mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-12-28 11:57:54 +08:00
116 lines
3.1 KiB
Go
116 lines
3.1 KiB
Go
package sub
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"os"
|
|
|
|
"cloud.google.com/go/pubsub"
|
|
"github.com/seaweedfs/seaweedfs/weed/glog"
|
|
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
|
|
"github.com/seaweedfs/seaweedfs/weed/util"
|
|
"google.golang.org/api/option"
|
|
"google.golang.org/protobuf/proto"
|
|
)
|
|
|
|
func init() {
|
|
NotificationInputs = append(NotificationInputs, &GooglePubSubInput{})
|
|
}
|
|
|
|
type GooglePubSubInput struct {
|
|
sub *pubsub.Subscription
|
|
topicName string
|
|
messageChan chan *pubsub.Message
|
|
}
|
|
|
|
func (k *GooglePubSubInput) GetName() string {
|
|
return "google_pub_sub"
|
|
}
|
|
|
|
func (k *GooglePubSubInput) Initialize(configuration util.Configuration, prefix string) error {
|
|
glog.V(0).Infof("notification.google_pub_sub.project_id: %v", configuration.GetString(prefix+"project_id"))
|
|
glog.V(0).Infof("notification.google_pub_sub.topic: %v", configuration.GetString(prefix+"topic"))
|
|
return k.initialize(
|
|
configuration.GetString(prefix+"google_application_credentials"),
|
|
configuration.GetString(prefix+"project_id"),
|
|
configuration.GetString(prefix+"topic"),
|
|
)
|
|
}
|
|
|
|
func (k *GooglePubSubInput) initialize(google_application_credentials, projectId, topicName string) (err error) {
|
|
|
|
ctx := context.Background()
|
|
// Creates a client.
|
|
if google_application_credentials == "" {
|
|
var found bool
|
|
google_application_credentials, found = os.LookupEnv("GOOGLE_APPLICATION_CREDENTIALS")
|
|
if !found {
|
|
glog.Fatalf("need to specific GOOGLE_APPLICATION_CREDENTIALS env variable or google_application_credentials in filer.toml")
|
|
}
|
|
}
|
|
|
|
client, err := pubsub.NewClient(ctx, projectId, option.WithCredentialsFile(google_application_credentials))
|
|
if err != nil {
|
|
glog.Fatalf("Failed to create client: %v", err)
|
|
}
|
|
|
|
k.topicName = topicName
|
|
topic := client.Topic(topicName)
|
|
if exists, err := topic.Exists(ctx); err == nil {
|
|
if !exists {
|
|
topic, err = client.CreateTopic(ctx, topicName)
|
|
if err != nil {
|
|
glog.Fatalf("Failed to create topic %s: %v", topicName, err)
|
|
}
|
|
}
|
|
} else {
|
|
glog.Fatalf("Failed to check topic %s: %v", topicName, err)
|
|
}
|
|
|
|
subscriptionName := "seaweedfs_sub"
|
|
|
|
k.sub = client.Subscription(subscriptionName)
|
|
if exists, err := k.sub.Exists(ctx); err == nil {
|
|
if !exists {
|
|
k.sub, err = client.CreateSubscription(ctx, subscriptionName, pubsub.SubscriptionConfig{Topic: topic})
|
|
if err != nil {
|
|
glog.Fatalf("Failed to create subscription %s: %v", subscriptionName, err)
|
|
}
|
|
}
|
|
} else {
|
|
glog.Fatalf("Failed to check subscription %s: %v", topicName, err)
|
|
}
|
|
|
|
k.messageChan = make(chan *pubsub.Message, 1)
|
|
|
|
go k.sub.Receive(ctx, func(ctx context.Context, m *pubsub.Message) {
|
|
k.messageChan <- m
|
|
})
|
|
|
|
return err
|
|
}
|
|
|
|
func (k *GooglePubSubInput) ReceiveMessage() (key string, message *filer_pb.EventNotification, onSuccessFn func(), onFailureFn func(), err error) {
|
|
|
|
m := <-k.messageChan
|
|
|
|
onSuccessFn = func() {
|
|
m.Ack()
|
|
}
|
|
onFailureFn = func() {
|
|
m.Nack()
|
|
}
|
|
|
|
// process the message
|
|
key = m.Attributes["key"]
|
|
message = &filer_pb.EventNotification{}
|
|
err = proto.Unmarshal(m.Data, message)
|
|
|
|
if err != nil {
|
|
err = fmt.Errorf("unmarshal message from google pubsub %s: %v", k.topicName, err)
|
|
return
|
|
}
|
|
|
|
return
|
|
}
|