org.springframework.cache.interceptor

Class CacheAspectSupport

java.lang.Object

org.springframework.cache.interceptor.AbstractCacheInvoker

org.springframework.cache.interceptor.CacheAspectSupport

All Implemented Interfaces:

Aware, InitializingBean, SmartInitializingSingleton, ApplicationContextAware

Direct Known Subclasses:

CacheInterceptor

public abstract class CacheAspectSupport
extends AbstractCacheInvoker
implements ApplicationContextAware, 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 methods in this class in the correct order.

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

A cache aspect is serializable if its CacheResolver and CacheOperationSource are serializable.

Since:

3.1

Author:

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

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	CacheAspectSupport.CacheOperationContext
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 and Description
protected Log	logger

Constructor Summary

Constructors

Constructor and Description
CacheAspectSupport()

Method Summary

Modifier and Type	Method and Description
void	afterPropertiesSet() Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).
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.
protected Object	execute(CacheOperationInvoker invoker, Object target, Method method, Object[] args)
protected <T> T	getBean(String beanName, Class<T> expectedType) Return 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	setApplicationContext(ApplicationContext applicationContext) Set the ApplicationContext that this object runs in.
void	setCacheManager(CacheManager cacheManager) Set the CacheManager to use to create a default CacheResolver.
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, doPut, getErrorHandler, setErrorHandler

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected final Log logger

Constructor Detail

CacheAspectSupport

public CacheAspectSupport()

Method Detail

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.

getCacheOperationSource

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.

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(CacheResolver), SimpleCacheResolver

setCacheResolver

public 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.

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

See Also:

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

getCacheResolver

public CacheResolver getCacheResolver()

Return the default CacheResolver that this cache aspect delegates to.

setApplicationContext

public void setApplicationContext(ApplicationContext applicationContext)

Description copied from interface: ApplicationContextAware

Set the ApplicationContext that this object runs in. Normally this call will be used to initialize the object.

Invoked after population of normal bean properties but before an init callback such as InitializingBean.afterPropertiesSet() or a custom init-method. Invoked after ResourceLoaderAware.setResourceLoader(org.springframework.core.io.ResourceLoader), ApplicationEventPublisherAware.setApplicationEventPublisher(org.springframework.context.ApplicationEventPublisher) and MessageSourceAware, if applicable.

Specified by:

setApplicationContext in interface ApplicationContextAware

Parameters:

applicationContext - the ApplicationContext object to be used by this object

See Also:

BeanInitializationException

afterPropertiesSet

public void afterPropertiesSet()

Description copied from interface: InitializingBean

Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).

This method allows the bean instance to perform initialization only possible when all bean properties have been set and to throw an exception in the event of misconfiguration.

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 beanName,
                        Class<T> expectedType)

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

Parameters:

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

expectedType - type for the bean

Returns:

the bean matching that name

Throws:

NoSuchBeanDefinitionException - if such bean does not exist

See Also:

CacheOperation.keyGenerator, CacheOperation.cacheManager, CacheOperation.cacheResolver

clearMetadataCache

protected void clearMetadataCache()

Clear the cached metadata.

execute

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

invokeOperation

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()