What is javax transaction UserTransaction?
1—UserTransaction—The javax. transaction. UserTransaction interface provides the application the ability to control transaction boundaries programmatically. The javax. TransactionManager interface allows the application server to control transaction boundaries on behalf of the application being managed.
What is transaction in EJB?
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. Bean Managed Transactions − In this type, the developer manages the life cycle of transaction states.
What is propagation in transaction management?
What Is Transaction Propagation? Transaction propagation indicates if any component or service will or will not participate in a transaction and how will it behave if the calling component/service already has or does not have a transaction created already.
What is transaction DBMS?
A transaction is a single logical unit of work which accesses and possibly modifies the contents of a database. Transactions access data using read and write operations. In order to maintain consistency in a database, before and after the transaction, certain properties are followed. These are called ACID properties.
Which of the following Java methods of javax transaction Usertransaction interface can start a JDBC transaction?
javax.transaction Interface UserTransaction
| Method Summary | |
|---|---|
| void | begin() Create a new transaction and associate it with the current thread. |
| void | commit() Complete the transaction associated with the current thread. |
| int | getStatus() Obtain the status of the transaction associated with the current thread. |
What is container managed transaction?
Container managed transactions are considered the place where the container (JEE Server) controls the boundaries of the transactions, when to begin, when to commit or to rollback.
Which transaction propagation level always spawns a new transaction?
REQUIRED Propagation REQUIRED is the default propagation. Spring checks if there is an active transaction, and if nothing exists, it creates a new one.
What is propagation in transaction annotation in Spring?
In Spring applications, if you enable annotation based transaction support using and annotate any class/method with @Transactional(propagation=Propagation. REQUIRED) then Spring framework will start a transaction and executes the method and commits the transaction.
What is transaction in DBMS explain basic properties of transaction?
What does required new mean in EJB transaction?
REQUIRED − Indicates that business method has to be executed within transaction, otherwise a new transaction will be started for that method. REQUIRES_NEW − Indicates that a new transaction, is to be started for the business method. SUPPORTS − Indicates that business method will execute as part of transaction.
What do you need to know about EJB server?
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.
What does acid stand for in EJB transactions?
ACID stands for Atomic, Consistent, Isolated, and Durable. Atomic − If any of the work item fails, the whole unit will be considered failed. Success meant, all items execute successfully. Consistent − A transaction must keep the system in consistent state.
What do you mean by durable 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.