What are EJB transactions?

Table of Contents

EJB Container/Servers are transaction servers and handles transactions context propagation and distributed transactions. Transactions can be managed by the container or by custom code handling in bean’s code. Container Managed Transactions − In this type, the container manages the transaction states.

Does anyone still use EJB?

EJB is still there and growing up. There are many new features (SOAP/RESTful webservice, JPA entities, JAXB…)

Which of the following is not a property of EJB transaction?

D Distributed is not a property of EJB transaction.

Which of the following is correct about a transaction in ejb?

Q 5 – Which of the following is correct about a Durable transaction in EJB? A – If any of work item fails, the complete unit is considered failed. Success meant all items executes successfully.

What is the default transaction attribute to a method in an EJB?

Yes, CONTAINER and REQUIRED are the default.

What are transactional attributes?

A transaction attribute controls the scope of a transaction. Figure 27–1 illustrates why controlling the scope is important. In the diagram, method-A begins a transaction and then invokes method-B of Bean-2 .

Why is EJB bad?

The biggest complaint I have against the EJB specification is its rather heavy weight programming model, which makes it difficult to decide on the granularity of the beans. Another reason why you wouldn’t want your bean to implement your Remote Interface is that the remote interface extends EJBObject.

Which of the following is correct about a transaction in EJB?

What are types of EJB?

There are three types of EJBs: session beans, entity beans, and message-driven beans.

Session Beans.
Entity Beans.
Message-Driven Beans.

What are attributes in @transactional?

Which of the following is true about EJB Mcq?

EJB stands for Enterprise Java Bean. Q 2 – Which of the following is true about EJB? A – EJB is an essential part of a J2EE platform. B – EJB provides an architecture to develop and deploy component based enterprise applications considering robustness, high scalability and high performance.

How do you handle transactions in spring?

Spring supports both programmatic and declarative transaction management….

Begin the transaction using begin transaction command.
Perform various deleted, update or insert operations using SQL queries.
If all the operation are successful then perform commit otherwise rollback all the operations.

Why do we use @transactional annotation?

The @Transactional annotation makes use of the attributes rollbackFor or rollbackForClassName to rollback the transactions, and the attributes noRollbackFor or noRollbackForClassName to avoid rollback on listed exceptions. The default rollback behavior in the declarative approach will rollback on runtime exceptions.

What replaced EJB?

The Spring Framework is an application framework and IoC container for the Java platform. The framework was initially created as an alternative to EJB. Spring offers modular approach to adding new functionalities, which means that developers can use only parts they’re interested in.

Where is EJB used?

EJB beans are specifically designed to implement the business logic of your application. As such they provide services that are often needed when implementing such logic, such as transactions, injecting of the entity manager (used for JPA, the Java Persistence API) and pooling of beans.

What is EJB transaction in Java?

EJB – Transactions. EJB Container/Servers are transaction servers and handles transactions context propagation and distributed transactions. Transactions can be managed by the container or by custom code handling in bean’s code. Container Managed Transactions − In this type, the container manages the transaction states.

Which EJB entities cannot be configured with a transaction management type?

EJB 3.0 entities cannot be configured with a transaction management type. EJB 3.0 entities execute within the transactional context of the caller. EJB 2.1 entity beans must always use container-managed transaction demarcation. An EJB 2.1 entity bean must not be designated with bean-managed transaction demarcation.

What is an EJB container server?

What is a durable transaction in EJB?

Durable − Transaction should survive system failure if it has been executed or committed. EJB Container/Servers are transaction servers and handles transactions context propagation and distributed transactions. Transactions can be managed by the container or by custom code handling in bean’s code.