-
Notifications
You must be signed in to change notification settings - Fork 9
/
receiver.go
387 lines (337 loc) · 9.82 KB
/
receiver.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
package main
import (
"context"
"encoding/binary"
"fmt"
"log"
"math"
"net"
"os"
"runtime"
"strconv"
"sync"
"sync/atomic"
"time"
btrdb "gopkg.in/BTrDB/btrdb.v4"
etcd "github.com/coreos/etcd/clientv3"
"github.com/BTrDB/smartgridstore/tools"
)
const VersionMajor = tools.VersionMajor
const VersionMinor = tools.VersionMinor
const VersionPatch = tools.VersionPatch
var FAILUREMSG = make([]byte, 4, 4)
var Port = 1884
const (
CONNBUFLEN = 1024 // number of bytes we read from the connection at a time
MAXFILEPATHLEN = 512
MAXSERNUMLEN = 32
EXPDATALEN = 757440
MAXDATALEN = 75744000
MAXCONCURRENTSESSIONS = 16
TIMEOUTSECS = 30
)
var MaxConcurrentInserts int64 = 1024
var insertionSemaphore chan struct{}
func roundUp4(x uint32) uint32 {
return (x + 3) & 0xFFFFFFFC
}
type insertstats struct {
minlatency uint64
maxlatency uint64
totallatency uint64
insertcount uint64
}
var processing insertstats
var queueing insertstats
var response insertstats
var verbose bool
func resetStats(stats *insertstats) {
atomic.StoreUint64(&stats.minlatency, math.MaxUint64)
atomic.StoreUint64(&stats.maxlatency, 0)
atomic.StoreUint64(&stats.totallatency, 0)
atomic.StoreUint64(&stats.insertcount, 0)
}
func printStatsAndReset(stats *insertstats, prefix string) {
cnt := atomic.LoadUint64(&stats.insertcount)
if cnt == 0 {
resetStats(stats)
log.Printf("%s: No records processed", prefix)
return
}
avg := atomic.LoadUint64(&stats.totallatency) / cnt
min := atomic.LoadUint64(&stats.minlatency)
max := atomic.LoadUint64(&stats.maxlatency)
resetStats(stats)
log.Printf("%s: Min = %v, Mean = %v, Max = %v, Count = %v", prefix, time.Duration(min), time.Duration(avg), time.Duration(max), cnt)
}
func updateStats(stats *insertstats, latency uint64) {
var success bool
success = false
for !success {
var newmin uint64
oldmin := atomic.LoadUint64(&stats.minlatency)
if latency < oldmin {
newmin = latency
} else {
newmin = oldmin
}
success = atomic.CompareAndSwapUint64(&stats.minlatency, oldmin, newmin)
}
success = false
for !success {
var newmax uint64
oldmax := atomic.LoadUint64(&stats.maxlatency)
if oldmax < latency {
newmax = latency
} else {
newmax = oldmax
}
success = atomic.CompareAndSwapUint64(&stats.maxlatency, oldmax, newmax)
}
atomic.AddUint64(&stats.totallatency, latency)
atomic.AddUint64(&stats.insertcount, 1)
}
func handlePMUConn(conn *net.TCPConn) {
fmt.Printf("Connected: %s\n", conn.RemoteAddr().String())
defer conn.Close()
/* Stores error on failed read from TCP connection. */
var err error
/* Stores error on failed write to TCP connection. */
var erw error
/* The id of a message is 4 bytes long. */
var sendid []byte
/* The length of the filepath. */
var lenfp uint32
/* The length of the filepath, including the padding added so it ends on a word boundary. */
var lenpfp uint32
/* The length of the serial number. */
var lensn uint32
/* The length of the serial number, including the padding added so it ends on a word boundary. */
var lenpsn uint32
/* The length of the data. */
var lendt uint32
/* Read from the Connection 1 KiB at a time. */
var buf = make([]byte, CONNBUFLEN)
var bpos int
/* INFOBUFFER stores length data from the beginning of the message to get the length of the rest. */
var infobuffer [16]byte
var ibindex uint32
/* FPBUFFER stores the filepath data received so far. */
var fpbuffer = make([]byte, MAXFILEPATHLEN, MAXFILEPATHLEN)
var fpindex uint32
var filepath string
/* SNBUFFER stores the part of the serial number received so far. */
var snbuffer = make([]byte, MAXSERNUMLEN, MAXSERNUMLEN)
var snindex uint32
var sernum string
var newsernum string
/* DTBUFFER stores the part of the uPMU data received so far.
