GWT RequestFactory和多个请求

Question

有没有办法使用RequestFactory在单个请求中创建两个实体？我试过了：

    EmployeeRequest request = requestFactory.employeeRequest();
    EmployeeProxy newEmployee = request.create(EmployeeProxy.class);
    newEmployee.setName("Joe!");

    Request<Void> createReq = request.persist().using(newEmployee);
    createReq.fire();

    EmployeeProxy newEmployee2 = request.create(EmployeeProxy.class);
    newEmployee2.setName("Sam!");

    Request<Void> createReq2 = request.persist().using(newEmployee2);
    createReq2.fire();

但是我得到一个错误，一个请求已经在进行中。当我创建两个独立的EmployeeRequests时：

    EmployeeRequest request = requestFactory.employeeRequest();
    EmployeeProxy newEmployee = request.create(EmployeeProxy.class);
    newEmployee.setName("Joe!");

    Request<Void> createReq = request.persist().using(newEmployee);
    createReq.fire();

    EmployeeRequest request2 = requestFactory.employeeRequest();
    EmployeeProxy newEmployee2 = request2.create(EmployeeProxy.class);
    newEmployee2.setName("Sam!");

    Request<Void> createReq2 = request2.persist().using(newEmployee2);
    createReq2.fire();

然后从浏览器发出两个单独的请求。我希望RequestFactory中的某些东西可以合并多个请求--我必须一次创建数百个实体，而我不想发出数百个请求！

Answer 1

是的，这是可能的。在第一个示例中，只需删除行

createReq.fire();

当您在最后调用createReq2.fire()时，GWT在一个请求中同时发送newEmployee和newEmployee2 (因为它们都被持久化在EmployeeRequest“request”的上下文中)。我个人觉得语义有点奇怪，但这只是我的观点。

Riley提供的附录:下面的语法是等价的，而且更直观：

    EmployeeRequest request = requestFactory.employeeRequest();
    EmployeeProxy newEmployee = request.create(EmployeeProxy.class);
    newEmployee.setName("Joe!");

    request.persist().using(newEmployee);

    EmployeeProxy newEmployee2 = request.create(EmployeeProxy.class);
    newEmployee2.setName("Sam!");

    request.persist().using(newEmployee2);
    request.fire();