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go/internal/lsp/protocol/context.go
Ian Cottrell cb106d260e internal/telemetry: allow ProcessEvent to modify the event
This allows early exporters to adjust the event for later ones.
This is used to lookup key values from the context if needed.
Also add a Query type event which is intended to perform all event
modifications but nothing else, and is used to lookup values from
the context. This cleans up a weirdness where the current lookup
presumes there will be an exporter with a matching mechanism.

Change-Id: I835d1e0b2511553c30f94b7becfe7b7b5462c111
Reviewed-on: https://go-review.googlesource.com/c/tools/+/223657
Run-TryBot: Ian Cottrell <iancottrell@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
2020-03-18 13:22:01 +00:00

36 lines
692 B
Go

package protocol
import (
"context"
"fmt"
"golang.org/x/tools/internal/telemetry/event"
"golang.org/x/tools/internal/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 event.Event) (context.Context, event.Event) {
if !ev.IsLog() {
return ctx, ev
}
client, ok := ctx.Value(clientKey).(Client)
if !ok {
return ctx, ev
}
msg := &LogMessageParams{Type: Info, Message: fmt.Sprint(ev)}
if ev.Error != nil {
msg.Type = Error
}
go client.LogMessage(xcontext.Detach(ctx), msg)
return ctx, ev
}