Spring Boot @Transaction Isolation Levels? How Can We Prevent Dirty Reads, Non-Repeatable Reads, and Phantom Reads?
When building enterprise applications, transaction management is an essential aspect that should not be overlooked. Spring Boot provides support for transaction management through the use of @Transactional annotation. This annotation is used to mark a method as a transactional method, which allows you to define how the transaction should be handled.
One of the ACID properties is Isolation. Isolation level defines the degree to which a transaction should be isolated from the effects of other concurrent transactions. Spring Boot provides support for different isolation levels through the @Transactional annotation. In this blog post, we will explore the different isolation levels supported by Spring Boot, how to use them, and what is different.
In order to understand isolation levels, we first need to look at some of the problems that occur in the database. Because isolation levels are a technology developed against these problems that we will talk about below.
- Dirty Read: It occurs when a transaction reads data that has been modified but not committed by another transaction.
- Non-repeatable Read: A “non-repeatable read” occurs when data is read twice in a transaction and there is a difference between the data
- Phantom Read: A phantom read occurs when two identical queries are executed during a transaction and the row collection returned by the second query is different from the first
What is the difference between Non-Repeatable Read and Phantom Read?
Phantom Read and Non-repeatable Read seem to be similar. However, the data does not have to change for a Phantom read to occur, new data can be added or deleted from the list that will be returned as a result of the query. For more information please check StackOverflow
