com.holonplatform.datastore.jpa.context

Interface EntityManagerHandler

All Known Subinterfaces:

JpaDatastore, JpaDatastoreCommodityContext, JpaOperationContext, ORMDialectContext

public interface EntityManagerHandler

JPA EntityManager handler.

The concrete handler should consistently manage EntityManager lifecycle, including entity manager creation and closing.

Since:

5.1.0

Method Summary

Modifier and Type	Method and Description
<R> R	withEntityManager(EntityManagerOperation<R> operation) Execute given operation using an EntityManager instance provided by the Datastore and return the operation result.
default void	withEntityManager(EntityManagerRunnable operation) Execute given operation using an EntityManager instance provided by the Datastore.

Method Detail

withEntityManager

<R> R withEntityManager(EntityManagerOperation<R> operation)

Execute given operation using an EntityManager instance provided by the Datastore and return the operation result.

The EntityManager lifecycle is managed by the JPA Datastore, including creation and closing.

Type Parameters:

R - Operation result type

Parameters:

operation - The operation to execute (not null)

Returns:

Operation result

Throws:

com.holonplatform.core.exceptions.DataAccessException - If an error occurred during EntityManager management or operation execution

withEntityManager

default void withEntityManager(EntityManagerRunnable operation)

Execute given operation using an EntityManager instance provided by the Datastore.

The EntityManager lifecycle is managed by the JPA Datastore, including creation and closing.

Parameters:

operation - The operation to execute (not null)

Throws:

com.holonplatform.core.exceptions.DataAccessException - If an error occurred during EntityManager management or operation execution