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whatis the diff between ejb and servlet/jsp
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Answer / guest
EJB used as persistant layer.
JSP used for presentation layer.
Servlet we can use as controller.
| Is This Answer Correct ? | 20 Yes | 6 No |
Answer / shilpa kapurkar
EJB is a distributed component model for developing
secure,scalable, Transactional and multi user component.
EJBs are reusable software units containing business logic.
EJBs allow separation of application logic from system-level
services thus, allowing the developer to concentrate on the
business logic.EJBs reside in EJB container. needs
Application server.
Servlets are serverside components involved in request
response process. JSP- Java server Pages an extension to
servlet technology. JSPs are text based documents involved
in request response process. at run time JSPs are converted
into servlets. servlets , JSPs resides in web container. one
can use JSPs for presentation, controller as a servlet and
business components can be easily managed as EJBS.
| Is This Answer Correct ? | 8 Yes | 2 No |
Answer / afzal
In ejb u hv many inbult feature like "Transaction
Management", "Security Management" etc. U just hv to call
those function for managing all this thing. All the things
r managed by/depends on application server.
In Servlet/JSP for Implementing all this thing 1 has to
write complex codes.
Important using EJB in small application is tradeoff.
| Is This Answer Correct ? | 5 Yes | 2 No |
Answer / anitha
a)EJB Applications run on only Application Servers.
Servlet/jsp's run on web/application servers.
b)Ejbs allows Remote Accessing.
Servlet/jsp's does not allow remote accessing
c)Ejbs mainly usefull for implementing Business Logic(Model
classes)
Servlet's/jsp's are usefull for impementing View and
Controller layers.
| Is This Answer Correct ? | 5 Yes | 2 No |
Answer / surima jain
Servlet - A class inherited from HttpServlet which receives
the http requests and generate the response of forward the
request to another servlet or jsp page.
EJB - a class(object) which exists on a j2ee server and can
be accessed remote(from another JVM).
| Is This Answer Correct ? | 2 Yes | 1 No |
Ejb is a EJBCntainer. servlet and jsp are webcontainer.
Ejb is business logic . servlet and jsp are presentation logic.
| Is This Answer Correct ? | 11 Yes | 12 No |
What transaction attributes does Java Bean containers support?
can u explain about design patterns like singleton,builder,factory
in EJB diclare the static methods are not?
What’s the difference between hibernate and ejb 3? Don’t you think ejb 3 is just a clone of hibernate?
What are the design goals of EJB architecture?
How can enterprise javabeans be accessed from active server pages?
What are the various types of entrepreneur java bean?
Why stateless is better than stateful?
What is use of @postconstruct?
In my project iam integrating telephone line using some bridge. To connect my project to that telephone line they have give some jar file. Using dat i connected with that.. To handle that event like call attented, call disposed and idle time they have give one event listener class.. I did every thing and this class is alsoo called when a particular event is fired. The only thing is i wanna call EJB from that event listener method.. But the EJB is not getting initated and exception is thrown. This below shownn error is occured only i try to call it from this event listener class. In other places EJB calling is working fine.. javax.naming.NoInitialContextException: Cannot instantiate class: org.jnp.interfaces.NamingContextFactory [Root exception is java.lang.ClassNotFoundException: org/jnp/interfaces/NamingContextFactory] at javax.naming.spi.NamingManager.getInitialContext (NamingManager.java:657) at javax.naming.InitialContext.getDefaultInitCtx (InitialContext.java:247) at javax.naming.InitialContext.init(InitialContext.java:223) at javax.naming.InitialContext.<init> (InitialContext.java:197) at com.kgisl.etrac.desk.servicelocator.ServiceLocator.getInitia lContext(ServiceLocator.java:82) at com.kgisl.etrac.commonUtils.EventListener.getAdministrationE JBRemote(EventListener.java:206) at com.kgisl.etrac.commonUtils.EventListener.CallDispositioned (EventListener.java:65) Caused by: java.lang.ClassNotFoundException: org/jnp/interfaces/NamingContextFactory at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:242) at com.sun.naming.internal.VersionHelper12.loadClass (VersionHelper12.java:42) at javax.naming.spi.NamingManager.getInitialContext (NamingManager.java:654) ... 6 more javax.naming.NoInitialContextException: Cannot instantiate class: org.jnp.interfaces.NamingContextFactory [Root exception is java.lang.ClassNotFoundException: org/jnp/interfaces/NamingContextFactory] at javax.naming.spi.NamingManager.getInitialContext (NamingManager.java:657) at javax.naming.InitialContext.getDefaultInitCtx (InitialContext.java:247) at javax.naming.InitialContext.init(InitialContext.java:223) at javax.naming.InitialContext.<init> (InitialContext.java:197) at com.kgisl.etrac.desk.servicelocator.ServiceLocator.getInitia lContext(ServiceLocator.java:82) at com.kgisl.etrac.commonUtils.EventListener.getAdministrationE JBRemote(EventListener.java:206) at com.kgisl.etrac.commonUtils.EventListener.CallDispositioned (EventListener.java:65) Caused by: java.lang.ClassNotFoundException: org/jnp/interfaces/NamingContextFactory at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:242) at com.sun.naming.internal.VersionHelper12.loadClass (VersionHelper12.java:42) at javax.naming.spi.NamingManager.getInitialContext (NamingManager.java:654) ... 6 more It would be more help full if i get the solution 10x in advance balaji
Which services are provided to ejb components by the ejb container?
A client wants to preserve the reference to the ejbhome object of an enterprise bean instance and use it later. Which of the following can be serialized for this purpose?
Core Java 
