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package sub
import (
"fmt"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/sqs"
"github.com/chrislusf/seaweedfs/weed/util/log"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/util"
"github.com/golang/protobuf/proto"
)
func init() {
NotificationInputs = append(NotificationInputs, &AwsSqsInput{})
}
type AwsSqsInput struct {
svc *sqs.SQS
queueUrl string
}
func (k *AwsSqsInput) GetName() string {
return "aws_sqs"
}
func (k *AwsSqsInput) Initialize(configuration util.Configuration, prefix string) error {
log.Infof("replication.notification.aws_sqs.region: %v", configuration.GetString(prefix+"region"))
log.Infof("replication.notification.aws_sqs.sqs_queue_name: %v", configuration.GetString(prefix+"sqs_queue_name"))
return k.initialize(
configuration.GetString(prefix+"aws_access_key_id"),
configuration.GetString(prefix+"aws_secret_access_key"),
configuration.GetString(prefix+"region"),
configuration.GetString(prefix+"sqs_queue_name"),
)
}
func (k *AwsSqsInput) initialize(awsAccessKeyId, awsSecretAccessKey, region, queueName string) (err error) {
config := &aws.Config{
Region: aws.String(region),
}
if awsAccessKeyId != "" && awsSecretAccessKey != "" {
config.Credentials = credentials.NewStaticCredentials(awsAccessKeyId, awsSecretAccessKey, "")
}
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 *AwsSqsInput) ReceiveMessage() (key string, message *filer_pb.EventNotification, err error) {
// receive message
result, err := k.svc.ReceiveMessage(&sqs.ReceiveMessageInput{
AttributeNames: []*string{
aws.String(sqs.MessageSystemAttributeNameSentTimestamp),
},
MessageAttributeNames: []*string{
aws.String(sqs.QueueAttributeNameAll),
},
QueueUrl: &k.queueUrl,
MaxNumberOfMessages: aws.Int64(1),
VisibilityTimeout: aws.Int64(20), // 20 seconds
WaitTimeSeconds: aws.Int64(20),
})
if err != nil {
err = fmt.Errorf("receive message from sqs %s: %v", k.queueUrl, err)
return
}
if len(result.Messages) == 0 {
return
}
// process the message
// fmt.Printf("messages: %+v\n", result.Messages[0])
keyValue := result.Messages[0].MessageAttributes["key"]
key = *keyValue.StringValue
text := *result.Messages[0].Body
message = &filer_pb.EventNotification{}
err = proto.UnmarshalText(text, message)
// delete the message
_, err = k.svc.DeleteMessage(&sqs.DeleteMessageInput{
QueueUrl: &k.queueUrl,
ReceiptHandle: result.Messages[0].ReceiptHandle,
})
if err != nil {
log.Debugf("delete message from sqs %s: %v", k.queueUrl, err)
}
return
}
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