share an instance but create new one for every new process

[anjan singh]

here is my problem--

I have 4 classes - Starter , Database and Scheduler and a Test class.

Test class will create a new instance of Starter (which loads and starts the entire process). Starter initializes Scheduler and Database classes.

Test class passes a data to Starter. Starter stores it in a HashMap in Database class. Scheduler reads the same HashMap from Database class.

Now to ensure that the exact same HashMap is access by all classes throughout my java project, I have 2 options-- to make HashMap static or to make Database a singleton class. I have made Database a singleton class for now.

The problem-- if Test class does this

Starter starterInstance1 = new Starter();

Starter starterInstance2 = new Starter();

how do i ensure starterInstance1 and starterInstance2 have their own instance of Database class or the HashMap?

[Darryl Burke]

Anjan, welcome to the Ranch! We don't have too many rules here, but we do ask that you BeForthrightWhenCrossPostingToOtherSites
http://stackoverflow.com/questions/9139588/share-an-instance-but-create-new-one-for-every-new-process