定期刷新Spring bean实例属性的最佳实践？ [英] refresh Spring bean instance property periodically best practice?

问题描述

我有一个spring组件，它调用AWS来做一些事情。它获取持续时间< = 1h的临时会话凭证，以在我的应用程序开始时初始化AWS服务客户端。 AWS服务客户端被设置为Bean的实例属性。然后，在这小时之后，我需要使用此bean阻塞所有线程，并刷新服务客户端使用的临时会话凭据。

I have a spring component that calls AWS to do some stuff. It acquires temporary session credentials lasting for <=1h to initialize the AWS service client at the start of my app. The AWS service client is set as an instance property of the bean. Then after this hour, I need to block all threads using this bean and refresh the temporary session credentials used by the service client.

有没有建议的方法？任何提示/提示都会被赞赏

Is there any recommended way to do this? Any hints/clues are appreciated

推荐答案

我认为最好将它作为一种实现（也是最简单的）代理。

I think that it would be best (and easiest) for you to implement it as a sort of a proxy.

首先，为要刷新的对象创建一个类。让我们称之为 RefreshableProperty 。

First, create a class for an object that will be refresh. Lets call it RefreshableProperty.

然后，您需要具有以下职责的代理：

Then you need the proxy which will have following responsibilities:

• 它将注入需要访问 RefreshableProperty

<的任何地方li>它将具有类型为 AtomicReference< RefreshableProperty> 的字段的实例

• 它可以具有以<$ c注释的方法$ c> @Scheduled （带有某些cron表达式），将定期调用


• 此方法将连接到您的配置服务器并下载新的设置放入 RefreshableProperty


• 的新实例中，在此操作结束时，您的代码应交换引用，以便指向新对象

• It will be injected into any place that requires access to RefreshableProperty
• It would have an instance of a field of type AtomicReference<RefreshableProperty>
• It can have a method annotated with @Scheduled (with some cron expression) that would be invoked periodically
• This method would connect to your configuration server and download new settings which would be put into a new instance of RefreshableProperty
• At the end of such operation your code should swap the reference so that it points to a new object

如果您需要每小时进行一次，那么这将是一项艰巨的任务，我强烈建议您不要这样做同步此服务将非常棘手客户与您的Spring Application。

If you need to have it being done exactly every hour then it will be a difficult task and I would strongly advise against it since it would be very tricky to synchronize this service client with your Spring Application.

这篇关于定期刷新Spring bean实例属性的最佳实践？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！