0 Replies Latest reply: Aug 1, 2010 6:32 AM by Sanjit Mohanty RSS

How to model data to be stored in JBoss Cache

Sanjit Mohanty Newbie


I understand JBoss cache internally stores data in a map i.e. in a key-value pair.
So, incase i need to search for a data in the cache, i need to pass the key and i can retrieve the value.


But what if, i need to retrieve key based on value!


To clarify more on this, following is an example:


Consider i want to store empId, deptId in JBoss cache.
    empId = unique employee ID
    deptId = department ID. A particular employee can be associated to multiple departments.


I want to do following 2 things:
(1) Get the deptIds based on an empId
(2) Get the empIds based on a deptId


Now, if i make empId as key & store deptId as it's value, then i can achieve (1) without any issues but it will be a problem for (2) because i need to do a full traversal of values, which is in-efficient!


How should i model my data in this scenario?


Thanks In advance!