How does Hibernate manage concurrency?
How does Hibernate manage concurrency?
Concurrency control with Hibernate 4
- Application version checking. With this approach an application has to manually maintain the versions of the entities.
- Automatic versioning.
- An interesting fact.
- Session per operation (anti pattern)
- Session per request.
- Session per application.
What is Hibernate concurrency?
With optimistic locking, Hibernate will check that the user account wasn’t altered between the time it was read and saved. A concurrent transaction may then fail and be rolled back. With pessimistic locking, you lock the row when you read it and it’s unlocked only when transaction completes.
What is transaction and concurrency?
Concurrency control concept comes under the Transaction in database management system (DBMS). It is a procedure in DBMS which helps us for the management of two simultaneous processes to execute without conflicts between each other, these conflicts occur in multi user systems.
What is Hibernate transaction?
Transaction Interface in Hibernate In hibernate framework, we have Transaction interface that defines the unit of work. It maintains abstraction from the transaction implementation (JTA,JDBC). A transaction is associated with Session and instantiated by calling session.
What is the difference between spring transaction and Hibernate transaction?
Hibernate deals with database specific transactions, whereas spring provides a general transaction management service. @Transactional is a nice way of configuring transaction management behaviour.
Can we create multiple sessions in Hibernate?
Example to get a Session object in Hibernate using SessionFactory. Can we create multiple SessionFactory in one application? Yes, we can.
Why do you need concurrency in transactions?
Reasons for using Concurrency control method is DBMS: To apply Isolation through mutual exclusion between conflicting transactions. To resolve read-write and write-write conflict issues. To preserve database consistency through constantly preserving execution obstructions.
What concurrency means?
Definition of concurrent 1 : operating or occurring at the same time. 2a : running parallel. b : convergent specifically : meeting or intersecting in a point.
Why transaction is used in Hibernate?
Is transaction mandatory in Hibernate?
No, you don’t need to use transaction unless and until you are planning to persist the data inside the db. And In your question you are not persisting the date you are just fetching the records from the db. So here not mandatory to use transaction.