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metadata.go
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metadata.go
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package snssqs
import (
"errors"
"fmt"
"strconv"
"github.com/dapr/components-contrib/pubsub"
)
type snsSqsMetadata struct {
// aws endpoint for the component to use.
Endpoint string
// access key to use for accessing sqs/sns.
AccessKey string
// secret key to use for accessing sqs/sns.
SecretKey string
// aws session token to use.
SessionToken string
// aws region in which SNS/SQS should create resources.
Region string
// name of the queue for this application. The is provided by the runtime as "consumerID".
sqsQueueName string
// name of the dead letter queue for this application.
sqsDeadLettersQueueName string
// flag to SNS and SQS FIFO.
fifo bool
// a namespace for SNS SQS FIFO to order messages within that group. limits consumer concurrency if set but guarantees that all
// published messages would be ordered by their arrival time to SQS.
// see: https://aws.amazon.com/blogs/compute/solving-complex-ordering-challenges-with-amazon-sqs-fifo-queues/
fifoMessageGroupID string
// amount of time in seconds that a message is hidden from receive requests after it is sent to a subscriber. Default: 10.
messageVisibilityTimeout int64
// number of times to resend a message after processing of that message fails before removing that message from the queue. Default: 10.
messageRetryLimit int64
// upon reaching the messageRetryLimit, disables the default deletion behaviour of the message from the SQS queue, and resetting the message visibilty on SQS
// so that other consumers can try consuming that message.
disableDeleteOnRetryLimit bool
// if sqsDeadLettersQueueName is set to a value, then the messageReceiveLimit defines the number of times a message is received
// before it is moved to the dead-letters queue. This value must be smaller than messageRetryLimit.
messageReceiveLimit int64
// amount of time to await receipt of a message before making another request. Default: 2.
messageWaitTimeSeconds int64
// maximum number of messages to receive from the queue at a time. Default: 10, Maximum: 10.
messageMaxNumber int64
// disable resource provisioning of SNS and SQS.
disableEntityManagement bool
// assets creation timeout.
assetsManagementTimeoutSeconds float64
// aws account ID. internally resolved if not given.
accountID string
// processing concurrency mode
concurrencyMode pubsub.ConcurrencyMode
}
func getAliasedProperty(aliases []string, metadata pubsub.Metadata) (string, bool) {
props := metadata.Properties
for _, s := range aliases {
if val, ok := props[s]; ok {
return val, true
}
}
return "", false
}
func parseInt64(input string, propertyName string) (int64, error) {
number, err := strconv.Atoi(input)
if err != nil {
return -1, fmt.Errorf("parsing %s failed with: %w", propertyName, err)
}
return int64(number), nil
}
func parseBool(input string, propertyName string) (bool, error) {
val, err := strconv.ParseBool(input)
if err != nil {
return false, fmt.Errorf("parsing %s failed with: %w", propertyName, err)
}
return val, nil
}
func parseFloat64(input string, propertyName string) (float64, error) {
val, err := strconv.ParseFloat(input, 64)
if err != nil {
return 0, fmt.Errorf("parsing %s failed with: %w", propertyName, err)
}
return val, nil
}
func maskLeft(s string) string {
rs := []rune(s)
for i := 0; i < len(rs)-4; i++ {
rs[i] = 'X'
}
return string(rs)
}
func (s *snsSqs) getSnsSqsMetatdata(metadata pubsub.Metadata) (*snsSqsMetadata, error) {
md := &snsSqsMetadata{}
if err := md.setCredsAndQueueNameConfig(metadata); err != nil {
return nil, err
}
props := metadata.Properties
if err := md.setMessageVisibilityTimeout(props); err != nil {
return nil, err
}
if err := md.setMessageRetryLimit(props); err != nil {
return nil, err
}
if err := md.setDeadlettersQueueConfig(props); err != nil {
return nil, err
}
if err := md.setDisableDeleteOnRetryLimit(props); err != nil {
return nil, err
}
if err := md.setFifoConfig(props); err != nil {
return nil, err
}
if err := md.setMessageWaitTimeSeconds(props); err != nil {
return nil, err
}
if err := md.setMessageMaxNumber(props); err != nil {
return nil, err
}
if err := md.setDisableEntityManagement(props); err != nil {
return nil, err
}
if err := md.setAssetsManagementTimeoutSeconds(props); err != nil {
return nil, err
}
if err := md.setConcurrencyMode(props); err != nil {
return nil, err
}
s.logger.Debug(md.hideDebugPrintedCredentials())
return md, nil
}
func (md *snsSqsMetadata) setConcurrencyMode(props map[string]string) error {
c, err := pubsub.Concurrency(props)
if err != nil {
return err
}
md.concurrencyMode = c
return nil
}
func (md *snsSqsMetadata) hideDebugPrintedCredentials() string {
mdCopy := *md
mdCopy.AccessKey = maskLeft(md.AccessKey)
mdCopy.SecretKey = maskLeft(md.SecretKey)
mdCopy.SessionToken = maskLeft(md.SessionToken)
return fmt.Sprintf("%#v\n", mdCopy)
}
func (md *snsSqsMetadata) setCredsAndQueueNameConfig(metadata pubsub.Metadata) error {
