wait-for-kafka
Version:
Ensures that certain Kafka topics exist
140 lines (139 loc) • 6.42 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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) : new P(function (resolve) { resolve(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 });
var debug = require('debug')('wait-for-kafka:debug');
var error = require('debug')('wait-for-kafka:error');
function doesTopicsExists(client, topics) {
return __awaiter(this, void 0, void 0, function () {
var e_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
_a.trys.push([0, 2, , 3]);
return [4 /*yield*/, client.topicExistsAsync(topics)];
case 1:
_a.sent();
return [2 /*return*/, true];
case 2:
e_1 = _a.sent();
if (e_1.constructor.name === 'TopicsNotExistError' || e_1.constructor.name === 'BrokerNotAvailableError') {
return [2 /*return*/, false];
}
else {
throw e_1;
}
return [3 /*break*/, 3];
case 3: return [2 /*return*/];
}
});
});
}
function sleep(ms) {
return new Promise(function (resolve) { return setTimeout(resolve, ms); });
}
function wait_for_topics(client, topics, abort_after_tries, wait_between_tries_s) {
return __awaiter(this, void 0, void 0, function () {
var tries, exists;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
tries = 0;
_a.label = 1;
case 1:
if (!(tries < abort_after_tries)) return [3 /*break*/, 4];
return [4 /*yield*/, doesTopicsExists(client, topics)];
case 2:
exists = _a.sent();
if (exists === true) {
return [2 /*return*/, true];
}
else {
debug("One of the topics still does not exist:", topics);
}
tries++;
return [4 /*yield*/, sleep(wait_between_tries_s * 1000)];
case 3:
_a.sent();
return [3 /*break*/, 1];
case 4: return [2 /*return*/, false];
}
});
});
}
exports.wait_for_topics = wait_for_topics;
function ensure_topics(client, topics) {
return __awaiter(this, void 0, void 0, function () {
var topics_to_create, _a, _b, _i, i, topic, exists, results, i, result;
return __generator(this, function (_c) {
switch (_c.label) {
case 0:
topics_to_create = new Array();
_a = [];
for (_b in topics)
_a.push(_b);
_i = 0;
_c.label = 1;
case 1:
if (!(_i < _a.length)) return [3 /*break*/, 4];
i = _a[_i];
topic = topics[i];
return [4 /*yield*/, doesTopicsExists(client, [topic['topic']])];
case 2:
exists = _c.sent();
if (!exists) {
topics_to_create.push(topic);
}
_c.label = 3;
case 3:
_i++;
return [3 /*break*/, 1];
case 4: return [4 /*yield*/, client.createTopicsAsync(topics_to_create)];
case 5:
results = _c.sent();
for (i in results) {
result = results[i];
if (result['error']) {
error('Error creating topic', result);
return [2 /*return*/, false];
}
}
return [2 /*return*/, true];
}
});
});
}
exports.ensure_topics = ensure_topics;