Latest Tutorials| Questions and Answers|Ask Questions?|Site Map



Login         

View Questions and Answers by Category

Advertisements


 
Have Programming Question? Ask it here!
 
 
 


krishnarao
java
1 Answer(s)      6 years and 2 months ago
Posted in : WebSevices



Advertisement
View Answers

September 18, 2008 at 6:07 PM


Hi friend,

Difference between WebServer and Application Server

WebServer

*) It serves pages for viewing in web browser.
*) It exclusively handles http requests.
*) It delegation model is fairly simple,when the request comes into the webserver,
*) It may not support transactions and database connection pooling.
*) It doesn't support EJB's.
*) Examples of Webserver are TOMAT ;
*) It Contains handlers for handling static content like html,images, scripts.



Application Server

*)It provides exposes business logic for client applications through various protocols
*)It serves bussiness logic to application programs through any number of protocols.
*)It is more capable of dynamic behaviour than webserver.
*)It supports EJB's.
*)It provides load balancing , Transaction , more security .
*)Examples of AppServer are WEBLOGIC, WEBSPHERE.
*)It contains handlers for handling the requests to servlets, jsps i.e dynamic content,
it also contains container for EJBs.
*)It is very costly compared to the web-servers.


Implicit Objects in JSP are objects that are automatically available in JSP.
These objects are called implicit objects because they are automatically instantiated.

There are many implicit objects available. Some of them are:

request: The requested object is used to take the value from client?s web browser and pass it to the server.


response: The object response is of type Javax.servlet.http. >httpservletresponse.
The response object is also used with HTTP Headers.

Session: Session Objects is for maintaining states when there are multiple page requests.


Out: The Out object is written: Javax.servlet.jsp.JspWriter

PageContext: This is used to access page attributes and also to access all the namespaces associated with a JSP page.
The class or the interface name of the object PageContext is jsp.pageContext.
The object PageContext is written: Javax.servlet.jsp.pagecontext

Application: This is used to share the data with all application pages.


Config: This is used to get information regarding the Servlet configuration, stored in the Config object.


Page: The Page object denotes the JSP page, used for calling any instance of a Page's servlet.

Thanks






Related Tutorials/Questions & Answers:
java
java  diff bt core java and java
java
java  what is java
Advertisements
java
java  different between java & core java
java
java  explain technologies are used in java now days and structure java
java
java   why iterator in java if we for loop
Java
Java   Whether Java is pure object oriented Language
JAVA
JAVA  how the name came for java language as "JAVA
java
java  what is java reflection
java
java  is java open source
java
what is the size of array in java ?  what is the size of array in java ? what is the mean of finalize in java
java
java   in java does not pointers concept but what is nullpointers in java?   nullpointer is a runtime Exception
Java
Java  how to draw class diagrams in java
java
java  explain object oriented concept in java
Java
Java   Whether Java is Programming Language or it is SOftware
java
java  what are JAVA applications development tools
java
java  why to set classpath in java
java
java  give a simple example for inheritance in java
java
java  Does java allows multiline comments
java
java   What is ?static? keyword
java
java  write a java program using filenotfoundexception
java
java   difference between class and interface
java
java  why multiple inheritance is not possible in java
java
java  is java purely object oriented language
java
java  how use java method
java
java  send me java interview questions
java
java  write a program in java to acess the email
java
java  Write a java code to print "ABABBABCABABBA
java
java  why to set classpath in java
java
java  why to set classpath in java
java
java  why to set classpath in java
java
java  give a simple example for inheritance in java
 

 

 

DMCA.com