srinivas

• Dec 1st, 2006

All server side programming handle distributed tech (one jvm to another jvm)client staying in one jvm can method of another jvm(server) in another jvm

Raj

• Nov 6th, 2006

Technology which can be accessed among multiple platforms

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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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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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Answered by Jey on 2005-05-08 17:27:45: ACID is releated to transactions. It is an acronyam of Atomic, Consistent, Isolation and Durable. Transaction must following the above four properties to be a better one  Atomic: It means a transaction must execute all or nothing at all. Consistent: Consistency is a transactional characteristic that must be enforced by both the transactional system...

opbehera

 Profile Answers by opbehera Questions by opbehera

• Feb 8th, 2010

A - AtomocityC - ConsistencyI - IsolationD - Durability.When Transactoon(Tx) middleware service is enabled on the Businesslogic the data on the application available outside or in DB s/w&nbs...

Ritesh patni

• Jul 25th, 2005

Atomic-- should execute all or nothing...rollback come into picture Consistent--Consistency is a transactional characteristic that must be enforced by both the transactional system and the applic...

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Bhumika

• Dec 4th, 2006

A Handle represents a portable reference to a remote EJB object, in that it can be serialized, passed across Java VM boundaries, and then used to reconstitute a remote reference to the same EJB object...

Ashok

• Jun 27th, 2005

A handle is an abstraction of a network reference to an EJB object. A handle is intended to be used as a "robust" persistent reference to an EJB object. 

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Answer posted by Mohan on 2005-05-21 17:20:02: Optimistic locking assumes that no one would read or change the data while changes are being by a bean Pessimistic locking would rather lock down the data so that no one can access it

rossbertoloni

 Profile Answers by rossbertoloni Questions by rossbertoloni

• Sep 3rd, 2007

Optimistic LockingIs based on the assumption that it is unlikely that separate users will access the same object simultaneously.  The EJB does not hold a lock for the duration of the transaction,...

John

• May 28th, 2005

In optimistic locking the row will not be locked until the actual update is performed. In order to prevent the lost update issue a version number column will be used. In pessimistic locking the row wi...

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EDESIA

• May 9th, 2006

What is a primary key in tables used in data entry?

Sailaja

• Sep 20th, 2005

Primary key class has to meet the following requirements?         The access control modifier of the class is public. ?       ...

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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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jananianandan

 Profile Answers by jananianandan Questions by jananianandan

• Feb 20th, 2007

design patterns codify and provide developers with a way to recognize common useful techniques.with design patterns , it's important to understand the types of situation that each pattern addresse...

Cos

 Profile Answers by Cos Questions by Cos

• Oct 28th, 2005

A design pattern describes a recurring desing problem and a core solution to it. A design pattern has 4 essential elements: a name, the problem, the solution and consequences. Design patterns can be grouped in 3 major categories: creational, structural, and behavioural.

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we can run any number of JVM's.

Ghulam Abbas Shaabir

• Apr 20th, 2006

hi, keeping in mind the concept of env. variable, JAVA_HOME is globaly defined variable, we assigns class path to this variable, on compilation takes place, only one value can be assigned to a va...

kayalvizhi

• Apr 12th, 2006

How many JVM's we can run in a system? 

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DHARMENDRA

• Apr 1st, 2006

RequestDispatcher is not a class it is an Interface having forward(ServletRequest,ServletResonse) and include(ServletRequest,ServletResonse) methods.

debabrata sau

• Feb 14th, 2006

RequestDispatcher is a class having forward(req,res) & include(req,res) methods

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s_s78

 Profile Answers by s_s78 Questions by s_s78

• Mar 20th, 2006

Session bean has business logic and database operation methods.Entity bean's one feature is to make your application database independent. means if you change database,tables u need not to see code written in your session bean u just need to edit very few line in you entity DD files.

antony

• Jan 14th, 2006

Thanks vemodher.... Good answer

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NovaCarolina

 Profile Answers by NovaCarolina Questions by NovaCarolina

• May 12th, 2010

J2EE app servers give freedom to the developer/ application deployer/ end user from vendor lockin. As far as software development is concerned, such ass servers gives flexibility in choosing between d...

Supraja

• Feb 28th, 2006

Enterprise JavaBeans (EJBs) contain the application's business logic and live business data. Although it is possible to use standard Java objects to contain your business logic and business data, usin...

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ak40732

 Profile Answers by ak40732 Questions by ak40732

• Mar 23rd, 2006

JNDI is a service which is offered by the servers like Weblogic etc.We can make any business or entitiy components which are reusable across different applications to be available to any type of clien...

s_s78

 Profile Answers by s_s78 Questions by s_s78

• Mar 20th, 2006

client must know JNDI name of EJB before looking for it it will go through RMI-IIOP protocol.and lookup is performed by container

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Pardeep Dureja

• Aug 28th, 2006

It is web.xmlthis file contain mapping of ActionServlet with the configuration file for single or multipleinfo about url atternmapping of tag uri with struts tags locationPardeep Dureja

Diptiman Rath

• May 3rd, 2006

In struts-config.xmlWeb Application Deployment Descriptor: web.xml

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James Samuel

• Oct 27th, 2006

Ejb classes or business components are packaged together and called jar files which are part of the business layer in the runtime. These reside on Application Server. Whereas war modules consists of a...

Anuj Kumar Ratra

• Sep 8th, 2006

Deep down all files EAR WAR JAR are zip files just to differentiate their deployment they are grouped with different extensionsJar for Java fileWar for web acrhives jsp and servletsear for ejbs

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Ramesh Chowdary

• Oct 7th, 2006

Roles and responsiblities between to interfaces are diffrent.Home interface is your way to communicate with container , who is responsible to creating ,locating even removing one or more beansRemote interface that will allow you to remotely access to all its methods and members.

jagdish

• Sep 15th, 2006

FjbHome is use for create a reference of EJBObject. EJBObject has a business method. we access a mehod using EJBHome interface.

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surya kumari

• Jan 2nd, 2007

Can u tell me with an example

Ram ji soni

• Dec 7th, 2006

The user can not identified that the bean is stateful or stateless whenever he would not see the web.xml file, there s only one entry in ds file dat d bean is srateul or stateless.Main Difference:Stat...

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lhariPrasad

 Profile Answers by lhariPrasad Questions by lhariPrasad

• Dec 8th, 2006

see ejb-jar.xml and weblogic-ejb-jar.xml, which defines the deployment descriptor's.

srinivas

• Dec 1st, 2006

Ejb componenets r deployed with the help of xml files (we have to tell the components to the container in form of xml files) container can understand the components

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santh kumar

 Profile Answers by santh kumar Questions by santh kumar

• Feb 1st, 2007

The "reentrant " element dictates whether our bean can call itself through another bean.For exmple, take two beans are there in EJB container named "beanA" and "beanB".There is an element " True " ...

sennee

• Jan 29th, 2007

The term reentrant is the word you can find in Deployment Descriptors. when a bean is executing a client request in a given tranaction context and another request with the same transaction context arr...

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