Vaadin @Javascript：清除更新的JS文件的缓存 [英] Vaadin @Javascript : clear cache for updated JS file

问题描述

我的应用程序中有一个@JavaScript注释，用于从类路径加载.js文件。

I have a @JavaScript annotation in my application to load a .js file from the classpath.

现在我对文件进行了更新并重新部署（本地），但我总是得到旧版本。我已经尝试重新加载所有内容（ctrl + R，ctrl + F5），但这不起作用，我也不希望用户必须这样做。

Now I've made an update to the file and redeployed (locally), but I always get the old version back. I've tried reloading everything (ctrl+R, ctrl+F5) but that doesn't work and also I wouldn't want the users to have to do that.

我过去使用的一个技巧（没有Vaadin）是附加一个带有版本的请求参数（例如？version = 1）并更新它以便URL发生变化。但显然@FavaScript注释不允许这样做（Vaadin甚至不尝试加载文件）。

A trick I used in the past (without Vaadin) was to append a request parameter with the version (e.g. ?version=1) and update that so that the URL changes. But apparently that isn't allowed for the @JavaScript annotation (Vaadin doesn't even try to load the file).

推荐答案

我已经通过使用Vaadin servlet配置的 resourceCacheTime 参数克服了这个问题：

I have overcome this by utilizing the resourceCacheTime parameter of the Vaadin servlet configuration:

@VaadinServletConfiguration(ui = MyUI.class, resourceCacheTime = 0)

虽然它有其限制，如我对此处的另一个问题的回答中所述。

Although it has its limitation as described in my answer to another question here.

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