Interface Cache<K,V>
- Type Parameters:
K
- The type of the key.V
- The type of the value.
- All Known Implementing Classes:
GuavaCache
,InMemoryCache
,NoCache
public interface Cache<K,V>
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Method Summary
Modifier and TypeMethodDescriptionboolean
ReturnsTrue
if the cache contains a entry with the key, orFalse
if there is none.Returns the value associated withkey
in this cache, or empty if there is no cached value forkey
.boolean
isEmpty()
ReturnsTrue
if the cache is empty, orFalse
if there's at least a entry stored in cache.void
Associates value with key in this cache.void
Discards any cached value for this key.void
Discards all entries in the cache.long
size()
Returns the number of entries in this cache.
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Method Details
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put
Associates value with key in this cache.
If the cache previously contained a value associated with key, the old value is replaced by value.- Parameters:
key
- The key to be used as index.value
- The value to be stored.
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get
Returns the value associated withkey
in this cache, or empty if there is no cached value forkey
.- Parameters:
key
- The key to look for.- Returns:
- The value stored in cache if present.
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remove
Discards any cached value for this key.- Parameters:
key
- The key to be discarded.
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removeAll
void removeAll()Discards all entries in the cache. -
contains
ReturnsTrue
if the cache contains a entry with the key, orFalse
if there is none.- Parameters:
key
- The key to be verified.- Returns:
True
if the key is present.
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size
long size()Returns the number of entries in this cache.- Returns:
- The cache size.
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isEmpty
boolean isEmpty()ReturnsTrue
if the cache is empty, orFalse
if there's at least a entry stored in cache.- Returns:
True
if is empty.
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