Caching data.

Say that I have a mass of data about each player

Username, UUID, First Login, Server, Credits etc..., And this data isn't really modified often so instead of requesting data that doesn't change often I want to cache it when they join and access that cached data, how would I go about doing that?

 

You could have a runnable periodically saving (runnable tasks) data such as that to a file or just save it a temporary way within the code (using hash maps and such).

EDIT:
But yeah, I would just listen to a join event, and save such information within the code, and later get it.

 

I know that, just.. what is an efficient way of caching it.

 

@WolfMage1
Well, many of the things you said are stored in the Player object, so you could store a reference to that. Just make sure to delete the reference if the player leaves. Caching is probably only useful, if the data is accessed often and you need high performance /low latency there. A simple way would be a HashMap, with a maximum number of entries and maybe decaying based on the last accessed time. This prevents the map from consuming too much memory, if you have bigger objects stored there. I have not much experience with caching systems, but there might be one in the Apache Commons lib bundled with bukkit. You could also try google-ing "java caching system", "java caching data" or similar. Can't help you further though, sorry.

 

sadly a lot of the data I store is not in the player object. But thanks for the help.

EDIT: After doing a bit more surfing I managed to find this on JavaWorld

http://www.javaworld.com/article/20...c-caching-service-to-improve-performance.html (for anyone else who's interested)