func (c *MqttClient) ForceDisconnect() {
if c.internalClient == nil || !c.internalClient.IsConnected() {
log.Warn("Already closed mqtt-server")
return
}
c.internalClient.ForceDisconnect()
log.Infof("ForceDisconnect mqtt-server: %v", c.setting.URL)
}
func (db *sqlxDB) CloseDB() error {
if db == nil || db.Dbm == nil {
return fmt.Errorf("Already closed db")
}
if err := db.Dbm.Close(); err != nil {
log.Warn("Failed to close Database !")
} else {
log.Info("Close Database !")
}
return nil
}
func (txn *sqlxTxn) Rollback() error {
if txn.Tx == nil {
return nil
}
log.Warn("sqlx#Rollback")
if err := txn.Tx.Rollback(); err != nil {
log.Error("Failed to rollback-transaction %v", err)
return err
}
txn.Dbm = nil
return nil
}
func (txn *gormTxn) Rollback() error {
if txn.Dbm == nil {
return nil
}
log.Warn("gorm#Rollback")
if err := txn.Dbm.Rollback().Error; err != nil {
log.Error("Failed to rollback-transaction %v", err)
return err
}
txn.Dbm = nil
return nil
}
func (c *MqttClient) Connect() error {
if c.internalClient == nil {
return fmt.Errorf("Already closed mqtt-server")
}
if c.internalClient.IsConnected() {
log.Warn("Already connected mqtt-server")
return nil
}
token := c.internalClient.Connect()
if token.Wait() && token.Error() != nil {
return fmt.Errorf("Failed to connect mqtt-server: %v", token.Error())
}
time.Sleep(2 * time.Second)
log.Infof("Connect mqtt-server: %v", c.setting.URL)
return nil
}
func (c *MqttClient) Subscribe(topic string, qos QoS, callback SubscribeMessageHandler) error {
token := c.internalClient.Subscribe(
topic,
byte(qos),
func(c *mqtt.Client, msg mqtt.Message) {
if msg == nil {
log.Warn("Subscribe message is nil")
return
}
if err := callback(msg); err != nil {
log.Errorf("Failed to subscript mqtt-server: %v", err)
return
}
},
)
if qos != QOS_ZERO {
token.Wait()
}
if token.Error() != nil {
return fmt.Errorf("Failed to subscript mqtt-server: %v", token.Error())
}
return nil
}