Win a copy of 97 Things Every Java Programmer Should Know this week in the Java in General forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
  • Campbell Ritchie
  • Paul Clapham
  • Jeanne Boyarsky
  • Junilu Lacar
  • Henry Wong
  • Ron McLeod
  • Devaka Cooray
  • Tim Cooke
Saloon Keepers:
  • Tim Moores
  • Stephan van Hulst
  • Frits Walraven
  • Tim Holloway
  • Carey Brown
  • Piet Souris
  • salvin francis
  • fred rosenberger

Object Caching?

Ranch Hand
Posts: 31
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
What does the line "Object is stored in cache" mean? Can we control caching of objects?
Posts: 10336
Hibernate Eclipse IDE Java
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
It means an instance of an object has been put into some persistent store. This could be, at the simplest level, something as basic as a Collection.

Consider this class:

This just wraps a Collection as a singleton (so we know there is only one instance of the cache in a program that uses it). In this case the object has been cached "in memory".

There are a multitude of cache implementations for different scenarios (for more complex situations have a google for JCS, EHCache, JBossCache JCache etc. ). All are configurable. A typical cache will have methods to specify how long an object can live in a cache before it becomes stale, what to do once the cache becomes full, how to uniquely identify objects in the cache, how often to check the cache for stale objects and so on. They may also include levels of caching, perhaps an in meneory cache with a File based cache that older objects are moved to once the in memory cache becomes full.
Whatever you say buddy! And I believe this tiny ad too:
Try Free Java/.NET Libraries for Word Excel PowerPoint and PDF
    Bookmark Topic Watch Topic
  • New Topic