Re: Stop executing certain py files or delay in loading python files until Django server is up and runnning

What you are looking for is readiness check. Basically readiness is a concept wherein something reports to be ready to handle requests (this something could be a web server, a docker container, a kubernetes pod, a database, etc.)

You can custom define an API endpoint that returns 200 OK when your Django server is ready to handle the requests, and internally make a request to that API endpoint and only execute your file once the endpoint returns 200 OK.

Alternatively, there are third-party packages (a quick google search revealed django-probes) that might assist you in implementing something similar.

Logically, at a primitive level, your flow would be something along the lines of:

• Define an API endpoint:
• This should return a custom response WHILE it is YET to be ready to start taking requests
• This should return a different custom response WHEN it is ready to start taking requests
• Once you have the desired "ready" response, you go on invoking the file, until then you keep delaying it by adding a second's sleep or something.

Sample code

1. import requests
2.  
3. """
4. api_endpoint is the custom endpoint that returns your desired
5. response based on whether or not Django Server is ready to take
6. on requests
7. """
8. response = requests.get(api_endpoint)
9.  
10. while response.status_code != 200:
11.     time.sleep(1) # Sleep for 1 second
12.     response = requests.get(api_endpoint)
13.  
14. # Once this while loop breaks, this indicates we are good to proceed
15.  
16. if response.status_code == 200:
17.     # Do rest of your job here

Pastebin link to above: https://pastebin.com/G3G41Xmb

--
Regards

Deep L Sukhwani

ᐧ

On Mon, 30 Sep 2019 at 16:12, Sampath Reddy <sampath.nandyala@gmail.com> wrote:

Hey All,

Using DRF for developing backend api end points for the application, I want to run a python module, only when we are sure Django server is up and running As I am calling the api end in that module.

So need to be sure Django server is up and running, before I can call the same server API end point.

Precisely What I am looking for is, how django loads files and starts executing them when I run "python manage.py runserver 0.0.0.0:8084" from command line. I want to delay some files execution if possible.

Any leads are much appreciated.

Thanks,

Sampath

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