1 | "use strict";
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2 | Object.defineProperty(exports, "__esModule", { value: true });
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3 | exports.ServerRedis = void 0;
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4 | const shared_utils_1 = require("@nestjs/common/utils/shared.utils");
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5 | const constants_1 = require("../constants");
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6 | const ctx_host_1 = require("../ctx-host");
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7 | const enums_1 = require("../enums");
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8 | const server_1 = require("./server");
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9 | let redisPackage = {};
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10 | class ServerRedis extends server_1.Server {
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11 | constructor(options) {
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12 | super();
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13 | this.options = options;
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14 | this.transportId = enums_1.Transport.REDIS;
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15 | this.isExplicitlyTerminated = false;
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16 | redisPackage = this.loadPackage('ioredis', ServerRedis.name, () => require('ioredis'));
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17 | this.initializeSerializer(options);
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18 | this.initializeDeserializer(options);
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19 | }
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20 | listen(callback) {
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21 | try {
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22 | this.subClient = this.createRedisClient();
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23 | this.pubClient = this.createRedisClient();
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24 | this.handleError(this.pubClient);
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25 | this.handleError(this.subClient);
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26 | this.start(callback);
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27 | }
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28 | catch (err) {
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29 | callback(err);
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30 | }
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31 | }
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32 | start(callback) {
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33 | Promise.all([this.subClient.connect(), this.pubClient.connect()])
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34 | .then(() => {
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35 | this.bindEvents(this.subClient, this.pubClient);
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36 | callback();
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37 | })
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38 | .catch(callback);
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39 | }
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40 | bindEvents(subClient, pubClient) {
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41 | subClient.on(constants_1.MESSAGE_EVENT, this.getMessageHandler(pubClient).bind(this));
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42 | const subscribePatterns = [...this.messageHandlers.keys()];
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43 | subscribePatterns.forEach(pattern => {
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44 | const { isEventHandler } = this.messageHandlers.get(pattern);
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45 | subClient.subscribe(isEventHandler ? pattern : this.getRequestPattern(pattern));
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46 | });
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47 | }
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48 | close() {
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49 | this.isExplicitlyTerminated = true;
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50 | this.pubClient && this.pubClient.quit();
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51 | this.subClient && this.subClient.quit();
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52 | }
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53 | createRedisClient() {
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54 | return new redisPackage(Object.assign(Object.assign({ port: constants_1.REDIS_DEFAULT_PORT, host: constants_1.REDIS_DEFAULT_HOST }, this.getClientOptions()), { lazyConnect: true }));
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55 | }
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56 | getMessageHandler(pub) {
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57 | return async (channel, buffer) => this.handleMessage(channel, buffer, pub);
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58 | }
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59 | async handleMessage(channel, buffer, pub) {
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60 | const rawMessage = this.parseMessage(buffer);
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61 | const packet = await this.deserializer.deserialize(rawMessage, { channel });
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62 | const redisCtx = new ctx_host_1.RedisContext([channel]);
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63 | if ((0, shared_utils_1.isUndefined)(packet.id)) {
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64 | return this.handleEvent(channel, packet, redisCtx);
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65 | }
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66 | const publish = this.getPublisher(pub, channel, packet.id);
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67 | const handler = this.getHandlerByPattern(channel);
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68 | if (!handler) {
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69 | const status = 'error';
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70 | const noHandlerPacket = {
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71 | id: packet.id,
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72 | status,
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73 | err: constants_1.NO_MESSAGE_HANDLER,
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74 | };
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75 | return publish(noHandlerPacket);
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76 | }
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77 | const response$ = this.transformToObservable(await handler(packet.data, redisCtx));
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78 | response$ && this.send(response$, publish);
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79 | }
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80 | getPublisher(pub, pattern, id) {
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81 | return (response) => {
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82 | Object.assign(response, { id });
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83 | const outgoingResponse = this.serializer.serialize(response);
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84 | return pub.publish(this.getReplyPattern(pattern), JSON.stringify(outgoingResponse));
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85 | };
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86 | }
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87 | parseMessage(content) {
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88 | try {
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89 | return JSON.parse(content);
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90 | }
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91 | catch (e) {
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92 | return content;
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93 | }
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94 | }
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95 | getRequestPattern(pattern) {
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96 | return pattern;
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97 | }
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98 | getReplyPattern(pattern) {
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99 | return `${pattern}.reply`;
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100 | }
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101 | handleError(stream) {
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102 | stream.on(constants_1.ERROR_EVENT, (err) => this.logger.error(err));
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103 | }
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104 | getClientOptions() {
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105 | const retryStrategy = (times) => this.createRetryStrategy(times);
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106 | return Object.assign(Object.assign({}, (this.options || {})), { retryStrategy });
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107 | }
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108 | createRetryStrategy(times) {
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109 | if (this.isExplicitlyTerminated) {
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110 | return undefined;
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111 | }
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112 | if (!this.getOptionsProp(this.options, 'retryAttempts') ||
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113 | times > this.getOptionsProp(this.options, 'retryAttempts')) {
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114 | this.logger.error(`Retry time exhausted`);
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115 | return;
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116 | }
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117 | return this.getOptionsProp(this.options, 'retryDelay') || 0;
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118 | }
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119 | }
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120 | exports.ServerRedis = ServerRedis;
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