Hi,
I don't know if it can help, but have a look at the code below. It provides
you a way to have a single PersistenceManager on the server and to track the
number of clients
Bertrand
public class PersistenceManager
{
static private PersistenceManager instance;
static private int clients;
private PersistenceManager()
{
init();
}
static synchronized public PersistenceManager getInstance()
{
if (instance == null)
{
instance = new PersistenceManager();
}
clients++;
return instance;
}
...
public synchronized void release()
{
// Wait until called by the last client
if (--clients != 0)
{
return;
}
...
> -----Original Message-----
> From: heyhey [SMTP:[EMAIL PROTECTED]]
> Sent: Monday, December 06, 1999 11:43 AM
> To: [EMAIL PROTECTED]
> Subject: tracking initialization and destruction of JSP objects
>
> Hello ,
>
> I am developing JSP system that works with some persistent data on the
> server. I don't wont to fix the persistence mechanism - persistence
> engine should be easily replaced with another one (DBManager,
> FileManager, XMLManager) - and my problem is that I don't know how to
> implement the initialization / destruction of the Persistent Manager
> object
>
> the ideal solution would be
> // pseudo JSP page code
> <some code that will be invoked when new JSP object is initialized -
> will initialize the PersistenceEngine or increment a counter>
> <some code that will be invoked when this JSP object is destroyed
> will decrement the counter and destroy the PersistenceEngine if
> counter == 0>
>
> ....
> normal code that handles JSP page request // we know that the
> persistence engine is initialized
> ...
>
> (I have working prototype with Servlets, but generating complex
> dynamic web pages from servlet is ... simple nightmare :(
>
> there is probably some very simple (standard) solution, but I work
> with JSP only for three days ...
>
> Thank you :) and excuse my English.
>
> --
> Best regards,
> heyhey mailto:[EMAIL PROTECTED]
>
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