/
mqtt.go
63 lines (52 loc) · 1.99 KB
/
mqtt.go
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/*******************************************************************************
* Copyright © 2017-2018 VMware, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*
* @author: Huaqiao Zhang, <huaqiaoz@vmware.com>
*******************************************************************************/
package component
import (
"log"
"strconv"
MQTT "github.com/eclipse/paho.mqtt.golang"
"github.com/edgexfoundry/edgex-ui-go/internal/domain"
)
const (
ClientIDPrefix = "edgex-go-"
)
var f MQTT.MessageHandler = func(client MQTT.Client, msg MQTT.Message) {
log.Printf("TOPIC: %s\n", msg.Topic())
WsClientSend(MqttTokenCache, msg.Payload())
}
var MqttTokenCache string
//{token:MqttClient}
var ExportSubscriberCache = make(map[string]interface{}, 10)
func CreateMqttClient(addressable domain.Addressable, token string) {
MqttTokenCache = token
broker := addressable.Protocol + "://" + addressable.Address + ":" + strconv.Itoa(addressable.Port)
opts := MQTT.NewClientOptions().AddBroker(broker)
opts.SetClientID(ClientIDPrefix + addressable.Topic)
opts.SetUsername(addressable.User)
opts.SetPassword(addressable.Password)
opts.OnConnect = func(c MQTT.Client) {
if t := c.Subscribe(addressable.Topic, 0, f); t.Wait() && t.Error() != nil {
panic(t.Error())
}
}
client := MQTT.NewClient(opts)
if t := client.Connect(); t.Wait() && t.Error() != nil {
panic(t.Error())
} else {
log.Println("Connected to mqtt server.")
}
ExportSubscriberCache[token+addressable.Topic] = client
}