Скачать или смотреть Implementing Batch Jobs with Hibernate

Like most Java developers, you probably use Hibernate directly or via Spring Data JPA to implement your application’s persistence layer. In general, this works very well for most use cases, but it causes some issues if you need to implement a batch job.

This is because Hibernate, like most object-relational mapping frameworks, maps each database record to an entity object. It processes each one as an independent element with its own lifecycle and its own database operations. This creates an overhead if you want to implement a batch job that works on thousands of records.

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