diff --git a/cache/cache.go b/cache/cache.go
index 7ca87802..6413e210 100644
--- a/cache/cache.go
+++ b/cache/cache.go
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// Package cache provide a Cache interface and some implemetn engine
 // Usage:
 //
 // import(
@@ -80,7 +81,7 @@ func Register(name string, adapter Cache) {
 	adapters[name] = adapter
 }
 
-// Create a new cache driver by adapter name and config string.
+// NewCache Create a new cache driver by adapter name and config string.
 // config need to be correct JSON as string: {"interval":360}.
 // it will start gc automatically.
 func NewCache(adapterName, config string) (adapter Cache, err error) {
diff --git a/cache/conv.go b/cache/conv.go
index 724abfd2..16ef1106 100644
--- a/cache/conv.go
+++ b/cache/conv.go
@@ -19,7 +19,7 @@ import (
 	"strconv"
 )
 
-// convert interface to string.
+// GetString convert interface to string.
 func GetString(v interface{}) string {
 	switch result := v.(type) {
 	case string:
@@ -34,7 +34,7 @@ func GetString(v interface{}) string {
 	return ""
 }
 
-// convert interface to int.
+// GetInt convert interface to int.
 func GetInt(v interface{}) int {
 	switch result := v.(type) {
 	case int:
@@ -52,7 +52,7 @@ func GetInt(v interface{}) int {
 	return 0
 }
 
-// convert interface to int64.
+// GetInt64 convert interface to int64.
 func GetInt64(v interface{}) int64 {
 	switch result := v.(type) {
 	case int:
@@ -71,7 +71,7 @@ func GetInt64(v interface{}) int64 {
 	return 0
 }
 
-// convert interface to float64.
+// GetFloat64 convert interface to float64.
 func GetFloat64(v interface{}) float64 {
 	switch result := v.(type) {
 	case float64:
@@ -85,7 +85,7 @@ func GetFloat64(v interface{}) float64 {
 	return 0
 }
 
-// convert interface to bool.
+// GetBool convert interface to bool.
 func GetBool(v interface{}) bool {
 	switch result := v.(type) {
 	case bool:
@@ -99,7 +99,7 @@ func GetBool(v interface{}) bool {
 	return false
 }
 
-// convert interface to byte slice.
+// getByteArray convert interface to byte slice.
 func getByteArray(v interface{}) []byte {
 	switch result := v.(type) {
 	case []byte:
diff --git a/cache/conv_test.go b/cache/conv_test.go
index 267bb0c9..c87ffe84 100644
--- a/cache/conv_test.go
+++ b/cache/conv_test.go
@@ -27,7 +27,7 @@ func TestGetString(t *testing.T) {
 	if "test2" != GetString(t2) {
 		t.Error("get string from byte array error")
 	}
-	var t3 int = 1
+	var t3 = 1
 	if "1" != GetString(t3) {
 		t.Error("get string from int error")
 	}
@@ -35,7 +35,7 @@ func TestGetString(t *testing.T) {
 	if "1" != GetString(t4) {
 		t.Error("get string from int64 error")
 	}
-	var t5 float64 = 1.1
+	var t5 = 1.1
 	if "1.1" != GetString(t5) {
 		t.Error("get string from float64 error")
 	}
@@ -46,7 +46,7 @@ func TestGetString(t *testing.T) {
 }
 
 func TestGetInt(t *testing.T) {
-	var t1 int = 1
+	var t1 = 1
 	if 1 != GetInt(t1) {
 		t.Error("get int from int error")
 	}
@@ -69,7 +69,7 @@ func TestGetInt(t *testing.T) {
 
 func TestGetInt64(t *testing.T) {
 	var i int64 = 1
-	var t1 int = 1
+	var t1 = 1
 	if i != GetInt64(t1) {
 		t.Error("get int64 from int error")
 	}
@@ -91,12 +91,12 @@ func TestGetInt64(t *testing.T) {
 }
 
