Reinitialization of spring bean during runtime?

Question

I have a problem ."This is just a configuration which I would like to manage during runtime. I don't want to redeploy whole app to update configuration".I am reading some values from the property files.How can i acheive this?

Answer 1

There are lots of possible solutions, depending on the exact need (and this like possibility to reload these properties on demand etc.).

The simplest one seems to be this one:

• Create a bean that internally has a cache defined (like Guava Cache)
• Set certain TTL for the cache contents (this will cause your properties to be reloaded every TTL seconds)
• Provide a way to populate the cache
• Optionally provide a way to force refresh of cache contents

As for the last point I cannot give you a way to do this because I know nothing of your project, but there are at least few good options here depending on the project you are working on.

Answer 2

Assuming your file is not part of deployable (WAR/EAR/JAR), you can watch for directory changes and identify whether your file has changed (refer Can I watch for single file change with WatchService (not the whole directory)?). Once you notice the file has changed, you can execute your logic.