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Текущая директория: /usr/lib/node_modules/bitgo/node_modules/@celo/base/lib
Просмотр файла: task.js
"use strict";
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
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());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.tryObtainValueWithRetries = exports.conditionWatcher = exports.repeatTask = void 0;
var future_1 = require("./future");
var logger_1 = require("./logger");
/**
* Given task options, creates the task logger
*
* It will prefix taskName to the logs
*/
var createTaskLogger = function (opts) {
if (opts.logger) {
return (0, logger_1.prefixLogger)(opts.name, opts.logger);
}
else {
return logger_1.noopLogger;
}
};
/**
* Runs an async function eternally until stopped
*
* @param fn function to run
*/
function repeatTask(opts, fn) {
var _this = this;
var logger = createTaskLogger(opts);
var isActive = true;
var ctx = {
executionNumber: 0,
stopTask: function () {
isActive = false;
},
};
var loop = function () { return __awaiter(_this, void 0, void 0, function () {
var err_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (!isActive) {
return [2 /*return*/];
}
_a.label = 1;
case 1:
_a.trys.push([1, 3, 4, 5]);
ctx.executionNumber++;
return [4 /*yield*/, fn(ctx)];
case 2:
_a.sent();
return [3 /*break*/, 5];
case 3:
err_1 = _a.sent();
logger("Failed with error: ".concat(err_1.message));
logger(err_1);
return [3 /*break*/, 5];
case 4:
if (isActive) {
setTimeout(loop, opts.timeInBetweenMS);
}
return [7 /*endfinally*/];
case 5: return [2 /*return*/];
}
});
}); };
if (opts.initialDelayMS != null) {
setTimeout(loop, opts.initialDelayMS);
}
else {
// tslint:disable-next-line: no-floating-promises
loop();
}
return {
stop: ctx.stopTask,
isRunning: function () {
return isActive;
},
};
}
exports.repeatTask = repeatTask;
function conditionWatcher(opts) {
var _this = this;
return repeatTask(opts, function (ctx) { return __awaiter(_this, void 0, void 0, function () {
var val;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, opts.pollCondition()];
case 1:
val = _a.sent();
if (!val) return [3 /*break*/, 3];
ctx.stopTask();
return [4 /*yield*/, opts.onSuccess()];
case 2:
_a.sent();
_a.label = 3;
case 3: return [2 /*return*/];
}
});
}); });
}
exports.conditionWatcher = conditionWatcher;
function tryObtainValueWithRetries(opts) {
var _this = this;
var futureValue = new future_1.Future();
var task = repeatTask(opts, function (ctx) { return __awaiter(_this, void 0, void 0, function () {
var val;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (!(ctx.executionNumber > opts.maxAttemps)) return [3 /*break*/, 1];
ctx.stopTask();
futureValue.reject(new Error('Max Retries & no value'));
return [3 /*break*/, 3];
case 1: return [4 /*yield*/, opts.tryGetValue()];
case 2:
val = _a.sent();
if (val != null) {
futureValue.resolve(val);
ctx.stopTask();
}
_a.label = 3;
case 3: return [2 /*return*/];
}
});
}); });
return __assign(__assign({}, task), { stop: function () {
task.stop();
futureValue.reject(new Error('Cancelled'));
}, onValue: function () { return futureValue.asPromise(); } });
}
exports.tryObtainValueWithRetries = tryObtainValueWithRetries;
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