 func TestGetFloat64(t *testing.T) {
-	var f float64 = 1.11
+	var f = 1.11
 	var t1 float32 = 1.11
 	if f != GetFloat64(t1) {
 		t.Error("get float64 from float32 error")
 	}
-	var t2 float64 = 1.11
+	var t2 = 1.11
 	if f != GetFloat64(t2) {
 		t.Error("get float64 from float64 error")
 	}
@@ -106,7 +106,7 @@ func TestGetFloat64(t *testing.T) {
 	}
 
 	var f2 float64 = 1
-	var t4 int = 1
+	var t4 = 1
 	if f2 != GetFloat64(t4) {
 		t.Error("get float64 from int error")
 	}
diff --git a/cache/file.go b/cache/file.go
index 65f114f3..9233a852 100644
--- a/cache/file.go
+++ b/cache/file.go
@@ -41,11 +41,12 @@ type FileCacheItem struct {
 	Expired    int64
 }
 
+// FileCache Config
 var (
-	FileCachePath           string = "cache" // cache directory
-	FileCacheFileSuffix     string = ".bin"  // cache file suffix
-	FileCacheDirectoryLevel int    = 2       // cache file deep level if auto generated cache files.
-	FileCacheEmbedExpiry    int64  = 0       // cache expire time, default is no expire forever.
+	FileCachePath           = "cache" // cache directory
+	FileCacheFileSuffix     = ".bin"  // cache file suffix
+	FileCacheDirectoryLevel = 2       // cache file deep level if auto generated cache files.
+	FileCacheEmbedExpiry    int64     // cache expire time, default is no expire forever.
 )
 
 // FileCache is cache adapter for file storage.
@@ -56,14 +57,14 @@ type FileCache struct {
 	EmbedExpiry    int
 }
 
-// Create new file cache with no config.
+// NewFileCache Create new file cache with no config.
 // the level and expiry need set in method StartAndGC as config string.
 func NewFileCache() *FileCache {
 	//    return &FileCache{CachePath:FileCachePath, FileSuffix:FileCacheFileSuffix}
 	return &FileCache{}
 }
 
-// Start and begin gc for file cache.
+// StartAndGC will start and begin gc for file cache.
 // the config need to be like {CachePath:"/cache","FileSuffix":".bin","DirectoryLevel":2,"EmbedExpiry":0}
 func (fc *FileCache) StartAndGC(config string) error {
 
@@ -120,12 +121,12 @@ func (fc *FileCache) getCacheFileName(key string) string {
 // Get value from file cache.
 // if non-exist or expired, return empty string.
 func (fc *FileCache) Get(key string) interface{} {
-	fileData, err := File_get_contents(fc.getCacheFileName(key))
+	fileData, err := FileGetContents(fc.getCacheFileName(key))
 	if err != nil {
 		return ""
 	}
 	var to FileCacheItem
-	Gob_decode(fileData, &to)
+	GobDecode(fileData, &to)
 	if to.Expired < time.Now().Unix() {
 		return ""
 	}
@@ -155,11 +156,11 @@ func (fc *FileCache) Put(key string, val interface{}, timeout int64) error {
 		item.Expired = time.Now().Unix() + timeout
 	}
 	item.Lastaccess = time.Now().Unix()
-	data, err := Gob_encode(item)
+	data, err := GobEncode(item)
 	if err != nil {
 		return err
 	}
-	return File_put_contents(fc.getCacheFileName(key), data)
+	return FilePutContents(fc.getCacheFileName(key), data)
 }
 
 // Delete file cache value.
@@ -171,7 +172,7 @@ func (fc *FileCache) Delete(key string) error {
 	return nil
 }
 
-// Increase cached int value.
+// Incr will increase cached int value.
 // fc value is saving forever unless Delete.
 func (fc *FileCache) Incr(key string) error {
 	data := fc.Get(key)
@@ -185,7 +186,7 @@ func (fc *FileCache) Incr(key string) error {
 	return nil
 }
 
-// Decrease cached int value.
+// Decr will decrease cached int value.
 func (fc *FileCache) Decr(key string) error {
 	data := fc.Get(key)
 	var decr int
@@ -198,13 +199,13 @@ func (fc *FileCache) Decr(key string) error {
 	return nil
 }
 
