Hello ,
my problem is how to call getInstance() and release() when JSP page
object is created or destroyed (it's easy with servlet)
Thanks
Monday, December 06, 1999, 10:32:52 AM, you wrote:
LB> Hi,
LB> I don't know if it can help, but have a look at the code below. It provides
LB> you a way to have a single PersistenceManager on the server and to track the
LB> number of clients
LB> Bertrand
LB> public class PersistenceManager
LB> {
LB> static private PersistenceManager instance;
LB> static private int clients;
LB> private PersistenceManager()
LB> {
LB> init();
LB> }
LB> static synchronized public PersistenceManager getInstance()
LB> {
LB> if (instance == null)
LB> {
LB> instance = new PersistenceManager();
LB> }
LB> clients++;
LB> return instance;
LB> }
LB> ...
LB> public synchronized void release()
LB> {
LB> // Wait until called by the last client
LB> if (--clients != 0)
LB> {
LB> return;
LB> }
LB> ...
>> -----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]
>>
--
Best regards,
heyhey mailto:[EMAIL PROTECTED]
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