Ecosyste.ms: Awesome

An open API service indexing awesome lists of open source software.

Awesome Lists | Featured Topics | Projects

https://github.com/jcksnvllxr80/mqtt_example

mqtt example in go, rust, and python
https://github.com/jcksnvllxr80/mqtt_example

docker go mqtt python rust

Last synced: about 1 month ago
JSON representation

mqtt example in go, rust, and python

Awesome Lists containing this project

README 

        
# MQTT broker with producer/consumer client



MQTT example. 

* The broker is MQTT and runs in a container (using docker-compose).  

* The client application contains a producer and multiple consumers  

  * Permanent (consuming all the time)

  * Delayed (Consumes after the producer has finished plus a short delay)

* The client application sends 5 messages to a topic `/mqtt`  

  * the messages are sent with the retain flag set true (`retain=True`)



NOTE: **mqtt only holds the last message to a given topic so if clients are offline for an extended period, 

they will likely lose messages.**



## python output



```text

Cleared retained messages on topic `python/mqtt`

Connected to MQTT Broker with client ID: client-642!

Stopped network loop after clearing retained messages.

Starting permanent listener...

Starting to publish messages...

Connected to MQTT Broker with client ID: listener-client-31!

Connected to MQTT Broker with client ID: client-642!

Send `message: 1` to topic `python/mqtt`

Permanent Listener Received `message: 1` from `python/mqtt` topic

Send `message: 2` to topic `python/mqtt`

Permanent Listener Received `message: 2` from `python/mqtt` topic

Send `message: 3` to topic `python/mqtt`

Permanent Listener Received `message: 3` from `python/mqtt` topic

Send `message: 4` to topic `python/mqtt`

Permanent Listener Received `message: 4` from `python/mqtt` topic

Send `message: 5` to topic `python/mqtt`

Stopped publishing messages.

Permanent Listener Received `message: 5` from `python/mqtt` topic

Stopped network loop after publishing.

---- Simulating an offline service by sending messages first and then receiving later ----

Waiting 3 seconds before subscribing...

Starting network loop for receiving messages...

Delayed Subscriber Received `message: 5` from `python/mqtt` topic

Stopped network loop after receiving messages.



Process finished with exit code 0

```



## rust output 



```text

Starting the permanent consumer...

Permanent consumer subscribed to `rust/mqtt`

Permanent consumer is ready

Permanent consumer setup completed.

Starting the producer...

Starting to publish messages...

Publishing `message: 1` to topic `rust/mqtt`

Permanent consumer received `message: 1` from `rust/mqtt` topic

Publishing `message: 2` to topic `rust/mqtt`

Permanent consumer received `message: 2` from `rust/mqtt` topic

Publishing `message: 3` to topic `rust/mqtt`

Permanent consumer received `message: 3` from `rust/mqtt` topic

Publishing `message: 4` to topic `rust/mqtt`

Permanent consumer received `message: 4` from `rust/mqtt` topic

Publishing `message: 5` to topic `rust/mqtt`

Permanent consumer received `message: 5` from `rust/mqtt` topic

Stopped publishing messages.

Waiting 3 seconds before starting the delayed consumer...

Delayed consumer subscribed to `rust/mqtt`

Delayed consumer received `message: 5` from `rust/mqtt` topic

```



## go output



```text

Starting the permanent consumer...

permanent-consumer-1192 connected to broker

permanent-consumer-1192 subscribed to `go/mqtt`

Permanent consumer setup completed.

Starting the producer...

producer-9233 connected to broker

Starting to publish messages...

producer-9233 publishing `message: 1` to topic `go/mqtt`

permanent-consumer-1192 received `message: 1` from `go/mqtt` topic

producer-9233 publishing `message: 2` to topic `go/mqtt`

permanent-consumer-1192 received `message: 2` from `go/mqtt` topic

producer-9233 publishing `message: 3` to topic `go/mqtt`

permanent-consumer-1192 received `message: 3` from `go/mqtt` topic

producer-9233 publishing `message: 4` to topic `go/mqtt`

permanent-consumer-1192 received `message: 4` from `go/mqtt` topic

producer-9233 publishing `message: 5` to topic `go/mqtt`

permanent-consumer-1192 received `message: 5` from `go/mqtt` topic

producer-9233 stopped publishing messages.

Waiting 3 seconds before starting the delayed consumer...

delayed-consumer-36 connected to broker

delayed-consumer-36 subscribed to `go/mqtt`

delayed-consumer-36 received `message: 5` from `go/mqtt` topic

```