106 lines
2.6 KiB
Go
106 lines
2.6 KiB
Go
/*
|
|
Copyright 2023 The Flux authors
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package notifier
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
"errors"
|
|
"fmt"
|
|
|
|
eventv1 "github.com/fluxcd/pkg/apis/event/v1beta1"
|
|
"github.com/nats-io/nats.go"
|
|
"sigs.k8s.io/controller-runtime/pkg/log"
|
|
)
|
|
|
|
type (
|
|
// NATS holds a NATS client and target subject.
|
|
NATS struct {
|
|
subject string
|
|
client interface {
|
|
publish(ctx context.Context, subject string, eventPayload []byte) (err error)
|
|
}
|
|
}
|
|
|
|
natsClient struct {
|
|
server string
|
|
username string
|
|
password string
|
|
}
|
|
)
|
|
|
|
func NewNATS(server string, subject string, username string, password string) (*NATS, error) {
|
|
if server == "" {
|
|
return nil, errors.New("NATS server (address) cannot be empty")
|
|
}
|
|
if subject == "" {
|
|
return nil, errors.New("NATS subject (channel) cannot be empty")
|
|
}
|
|
return &NATS{
|
|
subject: subject,
|
|
client: &natsClient{
|
|
server: server,
|
|
username: username,
|
|
password: password,
|
|
},
|
|
}, nil
|
|
}
|
|
|
|
// Post posts Flux events to a NATS subject.
|
|
func (n *NATS) Post(ctx context.Context, event eventv1.Event) error {
|
|
// Skip Git commit status update event.
|
|
if event.HasMetadata(eventv1.MetaCommitStatusKey, eventv1.MetaCommitStatusUpdateValue) {
|
|
return nil
|
|
}
|
|
|
|
eventPayload, err := json.Marshal(event)
|
|
if err != nil {
|
|
return fmt.Errorf("error json-marshaling event: %w", err)
|
|
}
|
|
|
|
err = n.client.publish(ctx, n.subject, eventPayload)
|
|
if err != nil {
|
|
return fmt.Errorf("error publishing event to subject %s: %w", n.subject, err)
|
|
}
|
|
|
|
// debug log
|
|
log.FromContext(ctx).V(1).Info("Event published to NATS subject", "subject", n.subject)
|
|
|
|
return nil
|
|
}
|
|
|
|
func (n *natsClient) publish(ctx context.Context, subject string, eventPayload []byte) (err error) {
|
|
opts := []nats.Option{nats.Name("NATS Provider Publisher")}
|
|
if n.username != "" && n.password != "" {
|
|
opts = append(opts, nats.UserInfo(n.username, n.password))
|
|
}
|
|
|
|
nc, err := nats.Connect(n.server, opts...)
|
|
if err != nil {
|
|
return fmt.Errorf("error connecting to server: %w", err)
|
|
}
|
|
defer nc.Close()
|
|
|
|
nc.Publish(subject, eventPayload)
|
|
nc.Flush()
|
|
if err = nc.LastError(); err != nil {
|
|
return fmt.Errorf("error publishing message to server: %w", err)
|
|
}
|
|
|
|
return err
|
|
}
|