forked from jaegertracing/jaeger
-
Notifications
You must be signed in to change notification settings - Fork 0
/
parallel_processor.go
80 lines (71 loc) · 2.02 KB
/
parallel_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
// 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 processor
import (
"sync"
"go.uber.org/zap"
)
// ParallelProcessor is a processor that processes in parallel using a pool of goroutines
type ParallelProcessor struct {
messages chan Message
processor SpanProcessor
numRoutines int
logger *zap.Logger
closed chan struct{}
wg sync.WaitGroup
}
// NewParallelProcessor creates a new parallel processor
func NewParallelProcessor(
processor SpanProcessor,
parallelism int,
logger *zap.Logger) *ParallelProcessor {
return &ParallelProcessor{
logger: logger,
messages: make(chan Message),
processor: processor,
numRoutines: parallelism,
closed: make(chan struct{}),
}
}
// Start begins processing queued messages
func (k *ParallelProcessor) Start() {
k.logger.Debug("Spawning goroutines to process messages", zap.Int("num_routines", k.numRoutines))
for i := 0; i < k.numRoutines; i++ {
k.wg.Add(1)
go func() {
for {
select {
case msg := <-k.messages:
k.processor.Process(msg)
case <-k.closed:
k.wg.Done()
return
}
}
}()
}
}
// Process queues a message for processing
func (k *ParallelProcessor) Process(message Message) error {
k.messages <- message
return nil
}
// Close terminates all running goroutines
func (k *ParallelProcessor) Close() error {
k.logger.Debug("Initiated shutdown of processor goroutines")
close(k.closed)
k.wg.Wait()
k.logger.Info("Completed shutdown of processor goroutines")
return nil
}