Regsrding the use of singleton method in our assignment.....

[Devu Shah]

hi everybody,
i have one confusing question.
I know what is an Singleton pattern.
But I want to know where do we implement it in our assignment.?
If we are not using it what difference does it make in the apllication working.
(Why i am asking... is because, already methods are syncronised and also we all are implementing lock-unlock mechnism ...then what would be specieal function of Singleton? )
Please explain me if i am wrong some where.

[Rick Fortier]

The singleton pattern is when you want to make sure that you only have one copy of something. So if you are trying to maintain a list of current locks on the database, then that would be a good place to use it. You dont want each thread to create its own copy of the locks do you?
Then you must synchronize the collection you are using. I used as HashMap to keep the list of current locks.
locks = Collections.synchronizedMap(new HashMap());