forked from jaegertracing/jaeger
-
Notifications
You must be signed in to change notification settings - Fork 0
/
span_processor.go
147 lines (127 loc) · 4.21 KB
/
span_processor.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
// Copyright (c) 2017 Uber Technologies, Inc.
//
// 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 app
import (
"time"
"github.com/uber/tchannel-go"
"go.uber.org/zap"
"github.com/uber/jaeger/model"
"github.com/uber/jaeger/storage/spanstore"
"github.com/uber/jaeger/cmd/collector/app/sanitizer"
"github.com/uber/jaeger/pkg/queue"
)
type spanProcessor struct {
queue *queue.BoundedQueue
metrics *SpanProcessorMetrics
preProcessSpans ProcessSpans
filterSpan FilterSpan // filter is called before the sanitizer but after preProcessSpans
sanitizer sanitizer.SanitizeSpan // sanitizer is called before processSpan
processSpan ProcessSpan
logger *zap.Logger
spanWriter spanstore.Writer
reportBusy bool
numWorkers int
}
type queueItem struct {
queuedTime time.Time
span *model.Span
}
// NewSpanProcessor returns a SpanProcessor that preProcesses, filters, queues, sanitizes, and processes spans
func NewSpanProcessor(
spanWriter spanstore.Writer,
opts ...Option,
) SpanProcessor {
sp := newSpanProcessor(spanWriter, opts...)
sp.queue.StartConsumers(sp.numWorkers, func(item interface{}) {
value := item.(*queueItem)
sp.processItemFromQueue(value)
})
sp.queue.StartLengthReporting(1*time.Second, sp.metrics.QueueLength)
return sp
}
func newSpanProcessor(spanWriter spanstore.Writer, opts ...Option) *spanProcessor {
options := Options.apply(opts...)
handlerMetrics := NewSpanProcessorMetrics(
options.serviceMetrics,
options.hostMetrics,
options.extraFormatTypes)
droppedItemHandler := func(item interface{}) {
handlerMetrics.SpansDropped.Inc(1)
}
boundedQueue := queue.NewBoundedQueue(options.queueSize, droppedItemHandler)
sp := spanProcessor{
queue: boundedQueue,
metrics: handlerMetrics,
logger: options.logger,
preProcessSpans: options.preProcessSpans,
filterSpan: options.spanFilter,
sanitizer: options.sanitizer,
reportBusy: options.reportBusy,
numWorkers: options.numWorkers,
spanWriter: spanWriter,
}
sp.processSpan = ChainedProcessSpan(
options.preSave,
sp.saveSpan,
)
return &sp
}
// Stop halts the span processor and all its go-routines.
func (sp *spanProcessor) Stop() {
sp.queue.Stop()
}
func (sp *spanProcessor) saveSpan(span *model.Span) {
startTime := time.Now()
if err := sp.spanWriter.WriteSpan(span); err != nil {
sp.logger.Error("Failed to save span", zap.Error(err))
} else {
sp.metrics.SavedBySvc.ReportServiceNameForSpan(span)
}
sp.metrics.SaveLatency.Record(time.Now().Sub(startTime))
}
func (sp *spanProcessor) ProcessSpans(mSpans []*model.Span, spanFormat string) ([]bool, error) {
sp.preProcessSpans(mSpans)
sp.metrics.GetCountsForFormat(spanFormat).Received.Inc(int64(len(mSpans)))
sp.metrics.BatchSize.Update(int64(len(mSpans)))
retMe := make([]bool, len(mSpans))
for i, mSpan := range mSpans {
ok := sp.enqueueSpan(mSpan, spanFormat)
if !ok && sp.reportBusy {
return nil, tchannel.ErrServerBusy
}
retMe[i] = ok
}
return retMe, nil
}
func (sp *spanProcessor) processItemFromQueue(item *queueItem) {
sp.processSpan(sp.sanitizer(item.span))
sp.metrics.InQueueLatency.Record(time.Now().Sub(item.queuedTime))
}
func (sp *spanProcessor) enqueueSpan(span *model.Span, originalFormat string) bool {
spanCounts := sp.metrics.GetCountsForFormat(originalFormat)
spanCounts.ReceivedBySvc.ReportServiceNameForSpan(span)
if !sp.filterSpan(span) {
spanCounts.Rejected.Inc(int64(1))
return true // as in "not dropped", because it's actively rejected
}
item := &queueItem{
queuedTime: time.Now(),
span: span,
}
addedToQueue := sp.queue.Produce(item)
if !addedToQueue {
sp.metrics.ErrorBusy.Inc(1)
}
return addedToQueue
}