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event_sink.go
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/
event_sink.go
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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package agent
import (
"context"
"fmt"
"log"
"net"
"strings"
"sync"
"golang.org/x/sync/errgroup"
"google.golang.org/grpc"
"gopkg.in/yaml.v3"
eventsapi "github.com/siderolabs/siderolink/api/events"
"github.com/siderolabs/siderolink/pkg/events"
)
type adapter struct{}
// HandleEvent implements events.Adapter.
func (s *adapter) HandleEvent(_ context.Context, e events.Event) error {
data, err := yaml.Marshal(e.Payload)
if err != nil {
return err
}
log.Printf("Node: %s, Event: %s, ID: %s, Payload: \n\t%s", e.Node, e.TypeURL, e.ID, strings.Join(strings.Split(string(data), "\n"), "\n\t"))
return nil
}
func eventSink(ctx context.Context, apiEndpoint string, eg *errgroup.Group) error {
listen, err := net.Listen("tcp", apiEndpoint)
if err != nil {
return fmt.Errorf("error listening for gRPC eventsink API: %w", err)
}
server := grpc.NewServer()
sink := events.NewSink(&adapter{}, nil)
eventsapi.RegisterEventSinkServiceServer(server, sink)
stopServer := sync.OnceFunc(server.Stop)
eg.Go(func() error {
defer stopServer()
return server.Serve(listen)
})
context.AfterFunc(ctx, stopServer)
return nil
}