pg-transactional-outbox
Version:
A PostgreSQL based transactional outbox and inbox pattern implementation to support exactly once message processing (with at least once message delivery).
31 lines • 1.76 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.createReplicationSemaphoreConcurrencyController = void 0;
const async_mutex_1 = require("async-mutex");
/**
* Uses a semaphore to execute up to a given amount of messages in parallel. Any
* additional message waits until a currently processed message finishes.
* @returns The controller to acquire and release the semaphore and to cancel all semaphores
*/
const createReplicationSemaphoreConcurrencyController = (maxParallel) => {
const semaphore = new async_mutex_1.Semaphore(maxParallel);
return {
acquire: () => __awaiter(void 0, void 0, void 0, function* () {
// eslint-disable-next-line @typescript-eslint/no-unused-vars
const [_, release] = yield semaphore.acquire();
return release;
}),
cancel: semaphore.cancel.bind(semaphore),
};
};
exports.createReplicationSemaphoreConcurrencyController = createReplicationSemaphoreConcurrencyController;
//# sourceMappingURL=create-semaphore-concurrency-controller.js.map