 0;
class DistributedReleaser {
    constructor(onRelease, token) {
        this.onRelease = onRelease;
        this.token = token;
        this.isReleased = false;
    }
    /**
     * Releasing is idempotent: one releaser owns exactly one acquisition, so
     * repeated calls must not unlock again (or hand a semaphore permit back twice).
     *
     * A failed `onRelease` does not stick the releaser in a released state, so
     * the caller can retry after a transient Redis/network error.
     */
    async release() {
        if (this.isReleased) {
            return;
        }
        if (!this.releasePromise) {
            this.releasePromise = (async () => {
                try {
                    await this.onRelease();
                    this.isReleased = true;
                }
                finally {
                    this.releasePromise = undefined;
                }
            })();
        }
        return this.releasePromise;
    }
    getToken() {
        return this.token;
    }
}
exports.DistributedReleaser = DistributedReleaser;
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