@nestjstools/messaging/lib/bus/composite-message-bus.factory.js

Simplifies asynchronous and synchronous message handling with support for buses, handlers, channels, and consumers. Build scalable, decoupled applications with ease and reliability.

"use strict";
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
    return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var __metadata = (this && this.__metadata) || function (k, v) {
    if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
var __param = (this && this.__param) || function (paramIndex, decorator) {
    return function (target, key) { decorator(target, key, paramIndex); }
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.CompositeMessageBusFactory = void 0;
const common_1 = require("@nestjs/common");
const core_1 = require("@nestjs/core");
const injectable_1 = require("../dependency-injection/injectable");
const in_memory_channel_1 = require("../channel/in-memory.channel");
const decorator_1 = require("../dependency-injection/decorator");
const messaging_exception_1 = require("../exception/messaging.exception");
let CompositeMessageBusFactory = class CompositeMessageBusFactory {
    constructor(defaultMessageBus, discoveryService) {
        this.defaultMessageBus = defaultMessageBus;
        this.discoveryService = discoveryService;
    }
    create(channel) {
        if (channel instanceof in_memory_channel_1.InMemoryChannel &&
            'default.bus' === channel.config.name) {
            return this.defaultMessageBus;
        }
        const factory = this.discoveryService
            .getProviders()
            .filter((provider) => {
            if (!provider.metatype) {
                return false;
            }
            return Reflect.hasMetadata(decorator_1.MESSAGE_BUS_FACTORY_METADATA, provider.metatype);
        })
            .filter((factory) => Reflect.getMetadata(decorator_1.MESSAGE_BUS_FACTORY_METADATA, factory.metatype)
            .name === channel.constructor.name);
        if (factory.length !== 1) {
            throw new messaging_exception_1.MessagingException(`Unsupported message bus factory for channel ${channel.constructor.name}`);
        }
        return factory[0].instance.create(channel);
    }
};
exports.CompositeMessageBusFactory = CompositeMessageBusFactory;
exports.CompositeMessageBusFactory = CompositeMessageBusFactory = __decorate([
    (0, common_1.Injectable)(),
    __param(0, (0, injectable_1.DefaultMessageBus)()),
    __metadata("design:paramtypes", [Object, core_1.DiscoveryService])
], CompositeMessageBusFactory);
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