-
Notifications
You must be signed in to change notification settings - Fork 830
/
output.go
136 lines (116 loc) · 3.59 KB
/
output.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
package nsq
import (
"context"
"crypto/tls"
"fmt"
"io"
llog "log"
"sync"
"time"
nsq "github.com/nsqio/go-nsq"
"github.com/benthosdev/benthos/v4/internal/bloblang/field"
"github.com/benthosdev/benthos/v4/internal/bundle"
"github.com/benthosdev/benthos/v4/internal/component"
"github.com/benthosdev/benthos/v4/internal/component/output"
"github.com/benthosdev/benthos/v4/internal/component/output/processors"
"github.com/benthosdev/benthos/v4/internal/docs"
"github.com/benthosdev/benthos/v4/internal/log"
"github.com/benthosdev/benthos/v4/internal/message"
btls "github.com/benthosdev/benthos/v4/internal/tls"
)
func init() {
err := bundle.AllOutputs.Add(processors.WrapConstructor(newNSQOutput), docs.ComponentSpec{
Name: "nsq",
Summary: `Publish to an NSQ topic.`,
Description: output.Description(true, false, `The `+"`topic`"+` field can be dynamically set using function interpolations described [here](/docs/configuration/interpolation#bloblang-queries). When sending batched messages these interpolations are performed per message part.`),
Config: docs.FieldComponent().WithChildren(
docs.FieldString("nsqd_tcp_address", "The address of the target NSQD server."),
docs.FieldString("topic", "The topic to publish to.").IsInterpolated(),
docs.FieldString("user_agent", "A user agent string to connect with."),
btls.FieldSpec(),
docs.FieldInt("max_in_flight", "The maximum number of messages to have in flight at a given time. Increase this to improve throughput."),
).ChildDefaultAndTypesFromStruct(output.NewNSQConfig()),
Categories: []string{
"Services",
},
})
if err != nil {
panic(err)
}
}
func newNSQOutput(conf output.Config, mgr bundle.NewManagement) (output.Streamed, error) {
w, err := newNSQWriter(conf.NSQ, mgr)
if err != nil {
return nil, err
}
return output.NewAsyncWriter("nsq", conf.NSQ.MaxInFlight, w, mgr)
}
type nsqWriter struct {
log log.Modular
topicStr *field.Expression
tlsConf *tls.Config
connMut sync.RWMutex
producer *nsq.Producer
conf output.NSQConfig
}
func newNSQWriter(conf output.NSQConfig, mgr bundle.NewManagement) (*nsqWriter, error) {
n := nsqWriter{
log: mgr.Logger(),
conf: conf,
}
var err error
if n.topicStr, err = mgr.BloblEnvironment().NewField(conf.Topic); err != nil {
return nil, fmt.Errorf("failed to parse topic expression: %v", err)
}
if conf.TLS.Enabled {
if n.tlsConf, err = conf.TLS.Get(); err != nil {
return nil, err
}
}
return &n, nil
}
func (n *nsqWriter) ConnectWithContext(ctx context.Context) error {
n.connMut.Lock()
defer n.connMut.Unlock()
cfg := nsq.NewConfig()
cfg.UserAgent = n.conf.UserAgent
if n.tlsConf != nil {
cfg.TlsV1 = true
cfg.TlsConfig = n.tlsConf
}
producer, err := nsq.NewProducer(n.conf.Address, cfg)
if err != nil {
return err
}
producer.SetLogger(llog.New(io.Discard, "", llog.Flags()), nsq.LogLevelError)
if err := producer.Ping(); err != nil {
return err
}
n.producer = producer
n.log.Infof("Sending NSQ messages to address: %s\n", n.conf.Address)
return nil
}
func (n *nsqWriter) WriteWithContext(ctx context.Context, msg message.Batch) error {
n.connMut.RLock()
prod := n.producer
n.connMut.RUnlock()
if prod == nil {
return component.ErrNotConnected
}
return output.IterateBatchedSend(msg, func(i int, p *message.Part) error {
return prod.Publish(n.topicStr.String(i, msg), p.AsBytes())
})
}
func (n *nsqWriter) CloseAsync() {
go func() {
n.connMut.Lock()
if n.producer != nil {
n.producer.Stop()
n.producer = nil
}
n.connMut.Unlock()
}()
}
func (n *nsqWriter) WaitForClose(timeout time.Duration) error {
return nil
}