/
batch.go
84 lines (75 loc) · 2.47 KB
/
batch.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
/*
*
* k6 - a next-generation load testing tool
* Copyright (C) 2019 Load Impact
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package httpext
import (
"context"
"sync/atomic"
"github.com/loadimpact/k6/lib"
)
// BatchParsedHTTPRequest extends the normal parsed HTTP request with a pointer
// to a Response object, so that the batch goroutines can concurrently store the
// responses they receive, without any locking.
type BatchParsedHTTPRequest struct {
*ParsedHTTPRequest
Response *Response // this is modified by MakeBatchRequests()
}
// MakeBatchRequests concurrently makes multiple requests. It spawns
// min(reqCount, globalLimit) goroutines that asynchronously process all
// requests coming from the requests channel. Responses are recorded in the
// pointers contained in each BatchParsedHTTPRequest object, so they need to be
// pre-initialized. In addition, each processed request would emit either a nil
// value, or an error, via the returned errors channel. The goroutines exit when
// the requests channel is closed.
func MakeBatchRequests(
ctx context.Context,
requests []BatchParsedHTTPRequest,
reqCount, globalLimit, perHostLimit int,
) <-chan error {
workers := globalLimit
if reqCount < workers {
workers = reqCount
}
result := make(chan error, reqCount)
perHostLimiter := lib.NewMultiSlotLimiter(perHostLimit)
makeRequest := func(req BatchParsedHTTPRequest) {
if hl := perHostLimiter.Slot(req.URL.GetURL().Host); hl != nil {
hl.Begin()
defer hl.End()
}
resp, err := MakeRequest(ctx, req.ParsedHTTPRequest)
if resp != nil {
*req.Response = *resp
}
result <- err
}
counter, i32reqCount := int32(-1), int32(reqCount)
for i := 0; i < workers; i++ {
go func() {
for {
reqNum := atomic.AddInt32(&counter, 1)
if reqNum >= i32reqCount {
return
}
makeRequest(requests[reqNum])
}
}()
}
return result
}