spring-framework / org.springframework.cache.annotation / CachePut

CachePut

@Target([AnnotationTarget.FUNCTION, AnnotationTarget.PROPERTY_GETTER, AnnotationTarget.PROPERTY_SETTER, AnnotationTarget.CLASS, AnnotationTarget.FILE]) @Inherited class CachePut

Annotation indicating that a method (or all methods on a class) triggers a cache put operation.

In contrast to the Cacheable annotation, this annotation does not cause the advised method to be skipped. Rather, it always causes the method to be invoked and its result to be stored in the associated cache. Note that Java8's Optional return types are automatically handled and its content is stored in the cache if present.

This annotation may be used as a meta-annotation to create custom composed annotations with attribute overrides.

Author
Costin Leau

Author
Phillip Webb

Author
Stephane Nicoll

Author
Sam Brannen

Since
3.1

See Also
CacheConfig

Constructors

<init>

CachePut(vararg value: String, cacheNames: Array<String>, key: String, keyGenerator: String, cacheManager: String, cacheResolver: String, condition: String, unless: String)

Annotation indicating that a method (or all methods on a class) triggers a cache put operation.

In contrast to the Cacheable annotation, this annotation does not cause the advised method to be skipped. Rather, it always causes the method to be invoked and its result to be stored in the associated cache. Note that Java8's Optional return types are automatically handled and its content is stored in the cache if present.

This annotation may be used as a meta-annotation to create custom composed annotations with attribute overrides.

Properties

cacheManager

val cacheManager: String

The bean name of the custom org.springframework.cache.CacheManager to use to create a default org.springframework.cache.interceptor.CacheResolver if none is set already.

Mutually exclusive with the #cacheResolver attribute.

cacheNames

val cacheNames: Array<String>

Names of the caches to use for the cache put operation.

Names may be used to determine the target cache (or caches), matching the qualifier value or bean name of a specific bean definition.

cacheResolver

val cacheResolver: String

The bean name of the custom org.springframework.cache.interceptor.CacheResolver to use.

condition

val condition: String

Spring Expression Language (SpEL) expression used for making the cache put operation conditional.

Default is "", meaning the method result is always cached.

The SpEL expression evaluates against a dedicated context that provides the following meta-data:

  • #root.method, #root.target, and #root.caches for references to the java.lang.reflect.Method, target object, and affected cache(s) respectively.
  • Shortcuts for the method name (#root.methodName) and target class (#root.targetClass) are also available.
  • Method arguments can be accessed by index. For instance the second argument can be accessed via #root.args[1], #p1 or #a1. Arguments can also be accessed by name if that information is available.

key

val key: String

Spring Expression Language (SpEL) expression for computing the key dynamically.

Default is "", meaning all method parameters are considered as a key, unless a custom #keyGenerator has been set.

The SpEL expression evaluates against a dedicated context that provides the following meta-data:

  • #result for a reference to the result of the method invocation. For supported wrappers such as Optional, #result refers to the actual object, not the wrapper
  • #root.method, #root.target, and #root.caches for references to the java.lang.reflect.Method, target object, and affected cache(s) respectively.
  • Shortcuts for the method name (#root.methodName) and target class (#root.targetClass) are also available.
  • Method arguments can be accessed by index. For instance the second argument can be accessed via #root.args[1], #p1 or #a1. Arguments can also be accessed by name if that information is available.

keyGenerator

val keyGenerator: String

The bean name of the custom org.springframework.cache.interceptor.KeyGenerator to use.

Mutually exclusive with the #key attribute.

unless

val unless: String

Spring Expression Language (SpEL) expression used to veto the cache put operation.

Unlike #condition, this expression is evaluated after the method has been called and can therefore refer to the result.

Default is "", meaning that caching is never vetoed.

The SpEL expression evaluates against a dedicated context that provides the following meta-data:

  • #result for a reference to the result of the method invocation. For supported wrappers such as Optional, #result refers to the actual object, not the wrapper
  • #root.method, #root.target, and #root.caches for references to the java.lang.reflect.Method, target object, and affected cache(s) respectively.
  • Shortcuts for the method name (#root.methodName) and target class (#root.targetClass) are also available.
  • Method arguments can be accessed by index. For instance the second argument can be accessed via #root.args[1], #p1 or #a1. Arguments can also be accessed by name if that information is available.

value

val value: Array<String>

Alias for #cacheNames.