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| Current File : /var/www/talentgenesis_admin_backend/node_modules/@nestjs/microservices/client/client-rmq.js |
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ClientRMQ = void 0;
const logger_service_1 = require("@nestjs/common/services/logger.service");
const load_package_util_1 = require("@nestjs/common/utils/load-package.util");
const random_string_generator_util_1 = require("@nestjs/common/utils/random-string-generator.util");
const shared_utils_1 = require("@nestjs/common/utils/shared.utils");
const events_1 = require("events");
const rxjs_1 = require("rxjs");
const operators_1 = require("rxjs/operators");
const constants_1 = require("../constants");
const rmq_record_serializer_1 = require("../serializers/rmq-record.serializer");
const client_proxy_1 = require("./client-proxy");
let rqmPackage = {};
const REPLY_QUEUE = 'amq.rabbitmq.reply-to';
/**
* @publicApi
*/
class ClientRMQ extends client_proxy_1.ClientProxy {
constructor(options) {
super();
this.options = options;
this.logger = new logger_service_1.Logger(client_proxy_1.ClientProxy.name);
this.client = null;
this.channel = null;
this.urls = this.getOptionsProp(this.options, 'urls') || [constants_1.RQM_DEFAULT_URL];
this.queue =
this.getOptionsProp(this.options, 'queue') || constants_1.RQM_DEFAULT_QUEUE;
this.queueOptions =
this.getOptionsProp(this.options, 'queueOptions') ||
constants_1.RQM_DEFAULT_QUEUE_OPTIONS;
this.replyQueue =
this.getOptionsProp(this.options, 'replyQueue') || REPLY_QUEUE;
this.persistent =
this.getOptionsProp(this.options, 'persistent') || constants_1.RQM_DEFAULT_PERSISTENT;
this.noAssert =
this.getOptionsProp(this.options, 'noAssert') || constants_1.RQM_DEFAULT_NO_ASSERT;
(0, load_package_util_1.loadPackage)('amqplib', ClientRMQ.name, () => require('amqplib'));
rqmPackage = (0, load_package_util_1.loadPackage)('amqp-connection-manager', ClientRMQ.name, () => require('amqp-connection-manager'));
this.initializeSerializer(options);
this.initializeDeserializer(options);
}
close() {
this.channel && this.channel.close();
this.client && this.client.close();
this.channel = null;
this.client = null;
}
connect() {
if (this.client) {
return this.convertConnectionToPromise();
}
this.client = this.createClient();
this.handleError(this.client);
this.handleDisconnectError(this.client);
this.responseEmitter = new events_1.EventEmitter();
this.responseEmitter.setMaxListeners(0);
const connect$ = this.connect$(this.client);
const withDisconnect$ = this.mergeDisconnectEvent(this.client, connect$).pipe((0, operators_1.switchMap)(() => this.createChannel()));
const withReconnect$ = (0, rxjs_1.fromEvent)(this.client, constants_1.CONNECT_EVENT).pipe((0, operators_1.skip)(1));
const source$ = (0, rxjs_1.merge)(withDisconnect$, withReconnect$);
this.connection$ = new rxjs_1.ReplaySubject(1);
source$.subscribe(this.connection$);
return this.convertConnectionToPromise();
}
createChannel() {
return new Promise(resolve => {
this.channel = this.client.createChannel({
json: false,
setup: (channel) => this.setupChannel(channel, resolve),
});
});
}
createClient() {
const socketOptions = this.getOptionsProp(this.options, 'socketOptions');
return rqmPackage.connect(this.urls, {
connectionOptions: socketOptions,
});
}
mergeDisconnectEvent(instance, source$) {
const eventToError = (eventType) => (0, rxjs_1.fromEvent)(instance, eventType).pipe((0, operators_1.map)((err) => {
throw err;
}));
const disconnect$ = eventToError(constants_1.DISCONNECT_EVENT);
const urls = this.getOptionsProp(this.options, 'urls', []);
const connectFailed$ = eventToError(constants_1.CONNECT_FAILED_EVENT).pipe((0, operators_1.retryWhen)(e => e.pipe((0, operators_1.scan)((errorCount, error) => {
if (urls.indexOf(error.url) >= urls.length - 1) {
throw error;
}
return errorCount + 1;
}, 0))));
// If we ever decide to propagate all disconnect errors & re-emit them through
// the "connection" stream then comment out "first()" operator.
