GWT 2.4 中客户端上的 RequestFactory 服务继承

发布于 2024-12-04 22:21:24 字数 1446 浏览 0 评论 0原文

GWT 2.4 在客户端引入了服务继承（问题 6234、问题6035）。

我已经等待这个未来很长一段时间了，因为它节省了客户端上的大量重复代码。我已经开始实施它，但成功程度参差不齐。

这是我的代码：

public interface BaseEntityRequest<T>
{
    Request<Void> put(T entity);
    Request<List<T>> getAllOrderBy(String propertyName);
    Request<List<T>> getRangeAndFilter(int limit,int offset, QueryInfoProxy queryInfo);
}

@Service(value = EgdDao.class, locator = DaoServiceLocator.class)
public interface EgdRequest extends RequestContext, BaseEntityRequest<EgdProxy>
{
    Request<Void> exportToExcel(QueryInfoProxy queryInfo, String userName);
}

到目前为止，getAllOrderBy和getRangeAndFilter工作正常，但put(T实体)不行。

我在控制台中收到以下错误：

[ERROR] Unexpected error
java.util.NoSuchElementException

并且在接收器 onFailure ServerFailure 消息中返回此错误：

Error 500 INTERNAL_SERVER_ERROR
HTTP ERROR 500
Problem accessing /gwtRequest. Reason:
INTERNAL_SERVER_ERROR

我可以看到，当其他方法起作用时， put 方法不起作用的唯一原因是它使用通用参数 T。当我在 EgdRequest 接口中移动 put 方法时（使用 EgdProxy 作为参数而不是 T），它开始工作，所以我知道我的服务器代码是美好的。

有人知道如何正确实施吗？

谢谢！

原文

GWT 2.4 brings service inheritance on the client (issue 6234, issue 6035).

I've been waiting for this future for a long time, as it saves a lot of duplicated code on the client. I've started implementing it, but so for with mixed success.

This is my code:

public interface BaseEntityRequest<T>
{
    Request<Void> put(T entity);
    Request<List<T>> getAllOrderBy(String propertyName);
    Request<List<T>> getRangeAndFilter(int limit,int offset, QueryInfoProxy queryInfo);
}

@Service(value = EgdDao.class, locator = DaoServiceLocator.class)
public interface EgdRequest extends RequestContext, BaseEntityRequest<EgdProxy>
{
    Request<Void> exportToExcel(QueryInfoProxy queryInfo, String userName);
}

So far getAllOrderBy and getRangeAndFilter work fine, but put(T entity) does not.

I get the following error in the console:

[ERROR] Unexpected error
java.util.NoSuchElementException

and this gets returned in the receiver onFailure ServerFailure message:

Error 500 INTERNAL_SERVER_ERROR
HTTP ERROR 500
Problem accessing /gwtRequest. Reason:
INTERNAL_SERVER_ERROR

The only cause, that I can see, for the put method not to work, when the others do, is that it uses the generic parameter T. When I move the put method in the EgdRequest interface (using EgdProxy as a parameter instead of T) it starts to work, so I know my server code is fine.

Does anybody have any idea how to implement this correctly?

Thanks!

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