Mercurial > gemma
view auth/connection.go @ 204:3d0988d9f867
De-virtualize the connection pool implementation.
The persistent connection pool implementation is
a superset of the in-memory implementation. The only
diffence in fact is that the in-memory variant does not
store anything to file. So the persistent implementation
is refactored in a way that it checks before each
persistence operation if storage is given or not.
author | Sascha L. Teichmann <teichmann@intevation.de> |
---|---|
date | Sun, 22 Jul 2018 10:23:03 +0200 |
parents | c20e86a3c073 |
children | f345edb409b2 |
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package auth import ( "database/sql" "encoding/binary" "errors" "io" "log" "sync" "time" "gemma.intevation.de/gemma/config" ) var ErrNoSuchToken = errors.New("No such token") var ConnPool = func() *ConnectionPool { cp, err := NewConnectionPool(config.Config.SessionStore) if err != nil { log.Panicf("Error with session store: %v\n", err) } return cp }() const ( maxOpen = 16 maxDBIdle = time.Minute * 5 ) type Connection struct { session *Session access time.Time db *sql.DB refCount int mu sync.Mutex } func (c *Connection) serialize(w io.Writer) error { if err := c.session.serialize(w); err != nil { return err } access, err := c.last().MarshalText() if err == nil { err = binary.Write(w, binary.BigEndian, string(access)) } return err } func (c *Connection) deserialize(r io.Reader) error { session := new(Session) if err := session.deserialize(r); err != nil { return err } var access string if err := binary.Read(r, binary.BigEndian, &access); err != nil { return err } var t time.Time if err := t.UnmarshalText([]byte(access)); err != nil { return err } *c = Connection{ session: session, access: t, } return nil } func (c *Connection) set(session *Session) { c.session = session c.touch() } func (c *Connection) touch() { c.mu.Lock() c.access = time.Now() c.mu.Unlock() } func (c *Connection) last() time.Time { c.mu.Lock() access := c.access c.mu.Unlock() return access } func (c *Connection) close() { if c.db != nil { if err := c.db.Close(); err != nil { log.Printf("warn: %v\n", err) } c.db = nil } }