EMFProviderLMT (SmartClient Enterprise Server API 14.1d (2024-12-21))

java.lang.Object
- com.isomorphic.jpa.EMFProviderLMT

All Implemented Interfaces:

EMFProviderInterface

Direct Known Subclasses:

EMFProviderNoTransactions
```
public class EMFProviderLMT
extends java.lang.Object
implements EMFProviderInterface
```
EMF provider for Locally Managed Transactions (LMT).
Name of persistence unit can be read from jpa.persistenceUnitName property. EntityManagerFactory is created in static initialization block and used to create EntityManager objects.

Field Summary

Fields
Modifier and Type Field and Description

protected EntityManagerFactory emf
Holds EntityManagerFactory.
- Fields inherited from interface com.isomorphic.jpa.EMFProviderInterface
  ENTITY_MANAGER, ENTITY_MANAGER_FACTORY, JPA_ENTITY_MANAGER, JPA_ENTITY_MANAGER_FACTORY, JPA_PERSISTENCE_UNIT_NAME, JPA_TRANSACTION, PERSISTENCE_UNIT_NAME, TRANSACTION

Fields
Modifier and Type	Field and Description
`protected EntityManagerFactory`	`emf` Holds `EntityManagerFactory`.

Constructor Summary

Constructors
Constructor and Description
`EMFProviderLMT()` Creates new EMF provider.
`EMFProviderLMT(java.util.Properties config)` Creates new EMF provider.
`EMFProviderLMT(java.lang.String persistenceUnitName)` Creates new EMF provider with specified persistence unit name.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`commitTransaction(java.lang.Object tx)` Commits specified transaction.
`EntityManagerFactory`	`get()` Returns `EntityManagerFactory`.
`EntityManager`	`getEntityManager()` Returns `EntityManager` created using factory.
`java.lang.Object`	`getTransaction(EntityManager em)` Returns started transaction. Creates transaction with `em.getTransaction ()` and starts it.
`void`	`returnEntityManager(EntityManager em)` Closes `EntityManager`.
`void`	`rollbackTransaction(java.lang.Object tx)` Rolls back specified transaction.

- Field Detail
  - emf
```
protected EntityManagerFactory emf
```
    Holds EntityManagerFactory.
- Constructor Detail
  - EMFProviderLMT
```
public EMFProviderLMT()
```
    Creates new EMF provider. Name of persistence unit is read from jpa.persistenceUnitName property.
  - EMFProviderLMT
```
public EMFProviderLMT(java.util.Properties config)
```
    Creates new EMF provider. Name of persistence unit is read from provided persistenceUnitName property.
    
    Parameters:
    
    config - Properties for provider configuration.
  - EMFProviderLMT
```
public EMFProviderLMT(java.lang.String persistenceUnitName)
```
    Creates new EMF provider with specified persistence unit name.
    
    Parameters:
    
    persistenceUnitName - String name of persistence unit.
- Method Detail
  - get
```
public EntityManagerFactory get()
```
    Returns EntityManagerFactory.
    
    Specified by:
    
    get in interface EMFProviderInterface
    
    Returns:
    
    EntityManagerFactory for locally managed transactions.
  - getEntityManager
```
public EntityManager getEntityManager()
                               throws PersistenceException
```
    Returns EntityManager created using factory.
    
    Specified by:
    
    getEntityManager in interface EMFProviderInterface
    
    Returns:
    
    EntityManager for persistence operations.
    
    Throws:
    
    PersistenceException - if unable to acquire EntityManager.
  - returnEntityManager
```
public void returnEntityManager(EntityManager em)
```
    Closes EntityManager.
    
    Specified by:
    
    returnEntityManager in interface EMFProviderInterface
    
    Parameters:
    
    em - EntityManager which should be closed.
  - getTransaction
```
public java.lang.Object getTransaction(EntityManager em)
                                throws java.lang.Exception
```
    Returns started transaction.
    Creates transaction with em.getTransaction () and starts it.
    
    Specified by:
    
    getTransaction in interface EMFProviderInterface
    
    Parameters:
    
    em - EntityManager needed if joining to existing transaction or starting transaction locally.
    
    Returns:
    
    Object Already started transaction for persistence operations.
    
    Throws:
    
    PersistenceException - if unable to acquire or open transaction.
    
    java.lang.Exception - if unable to acquire or open transaction.
  - commitTransaction
```
public void commitTransaction(java.lang.Object tx)
                       throws java.lang.Exception
```
    Commits specified transaction. Issues tx.commit ().
    
    Specified by:
    
    commitTransaction in interface EMFProviderInterface
    
    Parameters:
    
    tx - Object transaction to be commited.
    
    Throws:
    
    java.lang.Exception - occured while committing transaction.
  - rollbackTransaction
```
public void rollbackTransaction(java.lang.Object tx)
```
    Rolls back specified transaction. Issues tx.rollback ().
    
    Specified by:
    
    rollbackTransaction in interface EMFProviderInterface
    
    Parameters:
    
    tx - Object transaction to be rolled back.

Class EMFProviderLMT

Field Summary

Fields inherited from interface com.isomorphic.jpa.EMFProviderInterface

Constructor Summary

Method Summary

Field Detail

emf

Constructor Detail

EMFProviderLMT

EMFProviderLMT

EMFProviderLMT

Method Detail

get

getEntityManager

returnEntityManager

getTransaction

commitTransaction

rollbackTransaction