Package org.springframework.cache.interceptor

Class CacheAspectSupport

java.lang.Object

org.springframework.cache.interceptor.AbstractCacheInvoker

org.springframework.cache.interceptor.CacheAspectSupport

All Implemented Interfaces:

Aware, BeanFactoryAware, InitializingBean, SmartInitializingSingleton

Direct Known Subclasses:

CacheInterceptor

public abstract class CacheAspectSupport
extends AbstractCacheInvoker
implements BeanFactoryAware, InitializingBean, SmartInitializingSingleton

Base class for caching aspects, such as the CacheInterceptor or an AspectJ aspect.

This enables the underlying Spring caching infrastructure to be used easily to implement an aspect for any aspect system.

Subclasses are responsible for calling relevant methods in the correct order.

Uses the Strategy design pattern. A CacheOperationSource is used for determining caching operations, a KeyGenerator will build the cache keys, and a CacheResolver will resolve the actual cache(s) to use.

Note: A cache aspect is serializable but does not perform any actual caching after deserialization.

Since:

3.1

Author:

Costin Leau, Juergen Hoeller, Chris Beams, Phillip Webb, Sam Brannen, Stephane Nicoll, Sebastien Deleuze

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	CacheAspectSupport.CacheOperationContext	A CacheOperationInvocationContext context for a CacheOperation.
protected static class	CacheAspectSupport.CacheOperationMetadata	Metadata of a cache operation that does not depend on a particular invocation which makes it a good candidate for caching.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	IGNORE_REACTIVESTREAMS_PROPERTY_NAME	System property that instructs Spring's caching infrastructure to ignore the presence of Reactive Streams, in particular Reactor's Mono/Flux in Cacheable method return type declarations.
protected final Log	logger

Fields inherited from class org.springframework.cache.interceptor.AbstractCacheInvoker

errorHandler

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	CacheAspectSupport()

Method Summary

Modifier and Type	Method	Description
void	afterPropertiesSet()	Invoked by the containing BeanFactory after it has set all bean properties and satisfied BeanFactoryAware, ApplicationContextAware etc.
void	afterSingletonsInstantiated()	Invoked right at the end of the singleton pre-instantiation phase, with a guarantee that all regular singleton beans have been created already.
protected void	clearMetadataCache()	Clear the cached metadata.
void	configure(Supplier<CacheErrorHandler> errorHandler, Supplier<KeyGenerator> keyGenerator, Supplier<CacheResolver> cacheResolver, Supplier<CacheManager> cacheManager)	Configure this aspect with the given error handler, key generator and cache resolver/manager suppliers, applying the corresponding default if a supplier is not resolvable.
protected Object	execute(CacheOperationInvoker invoker, Object target, Method method, Object[] args)
protected <T> T	getBean(String name, Class<T> serviceType)	Retrieve a bean with the specified name and type.
protected CacheAspectSupport.CacheOperationMetadata	getCacheOperationMetadata(CacheOperation operation, Method method, Class<?> targetClass)	Return the CacheAspectSupport.CacheOperationMetadata for the specified operation.
CacheOperationSource	getCacheOperationSource()	Return the CacheOperationSource for this cache aspect.
CacheResolver	getCacheResolver()	Return the default CacheResolver that this cache aspect delegates to.
protected Collection<? extends Cache>	getCaches(CacheOperationInvocationContext<CacheOperation> context, CacheResolver cacheResolver)
KeyGenerator	getKeyGenerator()	Return the default KeyGenerator that this cache aspect delegates to.
protected CacheAspectSupport.CacheOperationContext	getOperationContext(CacheOperation operation, Method method, Object[] args, Object target, Class<?> targetClass)
protected Object	invokeOperation(CacheOperationInvoker invoker)	Execute the underlying operation (typically in case of cache miss) and return the result of the invocation.
protected String	methodIdentification(Method method, Class<?> targetClass)	Convenience method to return a String representation of this Method for use in logging.
void	setBeanFactory(BeanFactory beanFactory)	Set the containing BeanFactory for CacheManager and other service lookups.
void	setCacheManager(CacheManager cacheManager)	Set the CacheManager to use to create a default CacheResolver.
void	setCacheOperationSource(CacheOperationSource cacheOperationSource)	Set the CacheOperationSource for this cache aspect.
void	setCacheOperationSources(CacheOperationSource... cacheOperationSources)	Set one or more cache operation sources which are used to find the cache attributes.
void	setCacheResolver(CacheResolver cacheResolver)	Set the default CacheResolver that this cache aspect should delegate to if no specific cache resolver has been set for the operation.
void	setKeyGenerator(KeyGenerator keyGenerator)	Set the default KeyGenerator that this cache aspect should delegate to if no specific key generator has been set for the operation.

