mainflux | Industrial IoT Messaging and Device Management Platform | Networking library
kandi X-RAY | mainflux Summary
kandi X-RAY | mainflux Summary
Mainflux is modern, scalable, secure, open-source, and patent-free IoT cloud platform written in Go. It accepts user and thing (sensor, actuator, application) connections over various network protocols (i.e. HTTP, MQTT, WebSocket, CoAP), thus making a seamless bridge between them. It is used as the IoT middleware for building complex IoT solutions. For more details, check out the official documentation.
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QUESTION
I'm currently trying to setup a minimal EdgeX - Mainflux setup to monitor specific sensor data at our company.
For prototyping I set up 2 Linux Servers
- EdgeX Gateway
- Mainflux Server
The gateway receives readings from hardware devices, and should pass them to the mainflux server for further processing.
For that I was following the examples from the official mainflux docs https://mainflux.readthedocs.io/en/latest/agent/
- Created a user
- Created a 'gateway-thing'
- Created 2 channels (data_channel, control_channel)
- Connected gateway-thing to both channels
- Created bootstrap configuration
ANSWER
Answered 2020-Sep-30 at 15:05It is presumed that you are running both edgex
and agent
on same gateway/PC.
To recieve data from edgex server API endpoints you send mqtt message to the agent
For example:
QUESTION
I am trying to implement reactor core for my work. I am stuck with the retries that we need to perform in case of error. Below is my sample code before adding any error
...ANSWER
Answered 2018-Aug-24 at 14:43All forms of retry
work by re-subscribing to the "retried" source. it works wonders with cold Flux
, but a hot Flux
is less adapted to that.
Here with publish()
conversion, there's no guarantee for late subscribers: as the retry is considered a late subscriber it sees nothing, because the publish
has been disconnected by the original finishing in error.
What you would need is a way to keep the last item (the one that might cause the exception) and replay it for new subscribers (or rather, for retry attempts).
Another issue is that you use create
to acquire a FluxSink
that you store externally, which is not a good approach.
The good news is that both problems can be solved in one go by using a ReplayProcessor
: you correctly get a dedicated sink to manually push data, and in case of error retry
will be able to get the error-triggering value out of the history and make another attempt:
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