-
Notifications
You must be signed in to change notification settings - Fork 0
/
main.go
225 lines (191 loc) · 5.1 KB
/
main.go
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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
package main
import (
"encoding/json"
"flag"
"fmt"
"io"
"io/ioutil"
"log"
"os"
"time"
"github.com/tidwall/redcon"
"github.com/tikibu/rostore/handler"
"github.com/tikibu/rostore/store"
)
/*func mockStore() (*store.Store, error) {
records := store.MockRecords()
// let's build a mock data jsonl file
recordsBytes := store.MockJsonlBytes(records)
//ioutil.WriteFile("test_data/records.jsonl", recordsBytes, 0644)
index, err := store.BuildIndex(bytes.NewReader(recordsBytes))
if err != nil {
return nil, err
}
indexBuf := bytes.Buffer{}
err = index.WriteJsonl(&indexBuf)
if err != nil {
return nil, err
}
//ioutil.WriteFile("test_data/mock_index.jsonl", indexBuf.Bytes(), 0644)
//let's build a store
store, err := store.NewStoreFromRecordsWithIndex(func() (io.ReadSeekCloser, error) {
return store.NewReadSeekCloser(bytes.NewReader(recordsBytes)), nil
},
bytes.NewReader(indexBuf.Bytes()))
if err != nil {
return nil, err
}
return store, nil
}*/
type StoreConfig struct {
RecordsFileName string `json:"records_file_name"`
IndexFileName string `json:"index_file_name,omitempty"`
}
func loadStore(storeConfig StoreConfig) (*store.Store, error) {
if storeConfig.RecordsFileName == "" {
return nil, fmt.Errorf("records file name is empty")
}
buildIndex := true
if storeConfig.IndexFileName == "" {
buildIndex = false
}
recordsFileName := storeConfig.RecordsFileName
var store_ *store.Store
var indexFile io.ReadCloser
if !buildIndex {
var err error
indexFile, err = os.Open(storeConfig.IndexFileName)
if err != nil {
buildIndex = true
}
}
if buildIndex {
var err error
store_, err = store.NewStoreFromRecords(func() (io.ReadSeekCloser, error) {
return os.Open(recordsFileName)
})
if err != nil {
return nil, err
}
return store_, nil
} else {
//let's build a store
var err error
recordsFileName := storeConfig.RecordsFileName
store_, err = store.NewStoreFromRecordsWithIndex(func() (io.ReadSeekCloser, error) {
return os.Open(recordsFileName)
}, indexFile)
if err != nil {
return nil, err
}
}
return store_, nil
}
func readConfigFromFile(configFileName string) (storeConfig *StoreConfig, lastModifed *time.Time, err error) {
stats, err := os.Stat(configFileName)
if err != nil {
return nil, nil, err
}
modTime := stats.ModTime()
lastModifed = &modTime
b, err := ioutil.ReadFile(configFileName)
if err != nil {
return nil, nil, err
}
storeConfig = &StoreConfig{}
err = json.Unmarshal(b, &storeConfig)
if err != nil {
return nil, nil, err
}
return storeConfig, lastModifed, nil
}
func generateIndex(recordsFileName string, indexFileName string) error {
recordsFile, err := os.Open(recordsFileName)
if err != nil {
return err
}
index, err := store.BuildIndex(recordsFile)
if err != nil {
return err
}
// open file for writing
indexFile, err := os.OpenFile(indexFileName, os.O_WRONLY|os.O_CREATE, 0644)
if err != nil {
return err
}
defer indexFile.Close()
err = index.WriteJsonl(indexFile)
if err != nil {
return err
}
return nil
}
func main() {
onlyGenerateIndex := flag.Bool("only_generate_index", false, "only generate index")
recordsFileName := flag.String("records_file_name", "", "records file name for index generation")
indexFileName := flag.String("index_file_name", "", "records file name for index generation")
addr := flag.String("addr", "localhost:6380", "addr to listen on")
configFileName := flag.String("config_file_name", "config.json", "config file name, with records file name and index file name")
checkConfigInterval := flag.Duration("check-config-interval", 5*time.Second, "check config file interval")
flag.Parse()
//generate index and exit
if *onlyGenerateIndex {
err := generateIndex(*recordsFileName, *indexFileName)
if err != nil {
log.Fatal(err)
}
return
}
//lets read config from file
storeConfig, lastModifed, err := readConfigFromFile(*configFileName)
if err != nil {
log.Fatal(err)
}
//let's load store
store_, err := loadStore(*storeConfig)
if err != nil {
log.Fatal(err)
}
/*log.Printf("started server at %s", addr)
store, err := mockStore()
if err != nil {
log.Fatal(err)
}*/
handler := handler.NewHandler(store_)
//config reload loop
go func() {
for {
time.Sleep(*checkConfigInterval)
storeConfig, modified, err := readConfigFromFile(*configFileName)
if err != nil {
log.Println(fmt.Errorf("Failed to load a config %w", err))
continue
}
if modified != nil && !modified.Equal(*lastModifed) {
store_, err := loadStore(*storeConfig)
if err != nil {
log.Println(fmt.Errorf("Failed to load a store %w", err))
} else {
handler.Store = store_
}
}
}
}()
mux := redcon.NewServeMux()
handler.SetUpMux(mux)
err = redcon.ListenAndServe(*addr,
mux.ServeRESP,
func(conn redcon.Conn) bool {
// use this function to accept or deny the connection.
// log.Printf("accept: %s", conn.RemoteAddr())
return true
},
func(conn redcon.Conn, err error) {
// this is called when the connection has been closed
// log.Printf("closed: %s, err: %v", conn.RemoteAddr(), err)
},
)
if err != nil {
log.Fatal(err)
}
}