Package org.springframework.data.gemfire.expiration

Class AnnotationBasedExpiration<K,V>

java.lang.Object

org.springframework.data.gemfire.expiration.AnnotationBasedExpiration<K,V>

All Implemented Interfaces:

CacheCallback, CustomExpiry<K,V>, Declarable, Aware, BeanFactoryAware

public class AnnotationBasedExpiration<K,V>
extends Object
implements BeanFactoryAware, CustomExpiry<K,V>

The AnnotationBasedExpiration class is an implementation of the CustomExpiry interface that determines the Time-To-Live (TTL) or Idle-Timeout (TTI) expiration policy of a Region entry by introspecting the Region entry's class type and reflecting on any Region entries annotated with SDG's Expiration-based Annotations.

Since:

1.7.0

Author:

John Blum

See Also:

• Annotation
• BeanFactory
• BeanFactoryAware
• ExpirationActionType
• Expiration
• IdleTimeoutExpiration
• TimeToLiveExpiration
• CustomExpiry
• ExpirationAction
• ExpirationAttributes
• Region

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	AnnotationBasedExpiration.ExpirationMetaData	The ExpirationMetaData class encapsulates the settings constituting the expiration policy including the expiration timeout and the action performed when expiration occurs.

Field Summary

Fields

Modifier and Type	Field	Description
protected static final AtomicReference<BeanFactory>	BEAN_FACTORY_REFERENCE
protected static final AtomicReference<StandardEvaluationContext>	EVALUATION_CONTEXT_REFERENCE

Constructor Summary

Constructors

Constructor	Description
AnnotationBasedExpiration()	Constructs a new instance of the AnnotationBasedExpiration class with no default expiration policy.
AnnotationBasedExpiration(ExpirationAttributes defaultExpirationAttributes)	Constructs a new instance of AnnotationBasedExpiration initialized with a specific, default expiration policy.

Method Summary

Modifier and Type	Method	Description
void	close()	Called when the Region containing this callback is closed or destroyed, when the Cache is closed, or when a callback is removed from a Region using an AttributesMutator.
static <K, V> AnnotationBasedExpiration<K,V>	forIdleTimeout()	Factory method used to construct an instance of AnnotationBasedExpiration having no default ExpirationAttributes to process expired annotated Region entries using Idle Timeout (TTI) Expiration.
static <K, V> AnnotationBasedExpiration<K,V>	forIdleTimeout(ExpirationAttributes defaultExpirationAttributes)	Factory method used to construct an instance of AnnotationBasedExpiration initialized with default ExpirationAttributes to process expired annotated Region entries using Idle Timeout (TTI) expiration.
static <K, V> AnnotationBasedExpiration<K,V>	forTimeToLive()	Factory method used to construct an instance of AnnotationBasedExpiration having no default ExpirationAttributes to process expired annotated Region entries using Time-To-Live (TTL) Expiration.
static <K, V> AnnotationBasedExpiration<K,V>	forTimeToLive(ExpirationAttributes defaultExpirationAttributes)	Factory method used to construct an instance of AnnotationBasedExpiration initialized with default ExpirationAttributes to process expired annotated Region entries using Time-To-Live (TTL) expiration.
protected BeanFactory	getBeanFactory()	Gets a reference to the Spring BeanFactory in which this AnnotationBasedExpiration bean is managed.
protected ExpirationAttributes	getDefaultExpirationAttributes()	Gets the expiration policy used by default when no application domain object specific expiration meta-data has been specified.
protected Expiration	getExpiration(Region.Entry<K,V> entry)	Gets the Expiration Annotation meta-data from the Region Entry.
protected AnnotationBasedExpiration.ExpirationMetaData	getExpirationMetaData(Region.Entry<K,V> entry)	Gets custom expiration (Annotation-based) policy meta-data for the given Region entry.
ExpirationAttributes	getExpiry(Region.Entry<K,V> entry)	Calculate the expiration for a given entry.
protected IdleTimeoutExpiration	getIdleTimeout(Region.Entry<K,V> entry)	Gets the IdleTimeoutExpiration Annotation meta-data from the Region Entry.
protected TimeToLiveExpiration	getTimeToLive(Region.Entry<K,V> entry)	Gets the TimeToLiveExpiration Annotation meta-data from the Region Entry.
protected void	initEvaluationContext()	Initializes the Spring Expression Language (SpEL) EvaluationContext used to parse property placeholder and SpEL expressions in the Expiration annotation attribute values.
protected boolean	isExpirationConfigured(Region.Entry<K,V> entry)	Determines whether the Region Entry has been annotated with the Expiration Annotation.
protected boolean	isIdleTimeoutConfigured(Region.Entry<K,V> entry)	Determines whether the Region Entry has been annotated with the IdleTimeoutExpiration Annotation.
protected boolean	isTimeToLiveConfigured(Region.Entry<K,V> entry)	Determines whether the Region Entry has been annotated with the TimeToLiveExpiration Annotation.
protected ExpirationAttributes	newExpirationAttributes(AnnotationBasedExpiration.ExpirationMetaData expirationMetaData)	Constructs a new instance of ExpirationAttributes configured with the application domain object specific expiration policy.
void	setBeanFactory(BeanFactory beanFactory)	Sets the BeanFactory managing this AnnotationBasedExpiration bean in the Spring context.
void	setDefaultExpirationAttributes(ExpirationAttributes defaultExpirationAttributes)	Sets the expiration policy to use by default when no application domain object specific expiration meta-data has been specified.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.geode.cache.Declarable

