session consumer query함수 리턴 값의 애매함을 제거

session/impl_redis.go

@@ -2,6 +2,7 @@ package session
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"time"
 
@@ -243,46 +244,49 @@ func (c *consumer_redis) query_internal(sk storagekey) (*sessionRedis, error) {
 		expireAt:      time.Now().Add(ttl),
 	}
 
-	if auth.Invalidated() {
-		c.stages[0].deleted[sk] = si
-	} else {
+	if auth.Valid() {
 		c.add_internal(sk, si)
+	} else {
+		c.stages[0].deleted[sk] = si
 	}
 
 	return si, nil
 }
 
-func (c *consumer_redis) Query(pk string) (Authorization, error) {
+var errRevoked = errors.New("session revoked")
+var errExpired = errors.New("session expired")
+
+func (c *consumer_redis) Query(pk string) Authorization {
 	c.lock.Lock()
 	defer c.lock.Unlock()
 
 	sk := publickey_to_storagekey(publickey(pk))
 
 	if _, deleted := c.stages[0].deleted[sk]; deleted {
-		return Authorization{}, nil
+		return Authorization{}
 	}
 
 	if _, deleted := c.stages[1].deleted[sk]; deleted {
-		return Authorization{}, nil
+		return Authorization{}
 	}
 
 	si, err := c.query_internal(sk)
 	if err != nil {
 		logger.Println("session consumer query :", pk, err)
-		return Authorization{}, err
+		return Authorization{}
 	}
 
 	if si == nil {
 		logger.Println("session consumer query(si nil) :", pk, nil)
-		return Authorization{}, nil
+		return Authorization{}
 	}
 
 	if time.Now().After(si.expireAt) {
 		logger.Println("session consumer query(expired):", pk, nil)
-		return Authorization{}, nil
+		return Authorization{}
 	}
 
-	return *si.Authorization, nil
+	return *si.Authorization
 }
 
 func (c *consumer_redis) Touch(pk string) (Authorization, error) {