nats
Version:
Node.js client for NATS, a lightweight, high-performance cloud native messaging system
209 lines • 7.31 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());
});
};
var __asyncValues = (this && this.__asyncValues) || function (o) {
if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
var m = o[Symbol.asyncIterator], i;
return m ? m.call(o) : (o = typeof __values === "function" ? __values(o) : o[Symbol.iterator](), i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i);
function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }
function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.Perf = exports.collect = exports.shuffle = exports.debugDeferred = exports.deferred = exports.delay = exports.timeout = exports.render = exports.extend = exports.extractProtocolMessage = exports.protoLen = exports.isUint8Array = exports.LF = exports.CR = exports.CRLF = exports.CR_LF_LEN = exports.CR_LF = void 0;
/*
* Copyright 2018-2021 The NATS Authors
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// deno-lint-ignore-file no-explicit-any
const databuffer_1 = require("./databuffer");
const error_1 = require("./error");
const encoders_1 = require("./encoders");
exports.CR_LF = "\r\n";
exports.CR_LF_LEN = exports.CR_LF.length;
exports.CRLF = databuffer_1.DataBuffer.fromAscii(exports.CR_LF);
exports.CR = new Uint8Array(exports.CRLF)[0]; // 13
exports.LF = new Uint8Array(exports.CRLF)[1]; // 10
function isUint8Array(a) {
return a instanceof Uint8Array;
}
exports.isUint8Array = isUint8Array;
function protoLen(ba) {
for (let i = 0; i < ba.length; i++) {
const n = i + 1;
if (ba.byteLength > n && ba[i] === exports.CR && ba[n] === exports.LF) {
return n + 1;
}
}
return 0;
}
exports.protoLen = protoLen;
function extractProtocolMessage(a) {
// protocol messages are ascii, so Uint8Array
const len = protoLen(a);
if (len > 0) {
const ba = new Uint8Array(a);
const out = ba.slice(0, len);
return encoders_1.TD.decode(out);
}
return "";
}
exports.extractProtocolMessage = extractProtocolMessage;
function extend(a, ...b) {
for (let i = 0; i < b.length; i++) {
const o = b[i];
Object.keys(o).forEach(function (k) {
a[k] = o[k];
});
}
return a;
}
exports.extend = extend;
function render(frame) {
const cr = "␍";
const lf = "␊";
return encoders_1.TD.decode(frame)
.replace(/\n/g, lf)
.replace(/\r/g, cr);
}
exports.render = render;
function timeout(ms) {
// by generating the stack here to help identify what timed out
const err = error_1.NatsError.errorForCode(error_1.ErrorCode.Timeout);
let methods;
let timer;
const p = new Promise((_resolve, reject) => {
const cancel = () => {
if (timer) {
clearTimeout(timer);
}
};
methods = { cancel };
// @ts-ignore: node is not a number
timer = setTimeout(() => {
reject(err);
}, ms);
});
// noinspection JSUnusedAssignment
return Object.assign(p, methods);
}
exports.timeout = timeout;
function delay(ms = 0) {
return new Promise((resolve) => {
setTimeout(() => {
resolve();
}, ms);
});
}
exports.delay = delay;
/**
* Returns a Promise that has a resolve/reject methods that can
* be used to resolve and defer the Deferred.
*/
function deferred() {
let methods = {};
const p = new Promise((resolve, reject) => {
methods = { resolve, reject };
});
return Object.assign(p, methods);
}
exports.deferred = deferred;
function debugDeferred() {
let methods = {};
const p = new Promise((resolve, reject) => {
methods = {
resolve: (v) => {
console.trace("resolve", v);
resolve(v);
},
reject: (err) => {
console.trace("reject");
reject(err);
},
};
});
return Object.assign(p, methods);
}
exports.debugDeferred = debugDeferred;
function shuffle(a) {
for (let i = a.length - 1; i > 0; i--) {
const j = Math.floor(Math.random() * (i + 1));
[a[i], a[j]] = [a[j], a[i]];
}
return a;
}
exports.shuffle = shuffle;
function collect(iter) {
var _a, iter_1, iter_1_1;
var _b, e_1, _c, _d;
return __awaiter(this, void 0, void 0, function* () {
const buf = [];
try {
for (_a = true, iter_1 = __asyncValues(iter); iter_1_1 = yield iter_1.next(), _b = iter_1_1.done, !_b;) {
_d = iter_1_1.value;
_a = false;
try {
const v = _d;
buf.push(v);
}
finally {
_a = true;
}
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (!_a && !_b && (_c = iter_1.return)) yield _c.call(iter_1);
}
finally { if (e_1) throw e_1.error; }
}
return buf;
});
}
exports.collect = collect;
class Perf {
constructor() {
this.timers = new Map();
this.measures = new Map();
}
mark(key) {
this.timers.set(key, Date.now());
}
measure(key, startKey, endKey) {
const s = this.timers.get(startKey);
if (s === undefined) {
throw new Error(`${startKey} is not defined`);
}
const e = this.timers.get(endKey);
if (e === undefined) {
throw new Error(`${endKey} is not defined`);
}
this.measures.set(key, e - s);
}
getEntries() {
const values = [];
this.measures.forEach((v, k) => {
values.push({ name: k, duration: v });
});
return values;
}
}
exports.Perf = Perf;
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