init, initialize

Field Details

BEAN_FACTORY_REFERENCE

protected static final AtomicReference<BeanFactory> BEAN_FACTORY_REFERENCE

EVALUATION_CONTEXT_REFERENCE

protected static final AtomicReference<StandardEvaluationContext> EVALUATION_CONTEXT_REFERENCE

Constructor Details

AnnotationBasedExpiration

public AnnotationBasedExpiration()

Constructs a new instance of the AnnotationBasedExpiration class with no default expiration policy.

AnnotationBasedExpiration

public AnnotationBasedExpiration(ExpirationAttributes defaultExpirationAttributes)

Constructs a new instance of AnnotationBasedExpiration initialized with a specific, default expiration policy.

Parameters:

defaultExpirationAttributes - expiration settings used as the default expiration policy.

See Also:

• ExpirationAttributes

Method Details

forIdleTimeout

public static <K,
V> AnnotationBasedExpiration<K,V> forIdleTimeout()

Factory method used to construct an instance of AnnotationBasedExpiration having no default ExpirationAttributes to process expired annotated Region entries using Idle Timeout (TTI) Expiration.

Type Parameters:

K - Class type of the Region entry key.

V - Class type of the Region entry value.

Returns:

an AnnotationBasedExpiration instance to process expired annotated Region entries using Idle Timeout expiration.

See Also:

• AnnotationBasedExpiration
• IdleTimeoutExpiration
• forIdleTimeout(org.apache.geode.cache.ExpirationAttributes)

forIdleTimeout

public static <K,
V> AnnotationBasedExpiration<K,V> forIdleTimeout(ExpirationAttributes defaultExpirationAttributes)

Factory method used to construct an instance of AnnotationBasedExpiration initialized with default ExpirationAttributes to process expired annotated Region entries using Idle Timeout (TTI) expiration.

Type Parameters:

K - Class type of the Region entry key.

V - Class type of the Region entry value.

Parameters:

defaultExpirationAttributes - ExpirationAttributes used by default if no expiration policy was specified on the Region.

Returns:

an AnnotationBasedExpiration instance to process expired annotated Region entries using Idle Timeout expiration.

See Also:

• AnnotationBasedExpiration
• IdleTimeoutExpiration
• AnnotationBasedExpiration(ExpirationAttributes)

forTimeToLive

public static <K,
V> AnnotationBasedExpiration<K,V> forTimeToLive()

Factory method used to construct an instance of AnnotationBasedExpiration having no default ExpirationAttributes to process expired annotated Region entries using Time-To-Live (TTL) Expiration.

