使用单例httpserver和orm的tsyringe

问题描述

你好，我有一个关于单针筒和性能的问题， 我启动了mikro orm并进行表达时遵循以下逻辑，但是我有以下问题： 将我的orm / http服务器保留为单例是一个会影响性能的选项，这是不正确的吗？

引导应用程序：

export interface BootStrapContainer {
  HttpServer: IHttpServer;
  DatabaSEOrm:IDatabaSEORM
}
@singleton()
export class BootstrapApplication {
  constructor(@inject(ExpressServer) private HttpServer: IHttpServer,@inject(MikroOrmClient) private DatabaSEOrm: IDatabaSEORM) {
  }
  public start = async () => {
    console.log(chalk.yellow(`Starting Http Server`))
    await this.HttpServer.start();
    console.log(chalk.yellow(`Http Server started successfully`))
    console.log(chalk.yellow(`Starting Database`))
    await this.DatabaSEOrm.start();
    console.log(chalk.yellow(`Database started successfully`))
  };
}

orm：

@singleton()
export class MikroOrmClient implements IDatabaSEORM{
  private connection: MikroORM<IDatabaseDriver<Connection>>;
  constructor(@inject("OrmConfig") private options: Options){
  }
  public getConnection = ():MikroORM<IDatabaseDriver<Connection>> => {
    return this.connection;
  };
  public close(): void {
    if(!this.connection) return
    this.connection.close()
  }
  public getEntityManager() {
    return this.connection.em.fork()
  }
  public start = async () => {
    try {
      this.connection = await MikroORM.init(this.options)
      const migrator = await this.connection.getMigrator();
      const migrations = await migrator.getPendingMigrations();
      if (!(migrations && migrations.length > 0)) return;
      await migrator.up();
    } catch (error) {
      process.stdout.write(
        chalk.redBright(`${(error as Error).message}\n`)
      );
    }
  };
}

httpServer：

@singleton()
export class ExpressServer implements IHttpServer {
  private server: express.Application;
  constructor() {
    this.server = express();
  }
  private initializeRouter = () => {
    this.server.get('/favico.ico',(req,res) => {
      res.sendStatus(404);
    });
    this.server.get('/',res) => {
      res.send('Welcome');
    });
  };
  private initializeErrorHandling() {
    this.server.use(ErrorMiddleware);
  }
  private initializeMiddlewares = () => {
    this.server.use(cors());
    this.server.use(express.json());
    this.server.use(bodyParser.json());
    this.server.use(cookieParser());
  };
  public getServer = () => {
    return this.server;
  };
  public start = async () => {
    this.initializeMiddlewares();
    this.initializeRouter();
    this.initializeErrorHandling();
    this.server.listen(3000,() => {
      console.log('this server is ready on port 3000');
    });
  };
  public stop = (): void => {
    throw new Error('Method not implemented.');
  };
}

解决方法

暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！

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