Package org.apache.cayenne.cache
Class NestedQueryCache
java.lang.Object
org.apache.cayenne.cache.NestedQueryCache
- All Implemented Interfaces:
QueryCache
A
QueryCache wrapper that introduces a key namespace on top of a
delegate shared cache. This way multiple cache users can share the same
underlying cache without a possibility of key conflicts, yet refresh the
cache groups in a coordinated fashion.- Since:
- 3.0
-
Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoidclear()Deprecated.since 4.0get(QueryMetadata metadata) Returns a cached query result for the given QueryMetadata or null if the result is not cached or is expired.get(QueryMetadata metadata, QueryCacheEntryFactory factory) Returns a cached query result for the given QueryMetadata.Returns the actual implementation of the query cache that is wrapped by this NestedQueryCache.voidput(QueryMetadata metadata, List results) voidRemoves an entry for key in the current namespace.voidremoveGroup(String groupKey) Invalidates a shared cache group.voidremoveGroup(String groupKey, Class<?> keyType, Class<?> valueType) Removes a group of entries identified by group key.
-
Field Details
-
delegate
-
namespace
-
-
Constructor Details
-
NestedQueryCache
-
-
Method Details
-
getDelegate
Returns the actual implementation of the query cache that is wrapped by this NestedQueryCache. -
clear
Deprecated.since 4.0Clears the underlying shared cache.- Specified by:
clearin interfaceQueryCache- See Also:
-
get
Description copied from interface:QueryCacheReturns a cached query result for the given QueryMetadata. If the result is not cached or is expired, cache will use provided factory to rebuild the value and store it in the cache. A corollary is that this method never returns null.Compared to
QueryCache.get(QueryMetadata), this method allows the cache to do appropriate synchronization when refreshing the entry, preventing multiple threads from running the same query when a missing entry is requested by multiple threads simultaneously.- Specified by:
getin interfaceQueryCache
-
get
Description copied from interface:QueryCacheReturns a cached query result for the given QueryMetadata or null if the result is not cached or is expired.- Specified by:
getin interfaceQueryCache
-
put
- Specified by:
putin interfaceQueryCache
-
remove
Removes an entry for key in the current namespace.- Specified by:
removein interfaceQueryCache
-
removeGroup
Invalidates a shared cache group.- Specified by:
removeGroupin interfaceQueryCache
-
removeGroup
Description copied from interface:QueryCacheRemoves a group of entries identified by group key. Can be used if cache provider supports strictly typed caches.- Specified by:
removeGroupin interfaceQueryCache- See Also:
-