Type Parameters:

K - Class type of the Region entry key.

V - Class type of the Region entry value.

Returns:

an AnnotationBasedExpiration instance to process expired annotated Region entries using Time-To-Live expiration.

See Also:

• AnnotationBasedExpiration
• TimeToLiveExpiration
• forTimeToLive(org.apache.geode.cache.ExpirationAttributes)

forTimeToLive

public static <K,
V> AnnotationBasedExpiration<K,V> forTimeToLive(ExpirationAttributes defaultExpirationAttributes)

Factory method used to construct an instance of AnnotationBasedExpiration initialized with default ExpirationAttributes to process expired annotated Region entries using Time-To-Live (TTL) expiration.

Type Parameters:

K - Class type of the Region entry key.

V - Class type of the Region entry value.

Parameters:

defaultExpirationAttributes - ExpirationAttributes used by default if no expiration policy was specified on the Region.

Returns:

an AnnotationBasedExpiration instance to process expired annotated Region entries using Time-To-Live expiration.

See Also:

• AnnotationBasedExpiration
• TimeToLiveExpiration
• AnnotationBasedExpiration(ExpirationAttributes)

initEvaluationContext

protected void initEvaluationContext()

Initializes the Spring Expression Language (SpEL) EvaluationContext used to parse property placeholder and SpEL expressions in the Expiration annotation attribute values.

setBeanFactory

public void setBeanFactory(BeanFactory beanFactory)
                    throws BeansException

Sets the BeanFactory managing this AnnotationBasedExpiration bean in the Spring context.

Specified by:

setBeanFactory in interface BeanFactoryAware

Parameters:

beanFactory - the Spring BeanFactory to which this bean belongs.

Throws:

BeansException - if the BeanFactory reference cannot be initialized.

See Also:

• BeanFactory
• initEvaluationContext()

getBeanFactory

protected BeanFactory getBeanFactory()

Gets a reference to the Spring BeanFactory in which this AnnotationBasedExpiration bean is managed.

Returns:

a reference to the Spring BeanFactory.

Throws:

IllegalStateException - if the BeanFactory reference was not properly initialized.

See Also:

• BeanFactory

setDefaultExpirationAttributes

public void setDefaultExpirationAttributes(ExpirationAttributes defaultExpirationAttributes)

Sets the expiration policy to use by default when no application domain object specific expiration meta-data has been specified.

Parameters:

defaultExpirationAttributes - expiration settings used as the default expiration policy.

See Also:

• getDefaultExpirationAttributes()
• ExpirationAttributes

getDefaultExpirationAttributes

protected ExpirationAttributes getDefaultExpirationAttributes()

Gets the expiration policy used by default when no application domain object specific expiration meta-data has been specified.

Returns:

an instance of ExpirationAttributes with expiration settings defining the default expiration policy.

See Also:

• setDefaultExpirationAttributes(org.apache.geode.cache.ExpirationAttributes)
• ExpirationAttributes

getExpiry

public ExpirationAttributes getExpiry(Region.Entry<K,V> entry)

Calculate the expiration for a given entry. Returning null indicates that the default for the Region should be used. The entry parameter should not be used after this method invocation completes.

Specified by:

getExpiry in interface CustomExpiry<K,V>

Parameters:

entry - the entry used to determine the appropriate expiration policy.

Returns:

the expiration configuration to be used or null if the Region's defaults should be used.

See Also:

• ExpirationAttributes
• Region
• getExpirationMetaData(Region.Entry)
• newExpirationAttributes(ExpirationMetaData)

getExpirationMetaData

protected AnnotationBasedExpiration.ExpirationMetaData getExpirationMetaData(Region.Entry<K,V> entry)

Gets custom expiration (Annotation-based) policy meta-data for the given Region entry.

Parameters:

entry - Region entry used as the source of the expiration policy meta-data.

Returns:

AnnotationBasedExpiration.ExpirationMetaData extracted from the Region entry or null if the expiration policy meta-data could not be determined from the Region entry.