-// Check value is exist.
+// IsExist check value is exist.
 func (fc *FileCache) IsExist(key string) bool {
 	ret, _ := exists(fc.getCacheFileName(key))
 	return ret
 }
 
-// Clean cached files.
+// ClearAll will clean cached files.
 // not implemented.
 func (fc *FileCache) ClearAll() error {
 	return nil
@@ -222,9 +223,9 @@ func exists(path string) (bool, error) {
 	return false, err
 }
 
-// Get bytes to file.
+// FileGetContents Get bytes to file.
 // if non-exist, create this file.
-func File_get_contents(filename string) (data []byte, e error) {
+func FileGetContents(filename string) (data []byte, e error) {
 	f, e := os.OpenFile(filename, os.O_RDWR|os.O_CREATE, os.ModePerm)
 	if e != nil {
 		return
@@ -242,9 +243,9 @@ func File_get_contents(filename string) (data []byte, e error) {
 	return
 }
 
-// Put bytes to file.
+// FilePutContents Put bytes to file.
 // if non-exist, create this file.
-func File_put_contents(filename string, content []byte) error {
+func FilePutContents(filename string, content []byte) error {
 	fp, err := os.OpenFile(filename, os.O_RDWR|os.O_CREATE, os.ModePerm)
 	if err != nil {
 		return err
@@ -254,8 +255,8 @@ func File_put_contents(filename string, content []byte) error {
 	return err
 }
 
-// Gob encodes file cache item.
-func Gob_encode(data interface{}) ([]byte, error) {
+// GobEncode Gob encodes file cache item.
+func GobEncode(data interface{}) ([]byte, error) {
 	buf := bytes.NewBuffer(nil)
 	enc := gob.NewEncoder(buf)
 	err := enc.Encode(data)
@@ -265,8 +266,8 @@ func Gob_encode(data interface{}) ([]byte, error) {
 	return buf.Bytes(), err
 }
 
-// Gob decodes file cache item.
-func Gob_decode(data []byte, to *FileCacheItem) error {
+// GobDecode Gob decodes file cache item.
+func GobDecode(data []byte, to *FileCacheItem) error {
 	buf := bytes.NewBuffer(data)
 	dec := gob.NewDecoder(buf)
 	return dec.Decode(&to)
diff --git a/cache/memcache/memcache.go b/cache/memcache/memcache.go
index c6829054..643fb130 100644
--- a/cache/memcache/memcache.go
+++ b/cache/memcache/memcache.go
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// package memcahe for cache provider
+// Package memcache for cache provider
 //
 // depend on github.com/bradfitz/gomemcache/memcache
 //
@@ -39,19 +39,19 @@ import (
 	"github.com/astaxie/beego/cache"
 )
 
-// Memcache adapter.
-type MemcacheCache struct {
+// Cache Memcache adapter.
+type Cache struct {
 	conn     *memcache.Client
 	conninfo []string
 }
 
-// create new memcache adapter.
-func NewMemCache() *MemcacheCache {
-	return &MemcacheCache{}
+// NewMemCache create new memcache adapter.
+func NewMemCache() *Cache {
+	return &Cache{}
 }
 
-// get value from memcache.
-func (rc *MemcacheCache) Get(key string) interface{} {
+// Get get value from memcache.
+func (rc *Cache) Get(key string) interface{} {
 	if rc.conn == nil {
 		if err := rc.connectInit(); err != nil {
 			return err
@@ -63,8 +63,8 @@ func (rc *MemcacheCache) Get(key string) interface{} {
 	return nil
 }
 
-// get value from memcache.
-func (rc *MemcacheCache) GetMulti(keys []string) []interface{} {
+// GetMulti get value from memcache.
+func (rc *Cache) GetMulti(keys []string) []interface{} {
 	size := len(keys)
 	var rv []interface{}
 	if rc.conn == nil {
@@ -81,16 +81,15 @@ func (rc *MemcacheCache) GetMulti(keys []string) []interface{} {
 			rv = append(rv, string(v.Value))
 		}
 		return rv
-	} else {
-		for i := 0; i < size; i++ {
-			rv = append(rv, err)
-		}
-		return rv
 	}
+	for i := 0; i < size; i++ {
+		rv = append(rv, err)
+	}
+	return rv
 }
 
