加载Resty-GWT

时间:2017-02-19 13:35:27

标签: gwt resty-gwt

当客户端在服务器上发送json时,如何显示加载小部件。

从GWTP例子中的例子我发现了这样的方法

/**
* We display a short lock message whenever navigation is in progress.
*
* @param event The {@link LockInteractionEvent}.
*/
@ProxyEvent
public void onLockInteraction(LockInteractionEvent event) {
getView().setLoading(event.shouldLock());
}

如何在加载resty-gwt时显示何时发送请求?我可以将 onLockInteraction 与resty-gwt一起使用吗?

1 个答案:

答案 0 :(得分:1)

您可以使用RestyGWT自定义Dispatcher来跟踪请求生命周期。可以手动配置Dispatcher,也可以使用注释(https://resty-gwt.github.io/documentation/restygwt-user-guide.html)配置Dispatcher。手动设置示例:

RootRestService rest = GWT.create(RootRestService.class);
((RestServiceProxy) rest).setDispatcher(new DefaultDispatcher() {
    @Override public Request send(Method m, RequestBuilder rb) throws RequestException {
        RequestCallback callback = rb.getCallback();
        rb.setCallback(new RequestCallback() {
            @Override public void onResponseReceived(Request req, Response res) {
                log.info("request success (stop event)");
                callback.onResponseReceived(req, res);
            }
            @Override public void onError(Request req, Throwable ex) {
                log.info("request error (stop event)");
                callback.onError(req, ex);
            }
        });
        try {
            log.info("request initialized (start event)");
            return request = super.send(m, rb);
        } finally {
            log.info("request fail to initialize error (stop event)");
        }
    }
});

您可以使用eventBus发送事件,而不是记录日志,并使用此事件来跟踪活动请求的数量,如果活动请求的数量大于0,则最后显示加载指示符。