support AWS SQS as file change notification message queue

weed/notification/aws_sqs/aws_sqs_pub.go

@@ -0,0 +1,91 @@
+package aws_sqs
+
+import (
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/notification"
+	"github.com/chrislusf/seaweedfs/weed/util"
+	"github.com/golang/protobuf/proto"
+	"github.com/aws/aws-sdk-go/service/sqs"
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/session"
+	"fmt"
+	"github.com/aws/aws-sdk-go/aws/awserr"
+)
+
+func init() {
+	notification.MessageQueues = append(notification.MessageQueues, &AwsSqsPub{})
+}
+
+type AwsSqsPub struct {
+	svc      *sqs.SQS
+	queueUrl string
+}
+
+func (k *AwsSqsPub) GetName() string {
+	return "aws_sqs"
+}
+
+func (k *AwsSqsPub) Initialize(configuration util.Configuration) (err error) {
+	glog.V(0).Infof("filer.notification.aws_sqs.region: %v", configuration.GetString("region"))
+	glog.V(0).Infof("filer.notification.aws_sqs.sqs_queue_name: %v", configuration.GetString("sqs_queue_name"))
+	return k.initialize(
+		configuration.GetString("aws_access_key_id"),
+		configuration.GetString("aws_secret_access_key"),
+		configuration.GetString("region"),
+		configuration.GetString("sqs_queue_name"),
+	)
+}
+
+func (k *AwsSqsPub) initialize(awsAccessKeyId, aswSecretAccessKey, region, queueName string) (err error) {
+
+	config := &aws.Config{
+		Region: aws.String(region),
+	}
+	if awsAccessKeyId != "" && aswSecretAccessKey != "" {
+		config.Credentials = credentials.NewStaticCredentials(awsAccessKeyId, aswSecretAccessKey, "")
+	}
+
+	sess, err := session.NewSession(config)
+	if err != nil {
+		return fmt.Errorf("create aws session: %v", err)
+	}
+	k.svc = sqs.New(sess)
+
+	result, err := k.svc.GetQueueUrl(&sqs.GetQueueUrlInput{
+		QueueName: aws.String(queueName),
+	})
+	if err != nil {
+		if aerr, ok := err.(awserr.Error); ok && aerr.Code() == sqs.ErrCodeQueueDoesNotExist {
+			return fmt.Errorf("unable to find queue %s", queueName)
+		}
+		return fmt.Errorf("get queue %s url: %v", queueName, err)
+	}
+
+	k.queueUrl = *result.QueueUrl
+
+	return nil
+}
+
+func (k *AwsSqsPub) SendMessage(key string, message proto.Message) (err error) {
+
+	text := proto.MarshalTextString(message)
+
+	_, err = k.svc.SendMessage(&sqs.SendMessageInput{
+		DelaySeconds: aws.Int64(10),
+		MessageAttributes: map[string]*sqs.MessageAttributeValue{
+			"key": &sqs.MessageAttributeValue{
+				DataType:    aws.String("String"),
+				StringValue: aws.String(key),
+			},
+		},
+		MessageBody: aws.String(text),
+		QueueUrl:    &k.queueUrl,
+	})
+
+	if err != nil {
+		return fmt.Errorf("send message to sqs %s: %v", k.queueUrl, err)
+	}
+
+	return nil
+}