if val, ok := getAliasedProperty([]string{"Endpoint", "endpoint"}, metadata); ok {
md.Endpoint = val
}
if val, ok := getAliasedProperty([]string{"awsAccountID", "accessKey"}, metadata); ok {
md.AccessKey = val
}
if val, ok := getAliasedProperty([]string{"awsSecret", "secretKey"}, metadata); ok {
md.SecretKey = val
}
if val, ok := metadata.Properties["sessionToken"]; ok {
md.SessionToken = val
}
if val, ok := getAliasedProperty([]string{"awsRegion", "region"}, metadata); ok {
md.Region = val
}
if val, ok := metadata.Properties["consumerID"]; ok {
md.sqsQueueName = val
} else {
return errors.New("consumerID must be set")
}
return nil
}
func (md *snsSqsMetadata) setAssetsManagementTimeoutSeconds(props map[string]string) error {
if val, ok := props["assetsManagementTimeoutSeconds"]; ok {
parsed, err := parseFloat64(val, "assetsManagementTimeoutSeconds")
if err != nil {
return err
}
md.assetsManagementTimeoutSeconds = parsed
} else {
md.assetsManagementTimeoutSeconds = assetsManagementDefaultTimeoutSeconds
}
return nil
}
func (md *snsSqsMetadata) setDisableEntityManagement(props map[string]string) error {
if val, ok := props["disableEntityManagement"]; ok {
parsed, err := parseBool(val, "disableEntityManagement")
if err != nil {
return err
}
md.disableEntityManagement = parsed
}
return nil
}
func (md *snsSqsMetadata) setMessageMaxNumber(props map[string]string) error {
if val, ok := props["messageMaxNumber"]; !ok {
md.messageMaxNumber = 10
} else {
maxNumber, err := parseInt64(val, "messageMaxNumber")
if err != nil {
return err
}
if maxNumber < 1 {
return errors.New("messageMaxNumber must be greater than 0")
} else if maxNumber > 10 {
return errors.New("messageMaxNumber must be less than or equal to 10")
}
md.messageMaxNumber = maxNumber
}
return nil
}
func (md *snsSqsMetadata) setMessageWaitTimeSeconds(props map[string]string) error {
if val, ok := props["messageWaitTimeSeconds"]; !ok {
md.messageWaitTimeSeconds = 2
} else {
waitTime, err := parseInt64(val, "messageWaitTimeSeconds")
if err != nil {
return err
}
if waitTime < 1 {
return errors.New("messageWaitTimeSeconds must be greater than 0")
}
md.messageWaitTimeSeconds = waitTime
}
return nil
}
func (md *snsSqsMetadata) setFifoConfig(props map[string]string) error {
// fifo settings: enable/disable SNS and SQS FIFO.
if val, ok := props["fifo"]; ok {
fifo, err := parseBool(val, "fifo")
if err != nil {
return err
}
md.fifo = fifo
} else {
md.fifo = false
}
// fifo settings: assign user provided Message Group ID
// for more details, see: https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/using-messagegroupid-property.html
if val, ok := props["fifoMessageGroupID"]; ok {
md.fifoMessageGroupID = val
}
return nil
}
func (md *snsSqsMetadata) setDeadlettersQueueConfig(props map[string]string) error {
if val, ok := props["sqsDeadLettersQueueName"]; ok {
md.sqsDeadLettersQueueName = val
}
if val, ok := props["messageReceiveLimit"]; ok {
messageReceiveLimit, err := parseInt64(val, "messageReceiveLimit")
if err != nil {
return err
}
// assign: used provided configuration
md.messageReceiveLimit = messageReceiveLimit
}
// XOR on having either a valid messageReceiveLimit and invalid sqsDeadLettersQueueName, and vice versa.
if (md.messageReceiveLimit > 0 || len(md.sqsDeadLettersQueueName) > 0) && !(md.messageReceiveLimit > 0 && len(md.sqsDeadLettersQueueName) > 0) {
return errors.New("to use SQS dead letters queue, messageReceiveLimit and sqsDeadLettersQueueName must both be set to a value")
}
return nil
}
func (md *snsSqsMetadata) setDisableDeleteOnRetryLimit(props map[string]string) error {
if val, ok := props["disableDeleteOnRetryLimit"]; ok {
disableDeleteOnRetryLimit, err := parseBool(val, "disableDeleteOnRetryLimit")
if err != nil {
return err
}
if len(md.sqsDeadLettersQueueName) > 0 && disableDeleteOnRetryLimit {
return errors.New("configuration conflict: 'disableDeleteOnRetryLimit' cannot be set to 'true' when 'sqsDeadLettersQueueName' is set to a value. either remove this configuration or set 'disableDeleteOnRetryLimit' to 'false'")
}
md.disableDeleteOnRetryLimit = disableDeleteOnRetryLimit
} else {
// default when not configured.
md.disableDeleteOnRetryLimit = false
}
return nil
}
func (md *snsSqsMetadata) setMessageRetryLimit(props map[string]string) error {
if val, ok := props["messageRetryLimit"]; !ok {
md.messageRetryLimit = 10
} else {
retryLimit, err := parseInt64(val, "messageRetryLimit")
if err != nil {
return err
}
if retryLimit < 2 {
return errors.New("messageRetryLimit must be greater than 1")
}
md.messageRetryLimit = retryLimit
}
return nil
}
func (md *snsSqsMetadata) setMessageVisibilityTimeout(props map[string]string) error {
if val, ok := props["messageVisibilityTimeout"]; !ok {
md.messageVisibilityTimeout = 10
} else {
timeout, err := parseInt64(val, "messageVisibilityTimeout")
if err != nil {
return err
}
if timeout < 1 {
return errors.New("messageVisibilityTimeout must be greater than 0")
}
md.messageVisibilityTimeout = timeout
}
return nil
}