What are the different transaction isolation levels in Spring Boot?

What are the different transaction isolation levels in Spring Boot?

In Spring Boot, transaction isolation levels define how transaction integrity is visible to other transactions. The main levels are READ_UNCOMMITTED, READ_COMMITTED, REPEATABLE_READ, and SERIALIZABLE.

Can you explain each isolation level briefly?

Sure!

1. READ_UNCOMMITTED: Allows dirty reads, meaning transactions can see uncommitted changes.
2. READ_COMMITTED: Prevents dirty reads; transactions only see committed changes.
3. REPEATABLE_READ: Ensures that if a transaction reads a row, it will see the same data if it reads it again, preventing non-repeatable reads.
4. SERIALIZABLE: The strictest level, it ensures complete isolation from other transactions, effectively serializing them.

Which isolation level is the most commonly used?

READ_COMMITTED is the most commonly used isolation level in many applications, as it balances performance and data integrity.

How can I set the isolation level in Spring Boot?

You can set the isolation level in Spring Boot using the @Transactional annotation. For example: @Transactional(isolation = Isolation.READ_COMMITTED).