forked from jaegertracing/jaeger
-
Notifications
You must be signed in to change notification settings - Fork 0
/
worker.go
99 lines (88 loc) · 2.8 KB
/
worker.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
// Copyright (c) 2018 The Jaeger Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package tracegen
import (
"fmt"
"sync"
"sync/atomic"
"time"
"github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/ext"
"go.uber.org/zap"
)
type worker struct {
running *uint32 // pointer to shared flag that indicates it's time to stop the test
id int // worker id
traces int // how many traces the worker has to generate (only when duration==0)
marshal bool // whether the worker needs to marshal trace context via HTTP headers
debug bool // whether to set DEBUG flag on the spans
duration time.Duration // how long to run the test for (overrides `traces`)
pause time.Duration // how long to pause before finishing the trace
wg *sync.WaitGroup // notify when done
logger *zap.Logger
}
const (
fakeIP uint32 = 1<<24 | 2<<16 | 3<<8 | 4
fakeSpanDuration = 123 * time.Microsecond
)
func (w worker) simulateTraces() {
tracer := opentracing.GlobalTracer()
var i int
for atomic.LoadUint32(w.running) == 1 {
sp := tracer.StartSpan("lets-go")
ext.SpanKindRPCClient.Set(sp)
ext.PeerHostIPv4.Set(sp, fakeIP)
ext.PeerService.Set(sp, "tracegen-server")
if w.debug {
ext.SamplingPriority.Set(sp, 100)
}
childCtx := sp.Context()
if w.marshal {
m := make(map[string]string)
c := opentracing.TextMapCarrier(m)
if err := tracer.Inject(sp.Context(), opentracing.TextMap, c); err == nil {
c := opentracing.TextMapCarrier(m)
childCtx, err = tracer.Extract(opentracing.TextMap, c)
if err != nil {
w.logger.Error("cannot extract from TextMap", zap.Error(err))
}
} else {
w.logger.Error("cannot inject span", zap.Error(err))
}
}
child := opentracing.StartSpan(
"okey-dokey",
ext.RPCServerOption(childCtx),
)
ext.PeerHostIPv4.Set(child, fakeIP)
ext.PeerService.Set(child, "tracegen-client")
time.Sleep(w.pause)
if w.pause == 0 {
child.Finish()
sp.Finish()
} else {
opt := opentracing.FinishOptions{FinishTime: time.Now().Add(fakeSpanDuration)}
child.FinishWithOptions(opt)
sp.FinishWithOptions(opt)
}
i++
if w.traces != 0 {
if i >= w.traces {
break
}
}
}
w.logger.Info(fmt.Sprintf("Worker %d generated %d traces", w.id, i))
w.wg.Done()
}