1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
// Copyright 2013 Beego Authors
// Copyright 2014 The Macaron Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"): you may
// not use this file except in compliance with the License. You may obtain
// a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations
// under the License.
package cache
import (
"fmt"
"strings"
"time"
"github.com/Unknwon/com"
"gopkg.in/ini.v1"
"gopkg.in/redis.v2"
"github.com/go-macaron/cache"
)
// RedisCacher represents a redis cache adapter implementation.
type RedisCacher struct {
c *redis.Client
prefix string
hsetName string
occupyMode bool
}
// Put puts value into cache with key and expire time.
// If expired is 0, it lives forever.
func (c *RedisCacher) Put(key string, val interface{}, expire int64) error {
key = c.prefix + key
if expire == 0 {
if err := c.c.Set(key, com.ToStr(val)).Err(); err != nil {
return err
}
} else {
dur, err := time.ParseDuration(com.ToStr(expire) + "s")
if err != nil {
return err
}
if err = c.c.SetEx(key, dur, com.ToStr(val)).Err(); err != nil {
return err
}
}
if c.occupyMode {
return nil
}
return c.c.HSet(c.hsetName, key, "0").Err()
}
// Get gets cached value by given key.
func (c *RedisCacher) Get(key string) interface{} {
val, err := c.c.Get(c.prefix + key).Result()
if err != nil {
return nil
}
return val
}
// Delete deletes cached value by given key.
func (c *RedisCacher) Delete(key string) error {
key = c.prefix + key
if err := c.c.Del(key).Err(); err != nil {
return err
}
if c.occupyMode {
return nil
}
return c.c.HDel(c.hsetName, key).Err()
}
// Incr increases cached int-type value by given key as a counter.
func (c *RedisCacher) Incr(key string) error {
if !c.IsExist(key) {
return fmt.Errorf("key '%s' not exist", key)
}
return c.c.Incr(c.prefix + key).Err()
}
// Decr decreases cached int-type value by given key as a counter.
func (c *RedisCacher) Decr(key string) error {
if !c.IsExist(key) {
return fmt.Errorf("key '%s' not exist", key)
}
return c.c.Decr(c.prefix + key).Err()
}
// IsExist returns true if cached value exists.
func (c *RedisCacher) IsExist(key string) bool {
if c.c.Exists(c.prefix + key).Val() {
return true
}
if !c.occupyMode {
c.c.HDel(c.hsetName, c.prefix+key)
}
return false
}
// Flush deletes all cached data.
func (c *RedisCacher) Flush() error {
if c.occupyMode {
return c.c.FlushDb().Err()
}
keys, err := c.c.HKeys(c.hsetName).Result()
if err != nil {
return err
}
if err = c.c.Del(keys...).Err(); err != nil {
return err
}
return c.c.Del(c.hsetName).Err()
}
// StartAndGC starts GC routine based on config string settings.
// AdapterConfig: network=tcp,addr=:6379,password=macaron,db=0,pool_size=100,idle_timeout=180,hset_name=MacaronCache,prefix=cache:
func (c *RedisCacher) StartAndGC(opts cache.Options) error {
c.hsetName = "MacaronCache"
c.occupyMode = opts.OccupyMode
cfg, err := ini.Load([]byte(strings.Replace(opts.AdapterConfig, ",", "\n", -1)))
if err != nil {
return err
}
opt := &redis.Options{
Network: "tcp",
}
for k, v := range cfg.Section("").KeysHash() {
switch k {
case "network":
opt.Network = v
case "addr":
opt.Addr = v
case "password":
opt.Password = v
case "db":
opt.DB = com.StrTo(v).MustInt64()
case "pool_size":
opt.PoolSize = com.StrTo(v).MustInt()
case "idle_timeout":
opt.IdleTimeout, err = time.ParseDuration(v + "s")
if err != nil {
return fmt.Errorf("error parsing idle timeout: %v", err)
}
case "hset_name":
c.hsetName = v
case "prefix":
c.prefix = v
default:
return fmt.Errorf("session/redis: unsupported option '%s'", k)
}
}
c.c = redis.NewClient(opt)
if err = c.c.Ping().Err(); err != nil {
return err
}
return nil
}
func init() {
cache.Register("redis", &RedisCacher{})
}
|
