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ryan
29 lines
1.0 KiB
Go
29 lines
1.0 KiB
Go
package contracts
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import (
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"context"
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"errors"
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"time"
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)
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// ErrCacheMiss is returned when an item is not found in the cache.
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var ErrCacheMiss = errors.New("contracts/cache: key not found")
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// CacheService defines the contract for multi-layer cache operations (RAM L1 + Redis L2 + Pub/Sub invalidation).
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type CacheService interface {
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// Get retrieves an item from cache into target. Returns ErrCacheMiss if not found.
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Get(ctx context.Context, key string, target any) error
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// Set stores an item into cache with a specified time-to-live duration.
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Set(ctx context.Context, key string, value any, ttl time.Duration) error
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// Delete evicts a key from local and remote cache tiers and broadcasts invalidation.
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Delete(ctx context.Context, key string) error
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// GetOrSet retrieves an item from cache, or calls loader to populate and return if missing.
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GetOrSet(ctx context.Context, key string, target any, ttl time.Duration, loader func() (any, error)) error
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// Invalidate is a semantic alias for Delete.
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Invalidate(ctx context.Context, key string) error
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}
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