1 | "use strict";
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2 | Object.defineProperty(exports, "__esModule", { value: true });
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3 | exports.Server = void 0;
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4 | const logger_service_1 = require("@nestjs/common/services/logger.service");
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5 | const load_package_util_1 = require("@nestjs/common/utils/load-package.util");
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6 | const rxjs_1 = require("rxjs");
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7 | const operators_1 = require("rxjs/operators");
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8 | const constants_1 = require("../constants");
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9 | const incoming_request_deserializer_1 = require("../deserializers/incoming-request.deserializer");
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10 | const identity_serializer_1 = require("../serializers/identity.serializer");
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11 | const utils_1 = require("../utils");
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12 | class Server {
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13 | constructor() {
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14 | this.messageHandlers = new Map();
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15 | this.logger = new logger_service_1.Logger(Server.name);
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16 | }
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17 | addHandler(pattern, callback, isEventHandler = false, extras = {}) {
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18 | const normalizedPattern = this.normalizePattern(pattern);
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19 | callback.isEventHandler = isEventHandler;
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20 | callback.extras = extras;
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21 | if (this.messageHandlers.has(normalizedPattern) && isEventHandler) {
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22 | const headRef = this.messageHandlers.get(normalizedPattern);
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23 | const getTail = (handler) => (handler === null || handler === void 0 ? void 0 : handler.next) ? getTail(handler.next) : handler;
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24 | const tailRef = getTail(headRef);
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25 | tailRef.next = callback;
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26 | }
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27 | else {
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28 | this.messageHandlers.set(normalizedPattern, callback);
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29 | }
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30 | }
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31 | getHandlers() {
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32 | return this.messageHandlers;
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33 | }
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34 | getHandlerByPattern(pattern) {
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35 | const route = this.getRouteFromPattern(pattern);
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36 | return this.messageHandlers.has(route)
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37 | ? this.messageHandlers.get(route)
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38 | : null;
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39 | }
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40 | send(stream$, respond) {
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41 | let dataBuffer = null;
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42 | const scheduleOnNextTick = (data) => {
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43 | if (!dataBuffer) {
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44 | dataBuffer = [data];
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45 | process.nextTick(async () => {
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46 | for (const item of dataBuffer) {
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47 | await respond(item);
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48 | }
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49 | dataBuffer = null;
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50 | });
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51 | }
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52 | else if (!data.isDisposed) {
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53 | dataBuffer = dataBuffer.concat(data);
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54 | }
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55 | else {
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56 | dataBuffer[dataBuffer.length - 1].isDisposed = data.isDisposed;
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57 | }
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58 | };
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59 | return stream$
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60 | .pipe((0, operators_1.catchError)((err) => {
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61 | scheduleOnNextTick({ err });
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62 | return rxjs_1.EMPTY;
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63 | }), (0, operators_1.finalize)(() => scheduleOnNextTick({ isDisposed: true })))
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64 | .subscribe((response) => scheduleOnNextTick({ response }));
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65 | }
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66 | async handleEvent(pattern, packet, context) {
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67 | const handler = this.getHandlerByPattern(pattern);
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68 | if (!handler) {
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69 | return this.logger.error(`${constants_1.NO_EVENT_HANDLER} Event pattern: ${JSON.stringify(pattern)}.`);
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70 | }
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71 | const resultOrStream = await handler(packet.data, context);
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72 | if ((0, rxjs_1.isObservable)(resultOrStream)) {
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73 | const connectableSource = (0, rxjs_1.connectable)(resultOrStream, {
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74 | connector: () => new rxjs_1.Subject(),
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75 | resetOnDisconnect: false,
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76 | });
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77 | connectableSource.connect();
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78 | }
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79 | }
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80 | transformToObservable(resultOrDeferred) {
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81 | if (resultOrDeferred instanceof Promise) {
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82 | return (0, rxjs_1.from)(resultOrDeferred);
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83 | }
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84 | if ((0, rxjs_1.isObservable)(resultOrDeferred)) {
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85 | return resultOrDeferred;
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86 | }
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87 | return (0, rxjs_1.of)(resultOrDeferred);
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88 | }
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89 | getOptionsProp(obj, prop, defaultValue = undefined) {
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90 | return obj && prop in obj ? obj[prop] : defaultValue;
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91 | }
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92 | handleError(error) {
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93 | this.logger.error(error);
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94 | }
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95 | loadPackage(name, ctx, loader) {
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96 | return (0, load_package_util_1.loadPackage)(name, ctx, loader);
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97 | }
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98 | initializeSerializer(options) {
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99 | this.serializer =
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100 | (options &&
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101 | options.serializer) ||
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102 | new identity_serializer_1.IdentitySerializer();
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103 | }
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104 | initializeDeserializer(options) {
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105 | this.deserializer =
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106 | (options &&
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107 | options.deserializer) ||
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108 | new incoming_request_deserializer_1.IncomingRequestDeserializer();
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109 | }
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110 | |
111 |
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112 |
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113 |
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114 |
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115 |
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116 | getRouteFromPattern(pattern) {
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117 | let validPattern;
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118 | try {
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119 | validPattern = JSON.parse(pattern);
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120 | }
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121 | catch (error) {
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122 |
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123 | validPattern = pattern;
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124 | }
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125 | return this.normalizePattern(validPattern);
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126 | }
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127 | normalizePattern(pattern) {
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128 | return (0, utils_1.transformPatternToRoute)(pattern);
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129 | }
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130 | }
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131 | exports.Server = Server;
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