How can i increase performance JSP with database?

Question

Hi,
I am working a forum.
I have been facing a problem.
i am getting collection of records from sql server database to jsp page. here all the records to take long time (*delayness jsp with database*).
plz any bodies know that increase the permance, tell me.
thanks & regards,
k.s.kumar

Answer 1

again very bad idea never use Put DB Code or Business Logic or Special Service requests inside the servlets/backing beans.
Ideally the below is the method which is recommended for a Peformant J2EE application which focuses at modulality,configurablity,scalablity & performance.
http://java.sun.com/blueprints/corej2eepatterns/Patterns/index.html
Anyways,it might be a costly in terms of investment.Ideally i personally fell the below way/patterm could be comparable.
<!-- View / Presentation Layer -->
STEP 1 --> VIEW RENDERED(JSP renders view using a View Object/Objects)
STEP 2 --> USER (Fills Forms accordingly and request for an action)
<!-- Controller part -->
STEP 3 --> Controller(Servlet+Backing Bean)
STEP 3.1 ---> Mapps the request made into a View Object & Scopes it (Done by servlet )
STEP 3.2 ---> validation of the data in the VO (and servlet is responsible to find appropriate Backing Bean to pass on the respective View Object)
STEP 3.3 ----> Backing Bean takes help of a ServiceLocator Object(Singleton Object) and gets appropriate Business Object which takes care of all the appropriate business rule(Managed by Specific Containers)
<!-- Service Locator takes help of specific Stubs to provide access to specific business Object -->
<!-- MODEL PART -->
STEP 3.4 ---->Backing bean passes on respective View Object to the Business Object and Business Object apply business rule on the data recievd from the Backing bean and sends appropriate DTO to DAO Object(Singleton Object)
STEP 3.5 ----> DAO executes responsible DB query and returns a DTO/Collection of DTO to Business Object.
STEP 3.6 ----> Business Object apply business rules on the data and then passes it back to backing bean.
STEP 3.7 -----> Backing Bean receievs appropriate DTO/Collection of DTO sent by Business Object Update the View Object Accordingly.
STEP 3.8 -----> Depending on the results return by Business Object the backing bean returns to reference appropriate JSP to forward/redirect.
STEP 3.9 -----> Servlet identifies the reference returned and forward/redirects accordingly.
STEP 4 ---> Repeat STEP 1
NOTE: One can make use of any builtin frameworks(like struts,JSF,tapestry,Spring MVC,etc or your custom built framework in VC layers, EJB or Spring IoC or Custom Built Component Layer handling business objects and any ORM like hibernate,Oracle Toplink,Ibatis,JDO,JPA or specific custom devoloped DAO layer) to do this job.
Might Sound bit complicated but is a better way to plug & play with each layer and can enusure other layer is not distrubed because of change in one layer,distributes the load on respective layer & so on.
Hope that sounds logical
REGARDS,
RaHuL