279 lines
7.2 KiB
Go
279 lines
7.2 KiB
Go
package repository
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import (
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"context"
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"encoding/json"
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"fmt"
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"strconv"
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"time"
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"github.com/Wei-Shaw/sub2api/internal/service"
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"github.com/redis/go-redis/v9"
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)
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const (
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schedulerBucketSetKey = "sched:buckets"
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schedulerOutboxWatermarkKey = "sched:outbox:watermark"
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schedulerAccountPrefix = "sched:acc:"
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schedulerActivePrefix = "sched:active:"
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schedulerReadyPrefix = "sched:ready:"
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schedulerVersionPrefix = "sched:ver:"
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schedulerSnapshotPrefix = "sched:"
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schedulerLockPrefix = "sched:lock:"
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)
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type schedulerCache struct {
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rdb *redis.Client
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}
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func NewSchedulerCache(rdb *redis.Client) service.SchedulerCache {
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return &schedulerCache{rdb: rdb}
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}
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func (c *schedulerCache) GetSnapshot(ctx context.Context, bucket service.SchedulerBucket) ([]*service.Account, bool, error) {
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readyKey := schedulerBucketKey(schedulerReadyPrefix, bucket)
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readyVal, err := c.rdb.Get(ctx, readyKey).Result()
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if err == redis.Nil {
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return nil, false, nil
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}
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if err != nil {
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return nil, false, err
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}
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if readyVal != "1" {
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return nil, false, nil
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}
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activeKey := schedulerBucketKey(schedulerActivePrefix, bucket)
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activeVal, err := c.rdb.Get(ctx, activeKey).Result()
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if err == redis.Nil {
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return nil, false, nil
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}
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if err != nil {
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return nil, false, err
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}
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snapshotKey := schedulerSnapshotKey(bucket, activeVal)
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ids, err := c.rdb.ZRange(ctx, snapshotKey, 0, -1).Result()
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if err != nil {
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return nil, false, err
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}
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if len(ids) == 0 {
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// 空快照视为缓存未命中，触发数据库回退查询
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// 这解决了新分组创建后立即绑定账号时的竞态条件问题
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return nil, false, nil
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}
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keys := make([]string, 0, len(ids))
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for _, id := range ids {
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keys = append(keys, schedulerAccountKey(id))
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}
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values, err := c.rdb.MGet(ctx, keys...).Result()
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if err != nil {
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return nil, false, err
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}
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accounts := make([]*service.Account, 0, len(values))
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for _, val := range values {
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if val == nil {
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return nil, false, nil
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}
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account, err := decodeCachedAccount(val)
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if err != nil {
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return nil, false, err
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}
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accounts = append(accounts, account)
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}
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return accounts, true, nil
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}
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func (c *schedulerCache) SetSnapshot(ctx context.Context, bucket service.SchedulerBucket, accounts []service.Account) error {
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activeKey := schedulerBucketKey(schedulerActivePrefix, bucket)
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oldActive, _ := c.rdb.Get(ctx, activeKey).Result()
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versionKey := schedulerBucketKey(schedulerVersionPrefix, bucket)
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version, err := c.rdb.Incr(ctx, versionKey).Result()
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if err != nil {
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return err
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}
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versionStr := strconv.FormatInt(version, 10)
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snapshotKey := schedulerSnapshotKey(bucket, versionStr)
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pipe := c.rdb.Pipeline()
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for _, account := range accounts {
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payload, err := json.Marshal(account)
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if err != nil {
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return err
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}
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pipe.Set(ctx, schedulerAccountKey(strconv.FormatInt(account.ID, 10)), payload, 0)
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}
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if len(accounts) > 0 {
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// 使用序号作为 score，保持数据库返回的排序语义。
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members := make([]redis.Z, 0, len(accounts))
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for idx, account := range accounts {
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members = append(members, redis.Z{
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Score: float64(idx),
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Member: strconv.FormatInt(account.ID, 10),
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})
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}
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pipe.ZAdd(ctx, snapshotKey, members...)
