56 lines
1.9 KiB
Go
56 lines
1.9 KiB
Go
package mq
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
)
|
|
|
|
// NormalizeSubscriptionSet validates and canonicalizes a module declaration.
|
|
func NormalizeSubscriptionSet(set SubscriptionSet) (SubscriptionSet, error) {
|
|
set.Owner = strings.TrimSpace(set.Owner)
|
|
set.Provider = strings.ToLower(strings.TrimSpace(set.Provider))
|
|
if set.Owner == "" {
|
|
return SubscriptionSet{}, fmt.Errorf("mq subscription owner is empty")
|
|
}
|
|
if set.Provider != ProviderEMQX && set.Provider != ProviderRabbitMQ {
|
|
return SubscriptionSet{}, fmt.Errorf("unsupported mq provider %q", set.Provider)
|
|
}
|
|
if len(set.Topics) == 0 {
|
|
return SubscriptionSet{}, fmt.Errorf("mq subscription topics are empty")
|
|
}
|
|
seen := make(map[string]struct{}, len(set.Topics))
|
|
for index := range set.Topics {
|
|
set.Topics[index].Topic = strings.TrimSpace(set.Topics[index].Topic)
|
|
if set.Topics[index].Topic == "" {
|
|
return SubscriptionSet{}, fmt.Errorf("mq subscription topic at index %d is empty", index)
|
|
}
|
|
if set.Topics[index].QoS > ExactlyOnce {
|
|
return SubscriptionSet{}, fmt.Errorf("invalid mq qos %d for topic %q", set.Topics[index].QoS, set.Topics[index].Topic)
|
|
}
|
|
if set.Topics[index].Handler == nil {
|
|
return SubscriptionSet{}, fmt.Errorf("mq subscription handler is nil for topic %q", set.Topics[index].Topic)
|
|
}
|
|
if _, exists := seen[set.Topics[index].Topic]; exists {
|
|
return SubscriptionSet{}, fmt.Errorf("duplicate mq subscription topic %q", set.Topics[index].Topic)
|
|
}
|
|
seen[set.Topics[index].Topic] = struct{}{}
|
|
}
|
|
return set, nil
|
|
}
|
|
|
|
// ApplySubscriptions activates dependency-bearing module contributors.
|
|
func ApplySubscriptions(registrar SubscriptionRegistrar, contributors ...SubscriptionContributor) error {
|
|
if registrar == nil {
|
|
return fmt.Errorf("mq subscription registrar is nil")
|
|
}
|
|
for _, contributor := range contributors {
|
|
if contributor == nil {
|
|
continue
|
|
}
|
|
if err := contributor.RegisterSubscriptions(registrar); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|