![]() ![]() ![]() When you persist a new MyEntity, Hibernate will get the current time from the VM and store it as the creation and update timestamp. Private String LocalDateTime LocalDateTime updateDateTime Let’s have a look at an example entity that uses the 2 annotations to store the timestamp of its creation and last update.Īs you can see in the following code snippet, I just added the annotation to the createDateTime attribute and the annotation to the updateDateTime attribute. You can use the and with the following attribute types: Hibernate gets the current timestamp from the VM and sets it as the update timestamp on the SQL Update statement. The value of the attribute annotated with gets changed in a similar way with every SQL Update statement. When a new entity gets persisted, Hibernate gets the current timestamp from the VM and sets it as the value of the attribute annotated with After that, Hibernate will not change the value of this attribute. 2 and and annotations make it easy to track the timestamp of the creation and last update of an entity.So let’s have a more detailed look at it. It’s obvious that the last option is the easiest one to implement if you can use Hibernate-specific features. You can use the Hibernate-specific and annotations and let Hibernate trigger the required updates.You can use an additional framework, like Hibernate Envers, to write an audit log and get the update timestamp from there.You can use an entity lifecycle event to update the timestamp attribute of the entity before Hibernate performs the update.But Hibernate needs to perform an additional query to retrieve the generated values from the database. You can use a database update trigger that performs the change on a database level. Most DBAs will suggest this approach because it’s easy to implement on a database level.As so often, there are multiple ways to achieve that: You need a simple, fail-safe solution that automatically updates the timestamp for each and every change. It sounds like a simple requirement, but for a huge application, you don’t want to set a new update timestamp in every use case that changes the entity. Storing the creation timestamp or the timestamp of the last update is a common requirement for modern applications. Get access to all my video courses, 2 monthly Q&A calls, monthly coding challenges, a community of like-minded developers, and regular expert sessions. ![]()
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