If a file is bigger than expected, we allocate a bigger buffer, specially for that file. */
var dtbufferexp = make([]byte, EXPDATALEN, EXPDATALEN)
var dtbuffer []byte = nil
var dtindex uint32
/* N stores the number of bytes read in the current read from the TCP connection. */
var n int
/* TOTRECV stores the total number of bytes read from the TCP connection for this message. */
var totrecv uint32
/* The response to send to the uPMU. */
var recvdfull bool
/* To protect writing responses back to the client uPMUs. */
outlock := &sync.Mutex{}
// Infinite loop to keep reading messages until connection is closed
for {
ibindex = 0
fpindex = 0
snindex = 0
dtindex = 0
totrecv = 0
recvdfull = false
// Read and process the message
for !recvdfull {
n, err = conn.Read(buf)
bpos = 0
if bpos < n && totrecv < 16 {
for ibindex < 16 && bpos < n {
infobuffer[ibindex] = buf[bpos]
ibindex++
bpos++
totrecv++
}
if ibindex == 16 {
sendid = infobuffer[:4]
lenfp = binary.LittleEndian.Uint32(infobuffer[4:8])
lensn = binary.LittleEndian.Uint32(infobuffer[8:12])
lendt = binary.LittleEndian.Uint32(infobuffer[12:16])
lenpfp = roundUp4(lenfp)
lenpsn = roundUp4(lensn)
if lenfp != 0 && lenfp > MAXFILEPATHLEN {
fmt.Printf("Filepath length fails sanity check: %v\n", lenfp)
return
}
if lensn != 0 && lensn > MAXSERNUMLEN {
fmt.Printf("Serial number length fails sanity check: %v\n", lensn)
return
}
if lendt != 0 && lendt > MAXDATALEN {
fmt.Printf("Data length fails sanity check: %v\n", lendt)
return
}
if lendt <= EXPDATALEN {
dtbuffer = dtbufferexp
} else {
dtbuffer = make([]byte, lendt, lendt)
}
}
}
if bpos < n && totrecv < 16+lenpfp {
for fpindex < lenpfp && bpos < n {
fpbuffer[fpindex] = buf[bpos]
fpindex++
bpos++
totrecv++
}
if fpindex == lenpfp {
filepath = string(fpbuffer[:lenfp])
}
}
if bpos < n && totrecv < 16+lenpfp+lenpsn {
for snindex < lenpsn && bpos < n {
snbuffer[snindex] = buf[bpos]
snindex++
bpos++
totrecv++
}
if snindex == lenpsn {
newsernum = string(snbuffer[:lensn])
// we used to warn if the serial number changed from previous received frame
sernum = newsernum
}
}
if bpos < n && totrecv < 16+lenpfp+lenpsn+lendt {
for dtindex < lendt && bpos < n {
dtbuffer[dtindex] = buf[bpos]
dtindex++
bpos++
totrecv++
}
if dtindex == lendt {
if bpos < n {
fmt.Printf("WARNING: got %d extra bytes\n", n-bpos)
}
// if we've reached this point, we have all the data
recvdfull = true
if verbose {
fmt.Printf("Received %s: serial number is %s, length is %v\n", filepath, sernum, lendt)
}
go func() {
queuestart := time.Now()
insertionSemaphore <- struct{}{}
defer func() {
<-insertionSemaphore
}()
updateStats(&queueing, uint64(time.Since(queuestart)))
processstart := time.Now()
success := processMessage(context.TODO(), sernum, dtbuffer[:lendt])