Methods inherited from class org.springframework.cache.interceptor.AbstractCacheInvoker

doClear, doEvict, doGet, doGet, doPut, doRetrieve, doRetrieve, getErrorHandler, setErrorHandler

Methods inherited from class java.lang.Object

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

Field Details

IGNORE_REACTIVESTREAMS_PROPERTY_NAME

public static final String IGNORE_REACTIVESTREAMS_PROPERTY_NAME

System property that instructs Spring's caching infrastructure to ignore the presence of Reactive Streams, in particular Reactor's Mono/Flux in Cacheable method return type declarations.

By default, as of 6.1, Reactive Streams Publishers such as Reactor's Mono/Flux will be specifically processed for asynchronous caching of their produced values rather than trying to cache the returned Publisher instances themselves.

Switch this flag to "true" in order to ignore Reactive Streams Publishers and process them as regular return values through synchronous caching, restoring 6.0 behavior. Note that this is not recommended and only works in very limited scenarios, e.g. with manual Mono.cache()/Flux.cache() calls.

Since:

6.1.3

See Also:

• Publisher
• Constant Field Values

logger

protected final Log logger

Constructor Details

CacheAspectSupport

protected CacheAspectSupport()

Method Details

configure

public void configure(@Nullable
 Supplier<CacheErrorHandler> errorHandler,
 @Nullable
 Supplier<KeyGenerator> keyGenerator,
 @Nullable
 Supplier<CacheResolver> cacheResolver,
 @Nullable
 Supplier<CacheManager> cacheManager)

Configure this aspect with the given error handler, key generator and cache resolver/manager suppliers, applying the corresponding default if a supplier is not resolvable.

Since:

5.1

setCacheOperationSources

public void setCacheOperationSources(CacheOperationSource... cacheOperationSources)

Set one or more cache operation sources which are used to find the cache attributes. If more than one source is provided, they will be aggregated using a CompositeCacheOperationSource.

See Also:

• setCacheOperationSource(org.springframework.cache.interceptor.CacheOperationSource)

setCacheOperationSource

public void setCacheOperationSource(@Nullable
 CacheOperationSource cacheOperationSource)

Set the CacheOperationSource for this cache aspect.

Since:

5.1

See Also:

• setCacheOperationSources(org.springframework.cache.interceptor.CacheOperationSource...)

getCacheOperationSource

@Nullable
public CacheOperationSource getCacheOperationSource()

Return the CacheOperationSource for this cache aspect.

setKeyGenerator

public void setKeyGenerator(KeyGenerator keyGenerator)

Set the default KeyGenerator that this cache aspect should delegate to if no specific key generator has been set for the operation.

The default is a SimpleKeyGenerator.

getKeyGenerator

public KeyGenerator getKeyGenerator()

Return the default KeyGenerator that this cache aspect delegates to.

setCacheResolver

public void setCacheResolver(@Nullable
 CacheResolver cacheResolver)

Set the default CacheResolver that this cache aspect should delegate to if no specific cache resolver has been set for the operation.

The default resolver resolves the caches against their names and the default cache manager.

See Also:

• setCacheManager(org.springframework.cache.CacheManager)
• SimpleCacheResolver

getCacheResolver

@Nullable
public CacheResolver getCacheResolver()

Return the default CacheResolver that this cache aspect delegates to.

setCacheManager

public void setCacheManager(CacheManager cacheManager)

Set the CacheManager to use to create a default CacheResolver. Replace the current CacheResolver, if any.

