-
Notifications
You must be signed in to change notification settings - Fork 0
/
mongodb.go
400 lines (343 loc) · 9.06 KB
/
mongodb.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
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
package tomox
import (
"bytes"
"encoding/hex"
"fmt"
"github.com/globalsign/mgo"
"github.com/globalsign/mgo/bson"
lru "github.com/hashicorp/golang-lru"
"github.com/tomochain/tomochain/common"
"github.com/tomochain/tomochain/ethdb"
"github.com/tomochain/tomochain/log"
"github.com/tomochain/tomochain/tomox/tomox_state"
"strings"
"time"
)
const (
ordersCollection = "orders"
tradesCollection = "trades"
)
type MongoItem struct {
Value interface{}
}
type MongoItemRecord struct {
Key string
Value string
}
type MongoDatabase struct {
Session *mgo.Session
dbName string
emptyKey []byte
cacheItems *lru.Cache // Cache for reading
orderBulk *mgo.Bulk
tradeBulk *mgo.Bulk
}
// InitSession initializes a new session with mongodb
func NewMongoDatabase(session *mgo.Session, dbName string, mongoURL string, replicaSetName string, cacheLimit int) (*MongoDatabase, error) {
if session == nil {
// in case of multiple database instances
hosts := strings.Split(mongoURL, ",")
dbInfo := &mgo.DialInfo{
Addrs: hosts,
Database: dbName,
ReplicaSetName: replicaSetName,
Timeout: 30 * time.Second,
}
ns, err := mgo.DialWithInfo(dbInfo)
if err != nil {
return nil, err
}
session = ns
}
itemCacheLimit := defaultCacheLimit
if cacheLimit > 0 {
itemCacheLimit = cacheLimit
}
cacheItems, _ := lru.New(itemCacheLimit)
db := &MongoDatabase{
Session: session,
dbName: dbName,
cacheItems: cacheItems,
}
if err := db.EnsureIndexes(); err != nil {
return nil, err
}
return db, nil
}
func (db *MongoDatabase) IsEmptyKey(key []byte) bool {
return key == nil || len(key) == 0 || bytes.Equal(key, db.emptyKey)
}
func (db *MongoDatabase) getCacheKey(key []byte) string {
return hex.EncodeToString(key)
}
func (db *MongoDatabase) HasObject(hash common.Hash) (bool, error) {
if db.IsEmptyKey(hash.Bytes()) {
return false, nil
}
cacheKey := db.getCacheKey(hash.Bytes())
if db.cacheItems.Contains(cacheKey) {
return true, nil
}
sc := db.Session.Copy()
defer sc.Close()
var (
count int
err error
)
query := bson.M{"hash": hash.Hex()}
// Find key in ordersCollection collection
count, err = sc.DB(db.dbName).C(ordersCollection).Find(query).Limit(1).Count()
if err != nil {
return false, err
}
if count == 1 {
return true, nil
}
// Find key in tradesCollection collection
count, err = sc.DB(db.dbName).C(tradesCollection).Find(query).Limit(1).Count()
if err != nil {
return false, err
}
if count == 1 {
return true, nil
}
return false, nil
}
func (db *MongoDatabase) GetObject(hash common.Hash, val interface{}) (interface{}, error) {
if db.IsEmptyKey(hash.Bytes()) {
return nil, nil
}
cacheKey := db.getCacheKey(hash.Bytes())
if cached, ok := db.cacheItems.Get(cacheKey); ok {
return cached, nil
} else {
sc := db.Session.Copy()
defer sc.Close()
query := bson.M{"hash": hash.Hex()}
switch val.(type) {
case *tomox_state.OrderItem:
var oi *tomox_state.OrderItem
err := sc.DB(db.dbName).C(ordersCollection).Find(query).One(&oi)
if err != nil {
return nil, err
}
db.cacheItems.Add(cacheKey, oi)
return oi, nil
case *Trade:
var t *Trade
err := sc.DB(db.dbName).C(tradesCollection).Find(query).One(&t)
if err != nil {
return nil, err
}
db.cacheItems.Add(cacheKey, t)
return t, nil
default:
return nil, nil
}
}
}
func (db *MongoDatabase) PutObject(hash common.Hash, val interface{}) error {
cacheKey := db.getCacheKey(hash.Bytes())
db.cacheItems.Add(cacheKey, val)
switch val.(type) {
case *Trade:
// PutObject trade into tradesCollection collection
if err := db.CommitTrade(val.(*Trade)); err != nil {
log.Error(err.Error())
return err
}
case *tomox_state.OrderItem:
// PutObject order into ordersCollection collection
// Store the key
o := val.(*tomox_state.OrderItem)
if err := db.CommitOrder(o); err != nil {
log.Error(err.Error())
return err
}
default:
log.Error("PutObject: object is neither order nor trade", "val", val)
}
return nil
}
func (db *MongoDatabase) DeleteObject(hash common.Hash) error {
cacheKey := db.getCacheKey(hash.Bytes())
db.cacheItems.Remove(cacheKey)
sc := db.Session.Copy()
defer sc.Close()
query := bson.M{"hash": hash.Hex()}
found, err := db.HasObject(hash)
if err != nil {
return err
}
if found {
err := sc.DB(db.dbName).C(tradesCollection).Remove(query)
if err != nil && err != mgo.ErrNotFound {
