Which Hibernate object is synchronized with database at the end of transaction?
Table of Contents
- 1 Which Hibernate object is synchronized with database at the end of transaction?
- 2 Which state does the persistent object more to when the transaction is committed and Session is closed?
- 3 What is hibernate transaction?
- 4 Which of the following is true about persistent state of a persistent entity?
- 5 What are the three states of a Hibernate persistence object?
- 6 What are the different states of a persistent entity at a given point in time?
Which Hibernate object is synchronized with database at the end of transaction?
persistence context
Hibernate will set the id property (if the id is generated) and bind the entity to a persistence context. The persistence context is synchronized with the database when transaction.
Which state does the persistent object more to when the transaction is committed and Session is closed?
Detached – A detached instance is an object that has been persistent, but its Session has been closed. A detached instance can be reattached to a new Session at a later point in time, making it persistent again.
What is a persistent object in hibernate?
Persistent objects are instances of POJO classes that you create that represent rows in the table in the database. According to hibernate-doc an instance of POJO class representing table in database goes through 3 states of which persistent is one of them.
In which state of object Any changes made to the object will persist in the database table?
Persistent state Hence, we can say that an object is in the persistence state when we save or persist it. Here, each object represents the row of the database table. So, modifications in the data make changes in the database.
What is hibernate transaction?
A transaction simply represents a unit of work. In such case, if one step fails, the whole transaction fails (which is termed as atomicity). A transaction can be described by ACID properties (Atomicity, Consistency, Isolation and Durability).
Which of the following is true about persistent state of a persistent entity?
Q 23 – Which of the following is true about persistent state of a persistent entity? A – You can make a transient instance persistent by associating it with a Session.
What is persistent state?
A persistent state refers to the retention of that state, even after the process has been killed. In this case, the state is saved in persistent storage before device shutdown and then reloaded when the device turns on, ensuring that the device, workspace or data are in the same state after turning on the device.
What is persistent object?
In object technology, a persistent object is one that continues to exist after the program that created it has been unloaded. An object’s class and current state must be saved for use in subsequent sessions.
What are the three states of a Hibernate persistence object?
In the context of Hibernate’s Session, objects can be in one of three possible states: transient, persistent, or detached.
What are the different states of a persistent entity at a given point in time?
Given an instance of a class that is mapped to Hibernate, it can be in any one of four different persistence states (known as hibernate entity lifecyle states): Transient. Persistent. Detached.
How Hibernate sessions work?
Sessions are a Hibernate construct used to mediate connections with the database. The session opens a single database connection when it is created, and holds onto it until the session is closed.