allow to override path in save/load/watch

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

consul.go

@@ -82,15 +82,23 @@ func (c *consulConfig) Init(opts ...config.Option) error {
 }
 
 func (c *consulConfig) Load(ctx context.Context, opts ...config.LoadOption) error {
+	path := c.path
+	options := config.NewLoadOptions(opts...)
+	if options.Context != nil {
+		if v, ok := options.Context.Value(pathKey{}).(string); ok && v != "" {
+			path = v
+		}
+	}
+
 	if err := config.DefaultBeforeLoad(ctx, c); err != nil {
 		return err
 	}
 
-	pair, _, err := c.cli.KV().Get(c.path, nil)
+	pair, _, err := c.cli.KV().Get(path, nil)
 	if err != nil {
-		err = fmt.Errorf("consul path %s load error: %w", c.path, err)
+		err = fmt.Errorf("consul path %s load error: %w", path, err)
 	} else if pair == nil {
-		err = fmt.Errorf("consul path %s load error: not found", c.path)
+		err = fmt.Errorf("consul path %s load error: not found", path)
 	}
 
 	if err != nil {
@@ -101,7 +109,6 @@ func (c *consulConfig) Load(ctx context.Context, opts ...config.LoadOption) erro
 		return config.DefaultAfterLoad(ctx, c)
 	}
 
-	options := config.NewLoadOptions(opts...)
 	mopts := []func(*mergo.Config){mergo.WithTypeCheck}
 	if options.Override {
 		mopts = append(mopts, mergo.WithOverride)
@@ -138,19 +145,27 @@ func (c *consulConfig) Load(ctx context.Context, opts ...config.LoadOption) erro
 }
 
 func (c *consulConfig) Save(ctx context.Context, opts ...config.SaveOption) error {
+	path := c.path
+	options := config.NewSaveOptions(opts...)
+	if options.Context != nil {
+		if v, ok := options.Context.Value(pathKey{}).(string); ok && v != "" {
+			path = v
+		}
+	}
+
 	if err := config.DefaultBeforeSave(ctx, c); err != nil {
 		return err
 	}
 
 	buf, err := c.opts.Codec.Marshal(c.opts.Struct)
 	if err == nil {
-		_, err = c.cli.KV().Put(&api.KVPair{Key: c.path, Value: buf}, nil)
+		_, err = c.cli.KV().Put(&api.KVPair{Key: path, Value: buf}, nil)
 	}
 
 	if err != nil {
-		c.opts.Logger.Errorf(c.opts.Context, "consul path %s save error: %v", c.path, err)
+		c.opts.Logger.Errorf(c.opts.Context, "consul path %s save error: %v", path, err)
 		if !c.opts.AllowFail {
-			return fmt.Errorf("consul path %s save error: %v", c.path, err)
+			return fmt.Errorf("consul path %s save error: %v", path, err)
 		}
 	}
 
@@ -170,9 +185,17 @@ func (c *consulConfig) Name() string {
 }
 
 func (c *consulConfig) Watch(ctx context.Context, opts ...config.WatchOption) (config.Watcher, error) {
+	path := c.path
+	options := config.NewWatchOptions(opts...)
+	if options.Context != nil {
+		if v, ok := options.Context.Value(pathKey{}).(string); ok && v != "" {
+			path = v
+		}
+	}
+
 	w := &consulWatcher{
 		cli:   c.cli,
-		path:  c.path,
+		path:  path,
 		opts:  c.opts,
 		wopts: config.NewWatchOptions(opts...),
 		done:  make(chan struct{}),

go.mod

@@ -16,5 +16,5 @@ require (
 	github.com/mitchellh/mapstructure v1.4.2 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/stretchr/testify v1.7.0 // indirect
-	go.unistack.org/micro/v3 v3.8.7
+	go.unistack.org/micro/v3 v3.8.9
 )

go.sum

@@ -164,8 +164,8 @@ github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/tv42/httpunix v0.0.0-20150427012821-b75d8614f926/go.mod h1:9ESjWnEqriFuLhtthL60Sar/7RFoluCcXsuvEwTV5KM=
 go.unistack.org/micro-proto/v3 v3.1.0 h1:q39FwjFiRZn+Ux/tt+d3bJTmDtsQQWa+3SLYVo1vLfA=
 go.unistack.org/micro-proto/v3 v3.1.0/go.mod h1:DpRhYCBXlmSJ/AAXTmntvlh7kQkYU6eFvlmYAx4BQS8=
-go.unistack.org/micro/v3 v3.8.7 h1:k1zOpJ3uS8MxdhK8annRsa5J/LW7MpqPjwYuekW61wE=
-go.unistack.org/micro/v3 v3.8.7/go.mod h1:KMMmOmbgo/D52/rCAbqeKbBsgEEbSKM69he54J3ZIuA=
+go.unistack.org/micro/v3 v3.8.9 h1:F+HAQSHI86F8Xx5D6XKvvuN0TtOuVvJM+OBV8aYTg0Y=
+go.unistack.org/micro/v3 v3.8.9/go.mod h1:KMMmOmbgo/D52/rCAbqeKbBsgEEbSKM69he54J3ZIuA=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20181029021203-45a5f77698d3/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=

options.go

@@ -44,3 +44,15 @@ type timeoutKey struct{}
 func Timeout(td time.Duration) config.Option {
 	return config.SetOption(timeoutKey{}, td)
 }
+
+func LoadPath(path string) config.LoadOption {
+	return config.SetLoadOption(pathKey{}, path)
+}
+
+func SavePath(path string) config.SaveOption {
+	return config.SetSaveOption(pathKey{}, path)
+}
+
+func WatchPath(path string) config.WatchOption {
+	return config.SetWatchOption(pathKey{}, path)
+}