com.avaje.ebeaninternal.server.transaction

Class DefaultPersistenceContext

java.lang.Object

com.avaje.ebeaninternal.server.transaction.DefaultPersistenceContext

All Implemented Interfaces:

PersistenceContext

public final class DefaultPersistenceContext
extends Object
implements PersistenceContext

Default implementation of PersistenceContext.

Ensures only one instance of a bean is used according to its type and unique id.

PersistenceContext lives on a Transaction and as such is expected to only have a single thread accessing it at a time. This is not expected to be used concurrently.

Duplicate beans are ones having the same type and unique id value. These are considered duplicates and replaced by the bean instance that was already loaded into the PersistanceContext.

Nested Class Summary

Nested classes/interfaces inherited from interface com.avaje.ebean.bean.PersistenceContext

PersistenceContext.WithOption

Constructor Summary

Constructors

Constructor and Description
DefaultPersistenceContext() Create a new PersistanceContext.

Method Summary

Methods

Modifier and Type	Method and Description
void	clear() Clear the PersistenceContext.
void	clear(Class<?> beanType) Clear all the references for a given type of entity bean.
void	clear(Class<?> beanType, Object id) Clear the reference to a specific entity bean.
void	deleted(Class<?> beanType, Object id) Clear the reference as a result of an entity being deleted.
Object	get(Class<?> beanType, Object id) Return an object given its type and unique id.
PersistenceContext.WithOption	getWithOption(Class<?> beanType, Object id) Get the bean from the persistence context also checked to see if it had been previously deleted (if so then you also can't hit the L2 cache to fetch the bean for this particular persistence context).
void	put(Object id, Object bean) Set an object into the PersistanceContext.
Object	putIfAbsent(Object id, Object bean) Put the entity bean into the PersistanceContext if one is not already present (for this id).
int	size(Class<?> beanType) Return the number of beans of the given type in the persistence context.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DefaultPersistenceContext

public DefaultPersistenceContext()

Create a new PersistanceContext.

Method Detail

put

public void put(Object id,
       Object bean)

Set an object into the PersistanceContext.

Specified by:

put in interface PersistenceContext

putIfAbsent

public Object putIfAbsent(Object id,
                 Object bean)

Description copied from interface: PersistenceContext

Put the entity bean into the PersistanceContext if one is not already present (for this id).

Returns an existing entity bean (if one is already there) and otherwise returns null.

Specified by:

putIfAbsent in interface PersistenceContext

get

public Object get(Class<?> beanType,
         Object id)

Return an object given its type and unique id.

Specified by:

get in interface PersistenceContext

getWithOption

public PersistenceContext.WithOption getWithOption(Class<?> beanType,
                                          Object id)

Description copied from interface: PersistenceContext

Get the bean from the persistence context also checked to see if it had been previously deleted (if so then you also can't hit the L2 cache to fetch the bean for this particular persistence context).

Specified by:

getWithOption in interface PersistenceContext

size

public int size(Class<?> beanType)

Return the number of beans of the given type in the persistence context.

Specified by:

size in interface PersistenceContext

clear

public void clear()

Clear the PersistenceContext.

Specified by:

clear in interface PersistenceContext

clear

public void clear(Class<?> beanType)

Description copied from interface: PersistenceContext

Clear all the references for a given type of entity bean.

Specified by:

clear in interface PersistenceContext

deleted

public void deleted(Class<?> beanType,
           Object id)

Description copied from interface: PersistenceContext

Clear the reference as a result of an entity being deleted.

Specified by:

deleted in interface PersistenceContext

clear

public void clear(Class<?> beanType,
         Object id)

Description copied from interface: PersistenceContext

Clear the reference to a specific entity bean.

Specified by:

clear in interface PersistenceContext

toString

public String toString()

Overrides:

toString in class Object