See Also:

• setCacheResolver(org.springframework.cache.interceptor.CacheResolver)
• SimpleCacheResolver

setBeanFactory

public void setBeanFactory(BeanFactory beanFactory)

Set the containing BeanFactory for CacheManager and other service lookups.

Specified by:

setBeanFactory in interface BeanFactoryAware

Parameters:

beanFactory - owning BeanFactory (never null). The bean can immediately call methods on the factory.

Since:

4.3

See Also:

• BeanInitializationException

afterPropertiesSet

public void afterPropertiesSet()

Description copied from interface: InitializingBean

Invoked by the containing BeanFactory after it has set all bean properties and satisfied BeanFactoryAware, ApplicationContextAware etc.

This method allows the bean instance to perform validation of its overall configuration and final initialization when all bean properties have been set.

Specified by:

afterPropertiesSet in interface InitializingBean

afterSingletonsInstantiated

public void afterSingletonsInstantiated()

Description copied from interface: SmartInitializingSingleton

Invoked right at the end of the singleton pre-instantiation phase, with a guarantee that all regular singleton beans have been created already. ListableBeanFactory.getBeansOfType(java.lang.Class<T>) calls within this method won't trigger accidental side effects during bootstrap.

NOTE: This callback won't be triggered for singleton beans lazily initialized on demand after BeanFactory bootstrap, and not for any other bean scope either. Carefully use it for beans with the intended bootstrap semantics only.

Specified by:

afterSingletonsInstantiated in interface SmartInitializingSingleton

methodIdentification

protected String methodIdentification(Method method,
 Class<?> targetClass)

Convenience method to return a String representation of this Method for use in logging. Can be overridden in subclasses to provide a different identifier for the given method.

Parameters:

method - the method we're interested in

targetClass - class the method is on

Returns:

log message identifying this method

See Also:

• ClassUtils.getQualifiedMethodName(java.lang.reflect.Method)

getCaches

protected Collection<? extends Cache> getCaches(CacheOperationInvocationContext<CacheOperation> context,
 CacheResolver cacheResolver)

getOperationContext

protected CacheAspectSupport.CacheOperationContext getOperationContext(CacheOperation operation,
 Method method,
 Object[] args,
 Object target,
 Class<?> targetClass)

getCacheOperationMetadata

protected CacheAspectSupport.CacheOperationMetadata getCacheOperationMetadata(CacheOperation operation,
 Method method,
 Class<?> targetClass)

Return the CacheAspectSupport.CacheOperationMetadata for the specified operation.

Resolve the CacheResolver and the KeyGenerator to be used for the operation.

Parameters:

operation - the operation

method - the method on which the operation is invoked

targetClass - the target type

Returns:

the resolved metadata for the operation

getBean

protected <T> T getBean(String name,
 Class<T> serviceType)

Retrieve a bean with the specified name and type. Used to resolve services that are referenced by name in a CacheOperation.

Parameters:

name - the name of the bean, as defined by the cache operation

serviceType - the type expected by the operation's service reference

Returns:

the bean matching the expected type, qualified by the given name

Throws:

NoSuchBeanDefinitionException - if such bean does not exist

See Also:

• CacheOperation.getKeyGenerator()
• CacheOperation.getCacheManager()
• CacheOperation.getCacheResolver()

clearMetadataCache

protected void clearMetadataCache()

Clear the cached metadata.

execute

@Nullable
protected Object execute(CacheOperationInvoker invoker,
 Object target,
 Method method,
 Object[] args)

invokeOperation

@Nullable
protected Object invokeOperation(CacheOperationInvoker invoker)

Execute the underlying operation (typically in case of cache miss) and return the result of the invocation. If an exception occurs it will be wrapped in a CacheOperationInvoker.ThrowableWrapper: the exception can be handled or modified but it must be wrapped in a CacheOperationInvoker.ThrowableWrapper as well.

Parameters:

invoker - the invoker handling the operation being cached

Returns:

the result of the invocation

See Also:

• CacheOperationInvoker.invoke()