POS: Longpolling support
by IT-Projects LLC https://github.com/itpp-labs/pos-addons , Dinar Gabbasov https://github.com/itpp-labs/pos-addons| Required Apps |
•
Point of Sale (point_of_sale)
• Inventory (stock) • Invoicing (account) |
| Lines of code | 696 |
| Technical Name |
pos_longpolling |
| Website | https://github.com/itpp-labs/pos-addons |
| Also available in version | v 8.0 v 9.0 v 10.0 v 11.0 v 12.0 v 13.0 |
POS: Longpolling support
Technical module to implement instant updates in POS
Debugging
If you need to see longpolling requests at browser's Network tool, be sure that you don't have other opened tab to the same address. Otherwise, odoo smartly sends longpolling requests via one of existing tabs only and pass result via localStorage.
Questions?
To get an assistance on this module contact us by email :arrow_right: help@itpp.dev
Contributors
- Dinar Gabbasov
- Alexandr Kolushov
- Eugene Molotov
Sponsors
- EST-POS OÜ
Odoo Apps Store: https://apps.odoo.com/apps/modules/14.0/pos_longpolling/
Tested on Odoo 14.0
POS: Longpolling support
Longpolling
Check following resources about activating longpolling:
- Official doc: https://www.odoo.com/documentation/13.0/setup/deploy.html#builtin-server
- Non-official doc: https://odoo-development.readthedocs.io/en/latest/admin/longpolling.html
In short, you need to start server with non-zero workers parameter::
openerp-server --workers=2 ...
and configure nginx:
location /longpolling {
proxy_pass http://127.0.0.1:8072;
}
location / {
proxy_pass http://127.0.0.1:8069;
}
PgBouncer
If you use PgBouncer or something similar, be sure that LISTEN/NOTIFY features are supported. For PgBouncer it means that you have to use Session pooling
Database connections limit
It's highly recommended to check odoo and postgresql settings about connections limits. In short, it must satisfy following condition:
(1 + workers + max_cron_threads) * db_maxconn < max_connections
Where max_connections is postgresql setting and the rest are from odoo.
Usage
Status Icons
Longpolling Icon:
- Red - There is no connection to the server. Offline mode
- Orange - There is a connection to the server, but we haven't received a response from polling yet
- Green - Online
- Rotating - Connection is updating
To manually reestablish connection or to check its presence click on the longpolling icon.
Wi-Fi Icon:
Shows the correctness of the order sending to the server
- Red - There are some unsent paid orders.
- Green - All paid orders were sent.
Wi-Fi sign can be reestablished only manually, or after the one another order is paid. If it is red make sure that the internet connection is on and click on the icon to send orders before turning off the device in order to prevent data loss. If internet connection is present but orders are not sending, it could mean that the error has occurred.
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