See Also:

• AnnotationBasedExpiration.ExpirationMetaData

newExpirationAttributes

protected ExpirationAttributes newExpirationAttributes(AnnotationBasedExpiration.ExpirationMetaData expirationMetaData)

Constructs a new instance of ExpirationAttributes configured with the application domain object specific expiration policy. If the application domain object type has not been annotated with custom expiration meta-data, then the default expiration settings are used.

Parameters:

expirationMetaData - application domain object specific expiration policy meta-data used to construct the ExpirationAttributes.

Returns:

custom ExpirationAttributes configured from the application domain object specific expiration policy or the default expiration settings if the application domain object has not been annotated with custom expiration meta-data.

See Also:

• AnnotationBasedExpiration.ExpirationMetaData
• ExpirationAttributes
• getDefaultExpirationAttributes()

isExpirationConfigured

protected boolean isExpirationConfigured(Region.Entry<K,V> entry)

Determines whether the Region Entry has been annotated with the Expiration Annotation.

Parameters:

entry - the Region.Entry to evaluate for the presence of the Expiration Annotation.

Returns:

a boolean value indicating whether the Region Entry has been annotated with @Expiration.

See Also:

• Expiration
• isAnnotationPresent(Object, Class)

getExpiration

protected Expiration getExpiration(Region.Entry<K,V> entry)

Gets the Expiration Annotation meta-data from the Region Entry.

Parameters:

entry - the Region.Entry from which to extract the Expiration Annotation meta-data.

Returns:

the Expiration Annotation meta-data for the given Region Entry or null if the Region Entry has not been annotated with @Expiration.

See Also:

• Expiration
• getAnnotation(Object, Class)

isIdleTimeoutConfigured

protected boolean isIdleTimeoutConfigured(Region.Entry<K,V> entry)

Determines whether the Region Entry has been annotated with the IdleTimeoutExpiration Annotation.

Parameters:

entry - the Region.Entry to evaluate for the presence of the IdleTimeoutExpiration Annotation.

Returns:

a boolean value indicating whether the Region Entry has been annotated with @IdleTimeoutExpiration.

See Also:

• IdleTimeoutExpiration
• isAnnotationPresent(Object, Class)

getIdleTimeout

protected IdleTimeoutExpiration getIdleTimeout(Region.Entry<K,V> entry)

Gets the IdleTimeoutExpiration Annotation meta-data from the Region Entry.

Parameters:

entry - the Region.Entry from which to extract the IdleTimeoutExpiration Annotation meta-data.

Returns:

the IdleTimeoutExpiration Annotation meta-data for the given Region Entry or null if the Region Entry has not been annotated with @IdleTimeoutExpiration.

See Also:

• IdleTimeoutExpiration
• getAnnotation(Object, Class)

isTimeToLiveConfigured

protected boolean isTimeToLiveConfigured(Region.Entry<K,V> entry)

Determines whether the Region Entry has been annotated with the TimeToLiveExpiration Annotation.

Parameters:

entry - the Region.Entry to evaluate for the presence of the TimeToLiveExpiration Annotation.

Returns:

a boolean value indicating whether the Region Entry has been annotated with @TimeToLiveExpiration.

See Also:

• TimeToLiveExpiration
• isAnnotationPresent(Object, Class)

getTimeToLive

protected TimeToLiveExpiration getTimeToLive(Region.Entry<K,V> entry)

Gets the TimeToLiveExpiration Annotation meta-data from the Region Entry.

Parameters:

entry - the Region.Entry from which to extract the TimeToLiveExpiration Annotation meta-data.

Returns:

the TimeToLiveExpiration Annotation meta-data for the given Region Entry or null if the Region Entry has not been annotated with @TimeToLiveExpiration.

See Also:

• TimeToLiveExpiration
• getAnnotation(Object, Class)

close

public void close()

Called when the Region containing this callback is closed or destroyed, when the Cache is closed, or when a callback is removed from a Region using an AttributesMutator.

Specified by:

close in interface CacheCallback