org.springframework.cache.interceptor

## 类 AbstractFallbackCacheOperationSource

- java.lang.Object
- - org.springframework.cache.interceptor.AbstractFallbackCacheOperationSource

- 所有已实现的接口:
    CacheOperationSource
  直接已知子类:
    AnnotationCacheOperationSource

      public abstract class AbstractFallbackCacheOperationSource
      extends Object
      implements CacheOperationSource

  Abstract implementation of `CacheOperation` that caches attributes for methods and implements a fallback policy: 1. specific target method; 2. target class; 3. declaring method; 4. declaring class/interface.

  Defaults to using the target class's caching attribute if none is associated with the target method. Any caching attribute associated with the target method completely overrides a class caching attribute. If none found on the target class, the interface that the invoked method has been called through (in case of a JDK proxy) will be checked.

  This implementation caches attributes by method after they are first used. If it is ever desirable to allow dynamic changing of cacheable attributes (which is very unlikely), caching could be made configurable.

  从以下版本开始:
    3.1
  作者:
    Costin Leau, Juergen Hoeller

- - ### 字段概要

    字段
    限定符和类型 | 字段和说明
    --- | ---
    `protected Log` | `logger` Logger available to subclasses.

  - ### 构造器概要

    构造器
    构造器和说明
    `AbstractFallbackCacheOperationSource()`

  - ### 方法概要

    所有方法 实例方法 抽象方法 具体方法
    限定符和类型 | 方法和说明
    --- | ---
    `protected boolean` | `allowPublicMethodsOnly()` Should only public methods be allowed to have caching semantics?
    `protected abstract Collection<CacheOperation>` | `findCacheOperations(Class<?> clazz)` Subclasses need to implement this to return the caching attribute for the given class, if any.
    `protected abstract Collection<CacheOperation>` | `findCacheOperations(Method method)` Subclasses need to implement this to return the caching attribute for the given method, if any.
    `protected Object` | `getCacheKey(Method method, Class<?> targetClass)` Determine a cache key for the given method and target class.
    `Collection<CacheOperation>` | `getCacheOperations(Method method, Class<?> targetClass)` Determine the caching attribute for this method invocation.

    - ### 从类继承的方法 java.lang.Object

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

- - ### 字段详细资料

    - #### logger

          protected final Log logger

      Logger available to subclasses.

      As this base class is not marked Serializable, the logger will be recreated after serialization - provided that the concrete subclass is Serializable.

  - ### 构造器详细资料

    - #### AbstractFallbackCacheOperationSource

          public AbstractFallbackCacheOperationSource()

  - ### 方法详细资料

    - #### getCacheOperations

          @Nullable
          public Collection<CacheOperation> getCacheOperations(Method method,
                                                                          @Nullable
                                                                          Class<?> targetClass)

      Determine the caching attribute for this method invocation.

      Defaults to the class's caching attribute if no method attribute is found.

      指定者:
        `getCacheOperations` 在接口中 `CacheOperationSource`
      参数:
        `method` - the method for the current invocation (never `null`)
        `targetClass` - the target class for this invocation (may be `null`)
      返回:
        `CacheOperation` for this method, or `null` if the method is not cacheable

    - #### getCacheKey

          protected Object getCacheKey(Method method,
                                       @Nullable
                                       Class<?> targetClass)

      Determine a cache key for the given method and target class.

      Must not produce same key for overloaded methods. Must produce same key for different instances of the same method.

      参数:
        `method` - the method (never `null`)
        `targetClass` - the target class (may be `null`)
      返回:
        the cache key (never `null`)

    - #### findCacheOperations

          @Nullable
          protected abstract Collection<CacheOperation> findCacheOperations(Class<?> clazz)

      Subclasses need to implement this to return the caching attribute for the given class, if any.
      参数:
        `clazz` - the class to retrieve the attribute for
      返回:
        all caching attribute associated with this class, or `null` if none

    - #### findCacheOperations

          @Nullable
          protected abstract Collection<CacheOperation> findCacheOperations(Method method)

      Subclasses need to implement this to return the caching attribute for the given method, if any.
      参数:
        `method` - the method to retrieve the attribute for
      返回:
        all caching attribute associated with this method, or `null` if none

    - #### allowPublicMethodsOnly

          protected boolean allowPublicMethodsOnly()

      Should only public methods be allowed to have caching semantics?

      The default implementation returns `false`.