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Image caching in JEE

 
Greenhorn
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Hi,

Going through the JBoss ticket-monster tutorial I've stumbled upon MediaManager class that is responsible for caching images served to the user.
I thought that we shouldn't directly manipulate files on the filesystem in JEE, am I correct? If yes, what would be the best way to implement such functionality?
I'm also not sure about the scope being used - does @RequestScoped make sense as the cache will be rebuilt on every HTTP request-response cycle (which kinda defeats the purpose for me)?

Best,
Maciek
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