59 lines
1.1 KiB
Go
59 lines
1.1 KiB
Go
package events
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import (
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"context"
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"github.com/Sirupsen/logrus"
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"github.com/docker/containerd/log"
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)
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var (
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G = GetPoster
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)
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// Poster posts the event.
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type Poster interface {
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Post(ctx context.Context, event Event)
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}
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type posterKey struct{}
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func WithPoster(ctx context.Context, poster Poster) context.Context {
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return context.WithValue(ctx, posterKey{}, poster)
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}
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func GetPoster(ctx context.Context) Poster {
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poster := ctx.Value(posterKey{})
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if poster == nil {
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logger := log.G(ctx)
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tx, _ := getTx(ctx)
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topic := getTopic(ctx)
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// likely means we don't have a configured event system. Just return
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// the default poster, which merely logs events.
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return posterFunc(func(ctx context.Context, event Event) {
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fields := logrus.Fields{"event": event}
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if topic != "" {
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fields["topic"] = topic
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}
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if tx != nil {
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fields["tx.id"] = tx.id
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if tx.parent != nil {
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fields["tx.parent.id"] = tx.parent.id
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}
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}
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logger.WithFields(fields).Info("event posted")
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})
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}
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return poster.(Poster)
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}
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type posterFunc func(ctx context.Context, event Event)
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func (fn posterFunc) Post(ctx context.Context, event Event) {
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fn(ctx, event)
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}
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