About commit

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Manual
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Auto Generated Values

id; : } During a commit the AUTO strategy uses the global number generator to generate ... also generates an automatic value during commit for every new entity object. The difference is that a separate ... is persisted (i.e. before commit). This may be useful when the primary key value is needed earlier
Manual
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JPA Lifecycle Events

(added to the EntityManager). @PostPersist - after storing a new entity in the database (during commit or ... the database (during commit or flush). @PreRemove - when an entity is marked for removal in the EntityManager. @PostRemove - after deleting an entity from the database (during commit or flush). An entity
Manual
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Working with JPA Entity Objects [2011-04-18]

via an EntityManager’s persist method, which must be invoked within an active transaction. On transaction commit ... commit.  See the Updating Entities section for more information about making changes to entities ... Managed to Removed, and is physically deleted from the database during commit. More details on object
Manual
13

Working with JPA Entity Objects

via an EntityManager’s persist method, which must be invoked within an active transaction. On transaction commit ... commit.  See the Updating Entities section for more information about making changes to entities ... Managed to Removed, and is physically deleted from the database during commit. More details on object
Manual
11

Database Management Settings

of the database file with $ added at the end. Every transaction commit is first written to the recovery ... (whose value is "true" or "false") specifies if physical writing is required before commit returns
Manual
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Shared (L2) Entity Cache

the database and added to the shared cache. On commit - new and modified entity objects are added ... should be added to the cache on commit and on retrieval. The property has three valid values
Manual
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DELETE Queries in JPA/JPQL

. Applying changes to the database by calling the commit method. JPQL DELETE queries provide ... (which use other EntityManager instances) only after commit. Delete All Queries The simplest form
Manual
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UPDATE SET Queries in JPA/JPQL

. Applying changes to the database by calling the commit method. JPQL UPDATE queries provide ... (which use other EntityManager instances) only after commit. Update All Queries The simpler form
Manual
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UPDATE SET Queries in JPA/JPQL [2011-11-22]

. Applying changes to the database by calling the commit method. JPQL UPDATE queries provide ... (which use other EntityManager instances) only after commit. Update All Queries The simpler form
Manual
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Obtaining a JPA Database Connection

is committed: em.getTransaction().commit(); The next section explains in more detail how to use the EntityManager and transactions for CRUD database operations.