129 lines
2.9 KiB
Go
129 lines
2.9 KiB
Go
package session
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import (
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"container/list"
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"sync"
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"time"
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)
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var mempder = &MemProvider{list: list.New(), sessions: make(map[string]*list.Element)}
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type MemSessionStore struct {
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sid string //session id唯一标示
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timeAccessed time.Time //最后访问时间
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value map[interface{}]interface{} //session里面存储的值
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lock sync.RWMutex
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}
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func (st *MemSessionStore) Set(key, value interface{}) error {
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st.lock.Lock()
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defer st.lock.Unlock()
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st.value[key] = value
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return nil
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}
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func (st *MemSessionStore) Get(key interface{}) interface{} {
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st.lock.RLock()
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defer st.lock.RUnlock()
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if v, ok := st.value[key]; ok {
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return v
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} else {
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return nil
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}
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return nil
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}
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func (st *MemSessionStore) Delete(key interface{}) error {
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st.lock.Lock()
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defer st.lock.Unlock()
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delete(st.value, key)
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return nil
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}
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func (st *MemSessionStore) SessionID() string {
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return st.sid
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}
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func (st *MemSessionStore) SessionRelease() {
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}
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type MemProvider struct {
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lock sync.RWMutex //用来锁
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sessions map[string]*list.Element //用来存储在内存
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list *list.List //用来做gc
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maxlifetime int64
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savePath string
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}
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func (pder *MemProvider) SessionInit(maxlifetime int64, savePath string) error {
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pder.maxlifetime = maxlifetime
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pder.savePath = savePath
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return nil
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}
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func (pder *MemProvider) SessionRead(sid string) (SessionStore, error) {
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pder.lock.RLock()
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if element, ok := pder.sessions[sid]; ok {
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go pder.SessionUpdate(sid)
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pder.lock.RUnlock()
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return element.Value.(*MemSessionStore), nil
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} else {
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pder.lock.RUnlock()
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pder.lock.Lock()
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newsess := &MemSessionStore{sid: sid, timeAccessed: time.Now(), value: make(map[interface{}]interface{})}
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element := pder.list.PushBack(newsess)
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pder.sessions[sid] = element
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pder.lock.Unlock()
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return newsess, nil
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}
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return nil, nil
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}
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func (pder *MemProvider) SessionDestroy(sid string) error {
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pder.lock.Lock()
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defer pder.lock.Unlock()
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if element, ok := pder.sessions[sid]; ok {
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delete(pder.sessions, sid)
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pder.list.Remove(element)
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return nil
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}
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return nil
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}
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func (pder *MemProvider) SessionGC() {
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pder.lock.RLock()
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for {
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element := pder.list.Back()
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if element == nil {
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break
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}
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if (element.Value.(*MemSessionStore).timeAccessed.Unix() + pder.maxlifetime) < time.Now().Unix() {
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pder.lock.RUnlock()
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pder.lock.Lock()
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pder.list.Remove(element)
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delete(pder.sessions, element.Value.(*MemSessionStore).sid)
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pder.lock.Unlock()
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pder.lock.RLock()
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} else {
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break
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}
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}
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pder.lock.RUnlock()
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}
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func (pder *MemProvider) SessionUpdate(sid string) error {
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pder.lock.Lock()
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defer pder.lock.Unlock()
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if element, ok := pder.sessions[sid]; ok {
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element.Value.(*MemSessionStore).timeAccessed = time.Now()
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pder.list.MoveToFront(element)
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return nil
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}
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return nil
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}
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func init() {
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Register("memory", mempder)
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}
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