Documentation
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Index ¶
- type CacheStats
- type FeedListCache
- type FeedListCacheStats
- type UnreadCache
- func (uc *UnreadCache) Get(userID int) (map[int]int, bool)
- func (uc *UnreadCache) GetStats() CacheStats
- func (uc *UnreadCache) Invalidate(userID int)
- func (uc *UnreadCache) InvalidateAll()
- func (uc *UnreadCache) Set(userID int, counts map[int]int)
- func (uc *UnreadCache) UpdateCount(userID, feedID int, wasRead, nowRead bool)
Constants ¶
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Variables ¶
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Functions ¶
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Types ¶
type CacheStats ¶
Stats returns cache statistics for monitoring.
type FeedListCache ¶
type FeedListCache struct {
// contains filtered or unexported fields
}
FeedListCache provides in-memory caching for the list of all user feeds. This dramatically reduces database reads during feed refresh operations by caching the result of GetAllUserFeeds() which is called every hour.
func NewFeedListCache ¶
func NewFeedListCache(ttl time.Duration) *FeedListCache
NewFeedListCache creates a new feed list cache with the specified TTL. Typical TTL is 15-30 minutes to balance freshness with cost savings.
func (*FeedListCache) Get ¶
func (fc *FeedListCache) Get() ([]database.Feed, bool)
Get retrieves the cached feed list if it exists and is not expired. Returns the feeds and true if cache hit, nil and false if cache miss.
func (*FeedListCache) GetStats ¶
func (fc *FeedListCache) GetStats() FeedListCacheStats
GetStats returns current cache statistics.
func (*FeedListCache) Invalidate ¶
func (fc *FeedListCache) Invalidate()
Invalidate clears the cached feed list, forcing a fresh fetch on next request. Use this when users subscribe/unsubscribe from feeds to ensure immediate updates.
func (*FeedListCache) Set ¶
func (fc *FeedListCache) Set(feeds []database.Feed)
Set stores the feed list in the cache with the configured TTL.
type FeedListCacheStats ¶
Stats returns cache statistics for monitoring.
type UnreadCache ¶
type UnreadCache struct {
// contains filtered or unexported fields
}
UnreadCache provides in-memory caching for unread article counts with incremental updates. This dramatically reduces database reads by serving cached counts and updating them incrementally when articles are marked as read/unread.
func NewUnreadCache ¶
func NewUnreadCache(ttl time.Duration) *UnreadCache
NewUnreadCache creates a new unread count cache with the specified TTL. Typical TTL is 90-120 seconds for background refresh of counts.
func (*UnreadCache) Get ¶
func (uc *UnreadCache) Get(userID int) (map[int]int, bool)
Get retrieves cached unread counts for a user if they exist and are not expired. Returns the counts and true if cache hit, nil and false if cache miss.
func (*UnreadCache) GetStats ¶
func (uc *UnreadCache) GetStats() CacheStats
GetStats returns current cache statistics.
func (*UnreadCache) Invalidate ¶
func (uc *UnreadCache) Invalidate(userID int)
Invalidate removes cached counts for a user, forcing a fresh fetch on next request. Use this for complex operations where incremental updates are difficult (e.g., batch operations).
func (*UnreadCache) InvalidateAll ¶
func (uc *UnreadCache) InvalidateAll()
InvalidateAll clears the entire cache. Useful for testing or maintenance.
func (*UnreadCache) Set ¶
func (uc *UnreadCache) Set(userID int, counts map[int]int)
Set stores unread counts for a user in the cache with the configured TTL.
func (*UnreadCache) UpdateCount ¶
func (uc *UnreadCache) UpdateCount(userID, feedID int, wasRead, nowRead bool)
UpdateCount incrementally updates the cached count when an article's read status changes. This provides immediate feedback to users while maintaining cache accuracy.
Parameters:
- userID: The user whose cache to update
- feedID: The feed containing the article
- wasRead: Previous read status of the article
- nowRead: New read status of the article
Source Files