-// put value to memcache. only support string.
-func (rc *MemcacheCache) Put(key string, val interface{}, timeout int64) error {
+// Put put value to memcache. only support string.
+func (rc *Cache) Put(key string, val interface{}, timeout int64) error {
 	if rc.conn == nil {
 		if err := rc.connectInit(); err != nil {
 			return err
@@ -104,8 +103,8 @@ func (rc *MemcacheCache) Put(key string, val interface{}, timeout int64) error {
 	return rc.conn.Set(&item)
 }
 
-// delete value in memcache.
-func (rc *MemcacheCache) Delete(key string) error {
+// Delete delete value in memcache.
+func (rc *Cache) Delete(key string) error {
 	if rc.conn == nil {
 		if err := rc.connectInit(); err != nil {
 			return err
@@ -114,8 +113,8 @@ func (rc *MemcacheCache) Delete(key string) error {
 	return rc.conn.Delete(key)
 }
 
-// increase counter.
-func (rc *MemcacheCache) Incr(key string) error {
+// Incr increase counter.
+func (rc *Cache) Incr(key string) error {
 	if rc.conn == nil {
 		if err := rc.connectInit(); err != nil {
 			return err
@@ -125,8 +124,8 @@ func (rc *MemcacheCache) Incr(key string) error {
 	return err
 }
 
-// decrease counter.
-func (rc *MemcacheCache) Decr(key string) error {
+// Decr decrease counter.
+func (rc *Cache) Decr(key string) error {
 	if rc.conn == nil {
 		if err := rc.connectInit(); err != nil {
 			return err
@@ -136,8 +135,8 @@ func (rc *MemcacheCache) Decr(key string) error {
 	return err
 }
 
-// check value exists in memcache.
-func (rc *MemcacheCache) IsExist(key string) bool {
+// IsExist check value exists in memcache.
+func (rc *Cache) IsExist(key string) bool {
 	if rc.conn == nil {
 		if err := rc.connectInit(); err != nil {
 			return false
@@ -150,8 +149,8 @@ func (rc *MemcacheCache) IsExist(key string) bool {
 	return true
 }
 
-// clear all cached in memcache.
-func (rc *MemcacheCache) ClearAll() error {
+// ClearAll clear all cached in memcache.
+func (rc *Cache) ClearAll() error {
 	if rc.conn == nil {
 		if err := rc.connectInit(); err != nil {
 			return err
@@ -160,10 +159,10 @@ func (rc *MemcacheCache) ClearAll() error {
 	return rc.conn.FlushAll()
 }
 
-// start memcache adapter.
+// StartAndGC start memcache adapter.
 // config string is like {"conn":"connection info"}.
 // if connecting error, return.
-func (rc *MemcacheCache) StartAndGC(config string) error {
+func (rc *Cache) StartAndGC(config string) error {
 	var cf map[string]string
 	json.Unmarshal([]byte(config), &cf)
 	if _, ok := cf["conn"]; !ok {
@@ -179,7 +178,7 @@ func (rc *MemcacheCache) StartAndGC(config string) error {
 }
 
 // connect to memcache and keep the connection.
-func (rc *MemcacheCache) connectInit() error {
+func (rc *Cache) connectInit() error {
 	rc.conn = memcache.New(rc.conninfo...)
 	return nil
 }
diff --git a/cache/memory.go b/cache/memory.go
index b6657048..ce1afa5f 100644
--- a/cache/memory.go
+++ b/cache/memory.go
@@ -23,18 +23,18 @@ import (
 )
 
 var (
-	// clock time of recycling the expired cache items in memory.
-	DefaultEvery int = 60 // 1 minute
+	// DefaultEvery means the clock time of recycling the expired cache items in memory.
+	DefaultEvery = 60 // 1 minute
 )
 
-// Memory cache item.
+// MemoryItem store enery cache item.
 type MemoryItem struct {
 	val        interface{}
 	Lastaccess time.Time
 	expired    int64
 }
 
