What are the possibilities to repeat a sendTelegram if it fails

[tombert (Thomas Perschak)]

Hi,

imagine I put a sendTelegram into my rules file and it fails because there is no internet connection. What are my possibilities to retry sendTelegram for e.g. 10 minutes every minute and only then give up?
(I have lots of sendTelegram statements with various messages in separate rules)

As I understood, rules run single threaded? So if I would block inside a rule the whole rules engine will stuck. Is there a neat way using the “standard” rules engine?

I was also thinking maybe to spawn a separate linux process which sends the messages, so there would be for each new sendTelegram a new process until it succeeds or gives up trying.

thx!

[denominator (James Bowler)]

Have you tested what happens if there is no internet connection? What happens.

In you rules you could check if you have an internet dropout and then write the message to a text file. Then when internet is reconnected send those messages line by line to telegram.

[rossko57]

@tombert

So if I would block inside a rule …

Why would you do that? The rules systems allow you to create timers and schedule a task for a time in the future, like trying again.

[rlkoshak (Rich Koshak)]

Design Pattern: Looping Timers

Please see Design Pattern: What is a Design Pattern and How Do I Use Them to understand the scope and purpose of this and other Design Patterns. Problem Statement Often one may require a loop in a Rule, often with a Thread::sleep to wait for some event to occur or some state to change before continuing the rest of the Rule. However, long running Rules are a bad idea (see Why have my Rules stopped running? Why Thread::sleep is a bad idea). Concept [image] Use a Timer that reschedules itself in…

[tombert (Thomas Perschak)]

I’ll try the looping timers pattern. Thank you very much for pointing me to it!