remove MaxAgeSeconds from redis sessiondb - now it derives from the sessions configuration automatically. Add option to use an existing BoltDB connection on boltdb sessiondb.

TODO: leveldb sessiondb

Former-commit-id: 8cb781bf089ab7b9a09dccc633454db9c6077610

sessions/sessiondb/redis/database.go

@@ -1,6 +1,8 @@
 package redis
 
 import (
+	"runtime"
+
 	"github.com/kataras/golog"
 	"github.com/kataras/iris/sessions"
 	"github.com/kataras/iris/sessions/sessiondb/redis/service"
@@ -14,10 +16,9 @@ type Database struct {
 
 // New returns a new redis database.
 func New(cfg ...service.Config) *Database {
-	return &Database{redis: service.New(cfg...)}
-	// Note: no need to clean up here, the redis should handle these automatically because of the "SETEX"
-	// but that expiration doesn't depend on the session, instead it depends on the `MaxAgeSeconds`
-	// of the redis database configuration.
+	db := &Database{redis: service.New(cfg...)}
+	runtime.SetFinalizer(db, closeDB)
+	return db
 }
 
 // Config returns the configuration for the redis server bridge, you can change them.
@@ -83,5 +84,14 @@ func (db *Database) sync(p sessions.SyncPayload) {
 		return
 	}
 
-	db.redis.Set(p.SessionID, storeB)
+	db.redis.Set(p.SessionID, storeB, p.Store.Lifetime.Second())
+}
+
+// Close shutdowns the redis connection.
+func (db *Database) Close() error {
+	return closeDB(db)
+}
+
+func closeDB(db *Database) error {
+	return db.redis.CloseConnection()
 }

sessions/sessiondb/redis/service/config.go

@@ -33,21 +33,18 @@ type Config struct {
 	IdleTimeout time.Duration
 	// Prefix "myprefix-for-this-website". Default ""
 	Prefix string
-	// MaxAgeSeconds how much long the redis should keep the session in seconds. Default 31556926.0 (1 year)
-	MaxAgeSeconds int
 }
 
 // DefaultConfig returns the default configuration for Redis service.
 func DefaultConfig() Config {
 	return Config{
-		Network:       DefaultRedisNetwork,
-		Addr:          DefaultRedisAddr,
-		Password:      "",
-		Database:      "",
-		MaxIdle:       0,
-		MaxActive:     0,
-		IdleTimeout:   DefaultRedisIdleTimeout,
-		Prefix:        "",
-		MaxAgeSeconds: DefaultRedisMaxAgeSeconds,
+		Network:     DefaultRedisNetwork,
+		Addr:        DefaultRedisAddr,
+		Password:    "",
+		Database:    "",
+		MaxIdle:     0,
+		MaxActive:   0,
+		IdleTimeout: DefaultRedisIdleTimeout,
+		Prefix:      "",
 	}
 }

sessions/sessiondb/redis/service/service.go

@@ -44,15 +44,21 @@ func (r *Service) CloseConnection() error {
 
 // Set sets a key-value to the redis store.
 // The expiration is setted by the MaxAgeSeconds.
-func (r *Service) Set(key string, value interface{}) error {
+func (r *Service) Set(key string, value interface{}, secondsLifetime int) (err error) {
 	c := r.pool.Get()
 	defer c.Close()
 	if c.Err() != nil {
 		return c.Err()
 	}
 
-	_, err := c.Do("SETEX", r.Config.Prefix+key, r.Config.MaxAgeSeconds, value)
-	return err
+	// if has expiration, then use the "EX" to delete the key automatically.
+	if secondsLifetime > 0 {
+		_, err = c.Do("SETEX", r.Config.Prefix+key, secondsLifetime, value)
+	} else {
+		_, err = c.Do("SET", r.Config.Prefix+key, value)
+	}
+
+	return
 }
 
 // Get returns value, err by its key
@@ -164,10 +170,6 @@ func (r *Service) Connect() {
 		c.Addr = DefaultRedisAddr
 	}
 
-	if c.MaxAgeSeconds <= 0 {
-		c.MaxAgeSeconds = DefaultRedisMaxAgeSeconds
-	}
-
 	pool := &redis.Pool{IdleTimeout: DefaultRedisIdleTimeout, MaxIdle: c.MaxIdle, MaxActive: c.MaxActive}
 	pool.TestOnBorrow = func(c redis.Conn, t time.Time) error {
 		_, err := c.Do("PING")