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mqtt initial

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This commit is contained in:
Mike Bloy 2022-08-19 12:35:43 -05:00
parent 1207b83731
commit aa9de7bd38
4 changed files with 77 additions and 0 deletions
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1
go.mod
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@ -5,6 +5,7 @@ go 1.18
require (
github.com/cortesi/devd v0.0.0-20200427000907-c1a3bfba27d8
github.com/cortesi/modd v0.0.0-20211215124449-6083f9d1c171
github.com/eclipse/paho.mqtt.golang v1.3.5
github.com/mdomke/git-semver/v6 v6.2.0
github.com/rs/zerolog v1.26.1
github.com/spf13/cobra v1.4.0

2
go.sum
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@ -93,6 +93,8 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/dustin/go-humanize v1.0.0 h1:VSnTsYCnlFHaM2/igO1h6X3HA71jcobQuxemgkq4zYo=
github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
github.com/eclipse/paho.mqtt.golang v1.3.5 h1:sWtmgNxYM9P2sP+xEItMozsR3w0cqZFlqnNN1bdl41Y=
github.com/eclipse/paho.mqtt.golang v1.3.5/go.mod h1:eTzb4gxwwyWpqBUHGQZ4ABAV7+Jgm1PklsYT/eo8Hcc=
github.com/emirpasic/gods v1.12.0 h1:QAUIPSaCu4G+POclxeqb3F+WPpdKqFGlw36+yOzGlrg=
github.com/emirpasic/gods v1.12.0/go.mod h1:YfzfFFoVP/catgzJb4IKIqXjX78Ha8FMSDh3ymbK86o=
github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=

47
screen/listener.go Normal file
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@ -0,0 +1,47 @@
package screen
import (
"strings"
mqtt "github.com/eclipse/paho.mqtt.golang"
)
func runListener(cfg configObj) error {
log := cfg.logger.With().
Str("broker", cfg.brokerUrl).
Str("clientid", cfg.clientId).
Logger()
opts := mqtt.NewClientOptions().
AddBroker(cfg.brokerUrl).
SetClientID(cfg.clientId).
SetDefaultPublishHandler(messageHandler)
opts = opts.SetOnConnectHandler(func(client mqtt.Client) {
log.Info().Str("topic", cfg.topic).Msg("Subscribing to topic")
if token := client.Subscribe(cfg.topic, 1, nil); token.Wait() && token.Error() != nil {
log.Error().
Str("topic", cfg.topic).
Err(token.Error()).Msg("Couldn't subscribe to topic")
}
})
log.Info().Msg("Connecting to broker")
client := mqtt.NewClient(opts)
if token := client.Connect(); token.Wait() && token.Error() != nil {
log.Error().Err(token.Error()).Msg("Couldn't connect to broker")
return token.Error()
}
return nil
}
func messageHandler(client mqtt.Client, msg mqtt.Message) {
log := config.logger
topic := msg.Topic()
payload := msg.Payload()
if strings.Compare(string(payload), "\n") > 0 {
log.Info().
Str("topic", topic).
Str("payload", string(payload)).
Msg("MQTT Message")
}
}

27
screen/server.go Normal file
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@ -0,0 +1,27 @@
package screen
import (
"github.com/rs/zerolog"
"github.com/spf13/viper"
)
type configObj struct {
logger zerolog.Logger
brokerUrl string
clientId string
topic string
}
var config = configObj{}
func init() {
viper.SetDefault("mqtt_client_id", "screenlistener")
}
func Run(rootLogger zerolog.Logger, exitch chan bool) {
config.logger = rootLogger.With().Str("name", "screen").Logger()
config.brokerUrl = viper.GetString("mqtt_url")
config.clientId = viper.GetString("mqtt_client_id")
config.topic = viper.GetString("mqtt_topic")
exitch <- true
}