return (0, rxjs_1.merge)(source$, disconnect$, connectFailed$).pipe((0, operators_1.first)());
}
async convertConnectionToPromise() {
try {
return await (0, rxjs_1.firstValueFrom)(this.connection$);
}
catch (err) {
if (err instanceof rxjs_1.EmptyError) {
return;
}
throw err;
}
}
async setupChannel(channel, resolve) {
const prefetchCount = this.getOptionsProp(this.options, 'prefetchCount') ||
constants_1.RQM_DEFAULT_PREFETCH_COUNT;
const isGlobalPrefetchCount = this.getOptionsProp(this.options, 'isGlobalPrefetchCount') ||
constants_1.RQM_DEFAULT_IS_GLOBAL_PREFETCH_COUNT;
if (!this.queueOptions.noAssert) {
await channel.assertQueue(this.queue, this.queueOptions);
}
await channel.prefetch(prefetchCount, isGlobalPrefetchCount);
await this.consumeChannel(channel);
resolve();
}
async consumeChannel(channel) {
const noAck = this.getOptionsProp(this.options, 'noAck', constants_1.RQM_DEFAULT_NOACK);
await channel.consume(this.replyQueue, (msg) => this.responseEmitter.emit(msg.properties.correlationId, msg), {
noAck,
});
}
handleError(client) {
client.addListener(constants_1.ERROR_EVENT, (err) => this.logger.error(err));
}
handleDisconnectError(client) {
client.addListener(constants_1.DISCONNECT_EVENT, (err) => {
this.logger.error(constants_1.DISCONNECTED_RMQ_MESSAGE);
this.logger.error(err);
});
}
async handleMessage(packet, options, callback) {
if ((0, shared_utils_1.isFunction)(options)) {
callback = options;
options = undefined;
}
const { err, response, isDisposed } = await this.deserializer.deserialize(packet, options);
if (isDisposed || err) {
callback({
err,
response,
isDisposed: true,
});
}
callback({
err,
response,
});
}
publish(message, callback) {
try {
const correlationId = (0, random_string_generator_util_1.randomStringGenerator)();
const listener = ({ content, options, }) => this.handleMessage(this.parseMessageContent(content), options, callback);
Object.assign(message, { id: correlationId });
const serializedPacket = this.serializer.serialize(message);
const options = serializedPacket.options;
delete serializedPacket.options;
this.responseEmitter.on(correlationId, listener);
this.channel
.sendToQueue(this.queue, Buffer.from(JSON.stringify(serializedPacket)), {
replyTo: this.replyQueue,
persistent: this.persistent,
...options,
headers: this.mergeHeaders(options?.headers),
correlationId,
})
.catch(err => callback({ err }));
return () => this.responseEmitter.removeListener(correlationId, listener);
}
catch (err) {
callback({ err });
}
}
dispatchEvent(packet) {
const serializedPacket = this.serializer.serialize(packet);
const options = serializedPacket.options;
delete serializedPacket.options;
return new Promise((resolve, reject) => this.channel.sendToQueue(this.queue, Buffer.from(JSON.stringify(serializedPacket)), {
persistent: this.persistent,
...options,
headers: this.mergeHeaders(options?.headers),
}, (err) => (err ? reject(err) : resolve())));
}
initializeSerializer(options) {
this.serializer = options?.serializer ?? new rmq_record_serializer_1.RmqRecordSerializer();
}
mergeHeaders(requestHeaders) {
if (!requestHeaders && !this.options?.headers) {
return undefined;
}
return {
...this.options?.headers,
...requestHeaders,
};
}
parseMessageContent(content) {
const rawContent = content.toString();
try {
return JSON.parse(rawContent);
}
catch {
return rawContent;
}
}
}
exports.ClientRMQ = ClientRMQ;