Singleton class issue 2004-11-17 - By Kevin Gaasch
Back
Hello Bill,
If your using J2EE, use the Datasource/Connection pooling feature
of your container. Things like concurrency, transaction management,
etc..., are the responsibilty of the container.
Kevin E. Gaasch
Panhandle Plains Student Loan Center
Software Craftsman
Senior Programmer/Analyst
Sun Certified Java Programmer
Work: 806.324.4108
Cell: 806.674.1523
>>> bcai_2003@(protected) 11/17/2004 8:10:46 PM >>>
Hello,
I am developing web application based on j2ee technology:jsp, java bean
and jdbc.
I ceated a singleton class called "JdbcController.java" that takes the
responsibility to establishing connection to DB and works fine. But my
concern is :since this is multi-thread application. every thread will
invoke JDBCController class . i am wondering if this will result in
concurrent issue becase every thread will compete to use this class to
get connection to DB.
one alternative is :i don't use singleton pattern. when every thread
needs to get access to DB, it will ceate new instance of JDBCControoler
object. but it will use lot of memory although JVM has garbage
collection mechanism.
So which way is better according to you guys' experience. Please let me
know.
Thanks
bill
__ ____ ____ ____ ____ ____ ____ ____ ____ ____ __
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com
===========================================================================
To unsubscribe, send email to listserv@(protected) and include in the
body
of the message "signoff J2EE-INTEREST". For general help, send email
to
listserv@(protected) and include in the body of the message "help".
CONFIDENTIALITY NOTICE
The information contained in this message and/ or its attachments may be
privileged and confidential, and is intended only for the use of the individual
(s) named above. If you are not the intended recipient, you are notified that
any dissemination, distribution, or copying of this communication is strictly
prohibited and are requested to delete the message and/or its attachments. If
you have received this communication in error please notify us immediately by
telephone at (806) 324-4100.
Panhandle-Plains Student Loan Center (PPSLC), has taken reasonable precautions
to ensure that any attachment to this e-mail has been scanned for viruses. We
specifically disclaim all liability and will accept no responsibility for any
damage sustained as a result of software viruses. We advise you to carry out
your own virus checks before opening any attachment.
===========================================================================
To unsubscribe, send email to listserv@(protected) and include in the body
of the message "signoff J2EE-INTEREST". For general help, send email to
listserv@(protected) and include in the body of the message "help".
|
|
