@aeolun/graphql-redis-subscriptions
Version:
A graphql-subscriptions PubSub Engine using redis
195 lines • 9.7 kB
JavaScript
;
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
if (typeof b !== "function" && b !== null)
throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
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 (g && (g = 0, op[0] && (_ = 0)), _) 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; }
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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.RedisPubSub = void 0;
var graphql_subscriptions_continued_1 = require("graphql-subscriptions-continued");
var RedisPubSub = (function (_super) {
__extends(RedisPubSub, _super);
function RedisPubSub(options) {
if (options === void 0) { options = {}; }
var _this = _super.call(this) || this;
var triggerTransform = options.triggerTransform, connection = options.connection, connectionListener = options.connectionListener, subscriber = options.subscriber, publisher = options.publisher, reviver = options.reviver, serializer = options.serializer, deserializer = options.deserializer, _a = options.messageEventName, messageEventName = _a === void 0 ? 'message' : _a, _b = options.pmessageEventName, pmessageEventName = _b === void 0 ? 'pmessage' : _b;
_this.triggerTransform = triggerTransform || (function (trigger) { return trigger; });
if (reviver && deserializer) {
throw new Error("Reviver and deserializer can't be used together");
}
_this.reviver = reviver;
_this.serializer = serializer;
_this.deserializer = deserializer;
if (subscriber && publisher) {
_this.redisPublisher = publisher;
_this.redisSubscriber = subscriber;
}
else {
try {
var IORedis = require('ioredis');
_this.redisPublisher = new IORedis(connection);
_this.redisSubscriber = new IORedis(connection);
if (connectionListener) {
_this.redisPublisher
.on('connect', connectionListener)
.on('error', connectionListener);
_this.redisSubscriber
.on('connect', connectionListener)
.on('error', connectionListener);
}
else {
_this.redisPublisher.on('error', console.error);
_this.redisSubscriber.on('error', console.error);
}
}
catch (error) {
console.error("No publisher or subscriber instances were provided and the package 'ioredis' wasn't found. Couldn't create Redis clients.");
}
}
_this.redisSubscriber.on(pmessageEventName, _this.onMessage.bind(_this));
_this.redisSubscriber.on(messageEventName, _this.onMessage.bind(_this, undefined));
_this.subscriptionMap = {};
_this.subsRefsMap = new Map();
_this.currentSubscriptionId = 0;
return _this;
}
RedisPubSub.prototype.publish = function (trigger, payload) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4, this.redisPublisher.publish(trigger, this.serializer ? this.serializer(payload) : JSON.stringify(payload))];
case 1:
_a.sent();
return [2];
}
});
});
};
RedisPubSub.prototype.subscribe = function (trigger, onMessage, options) {
var _this = this;
if (options === void 0) { options = {}; }
var triggerName = this.triggerTransform(trigger, options);
var id = this.currentSubscriptionId++;
this.subscriptionMap[id] = [triggerName, onMessage];
if (!this.subsRefsMap.has(triggerName)) {
this.subsRefsMap.set(triggerName, new Set());
}
var refs = this.subsRefsMap.get(triggerName);
if (refs.size > 0) {
refs.add(id);
return Promise.resolve(id);
}
else {
return new Promise(function (resolve, reject) {
var subscribeFn = options['pattern'] ? _this.redisSubscriber.psubscribe : _this.redisSubscriber.subscribe;
subscribeFn.call(_this.redisSubscriber, triggerName, function (err) {
if (err) {
reject(err);
}
else {
refs.add(id);
resolve(id);
}
});
});
}
};
RedisPubSub.prototype.unsubscribe = function (subId) {
var _a = (this.subscriptionMap[subId] || [])[0], triggerName = _a === void 0 ? null : _a;
var refs = this.subsRefsMap.get(triggerName);
if (!refs)
throw new Error("There is no subscription of id \"".concat(subId, "\""));
if (refs.size === 1) {
this.redisSubscriber.unsubscribe(triggerName);
this.redisSubscriber.punsubscribe(triggerName);
this.subsRefsMap.delete(triggerName);
}
else {
refs.delete(subId);
}
delete this.subscriptionMap[subId];
};
RedisPubSub.prototype.asyncIterator = function (triggers, options) {
return new graphql_subscriptions_continued_1.PubSubAsyncIterableIterator(this, triggers, options);
};
RedisPubSub.prototype.getSubscriber = function () {
return this.redisSubscriber;
};
RedisPubSub.prototype.getPublisher = function () {
return this.redisPublisher;
};
RedisPubSub.prototype.close = function () {
return Promise.all([
this.redisPublisher.quit(),
this.redisSubscriber.quit(),
]);
};
RedisPubSub.prototype.onMessage = function (pattern, channel, message) {
var _this = this;
var subscribers = this.subsRefsMap.get(pattern || channel);
if (!(subscribers === null || subscribers === void 0 ? void 0 : subscribers.size))
return;
var parsedMessage;
try {
parsedMessage = this.deserializer
? this.deserializer(message, { pattern: pattern, channel: channel })
: JSON.parse(message, this.reviver);
}
catch (e) {
parsedMessage = message;
}
subscribers.forEach(function (subId) {
var _a = _this.subscriptionMap[subId], listener = _a[1];
listener(parsedMessage);
});
};
return RedisPubSub;
}(graphql_subscriptions_continued_1.PubSubEngine));
exports.RedisPubSub = RedisPubSub;
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