EntityManagerSource (Tapestry API - 5.7.2)乐学网一站式学习平台

All Known Implementing Classes:

EntityManagerSourceImpl
```
public interface EntityManagerSource
```
Responsible for creating an EntityManager as needed.

Since:

5.3

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`EntityManager`	`create(String persistenceUnitName)`	Creates an EntityManager for the given persistence unit name.
`EntityManagerFactory`	`getEntityManagerFactory(String persistenceUnitName)`	Gets the EntityManagerFactory for the given persistence unit name, creating it as necessary.
`List<PersistenceUnitInfo>`	`getPersistenceUnitInfos()`	Get the list of PersistenceUnitInfo parsed from `persistence.xml`.

- Method Detail
  - create
```
EntityManager create(String persistenceUnitName)
```
    Creates an EntityManager for the given persistence unit name.
    
    Parameters:
    
    persistenceUnitName - the name of a persistence unit as defined in persistence.xml
    
    Returns:
    
    EntityManager for the given persistence unit name
  - getEntityManagerFactory
```
EntityManagerFactory getEntityManagerFactory(String persistenceUnitName)
```
    Gets the EntityManagerFactory for the given persistence unit name, creating it as necessary.
    
    Parameters:
    
    persistenceUnitName - the name of a persistence unit as defined in persistence.xml
    
    Returns:
    
    EntityManagerFactory for the given persistence unit name
  - getPersistenceUnitInfos
```
List<PersistenceUnitInfo> getPersistenceUnitInfos()
```
    Get the list of PersistenceUnitInfo parsed from persistence.xml.
    
    Returns:
    
    list of PersistenceUnitInfos