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/*
* Copyright (c) 2013 IBM Corp.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Seth Hoenig
* Allan Stockdill-Mander
* Mike Robertson
*/
// This demonstrates how to implement your own Store interface and provide
// it to the go-mqtt client.
package main
import (
"fmt"
"time"
MQTT "github.com/eclipse/paho.mqtt.golang"
"github.com/eclipse/paho.mqtt.golang/packets"
)
// This NoOpStore type implements the go-mqtt/Store interface, which
// allows it to be used by the go-mqtt client library. However, it is
// highly recommended that you do not use this NoOpStore in production,
// because it will NOT provide any sort of guaruntee of message delivery.
type NoOpStore struct {
// Contain nothing
}
func (store *NoOpStore) Open() {
// Do nothing
}
func (store *NoOpStore) Put(string, packets.ControlPacket) {
// Do nothing
}
func (store *NoOpStore) Get(string) packets.ControlPacket {
// Do nothing
return nil
}
func (store *NoOpStore) Del(string) {
// Do nothing
}
func (store *NoOpStore) All() []string {
return nil
}
func (store *NoOpStore) Close() {
// Do Nothing
}
func (store *NoOpStore) Reset() {
// Do Nothing
}
func main() {
myNoOpStore := &NoOpStore{}
opts := MQTT.NewClientOptions()
opts.AddBroker("tcp://iot.eclipse.org:1883")
opts.SetClientID("custom-store")
opts.SetStore(myNoOpStore)
var callback MQTT.MessageHandler = func(client MQTT.Client, msg MQTT.Message) {
fmt.Printf("TOPIC: %s\n", msg.Topic())
fmt.Printf("MSG: %s\n", msg.Payload())
}
c := MQTT.NewClient(opts)
if token := c.Connect(); token.Wait() && token.Error() != nil {
panic(token.Error())
}
c.Subscribe("/go-mqtt/sample", 0, callback)
for i := 0; i < 5; i++ {
text := fmt.Sprintf("this is msg #%d!", i)
token := c.Publish("/go-mqtt/sample", 0, false, text)
token.Wait()
}
for i := 1; i < 5; i++ {
time.Sleep(1 * time.Second)
}
c.Disconnect(250)
}
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