Documentation
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Index ¶
- func NewSafeInMemoryCache[K comparable, V any](cache base.InMemoryCache[K, V]) base.InMemoryCache[K, V]
- type SafeInMemoryCache
- func (c *SafeInMemoryCache[K, V]) Algorithm() string
- func (c *SafeInMemoryCache[K, V]) Capacity() int
- func (c *SafeInMemoryCache[K, V]) Delete(key K) bool
- func (c *SafeInMemoryCache[K, V]) DeleteMany(keys []K) map[K]bool
- func (c *SafeInMemoryCache[K, V]) Get(key K) (value V, ok bool)
- func (c *SafeInMemoryCache[K, V]) GetMany(keys []K) (map[K]V, []K)
- func (c *SafeInMemoryCache[K, V]) Has(key K) bool
- func (c *SafeInMemoryCache[K, V]) HasMany(keys []K) map[K]bool
- func (c *SafeInMemoryCache[K, V]) Keys() []K
- func (c *SafeInMemoryCache[K, V]) Len() int
- func (c *SafeInMemoryCache[K, V]) Peek(key K) (value V, ok bool)
- func (c *SafeInMemoryCache[K, V]) PeekMany(keys []K) (map[K]V, []K)
- func (c *SafeInMemoryCache[K, V]) Purge()
- func (c *SafeInMemoryCache[K, V]) Range(f func(K, V) bool)
- func (c *SafeInMemoryCache[K, V]) Set(key K, value V)
- func (c *SafeInMemoryCache[K, V]) SetMany(items map[K]V)
- func (c *SafeInMemoryCache[K, V]) SizeBytes() int64
- func (c *SafeInMemoryCache[K, V]) Values() []V
Constants ¶
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Variables ¶
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Functions ¶
func NewSafeInMemoryCache ¶
func NewSafeInMemoryCache[K comparable, V any](cache base.InMemoryCache[K, V]) base.InMemoryCache[K, V]
NewSafeInMemoryCache creates a thread-safe wrapper around an existing cache implementation. This function wraps any cache that implements the InMemoryCache interface with read-write mutex protection to ensure safe concurrent access from multiple goroutines.
Types ¶
type SafeInMemoryCache ¶
type SafeInMemoryCache[K comparable, V any] struct { base.InMemoryCache[K, V] // Embedded cache implementation sync.RWMutex // Read-write mutex for thread safety }
SafeInMemoryCache is a thread-safe wrapper around any cache implementation. It uses a read-write mutex to protect all cache operations, allowing multiple concurrent readers but only one writer at a time.
func (*SafeInMemoryCache[K, V]) Algorithm ¶ added in v0.7.0
func (c *SafeInMemoryCache[K, V]) Algorithm() string
Algorithm returns the name of the eviction algorithm used by the cache. This is a read-only operation that doesn't require locking as algorithm is immutable.
func (*SafeInMemoryCache[K, V]) Capacity ¶ added in v0.7.0
func (c *SafeInMemoryCache[K, V]) Capacity() int
Capacity returns the maximum number of items the cache can hold. This is a read-only operation that doesn't require locking as capacity is immutable.
func (*SafeInMemoryCache[K, V]) Delete ¶
func (c *SafeInMemoryCache[K, V]) Delete(key K) bool
Delete removes a key from the cache using an exclusive write lock. Returns true if the key was found and removed, false otherwise.
func (*SafeInMemoryCache[K, V]) DeleteMany ¶
func (c *SafeInMemoryCache[K, V]) DeleteMany(keys []K) map[K]bool
DeleteMany removes multiple keys from the cache using an exclusive write lock. Returns a map where keys are the input keys and values indicate if the key was found and removed. If the input slice is empty, returns an empty map immediately.
func (*SafeInMemoryCache[K, V]) Get ¶
func (c *SafeInMemoryCache[K, V]) Get(key K) (value V, ok bool)
Get retrieves a value from the cache and makes it the most recently used item. Uses an exclusive write lock because the underlying cache may modify access order (e.g., move items in LRU cache), which requires write access.