-// Memory cache adapter.
+// MemoryCache is Memory cache adapter.
 // it contains a RW locker for safe map storage.
 type MemoryCache struct {
 	lock  sync.RWMutex
@@ -87,7 +87,7 @@ func (bc *MemoryCache) Put(name string, value interface{}, expired int64) error
 	return nil
 }
 
-/// Delete cache in memory.
+// Delete cache in memory.
 func (bc *MemoryCache) Delete(name string) error {
 	bc.lock.Lock()
 	defer bc.lock.Unlock()
@@ -101,7 +101,7 @@ func (bc *MemoryCache) Delete(name string) error {
 	return nil
 }
 
-// Increase cache counter in memory.
+// Incr increase cache counter in memory.
 // it supports int,int64,int32,uint,uint64,uint32.
 func (bc *MemoryCache) Incr(key string) error {
 	bc.lock.RLock()
@@ -129,7 +129,7 @@ func (bc *MemoryCache) Incr(key string) error {
 	return nil
 }
 
-// Decrease counter in memory.
+// Decr decrease counter in memory.
 func (bc *MemoryCache) Decr(key string) error {
 	bc.lock.RLock()
 	defer bc.lock.RUnlock()
@@ -168,7 +168,7 @@ func (bc *MemoryCache) Decr(key string) error {
 	return nil
 }
 
-// check cache exist in memory.
+// IsExist check cache exist in memory.
 func (bc *MemoryCache) IsExist(name string) bool {
 	bc.lock.RLock()
 	defer bc.lock.RUnlock()
@@ -176,7 +176,7 @@ func (bc *MemoryCache) IsExist(name string) bool {
 	return ok
 }
 
-// delete all cache in memory.
+// ClearAll will delete all cache in memory.
 func (bc *MemoryCache) ClearAll() error {
 	bc.lock.Lock()
 	defer bc.lock.Unlock()
@@ -184,7 +184,7 @@ func (bc *MemoryCache) ClearAll() error {
 	return nil
 }
 
-// start memory cache. it will check expiration in every clock time.
+// StartAndGC start memory cache. it will check expiration in every clock time.
 func (bc *MemoryCache) StartAndGC(config string) error {
 	var cf map[string]int
 	json.Unmarshal([]byte(config), &cf)
@@ -213,13 +213,13 @@ func (bc *MemoryCache) vaccuum() {
 			return
 		}
 		for name := range bc.items {
-			bc.item_expired(name)
+			bc.itemExpired(name)
 		}
 	}
 }
 
-// item_expired returns true if an item is expired.
-func (bc *MemoryCache) item_expired(name string) bool {
+// itemExpired returns true if an item is expired.
+func (bc *MemoryCache) itemExpired(name string) bool {
 	bc.lock.Lock()
 	defer bc.lock.Unlock()
 	itm, ok := bc.items[name]
diff --git a/cache/redis/redis.go b/cache/redis/redis.go
index d14b1ada..ed12cf26 100644
--- a/cache/redis/redis.go
+++ b/cache/redis/redis.go
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// package redis for cache provider
+// Package redis for cache provider
 //
 // depend on github.com/garyburd/redigo/redis
 //
@@ -41,12 +41,12 @@ import (
 )
 
 var (
-	// the collection name of redis for cache adapter.
-	DefaultKey string = "beecacheRedis"
+	// DefaultKey the collection name of redis for cache adapter.
+	DefaultKey = "beecacheRedis"
 )
 
-// Redis cache adapter.
-type RedisCache struct {
+// Cache is Redis cache adapter.
+type Cache struct {
 	p        *redis.Pool // redis connection pool
 	conninfo string
 	dbNum    int
@@ -54,13 +54,13 @@ type RedisCache struct {
 	password string
 }
 
-// create new redis cache with default collection name.
-func NewRedisCache() *RedisCache {
-	return &RedisCache{key: DefaultKey}
+// NewRedisCache create new redis cache with default collection name.
+func NewRedisCache() *Cache {
+	return &Cache{key: DefaultKey}
 }
 
