root
1538a12042
Introduce a generic read-through caching infrastructure and wire it into all major tenant app services to reduce database load on hot read paths. Key changes: - Add `DeletePrefix` to Cache interface with memory (prefix scan) and Redis (SCAN + DEL) implementations - New `readthrough.go`: generic `LoadJSON` / `LoadJSONWithEmpty` helpers backed by singleflight to prevent cache stampedes; supports jittered TTL - New `cache_support.go`: centralized cache key builders and invalidation helpers for all entities (workspace, brand, prompt rules, schedule tasks, articles) - Wire optional cache into ArticleService, BrandService, WorkspaceService, PromptRuleService, ScheduleTaskService, TemplateService, MediaService, PromptGenerateService via `WithCache()` builder pattern - ScheduleDispatchWorker invalidates schedule task cache after dispatching - ArticleService gains a new `Detail` endpoint with empty-result caching - Update cmd entrypoints and transport handlers to propagate cache
90 lines
1.6 KiB
Go
90 lines
1.6 KiB
Go
package cache
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import (
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"context"
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"sync"
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"time"
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)
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type memoryEntry struct {
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data []byte
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expiresAt time.Time
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}
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type memoryCache struct {
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mu sync.RWMutex
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entries map[string]memoryEntry
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}
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func newMemoryCache() Cache {
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c := &memoryCache{entries: make(map[string]memoryEntry)}
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go c.evictLoop()
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return c
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}
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func (c *memoryCache) Get(_ context.Context, key string) ([]byte, error) {
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c.mu.RLock()
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entry, ok := c.entries[key]
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c.mu.RUnlock()
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if !ok || time.Now().After(entry.expiresAt) {
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if ok {
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c.mu.Lock()
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delete(c.entries, key)
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c.mu.Unlock()
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}
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return nil, ErrNotFound
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}
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dst := make([]byte, len(entry.data))
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copy(dst, entry.data)
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return dst, nil
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}
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func (c *memoryCache) Set(_ context.Context, key string, value []byte, ttl time.Duration) error {
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dst := make([]byte, len(value))
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copy(dst, value)
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c.mu.Lock()
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c.entries[key] = memoryEntry{data: dst, expiresAt: time.Now().Add(ttl)}
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c.mu.Unlock()
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return nil
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}
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func (c *memoryCache) Delete(_ context.Context, key string) error {
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c.mu.Lock()
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delete(c.entries, key)
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c.mu.Unlock()
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return nil
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}
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func (c *memoryCache) DeletePrefix(_ context.Context, prefix string) error {
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if prefix == "" {
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return nil
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}
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c.mu.Lock()
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for key := range c.entries {
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if len(key) >= len(prefix) && key[:len(prefix)] == prefix {
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delete(c.entries, key)
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}
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}
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c.mu.Unlock()
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return nil
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}
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func (c *memoryCache) evictLoop() {
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ticker := time.NewTicker(60 * time.Second)
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defer ticker.Stop()
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for range ticker.C {
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now := time.Now()
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c.mu.Lock()
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for k, v := range c.entries {
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if now.After(v.expiresAt) {
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delete(c.entries, k)
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}
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}
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c.mu.Unlock()
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}
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}
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