com.holonplatform.datastore.jpa.context

Interface EntityManagerOperation<R>

Type Parameters:

R - Operation result type

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface EntityManagerOperation<R>

Represents an operation to be executed using a Datastore managed EntityManager.

If returning a result is not required, the EntityManagerRunnable can be used.

Since:

5.1.0

See Also:

EntityManagerRunnable

Method Summary

Modifier and Type	Method and Description
R	execute(javax.persistence.EntityManager entityManager) Execute an operation and returns a result.

Method Detail

execute

R execute(javax.persistence.EntityManager entityManager)
   throws Exception

Execute an operation and returns a result.

Parameters:

entityManager - EntityManager to use

Returns:

Operation result

Throws:

Exception - If an operation execution error occurred