Sure thing. I am writing an OPDS client app and ebook manager. It's designed to query public domain OPDS book catalogs (e.g., http://www.feedbooks.com/catalog) and to help manage an ebook collection. I have, for example, a feature that allows one to rename and reorganize a book collection on disk. It is a long running process with a larger book collection, so I am using the scheduler to run the task. Once the task is completed, I want to display a flash notification in the UI notifying the user that it is complete. Mind you, there are other background tasks as well (some on a regular schedule) that will also be running at times that I also would like to have UI notifications for.
>From my understanding, one can use the database or the file system to communicate the message to the UI. Or one could use websockets. I had thought the easiest way would be to have a small table in a possiibly separate database to store the message. The UI could then occasionally poll the server for new messages, display it as a flash message and delete it from the database. But since I will be using sqlite as the database, I was concerned about concurrency since I would have two different processes possible accessing the database at the same time. So I was looking for some advice on how best to proceed. Thanks Rod On Sunday, October 11, 2015 at 9:50:02 AM UTC-7, Massimo Di Pierro wrote: > > Can you tell us more about the use case? > > On Friday, 9 October 2015 22:51:04 UTC-5, Rod Watkins wrote: >> >> Hi everyone, >> >> I have a question about the scheduler and communicating between the >> scheduler process and my web app. In another post here, Niphlod suggested >> using the database or the file system to communicate between the scheduler >> and my app--for example, to communicate some content to display in a flash >> message. I will be using sqlite as my database. What are the concurrency >> problems I may be facing sharing the message through sqlite? Would using >> the file system be better? Or, should I consider a more sophisticated >> messaging system like that in websocket_messaging in the contrib folder. Or >> is there some other better way? >> >> Thanks >> Rod >> > -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
