nestjs-eureka/dist/discovery/discovery.service.js

A NestJS module that integrate eureka-js-client

"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 DiscoveryService_1;
Object.defineProperty(exports, "__esModule", { value: true });
exports.DiscoveryService = void 0;
const common_1 = require("@nestjs/common");
const util_1 = require("util");
const eureka_js_client_1 = require("eureka-js-client");
const _ = require("lodash");
let DiscoveryService = DiscoveryService_1 = class DiscoveryService {
    constructor(client) {
        this.client = client;
        this.logger = new common_1.Logger(DiscoveryService_1.name);
    }
    resolveHostname(serviceName) {
        if (this.client) {
            const instance = this.getAvailableInstance(serviceName);
            if (instance) {
                this.logger.debug(`Found an instance of ${serviceName} in eureka`);
                const host = instance.hostName;
                const port = this.getPort(instance);
                return { host, port };
            }
            this.logger.debug(`no instance of ${serviceName} found in eureka`);
        }
        return null;
    }
    getPort(instance) {
        if ((0, util_1.isNumber)(instance.port)) {
            return instance.port;
        }
        else if (instance.port.hasOwnProperty('enabled') && instance.port.enabled) {
            return instance.port.port;
        }
        else if (instance.port.hasOwnProperty('@enabled') &&
            instance.port['@enabled']) {
            return instance.port.$;
        }
        return 0;
    }
    getAvailableInstance(serviceName) {
        const instances = this.client.getInstancesByAppId(serviceName);
        if (instances && instances.length > 0) {
            return _.find(instances, i => i.status === 'UP');
        }
        return undefined;
    }
};
DiscoveryService = DiscoveryService_1 = __decorate([
    (0, common_1.Injectable)(),
    __metadata("design:paramtypes", [eureka_js_client_1.Eureka])
], DiscoveryService);
exports.DiscoveryService = DiscoveryService;
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