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
|
// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package protocol
import (
"bytes"
"context"
"sync"
"cuelang.org/go/internal/golangorgx/tools/event"
"cuelang.org/go/internal/golangorgx/tools/event/core"
"cuelang.org/go/internal/golangorgx/tools/event/export"
"cuelang.org/go/internal/golangorgx/tools/event/label"
"cuelang.org/go/internal/golangorgx/tools/xcontext"
)
type contextKey int
const (
clientKey = contextKey(iota)
)
func WithClient(ctx context.Context, client Client) context.Context {
return context.WithValue(ctx, clientKey, client)
}
func LogEvent(ctx context.Context, ev core.Event, lm label.Map, mt MessageType) context.Context {
client, ok := ctx.Value(clientKey).(Client)
if !ok {
return ctx
}
buf := &bytes.Buffer{}
p := export.Printer{}
p.WriteEvent(buf, ev, lm)
msg := &LogMessageParams{Type: mt, Message: buf.String()}
// Handle messages generated via event.Error, which won't have a level Label.
if event.IsError(ev) {
msg.Type = Error
}
// The background goroutine lives forever once started,
// and ensures log messages are sent in order (#61216).
startLogSenderOnce.Do(func() {
go func() {
for f := range logQueue {
f()
}
}()
})
// Add the log item to a queue, rather than sending a
// window/logMessage request to the client synchronously,
// which would slow down this thread.
ctx2 := xcontext.Detach(ctx)
logQueue <- func() { client.LogMessage(ctx2, msg) }
return ctx
}
var (
startLogSenderOnce sync.Once
logQueue = make(chan func(), 100) // big enough for a large transient burst
)
|