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} else {
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pipe.Del(ctx, snapshotKey)
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}
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pipe.Set(ctx, activeKey, versionStr, 0)
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pipe.Set(ctx, schedulerBucketKey(schedulerReadyPrefix, bucket), "1", 0)
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pipe.SAdd(ctx, schedulerBucketSetKey, bucket.String())
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if _, err := pipe.Exec(ctx); err != nil {
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return err
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}
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if oldActive != "" && oldActive != versionStr {
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_ = c.rdb.Del(ctx, schedulerSnapshotKey(bucket, oldActive)).Err()
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}
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return nil
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}
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func (c *schedulerCache) GetAccount(ctx context.Context, accountID int64) (*service.Account, error) {
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key := schedulerAccountKey(strconv.FormatInt(accountID, 10))
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val, err := c.rdb.Get(ctx, key).Result()
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if err == redis.Nil {
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return nil, nil
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}
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if err != nil {
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return nil, err
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}
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return decodeCachedAccount(val)
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}
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func (c *schedulerCache) SetAccount(ctx context.Context, account *service.Account) error {
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if account == nil || account.ID <= 0 {
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return nil
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}
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payload, err := json.Marshal(account)
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if err != nil {
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return err
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}
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key := schedulerAccountKey(strconv.FormatInt(account.ID, 10))
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return c.rdb.Set(ctx, key, payload, 0).Err()
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}
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func (c *schedulerCache) DeleteAccount(ctx context.Context, accountID int64) error {
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if accountID <= 0 {
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return nil
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}
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key := schedulerAccountKey(strconv.FormatInt(accountID, 10))
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return c.rdb.Del(ctx, key).Err()
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}
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func (c *schedulerCache) UpdateLastUsed(ctx context.Context, updates map[int64]time.Time) error {
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if len(updates) == 0 {
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return nil
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}
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keys := make([]string, 0, len(updates))
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ids := make([]int64, 0, len(updates))
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for id := range updates {
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keys = append(keys, schedulerAccountKey(strconv.FormatInt(id, 10)))
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ids = append(ids, id)
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}
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values, err := c.rdb.MGet(ctx, keys...).Result()
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if err != nil {
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return err
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}
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pipe := c.rdb.Pipeline()
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for i, val := range values {
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if val == nil {
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continue
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}
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account, err := decodeCachedAccount(val)
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if err != nil {
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return err
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}
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account.LastUsedAt = ptrTime(updates[ids[i]])
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updated, err := json.Marshal(account)
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if err != nil {
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return err
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}
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pipe.Set(ctx, keys[i], updated, 0)
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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 *schedulerCache) TryLockBucket(ctx context.Context, bucket service.SchedulerBucket, ttl time.Duration) (bool, error) {
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key := schedulerBucketKey(schedulerLockPrefix, bucket)
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return c.rdb.SetNX(ctx, key, time.Now().UnixNano(), ttl).Result()
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}
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func (c *schedulerCache) ListBuckets(ctx context.Context) ([]service.SchedulerBucket, error) {
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raw, err := c.rdb.SMembers(ctx, schedulerBucketSetKey).Result()
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if err != nil {
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return nil, err
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}
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out := make([]service.SchedulerBucket, 0, len(raw))
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for _, entry := range raw {
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bucket, ok := service.ParseSchedulerBucket(entry)
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if !ok {
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continue
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}
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out = append(out, bucket)
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}
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return out, nil
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}
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func (c *schedulerCache) GetOutboxWatermark(ctx context.Context) (int64, error) {
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val, err := c.rdb.Get(ctx, schedulerOutboxWatermarkKey).Result()
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if err == redis.Nil {
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return 0, nil
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}
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if err != nil {
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return 0, err
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}
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id, err := strconv.ParseInt(val, 10, 64)
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if err != nil {
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return 0, err
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}
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return id, nil
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}
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func (c *schedulerCache) SetOutboxWatermark(ctx context.Context, id int64) error {
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return c.rdb.Set(ctx, schedulerOutboxWatermarkKey, strconv.FormatInt(id, 10), 0).Err()
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}
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func schedulerBucketKey(prefix string, bucket service.SchedulerBucket) string {
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return fmt.Sprintf("%s%d:%s:%s", prefix, bucket.GroupID, bucket.Platform, bucket.Mode)
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}
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func schedulerSnapshotKey(bucket service.SchedulerBucket, version string) string {
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return fmt.Sprintf("%s%d:%s:%s:v%s", schedulerSnapshotPrefix, bucket.GroupID, bucket.Platform, bucket.Mode, version)
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}
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func schedulerAccountKey(id string) string {
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return schedulerAccountPrefix + id
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}
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func ptrTime(t time.Time) *time.Time {
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return &t
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}
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func decodeCachedAccount(val any) (*service.Account, error) {
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var payload []byte
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switch raw := val.(type) {
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case string:
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payload = []byte(raw)
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case []byte:
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payload = raw
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default:
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return nil, fmt.Errorf("unexpected account cache type: %T", val)
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}
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var account service.Account
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if err := json.Unmarshal(payload, &account); err != nil {
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return nil, err
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}
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return &account, nil
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}
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