fix: Add nil safety to IsClosed and Close eventbus connection methods (…

…#2839)

Signed-off-by: gokulav137 <gokulav999@gmail.com>
Signed-off-by: gokulav137 <52277763+gokulav137@users.noreply.github.com>

eventbus/jetstream/eventsource/source_conn.go

@@ -35,3 +35,14 @@ func (jsc *JetstreamSourceConn) Publish(ctx context.Context,
 	jsc.Logger.Debugf("published message to subject %s", subject)
 	return err
 }
+
+func (conn *JetstreamSourceConn) IsClosed() bool {
+	return conn == nil || conn.JetstreamConnection.IsClosed()
+}
+
+func (conn *JetstreamSourceConn) Close() error {
+	if conn == nil {
+		return fmt.Errorf("can't close Jetstream source connection, JetstreamSourceConn is nil")
+	}
+	return conn.JetstreamConnection.Close()
+}

eventbus/jetstream/sensor/trigger_conn.go

@@ -83,6 +83,17 @@ func NewJetstreamTriggerConn(conn *jetstreambase.JetstreamConnection,
 	return connection, nil
 }
 
+func (conn *JetstreamTriggerConn) IsClosed() bool {
+	return conn == nil || conn.JetstreamConnection.IsClosed()
+}
+
+func (conn *JetstreamTriggerConn) Close() error {
+	if conn == nil {
+		return fmt.Errorf("can't close Jetstream trigger connection, JetstreamTriggerConn is nil")
+	}
+	return conn.JetstreamConnection.Close()
+}
+
 func (conn *JetstreamTriggerConn) String() string {
 	if conn == nil {
 		return ""

eventbus/kafka/sensor/trigger_conn.go

@@ -53,11 +53,14 @@ func (c *KafkaTriggerConnection) String() string {
 }
 
 func (c *KafkaTriggerConnection) Close() error {
+	if c.close == nil {
+		return fmt.Errorf("can't close Kafka trigger connection, close function is nil")
+	}
 	return c.close()
 }
 
 func (c *KafkaTriggerConnection) IsClosed() bool {
-	return c.isClosed()
+	return c.isClosed == nil || c.isClosed()
 }
 
 func (c *KafkaTriggerConnection) Subscribe(

eventbus/stan/eventsource/source_conn.go

@@ -21,3 +21,14 @@ func (n *STANSourceConn) Publish(ctx context.Context,
 	}
 	return n.STANConn.Publish(n.subject, msg.Body)
 }
+
+func (conn *STANSourceConn) IsClosed() bool {
+	return conn == nil || conn.STANConnection.IsClosed()
+}
+
+func (conn *STANSourceConn) Close() error {
+	if conn == nil {
+		return fmt.Errorf("can't close STAN source connection, STANSourceConn is nil")
+	}
+	return conn.STANConnection.Close()
+}

eventbus/stan/sensor/trigger_conn.go

@@ -42,6 +42,17 @@ func (n *STANTriggerConn) String() string {
 	return fmt.Sprintf("STANTriggerConn{ClientID:%s,Sensor:%s,Trigger:%s}", n.ClientID, n.sensorName, n.triggerName)
 }
 
+func (conn *STANTriggerConn) IsClosed() bool {
+	return conn == nil || conn.STANConnection.IsClosed()
+}
+
+func (conn *STANTriggerConn) Close() error {
+	if conn == nil {
+		return fmt.Errorf("can't close STAN trigger connection, STANTriggerConn is nil")
+	}
+	return conn.STANConnection.Close()
+}
+
 // Subscribe is used to subscribe to multiple event source dependencies
 // Parameter - ctx, context
 // Parameter - conn, eventbus connection