JPA & Hibernate: Entity Lifecycle Model

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The entity lifecycle model is one of the core concepts of JPA and all its implementations. Even though it’s not directly visible when working with JPA’s EntityManager, it affects all operations you perform. The different states of the model define how your persistence provider, e.g. Hibernate, handles your entity objects. This includes if it loads it from the database or gets it from an internal cache, if it persists changes and if it removes the entity.

Welcome to this in-depth guide to the entity lifecycle model in JPA & Hibernate. I will explain all the different lifecycle states and the SQL statements they trigger. So be sure to stay till the end.

Links mentioned:
JPA for Beginners online course

What’s the difference between persist, save, merge and update? Which one should you use?

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  1. Thorben Janssen
  2. Hibernate
  3. JPA
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Комментарии
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im currently trying to learn jpa, this was the first time i think i actually understood the lifecycle. gj, subbed :)

senX
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What is the best way to write managed object as duplicate? For example, if I load object Book book = em.find(Book.class, 1L); I want to re-persist it but this time with ID 2. Removing only ID obviously won't work.
At the moment I'm using copy constructor or JSON (de)serialization (I understand this one is slow approach).

siux
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I am using Linux Ubuntu os. I want hibarnate external jar files for eclipse

mohangabhale