add Live/Ready/Health methods

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

store/memory/memory.go

@@ -149,6 +149,18 @@ func (m *memoryStore) Name() string {
 	return m.opts.Name
 }
 
+func (m *memoryStore) Live() bool {
+	return true
+}
+
+func (m *memoryStore) Ready() bool {
+	return true
+}
+
+func (m *memoryStore) Health() bool {
+	return true
+}
+
 func (m *memoryStore) Exists(ctx context.Context, key string, opts ...store.ExistsOption) error {
 	if m.opts.LazyConnect {
 		if err := m.connect(ctx); err != nil {
@@ -279,3 +291,16 @@ func (m *memoryStore) connect(ctx context.Context) error {
 	m.isConnected.CompareAndSwap(0, 1)
 	return nil
 }
+
+func (m *memoryStore) Watch(ctx context.Context, opts ...store.WatchOption) (store.Watcher, error) {
+	return &watcher{}, nil
+}
+
+type watcher struct{}
+
+func (w *watcher) Next() (store.Event, error) {
+	return nil, nil
+}
+
+func (w *watcher) Stop() {
+}

store/noop.go

@@ -23,6 +23,18 @@ type noopStore struct {
 	isConnected atomic.Int32
 }
 
+func (n *noopStore) Live() bool {
+	return true
+}
+
+func (n *noopStore) Ready() bool {
+	return true
+}
+
+func (n *noopStore) Health() bool {
+	return true
+}
+
 func NewStore(opts ...Option) *noopStore {
 	options := NewOptions(opts...)
 	return &noopStore{opts: options}

store/store.go

@@ -45,7 +45,14 @@ type Store interface {
 	Disconnect(ctx context.Context) error
 	// String returns the name of the implementation.
 	String() string
+	// Watch returns events watcher
 	Watch(ctx context.Context, opts ...WatchOption) (Watcher, error)
+	// Live returns store liveness
+	Live() bool
+	// Ready returns store readiness
+	Ready() bool
+	// Health returns store health
+	Health() bool
 }
 
 type (

store/wrapper.go

@@ -70,3 +70,15 @@ func (w *NamespaceStore) String() string {
 func (w *NamespaceStore) Watch(ctx context.Context, opts ...WatchOption) (Watcher, error) {
 	return w.s.Watch(ctx, opts...)
 }
+
+func (w *NamespaceStore) Live() bool {
+	return w.s.Live()
+}
+
+func (w *NamespaceStore) Ready() bool {
+	return w.s.Ready()
+}
+
+func (w *NamespaceStore) Health() bool {
+	return w.s.Health()
+}