如何在运行时更改Java属性？ [英] How to change Java properties at runtime?

问题描述

问题：
是否有某种方法可以连接到正在运行的JVM并更改系统属性（由-Dproperty = value给出）而无需停止JVM并且没有编写方法来执行此操作？

The question: Is there some way to "connect" to a running JVM and change system properties (given by -Dproperty=value) without stopping the JVM and without having programmed a way of doing it?

现在，上下文：
我在远程机器上运行JBoss服务器，它托管我的应用程序，还有其他应用程序。其他应用程序可能无法停止。使用与我的应用程序相关的特定-D属性调用服务器。在服务器启动时为此属性分配了错误的值。我需要改变那个属性。最简单的方法是重启JBoss，但这会导致所有应用程序停机一段时间。有没有办法在不停止任何应用程序的情况下更改该属性，而不是我自己的？

Now, the context: I have a JBoss server running on a remote machine, which is hosting my application, but also other applications. Those other apps may not be stopped. The server is invoked with a specific -D property that is relevant to my application only. This property was assigned the wrong value at server startup. I need to change that property. The easiest way would be to restart JBoss, but that would cause all apps to go down for some time. Is there a way of changing that property without stopping any applications but my own?

谢谢！

推荐答案

在我的一个代码中找到的示例：

Example found in one of my code:

System.setProperty("javax.net.ssl.trustStore", keystore_file); 

您可以运行它以响应重新配置查询（添加重新配置（ ）到您的服务器代码。）

You can run it in response for "reconfigure" query (add reconfigure() to your server code).

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