Snippet

Optimistic Locking with @Version

Optimistic locking prevents concurrent updates from overwriting each other. The @Version field tracks changes; if two threads try to update the same row simultaneously, one will throw an ObjectOptimisticLockingFailureException.

snippet.java

java

@Entity
public class InventoryItem {
    @Id @GeneratedValue
    private Long id;
    
    @Version
    private Long version;
    
    private Integer stockLevel;
}

spring

Breakdown

@Version

Tells Spring Data JPA to use this field for version tracking during database updates.

private Long version

Every time the entity is updated, Spring automatically increments this value in the database.

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Optimistic Locking with @Version

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