func (*SafeInMemoryCache[K, V]) GetMany ¶
func (c *SafeInMemoryCache[K, V]) GetMany(keys []K) (map[K]V, []K)
GetMany retrieves multiple values from the cache using an exclusive write lock. Returns a map of found key-value pairs and a slice of missing keys. Uses write lock because underlying cache may modify access order. If the input slice is empty, returns empty results immediately.
func (*SafeInMemoryCache[K, V]) Has ¶
func (c *SafeInMemoryCache[K, V]) Has(key K) bool
Has checks if a key exists in the cache using a shared read lock. Multiple readers can access this method concurrently.
func (*SafeInMemoryCache[K, V]) HasMany ¶
func (c *SafeInMemoryCache[K, V]) HasMany(keys []K) map[K]bool
HasMany checks if multiple keys exist in the cache using a shared read lock. Returns a map where keys are the input keys and values indicate existence. If the input slice is empty, returns an empty map immediately.
func (*SafeInMemoryCache[K, V]) Keys ¶
func (c *SafeInMemoryCache[K, V]) Keys() []K
Keys returns all keys currently in the cache using a shared read lock. The returned slice is a snapshot and may not reflect concurrent modifications.
func (*SafeInMemoryCache[K, V]) Len ¶
func (c *SafeInMemoryCache[K, V]) Len() int
Len returns the current number of items in the cache using a shared read lock. The count is accurate at the time of the lock acquisition.
func (*SafeInMemoryCache[K, V]) Peek ¶
func (c *SafeInMemoryCache[K, V]) Peek(key K) (value V, ok bool)
Peek retrieves a value from the cache without updating access order. Uses a shared read lock since no modifications are made to the cache structure.
func (*SafeInMemoryCache[K, V]) PeekMany ¶
func (c *SafeInMemoryCache[K, V]) PeekMany(keys []K) (map[K]V, []K)
PeekMany retrieves multiple values from the cache without updating access order. Uses a shared read lock since no modifications are made to the cache structure. Returns a map of found key-value pairs and a slice of missing keys. If the input slice is empty, returns empty results immediately.
func (*SafeInMemoryCache[K, V]) Purge ¶
func (c *SafeInMemoryCache[K, V]) Purge()
Purge removes all keys and values from the cache using an exclusive write lock. This operation completely clears the cache and blocks all other operations.
func (*SafeInMemoryCache[K, V]) Range ¶
func (c *SafeInMemoryCache[K, V]) Range(f func(K, V) bool)
Range iterates over all key-value pairs in the cache using a shared read lock. The iteration is performed under lock protection to ensure consistency. The iteration stops if the function returns false.
func (*SafeInMemoryCache[K, V]) Set ¶
func (c *SafeInMemoryCache[K, V]) Set(key K, value V)
Set stores a key-value pair in the cache with exclusive write lock. This operation blocks other writers and readers until completion.
func (*SafeInMemoryCache[K, V]) SetMany ¶
func (c *SafeInMemoryCache[K, V]) SetMany(items map[K]V)
SetMany stores multiple key-value pairs in the cache using an exclusive write lock. This is more efficient than calling Set multiple times as it uses a single lock acquisition. If the input map is empty, the operation is skipped entirely.
func (*SafeInMemoryCache[K, V]) SizeBytes ¶ added in v0.7.0
func (c *SafeInMemoryCache[K, V]) SizeBytes() int64
SizeBytes returns the total size of all cache entries in bytes using a shared read lock. The size is accurate at the time of the lock acquisition.
func (*SafeInMemoryCache[K, V]) Values ¶
func (c *SafeInMemoryCache[K, V]) Values() []V
Values returns all values currently in the cache using a shared read lock. The returned slice is a snapshot and may not reflect concurrent modifications.
Source Files