root
c1ef717d17
- shared/cache: add Options/L1/async/metrics/prefix decorators, multi-key ops, Redis pool tuning, and JSON readthrough metrics - worker-generate: claim tasks via DB lease + heartbeat, requeue stale queued tasks, expire dead leases with refund/cache invalidation - tenant: version article cache keys so worker recovery invalidations propagate cleanly - shared/config: expand Redis (pool/timeouts/TLS) and Generation (lease/recovery) configs with defaults Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
113 lines
2.3 KiB
Go
113 lines
2.3 KiB
Go
package cache
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import (
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"context"
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"errors"
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"fmt"
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"time"
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goredis "github.com/redis/go-redis/v9"
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)
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type redisCache struct {
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client *goredis.Client
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deleteScanCount int64
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}
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func newRedisCache(client *goredis.Client, deleteScanCount int64) Cache {
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return &redisCache{client: client, deleteScanCount: deleteScanCount}
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}
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func (c *redisCache) Get(ctx context.Context, key string) ([]byte, error) {
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val, err := c.client.Get(ctx, key).Bytes()
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if errors.Is(err, goredis.Nil) {
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return nil, ErrNotFound
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}
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return val, err
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}
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func (c *redisCache) GetMulti(ctx context.Context, keys []string) (map[string][]byte, error) {
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if len(keys) == 0 {
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return map[string][]byte{}, nil
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}
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values, err := c.client.MGet(ctx, keys...).Result()
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if err != nil {
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return nil, err
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}
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result := make(map[string][]byte, len(keys))
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for idx, value := range values {
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if value == nil {
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continue
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}
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switch typed := value.(type) {
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case string:
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result[keys[idx]] = []byte(typed)
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case []byte:
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dst := make([]byte, len(typed))
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copy(dst, typed)
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result[keys[idx]] = dst
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default:
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result[keys[idx]] = []byte(fmt.Sprint(value))
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}
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}
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return result, nil
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}
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func (c *redisCache) Set(ctx context.Context, key string, value []byte, ttl time.Duration) error {
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return c.client.Set(ctx, key, value, ttl).Err()
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}
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func (c *redisCache) SetMulti(ctx context.Context, items []Item) error {
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if len(items) == 0 {
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return nil
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}
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pipe := c.client.Pipeline()
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for _, item := range items {
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pipe.Set(ctx, item.Key, item.Value, item.TTL)
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}
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_, err := pipe.Exec(ctx)
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return err
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}
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func (c *redisCache) Delete(ctx context.Context, key string) error {
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return c.client.Del(ctx, key).Err()
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}
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func (c *redisCache) DeleteMany(ctx context.Context, keys []string) error {
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if len(keys) == 0 {
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return nil
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}
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return c.client.Del(ctx, keys...).Err()
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}
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func (c *redisCache) DeletePrefix(ctx 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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pattern := prefix + "*"
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scanCount := c.deleteScanCount
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if scanCount <= 0 {
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scanCount = defaultDeleteScanCount
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}
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var cursor uint64
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for {
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keys, nextCursor, err := c.client.Scan(ctx, cursor, pattern, scanCount).Result()
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if err != nil {
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return err
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}
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if len(keys) > 0 {
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if err := c.DeleteMany(ctx, keys); err != nil {
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return err
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}
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}
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cursor = nextCursor
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if cursor == 0 {
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return nil
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}
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}
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}
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