Ravi Biradar

• Dec 23rd, 2005

Member variables are used for this purpose.

Vijii

 Profile Answers by Vijii Questions by Vijii

• Dec 22nd, 2005

Passivation is used by container to move beans to storage based on least recently used algorithm.It is not used for maintaining client state.Hence the member variables are used for that purpose.

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D

Vijii

 Profile Answers by Vijii Questions by Vijii

• Dec 22nd, 2005

Stateful sessions beans maintain their state within the EJB layer itself.It is taken care of by the container,whereas the Web Layer maintains its state using cookies or HttpSession object.

srikanth

• Oct 27th, 2005

statefulsession beans maintains their state by using session id which can be stored in server side and client side using cookies.next time client interact with application with using of session id bean state is coming back from .ser file and services the client

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Dinesh

• Nov 19th, 2005

Servlet is used to exceute on the webbased,which is used to seperate the Dynamic and static Content.It acts as a Controller in MVC .JSP is a Presentation Layer.Which has the Dynamic Html it embedded with java code.Its use to mix both Dynamic and Static content

Dharmendra singh

• Nov 18th, 2005

jsp is the server side programme where the java code can embeded into the html tag. whereas servlet is pure java class where the entirehtml page can be genrated

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Chris Thompson

• Sep 18th, 2005

The primary key is the only way the container has of distinguishing one bean from another. This is particularly important for pooling, where the container uses the primary key to determine if the dat...

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Answered by Jey on 2005-05-08 12:33:35: If Client and EJB classes are in the same machine ( Same JVM) then we can use Local linterface instead of Remote interface. Since Client and EJB are in same JVM, values are passed by referance.

kasturi

• Nov 17th, 2005

Local interface is when the client and the ejb are colocated in a same jvm.Here the client is another EJB.In case of Local interface there is no need of throwing RemoteException rather it throws EJB Exception which is a subclass of Runtime Exception.so u may not catch tis exception.

Sowmy

• Sep 20th, 2005

Performance is upgraded when using a local interface because there are no RMI/IIOP network calls hence reducing the overhead.

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veera kumar vangara

• Nov 14th, 2005

For each  bean we can specify ejb-object, ejb-interface,ejb-home object,ejb-home interface.

Venkata Subbarao Bathula

• Jul 22nd, 2005

Only one Object Created for a bean.

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Mannu Kumar Pandey

• Nov 3rd, 2005

Here also we can write a complex query(complex select and find method) in our containen managed entity bean.

suman medisetti

• Oct 10th, 2005

Ejb query language is a new feature established in EJB2.0 it is based on SQL-92 standard specification,it is used for writing the queries for finder and select methods.

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Vijay

• Nov 1st, 2005

Hi All,The stateless bean is used whereever the logic does the same for all client irrespective of remembering the client state.For Example, Consider a simple EJB Client which just converts dollar to ...

Sree Ranganath

• Oct 26th, 2005

I  dont  think that St less bean is  used in this scenario  (ie.,   Credit card processing ) coz there it is a must that we have to remember the client.

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Jignesh

 Profile Answers by Jignesh Questions by Jignesh

• Oct 31st, 2005

First of all the question is not very clear and specific. But I hope this helps:You call create() method of the home object which in turn calls the ejbCreate() of the bean and as you mentioned that th...

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Absolutely yes, but the way to do that depends on the Exception, since there are no standards for that. Some examples: ·When you have an javax.ejb.EJBException, you can use the getCausedByException() that returns a java.lang.Exception. ·A java.rmi.RemoteException there is a public field called detail of type java.lang.Throwable ·With a java.sql.SQLException you need to use the method getNextException()...

manoj b raut

• Oct 26th, 2005

100% depends upon the mode of execution .

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John

• May 3rd, 2005

We can describe the following common rules for choosing whether to use remote client view or local client view:  When you will potentially use a distributed environment (if your enterprise b...

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Answer posted by Mohan on 2005-05-20 08:44:39: SessionBeans typically are used to represent a client they are of two typse  Stateful Session Beans : they maintain conversational state between subsequest calls by a client  Stateless Session Bean : consider this as a servlet equivalent in EJB. It is just used to service clients regardless of state and does not maintain any state....

Balakrishnan

• Oct 17th, 2005

Session bean is encapsulates the business logic. and carry out the task for behalf of the client. It have two types.one is stateful session bean. this is maintain the convesional state.another one is stateless session bean. donot maintain the conversional.state.

Chandana Ekanayake

• Oct 14th, 2005

 Ok,If you want to find the inverse of a Matrix then We can use session been encapsulated the logic of finding inverse of a matrix, is an example for stateless session been.&n...

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Answered by Jey on 2005-05-08 12:51:03: EJB 2.0 adds the local beans, which are accessible only from within the JVM where beans are running in.  In EJB 1.1, we had to implement remote client views for all these beans, even if we had no remote clients.

suman medisetti

• Oct 10th, 2005

EJB 2.0 came with new features which not available in EJB1.1 they are auto primarykey generation,EJB-query language,local interfaces,relationships.

Srinivas Jadcharla

• Jul 17th, 2005

some more features along with Local beans    1.message driven beans  2.Support for EJB Query language    3.New CMP Model. It is based on a new contract called the abstract per...

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Answered by Nikhil on 2005-05-11 11:28:14: Lazy loading is a characteristic of an application when the actual loading and instantiation of a class is delayed until the point just before the instance is actually used. The goal is to only dedicate memory resources when necessary by only loading and instantiating an object at the point when it is absolutely needed.  Tools such as Eclipse have...

catura_ashish

 Profile Answers by catura_ashish Questions by catura_ashish

• Oct 6th, 2005

In Lazy loading, you load the child data as and when required.Example:public class OrderBean implements EntityBean {        private long orderId;   &n...

Nikhil

• May 11th, 2005

Lazy loading is a characteristic of an application when the actual loading and instantiation of a class is delayed until the point just before the instance is actually used. The goal is to only dedica...

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Rajnish Sasmal

• Sep 27th, 2005

You can use two methods like insertRow() and deleteRow() of ejbCreate() for insert and delete the data from the data base in entity Bean.

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Ravi Dalal

• Sep 19th, 2005

stateful beans maintains their state through instance variables. the values of the instance variables is specific to client. when the bean instance needs to be removed from the pool (usually LRU repla...

Srinivas Jadcharla

• Jul 18th, 2005

A stateful session bean is an enterprise bean (EJB component) that acts as a server-side extension of the client that uses it. The stateful session bean is created by a client and will work for only t...

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Saket

• Sep 14th, 2005

Its possible to map more than one tables to a CMP. Have a look athttp://e-docs.bea.com/wls/docs81/faq/ejb.html#260273

Srinivas Jadcharla

• Jul 18th, 2005

No

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Partha Mandal

• Sep 14th, 2005

Interface is mainly used to seperate the server side business logic from the client. Because interface contains only the method defination which is getting exposed to the client. Hence if one modifies...

Manoj Singh

• Jul 25th, 2005

The Main use of interface in java is to implements the concept of Multiple Inheritence.

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Sumit Kumar

• Aug 30th, 2005

A Bean persists by having its properties, fields, and state information saved and restored to and from storage. The mechanism that makes persistence possible is called serialization. When a Bean insta...

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sri

• Aug 4th, 2005

We can call java beans by using jsp:useBean tag

Manoj Singh

• Jul 25th, 2005

Yes We can call java beans in Java

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