broker: add ErrorHandler

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

broker/broker.go

@@ -41,11 +41,11 @@ type Broker interface {
 	// Disconnect disconnect from broker
 	Disconnect(ctx context.Context) error
 	// NewMessage create new broker message to publish.
-	NewMessage(ctx context.Context, hdr metadata.Metadata, body interface{}, opts ...MessageOption) (Message, error)
+	NewMessage(ctx context.Context, hdr metadata.Metadata, body any, opts ...MessageOption) (Message, error)
 	// Publish message to broker topic
 	Publish(ctx context.Context, topic string, messages ...Message) error
 	// Subscribe subscribes to topic message via handler
-	Subscribe(ctx context.Context, topic string, handler interface{}, opts ...SubscribeOption) (Subscriber, error)
+	Subscribe(ctx context.Context, topic string, handler any, opts ...SubscribeOption) (Subscriber, error)
 	// String type of broker
 	String() string
 	// Live returns broker liveness
@@ -59,7 +59,7 @@ type Broker interface {
 type (
 	FuncPublish   func(ctx context.Context, topic string, messages ...Message) error
 	HookPublish   func(next FuncPublish) FuncPublish
-	FuncSubscribe func(ctx context.Context, topic string, handler interface{}, opts ...SubscribeOption) (Subscriber, error)
+	FuncSubscribe func(ctx context.Context, topic string, handler any, opts ...SubscribeOption) (Subscriber, error)
 	HookSubscribe func(next FuncSubscribe) FuncSubscribe
 )
 
@@ -75,7 +75,7 @@ type Message interface {
 	Body() []byte
 	// Unmarshal try to decode message body to dst.
 	// This is helper method that uses codec.Unmarshal.
-	Unmarshal(dst interface{}, opts ...codec.Option) error
+	Unmarshal(dst any, opts ...codec.Option) error
 	// Ack acknowledge message if supported.
 	Ack() error
 }

broker/options.go

@@ -18,7 +18,6 @@ import (
 type Options struct {
 	// Name holds the broker name
 	Name string
-
 	// Tracer used for tracing
 	Tracer tracer.Tracer
 	// Register can be used for clustering
@@ -31,23 +30,20 @@ type Options struct {
 	Meter meter.Meter
 	// Context holds external options
 	Context context.Context
-
 	// Wait waits for a collection of goroutines to finish
 	Wait *sync.WaitGroup
 	// TLSConfig holds tls.TLSConfig options
 	TLSConfig *tls.Config
-
 	// Addrs holds the broker address
 	Addrs []string
-	// Hooks can be run before broker Publish/BatchPublish and
-	// Subscribe/BatchSubscribe methods
+	// Hooks can be run before broker Publishing and message processing in Subscribe
 	Hooks options.Hooks
-
 	// GracefulTimeout contains time to wait to finish in flight requests
 	GracefulTimeout time.Duration
-
 	// ContentType will be used if no content-type set when creating message
 	ContentType string
+	// ErrorHandler specifies handler for all broker errors handling subscriber
+	ErrorHandler any
 }
 
 // NewOptions create new Options
@@ -93,6 +89,13 @@ func ContentType(ct string) Option {
 	}
 }
 
+// ErrorHandler handles errors in broker
+func ErrorHandler(h any) Option {
+	return func(o *Options) {
+		o.ErrorHandler = h
+	}
+}
+
 // MessageOptions struct
 type MessageOptions struct {
 	// ContentType for message body