resp := sendid
if !success {
resp = FAILUREMSG
}
updateStats(&processing, uint64(time.Since(processstart)))
respstart := time.Now()
outlock.Lock()
_, erw = conn.Write(resp)
outlock.Unlock()
if erw != nil {
fmt.Printf("Connection lost: %v (write failed: %v)\n", conn.RemoteAddr().String(), erw)
}
updateStats(&response, uint64(time.Since(respstart)))
}()
}
}
if err != nil {
fmt.Printf("Connection lost: %v (reason: %v)\n", conn.RemoteAddr().String(), err)
return
}
}
}
}
func main() {
if len(os.Args) > 1 && os.Args[1] == "-version" {
fmt.Printf("%d.%d.%d\n", VersionMajor, VersionMinor, VersionPatch)
os.Exit(0)
}
fmt.Printf("Booting pmu2btrdb version %d.%d.%d\n", VersionMajor, VersionMinor, VersionPatch)
if len(os.Args) > 1 && os.Args[1] == "-verbose" {
verbose = true
fmt.Printf("Verbose mode is turned on")
}
runtime.GOMAXPROCS(runtime.NumCPU())
//Load variables
prt := os.Getenv("RECEIVER_PORT")
if prt == "" {
Port = 1884
} else {
p, err := strconv.ParseInt(prt, 10, 64)
if err != nil {
log.Fatalf("Could not parse port: %v", err)
}
Port = int(p)
}
var err error
mci := os.Getenv("PMU2BTRDB_MAX_OUTSTANDING")
if mci == "" {
log.Printf("PMU2BTRDB_MAX_OUTSTANDING is not set; using %d", MaxConcurrentInserts)
} else {
MaxConcurrentInserts, err = strconv.ParseInt(prt, 10, 64)
if err != nil {
log.Fatalf("Could not parse PMU2BTRDB_MAX_OUTSTANDING: %v", err)
}
}
insertionSemaphore = make(chan struct{}, MaxConcurrentInserts)
bc, err = btrdb.Connect(context.TODO(), btrdb.EndpointsFromEnv()...)
if err != nil {
log.Fatalf("Could not connect to BTrDB: %v", err)
}
etcdEndpoint := os.Getenv("ETCD_ENDPOINT")
if len(etcdEndpoint) == 0 {
etcdEndpoint = "localhost:2379"
log.Printf("ETCD_ENDPOINT is not set; using %s", etcdEndpoint)
}
ec, err = etcd.New(etcd.Config{
Endpoints: []string{etcdEndpoint},
DialTimeout: 10 * time.Second,
})
if err != nil {
log.Fatalf("Could not connect to etcd: %v\n", err)
}
bindaddr, err := net.ResolveTCPAddr("tcp", fmt.Sprintf("0.0.0.0:%v", Port))
if err != nil {
log.Fatalf("Could not resolve address to bind TCP server socket: %v\n", err)
}
listener, err := net.ListenTCP("tcp", bindaddr)
if err != nil {
log.Fatalf("Could not create bound TCP server socket: %v\n", err)
}
resetStats(&queueing)
resetStats(&processing)
resetStats(&response)
go func() {
for {
time.Sleep(5 * time.Second)
log.Printf("Num goroutines: %v", runtime.NumGoroutine())
printStatsAndReset(&queueing, "Queueing")
printStatsAndReset(&processing, "Processing")
printStatsAndReset(&response, "Response")
}
}()
log.Println("Waiting for incoming connections...")
var upmuconn *net.TCPConn
for {
upmuconn, err = listener.AcceptTCP()
if err == nil {
go handlePMUConn(upmuconn)
} else {
log.Printf("Could not accept incoming TCP connection: %v\n", err)
}
}
}