Add KV store providers (dynamic configuration only)

Co-authored-by: Jean-Baptiste Doumenjou <jb.doumenjou@gmail.com>

pkg/provider/kv/storewrapper.go

@@ -0,0 +1,118 @@
+package kv
+
+import (
+	"github.com/abronan/valkeyrie/store"
+	"github.com/containous/traefik/v2/pkg/log"
+)
+
+type storeWrapper struct {
+	store.Store
+}
+
+func (s *storeWrapper) Put(key string, value []byte, options *store.WriteOptions) error {
+	log.WithoutContext().Debugf("Put: %s", key, string(value))
+
+	if s.Store == nil {
+		return nil
+	}
+	return s.Store.Put(key, value, options)
+}
+
+func (s *storeWrapper) Get(key string, options *store.ReadOptions) (*store.KVPair, error) {
+	log.WithoutContext().Debugf("Get: %s", key)
+
+	if s.Store == nil {
+		return nil, nil
+	}
+	return s.Store.Get(key, options)
+}
+
+func (s *storeWrapper) Delete(key string) error {
+	log.WithoutContext().Debugf("Delete: %s", key)
+
+	if s.Store == nil {
+		return nil
+	}
+	return s.Store.Delete(key)
+}
+
+func (s *storeWrapper) Exists(key string, options *store.ReadOptions) (bool, error) {
+	log.WithoutContext().Debugf("Exists: %s", key)
+
+	if s.Store == nil {
+		return true, nil
+	}
+	return s.Store.Exists(key, options)
+}
+
+func (s *storeWrapper) Watch(key string, stopCh <-chan struct{}, options *store.ReadOptions) (<-chan *store.KVPair, error) {
+	log.WithoutContext().Debugf("Watch: %s", key)
+
+	if s.Store == nil {
+		return nil, nil
+	}
+	return s.Store.Watch(key, stopCh, options)
+}
+
+func (s *storeWrapper) WatchTree(directory string, stopCh <-chan struct{}, options *store.ReadOptions) (<-chan []*store.KVPair, error) {
+	log.WithoutContext().Debugf("WatchTree: %s", directory)
+
+	if s.Store == nil {
+		return nil, nil
+	}
+	return s.Store.WatchTree(directory, stopCh, options)
+}
+
+func (s *storeWrapper) NewLock(key string, options *store.LockOptions) (store.Locker, error) {
+	log.WithoutContext().Debugf("NewLock: %s", key)
+
+	if s.Store == nil {
+		return nil, nil
+	}
+	return s.Store.NewLock(key, options)
+}
+
+func (s *storeWrapper) List(directory string, options *store.ReadOptions) ([]*store.KVPair, error) {
+	log.WithoutContext().Debugf("List: %s", directory)
+
+	if s.Store == nil {
+		return nil, nil
+	}
+	return s.Store.List(directory, options)
+}
+
+func (s *storeWrapper) DeleteTree(directory string) error {
+	log.WithoutContext().Debugf("DeleteTree: %s", directory)
+
+	if s.Store == nil {
+		return nil
+	}
+	return s.Store.DeleteTree(directory)
+}
+
+func (s *storeWrapper) AtomicPut(key string, value []byte, previous *store.KVPair, options *store.WriteOptions) (bool, *store.KVPair, error) {
+	log.WithoutContext().Debugf("AtomicPut: %s", key, string(value), previous)
+
+	if s.Store == nil {
+		return true, nil, nil
+	}
+	return s.Store.AtomicPut(key, value, previous, options)
+}
+
+func (s *storeWrapper) AtomicDelete(key string, previous *store.KVPair) (bool, error) {
+	log.WithoutContext().Debugf("AtomicDelete: %s", key, previous)
+
+	if s.Store == nil {
+		return true, nil
+	}
+	return s.Store.AtomicDelete(key, previous)
+}
+
+func (s *storeWrapper) Close() {
+	log.WithoutContext().Debugf("Close")
+
+	if s.Store == nil {
+		return
+	}
+	s.Store.Close()
+}