add check consumer

jetstream_consumer.go

@@ -0,0 +1,31 @@
+package natsio
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/nats-io/nats.go"
+)
+
+// GetConsumerInfo ...
+func (js JetStream) GetConsumerInfo(stream, name string) (*nats.ConsumerInfo, error) {
+	return js.instance.ConsumerInfo(stream, name)
+}
+
+// AddConsumer ...
+func (js JetStream) AddConsumer(stream, subject, name string) error {
+	channel := combineStreamAndSubjectName(stream, subject)
+
+	// Add
+	_, err := js.instance.AddConsumer(stream, &nats.ConsumerConfig{
+		Durable:       name,
+		AckPolicy:     nats.AckExplicitPolicy,
+		FilterSubject: channel,
+	})
+
+	if err != nil {
+		msg := fmt.Sprintf("[NATS JETSTREAM] - add consumer %s for stream #%s error: %s", name, stream, err.Error())
+		return errors.New(msg)
+	}
+	return nil
+}