@yingyeothon/actor-system
Version:
A basic actor system only using a queue and a lock.
69 lines • 3.03 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 });
const utils_1 = require("./utils");
const awaitPolicy_1 = require("../message/awaitPolicy");
const notifyCompletion_1 = require("../awaiter/notifyCompletion");
const logger_1 = require("@yingyeothon/logger");
function processInSingleMode(env, isAlive) {
return __awaiter(this, void 0, void 0, function* () {
if (!isAlive()) {
return [];
}
const { id, onPrepare, onCommit } = env;
if (onPrepare) {
yield (0, utils_1.maybeAwait)(onPrepare(id));
}
const localMetas = yield processQueueInLock(env, isAlive);
if (onCommit) {
yield (0, utils_1.maybeAwait)(onCommit(id));
}
return localMetas;
});
}
exports.default = processInSingleMode;
const processQueueInLock = (env, isAlive) => __awaiter(void 0, void 0, void 0, function* () {
const { queue, id, logger = logger_1.nullLogger } = env;
logger.debug(`actor`, `process-queue-in-single`, id);
const messageMetas = [];
const notifyPromises = [];
while (isAlive() && (yield queue.size(id)) > 0) {
const message = yield queue.peek(id);
logger.debug(`actor`, `get-message`, id, message);
if (!message) {
logger.debug(`actor`, `invalid-message`, id, message);
break;
}
yield processMessage(env, message);
messageMetas.push((0, utils_1.copyAwaiterMeta)(message));
if (message.awaitPolicy === awaitPolicy_1.default.Act) {
notifyPromises.push((0, notifyCompletion_1.default)(env, message));
}
yield queue.pop(id);
logger.debug(`actor`, `delete-message`, id);
}
yield Promise.all(notifyPromises);
return messageMetas;
});
const processMessage = (env, message) => __awaiter(void 0, void 0, void 0, function* () {
const { id, logger = logger_1.nullLogger, onMessage, onError } = env;
try {
logger.debug(`actor`, `process-user-message`, id, message);
yield (0, utils_1.maybeAwait)(onMessage(message.item));
}
catch (error) {
logger.error(`actor`, `process-user-message-error`, id, message, error);
if (onError) {
yield (0, utils_1.maybeAwait)(onError(error));
}
}
});
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