log.Error("Error when deleting trades", "error", err)
return err
}
err = sc.DB(db.dbName).C(ordersCollection).Remove(query)
if err != nil && err != mgo.ErrNotFound {
log.Error("Error when deleting order", "error", err)
return err
}
}
return nil
}
func (db *MongoDatabase) CommitOrder(o *tomox_state.OrderItem) error {
if o.Status == OrderStatusOpen {
db.orderBulk.Insert(o)
} else {
query := bson.M{"hash": o.Hash.Hex()}
db.orderBulk.Upsert(query, o)
}
return nil
}
func (db *MongoDatabase) CommitTrade(t *Trade) error {
// for trades: insert only, no update
// Hence, insert is better than upsert
db.tradeBulk.Insert(t)
return nil
}
func (db *MongoDatabase) InitBulk() *mgo.Session {
sc := db.Session.Copy()
db.orderBulk = sc.DB(db.dbName).C(ordersCollection).Bulk()
db.tradeBulk = sc.DB(db.dbName).C(tradesCollection).Bulk()
return sc
}
func (db *MongoDatabase) CommitBulk() error {
if _, err := db.orderBulk.Run(); err != nil && !mgo.IsDup(err) {
return err
}
if _, err := db.tradeBulk.Run(); err != nil && !mgo.IsDup(err) {
return err
}
return nil
}
func (db *MongoDatabase) Put(key []byte, val []byte) error {
// for levelDB only
return nil
}
func (db *MongoDatabase) Delete(key []byte) error {
// for levelDB only
return nil
}
func (db *MongoDatabase) Has(key []byte) (bool, error) {
// for levelDB only
return false, nil
}
func (db *MongoDatabase) Get(key []byte) ([]byte, error) {
// for levelDB only
return nil, nil
}
func (db *MongoDatabase) DeleteTradeByTxHash(txhash common.Hash) {
sc := db.Session.Copy()
defer sc.Close()
query := bson.M{"txHash": txhash.Hex()}
err := sc.DB(db.dbName).C(tradesCollection).Remove(query)
if err != nil && err != mgo.ErrNotFound {
log.Error("Error when deleting order", "error", err)
}
}
func (db *MongoDatabase) GetOrderByTxHash(txhash common.Hash) []*tomox_state.OrderItem {
var result []*tomox_state.OrderItem
sc := db.Session.Copy()
defer sc.Close()
query := bson.M{"txHash": txhash.Hex()}
if err := sc.DB(db.dbName).C(ordersCollection).Find(query).All(&result); err != nil && err != mgo.ErrNotFound {
log.Error("failed to GetOrderByTxHash", "err", err, "Txhash", txhash)
}
return result
}
func (db *MongoDatabase) GetListOrderByHashes(hashes []string) []*tomox_state.OrderItem {
var result []*tomox_state.OrderItem
sc := db.Session.Copy()
defer sc.Close()
query := bson.M{"hash": bson.M{"$in": hashes}}
if err := sc.DB(db.dbName).C(ordersCollection).Find(query).All(&result); err != nil && err != mgo.ErrNotFound {
log.Error("failed to GetListOrderByHashes", "err", err, "hashes", hashes)
return []*tomox_state.OrderItem{}
}
return result
}
func (db *MongoDatabase) EnsureIndexes() error {
orderHashIndex := mgo.Index{
Key: []string{"hash"},
Unique: true,
DropDups: true,
Background: true,
Sparse: true,
Name: "index_order_hash",
}
orderTxHashIndex := mgo.Index{
Key: []string{"txHash"},
DropDups: true,
Background: true,
Sparse: true,
Name: "index_order_tx_hash",
}
tradeHashIndex := mgo.Index{
Key: []string{"hash"},
Unique: true,
DropDups: true,
Background: true,
Sparse: true,
Name: "index_trade_hash",
}
tradeTxHashIndex := mgo.Index{
Key: []string{"txHash"},
DropDups: true,
Background: true,
Sparse: true,
Name: "index_trade_tx_hash",
}
sc := db.Session.Copy()
defer sc.Close()
if err := sc.DB(db.dbName).C(ordersCollection).EnsureIndex(orderHashIndex); err != nil {
return fmt.Errorf("failed to index orders.hash . Err: %v", err)
}
if err := sc.DB(db.dbName).C(ordersCollection).EnsureIndex(orderTxHashIndex); err != nil {
return fmt.Errorf("failed to index orders.txHash . Err: %v", err)
}
if err := sc.DB(db.dbName).C(tradesCollection).EnsureIndex(tradeHashIndex); err != nil {
return fmt.Errorf("failed to index trades.hash . Err: %v", err)
}
if err := sc.DB(db.dbName).C(tradesCollection).EnsureIndex(tradeTxHashIndex); err != nil {
return fmt.Errorf("failed to index trades.txHash . Err: %v", err)
}
return nil
}
func (db *MongoDatabase) Close() {
db.Close()
}
func (db *MongoDatabase) NewBatch() ethdb.Batch {
// for levelDB only
return nil
}
type keyvalue struct {
key []byte
value []byte
}
type Batch struct {
db *MongoDatabase
collection string
b []keyvalue
size int
}
func (b *Batch) SetCollection(collection string) {
// for levelDB only
}
func (b *Batch) Put(key, value []byte) error {
// for levelDB only
return nil
}
func (b *Batch) Write() error {
// for levelDB only
return nil
}
func (b *Batch) ValueSize() int {
// for levelDB only
return int(0)
}
func (b *Batch) Reset() {
// for levelDB only
}