CODEWITHSUNDEEP
tomcatconfigurationproperties
Pinchy
Pinchy

Reputation: 1536

Recognizing properties file changes without restarting Tomcat

Is there any way for the server to recognize the changes without restarting after a properties file updated? Because it causes Java.lang.OutOfMemoryError: PermGen space after the second restart.

The properties file is under Web-Inf folder.

Cheers...

Upvotes: 10

Views: 19356

Answers (4)

ricosrealm
ricosrealm

Reputation: 1636

Take a look at Tomcat Context/WatchedResources.

<Context reloadable="true"> <WatchedResource>path/to/watched/resource</WatchedResource> </Context>

http://www.mulesoft.com/tomcat-reload#context

Upvotes: 3

Michael-O
Michael-O

Reputation: 18430

There is no direct way!

The Tomcat Webapp Classloader caches every resource which has been loaded by it. A change won't be visible unless you restart the context. There is no API clearing that cache. All you can do is access that map via reflection and call the clear method. All resources will be re-read from disk on request. Clear this HashMap and your are done! The file monitor won't really help since you have a custom classloader.

Upvotes: 8

anubhava
anubhava

Reputation: 784908

If you're not yet using JDK 7 then I would suggest using a File Monitor like this to monitor changes to your property file and when it changes just rel-read the property file into your Properties object.

Upvotes: 1

mindas
mindas

Reputation: 26703

If you're on JDK 7, you can watch the file system for changes and reload the file when necessary.

Upvotes: 2

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