 // actually do the redis cmds
-func (rc *RedisCache) do(commandName string, args ...interface{}) (reply interface{}, err error) {
+func (rc *Cache) do(commandName string, args ...interface{}) (reply interface{}, err error) {
 	c := rc.p.Get()
 	defer c.Close()
 
@@ -68,7 +68,7 @@ func (rc *RedisCache) do(commandName string, args ...interface{}) (reply interfa
 }
 
 // Get cache from redis.
-func (rc *RedisCache) Get(key string) interface{} {
+func (rc *Cache) Get(key string) interface{} {
 	if v, err := rc.do("GET", key); err == nil {
 		return v
 	}
@@ -76,7 +76,7 @@ func (rc *RedisCache) Get(key string) interface{} {
 }
 
 // GetMulti get cache from redis.
-func (rc *RedisCache) GetMulti(keys []string) []interface{} {
+func (rc *Cache) GetMulti(keys []string) []interface{} {
 	size := len(keys)
 	var rv []interface{}
 	c := rc.p.Get()
@@ -108,8 +108,8 @@ ERROR:
 	return rv
 }
 
-// put cache to redis.
-func (rc *RedisCache) Put(key string, val interface{}, timeout int64) error {
+// Put put cache to redis.
+func (rc *Cache) Put(key string, val interface{}, timeout int64) error {
 	var err error
 	if _, err = rc.do("SETEX", key, timeout, val); err != nil {
 		return err
@@ -121,8 +121,8 @@ func (rc *RedisCache) Put(key string, val interface{}, timeout int64) error {
 	return err
 }
 
-// delete cache in redis.
-func (rc *RedisCache) Delete(key string) error {
+// Delete delete cache in redis.
+func (rc *Cache) Delete(key string) error {
 	var err error
 	if _, err = rc.do("DEL", key); err != nil {
 		return err
@@ -131,8 +131,8 @@ func (rc *RedisCache) Delete(key string) error {
 	return err
 }
 
-// check cache's existence in redis.
-func (rc *RedisCache) IsExist(key string) bool {
+// IsExist check cache's existence in redis.
+func (rc *Cache) IsExist(key string) bool {
 	v, err := redis.Bool(rc.do("EXISTS", key))
 	if err != nil {
 		return false
@@ -145,20 +145,20 @@ func (rc *RedisCache) IsExist(key string) bool {
 	return v
 }
 
-// increase counter in redis.
-func (rc *RedisCache) Incr(key string) error {
+// Incr increase counter in redis.
+func (rc *Cache) Incr(key string) error {
 	_, err := redis.Bool(rc.do("INCRBY", key, 1))
 	return err
 }
 
-// decrease counter in redis.
-func (rc *RedisCache) Decr(key string) error {
+// Decr decrease counter in redis.
+func (rc *Cache) Decr(key string) error {
 	_, err := redis.Bool(rc.do("INCRBY", key, -1))
 	return err
 }
 
-// clean all cache in redis. delete this redis collection.
-func (rc *RedisCache) ClearAll() error {
+// ClearAll clean all cache in redis. delete this redis collection.
+func (rc *Cache) ClearAll() error {
 	cachedKeys, err := redis.Strings(rc.do("HKEYS", rc.key))
 	if err != nil {
 		return err
@@ -172,11 +172,11 @@ func (rc *RedisCache) ClearAll() error {
 	return err
 }
 
-// start redis cache adapter.
+// StartAndGC start redis cache adapter.
 // config is like {"key":"collection key","conn":"connection info","dbNum":"0"}
 // the cache item in redis are stored forever,
 // so no gc operation.
-func (rc *RedisCache) StartAndGC(config string) error {
+func (rc *Cache) StartAndGC(config string) error {
 	var cf map[string]string
 	json.Unmarshal([]byte(config), &cf)
 
@@ -206,7 +206,7 @@ func (rc *RedisCache) StartAndGC(config string) error {
 }
 
 // connect to redis.
-func (rc *RedisCache) connectInit() {
+func (rc *Cache) connectInit() {
 	dialFunc := func() (c redis.Conn, err error) {
 		c, err = redis.Dial("tcp", rc.conninfo)
 		if err != nil {