You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
123 lines
3.2 KiB
Go
123 lines
3.2 KiB
Go
package sqlc
|
|
|
|
import (
|
|
"database/sql"
|
|
"time"
|
|
|
|
"github.com/tal-tech/go-zero/core/stores/cache"
|
|
"github.com/tal-tech/go-zero/core/stores/redis"
|
|
"github.com/tal-tech/go-zero/core/stores/sqlx"
|
|
"github.com/tal-tech/go-zero/core/syncx"
|
|
)
|
|
|
|
// see doc/sql-cache.md
|
|
const cacheSafeGapBetweenIndexAndPrimary = time.Second * 5
|
|
|
|
var (
|
|
ErrNotFound = sqlx.ErrNotFound
|
|
|
|
// can't use one SharedCalls per conn, because multiple conns may share the same cache key.
|
|
exclusiveCalls = syncx.NewSharedCalls()
|
|
stats = cache.NewCacheStat("sqlc")
|
|
)
|
|
|
|
type (
|
|
ExecFn func(conn sqlx.SqlConn) (sql.Result, error)
|
|
IndexQueryFn func(conn sqlx.SqlConn, v interface{}) (interface{}, error)
|
|
PrimaryQueryFn func(conn sqlx.SqlConn, v, primary interface{}) error
|
|
QueryFn func(conn sqlx.SqlConn, v interface{}) error
|
|
|
|
CachedConn struct {
|
|
db sqlx.SqlConn
|
|
cache cache.Cache
|
|
}
|
|
)
|
|
|
|
func NewNodeConn(db sqlx.SqlConn, rds *redis.Redis, opts ...cache.Option) CachedConn {
|
|
return CachedConn{
|
|
db: db,
|
|
cache: cache.NewCacheNode(rds, exclusiveCalls, stats, sql.ErrNoRows, opts...),
|
|
}
|
|
}
|
|
|
|
func NewConn(db sqlx.SqlConn, c cache.CacheConf, opts ...cache.Option) CachedConn {
|
|
return CachedConn{
|
|
db: db,
|
|
cache: cache.NewCache(c, exclusiveCalls, stats, sql.ErrNoRows, opts...),
|
|
}
|
|
}
|
|
|
|
func (cc CachedConn) DelCache(keys ...string) error {
|
|
return cc.cache.DelCache(keys...)
|
|
}
|
|
|
|
func (cc CachedConn) GetCache(key string, v interface{}) error {
|
|
return cc.cache.GetCache(key, v)
|
|
}
|
|
|
|
func (cc CachedConn) Exec(exec ExecFn, keys ...string) (sql.Result, error) {
|
|
res, err := exec(cc.db)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if err := cc.DelCache(keys...); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return res, nil
|
|
}
|
|
|
|
func (cc CachedConn) ExecNoCache(q string, args ...interface{}) (sql.Result, error) {
|
|
return cc.db.Exec(q, args...)
|
|
}
|
|
|
|
func (cc CachedConn) QueryRow(v interface{}, key string, query QueryFn) error {
|
|
return cc.cache.Take(v, key, func(v interface{}) error {
|
|
return query(cc.db, v)
|
|
})
|
|
}
|
|
|
|
func (cc CachedConn) QueryRowIndex(v interface{}, key string, keyer func(primary interface{}) string,
|
|
indexQuery IndexQueryFn, primaryQuery PrimaryQueryFn) error {
|
|
var primaryKey interface{}
|
|
var found bool
|
|
|
|
if err := cc.cache.TakeWithExpire(&primaryKey, key, func(val interface{}, expire time.Duration) (err error) {
|
|
primaryKey, err = indexQuery(cc.db, v)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
found = true
|
|
return cc.cache.SetCacheWithExpire(keyer(primaryKey), v, expire+cacheSafeGapBetweenIndexAndPrimary)
|
|
}); err != nil {
|
|
return err
|
|
}
|
|
|
|
if found {
|
|
return nil
|
|
}
|
|
|
|
return cc.cache.Take(v, keyer(primaryKey), func(v interface{}) error {
|
|
return primaryQuery(cc.db, v, primaryKey)
|
|
})
|
|
}
|
|
|
|
func (cc CachedConn) QueryRowNoCache(v interface{}, q string, args ...interface{}) error {
|
|
return cc.db.QueryRow(v, q, args...)
|
|
}
|
|
|
|
// QueryRowsNoCache doesn't use cache, because it might cause consistency problem.
|
|
func (cc CachedConn) QueryRowsNoCache(v interface{}, q string, args ...interface{}) error {
|
|
return cc.db.QueryRows(v, q, args...)
|
|
}
|
|
|
|
func (cc CachedConn) SetCache(key string, v interface{}) error {
|
|
return cc.cache.SetCache(key, v)
|
|
}
|
|
|
|
func (cc CachedConn) Transact(fn func(sqlx.Session) error) error {
|
|
return cc.db.Transact(fn)
|
|
}
|