/
bmo.go
203 lines (175 loc) · 4.6 KB
/
bmo.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
package main
import (
"encoding/json"
"flag"
"fmt"
r "github.com/dancannon/gorethink"
"github.com/jeffail/tunny"
"io"
"log"
"os"
"runtime"
"strings"
)
const BMO_ART = `
▄██████████████████████▄
█ █
█ ▄██████████████████▄ █
█ █ █ █
█ █ █ █
█ █ █ █ █ █
█ █ ▄▄▄▄▄▄▄▄ █ █
█ █ ▀▄ ▄▀ █ █
█ █ ▀▀▀▀ █ █
█ █ █ █
█▌ █ ▀██████████████████▀ █ ▐█
█ █ █ █
█ █ ████████████ ██ █ █
█ █ █ █
█ █ ▄ █ █
▀█▄█ ▐█▌ ▄███▄ ██ █▄█▀
▀█ █████ █▀
█ ▐█▌ ▄██▄ █
█ ▐████▌ █
█ ▄▄▄ ▄▄▄ ▀██▀ █
█ █
▀██████████████████████▀
██ ██
██ ██
██ ██
██ ██
▐██ ██▌`
const POOL_SIZE = 20
// http://www.rethinkdb.com/docs/troubleshooting/
// "RethinkDB operates at peak performance when the batch size is around two hundred documents."
const INSERT_BATCH_SIZE = 200
type BMO struct {
nodes NodeList
database string
table string
seq uint64
}
func NewBMO(nodes NodeList, database string, table string) *BMO {
bmo := &BMO{
nodes: nodes,
database: database,
table: table,
seq: 0,
}
return bmo
}
type Message interface{}
func (bmo *BMO) Compute(input *os.File) {
var err error
var cur *r.Cursor
var session *r.Session
// set up database connection pool
session, err = r.Connect(r.ConnectOpts{
Addresses: bmo.nodes,
Database: bmo.database,
DiscoverHosts: true,
})
session.SetMaxOpenConns(POOL_SIZE)
if err != nil {
log.Fatalln(err)
}
// ensure table is present
var tableNames []string
cur, err = r.DB(bmo.database).TableList().Run(session)
if err != nil {
log.Fatalln(err)
}
cur.All(&tableNames)
set := make(map[string]bool)
for _, v := range tableNames {
set[v] = true
}
if !set[bmo.table] {
log.Println("Creating table ", bmo.table)
_, err = r.DB(bmo.database).TableCreate(bmo.table).RunWrite(session)
if err != nil {
log.Fatalln("Error creating table: ", err)
os.Exit(1)
}
}
// deliver the messages
decoder := json.NewDecoder(input)
ms := make([]Message, INSERT_BATCH_SIZE)
var m *Message
var i uint64
var ignoreLast bool
pool, _ := tunny.CreatePoolGeneric(POOL_SIZE).Open()
defer pool.Close()
table := r.Table(bmo.table)
insertOptions := r.InsertOpts{Durability: "soft"}
insert := func() {
j := i
if !ignoreLast {
j += 1
}
_, err = table.Insert(ms[:j], insertOptions).RunWrite(session)
if err != nil {
log.Fatal(err)
os.Exit(1)
}
}
for {
i = bmo.seq % INSERT_BATCH_SIZE
m = &ms[i]
err = decoder.Decode(&m)
switch {
case err == io.EOF:
ignoreLast = true
pool.SendWork(insert)
return
case err != nil:
ignoreLast = true
pool.SendWork(insert)
log.Fatal("Can't parse json input, \"", err, "\". Object #", bmo.seq, ", after ", m)
os.Exit(1)
default:
if i+1 == INSERT_BATCH_SIZE {
ignoreLast = false
pool.SendWork(insert)
}
}
bmo.seq += 1
}
}
type NodeList []string
func (list *NodeList) String() string {
return strings.Join(*list, ", ")
}
func (list *NodeList) Set(node string) error {
*list = append(*list, node)
return nil
}
func main() {
runtime.GOMAXPROCS(runtime.NumCPU())
var nodes NodeList
flag.Var(&nodes, "node", "RethinkDB host[:port], can specify multiple times")
database := flag.String("database", "sophia", "Name of target database")
table := flag.String("table", "bmo_test", "Name of target table")
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "%s\n\nUsage of %s:\n", BMO_ART, os.Args[0])
flag.PrintDefaults()
}
flag.Parse()
if len(nodes) == 0 {
log.Fatalln("Specify at least one node address")
flag.Usage()
os.Exit(2)
}
if *database == "" {
log.Fatalln("Specify the database")
flag.Usage()
os.Exit(2)
}
if *table == "" {
log.Fatalln("Specify the target table")
flag.Usage()
os.Exit(2)
}
bmo := NewBMO(nodes, *database, *table)
bmo.Compute(os.Stdin)
}