Thanks Massimo, I forgot to mention I'm using the integrated rocket web server (not mod_python, cgi or whatever). So I was just curious if there was a way of sharing data between the hard "cron" thread and the thread where the requests are run, without needing to serialize informate (picke- unpickle or anything). I also thought of using a socket, instead of named pipes.
Basically, I want to avoid database writing because the application is run from a SD card, to avoid wearing. However, if there exists not a way for sharing class instances or plain variables between cron and request threads, I'm going to take a look at using a database from RAM or from a tmpfs. I was thinking of using ":memory:" in-memory sqlite database, but I would hit the same problem: I can't share the "db_in_memory" from the cron thread to the request thread. Thanks very much. On 21 sep, 22:28, mdipierro <[email protected]> wrote: > If not and you have a single web2py installation you can use a named > pipe > > http://stackoverflow.com/questions/1430446/create-a-temporary-fifo-na... > > has pros and cons. data can be lost or corrupted if the reading/ > writing app crashes. > I would use the database because of transcaction safety. > > Massimo > > On Sep 21, 3:21 pm, Álvaro J. Iradier <[email protected]> wrote: > > > > > Hi, > > > I've setup a background worker thread using cron @reboot. The > > background worker is polling some serial sensors all the time (there's > > a loop in class reading the sensor values). On some moment, the values > > are recorded and an alarm bit is set. > > > Now, what I need is a way to share this information with a web request > > without writing it to the database. I've tried so far using class > > variables, and cache.ram, but none of them work. I think the request > > is being processed in a clean environment, am I right? > > > So, what would be a good way of passingsome information to the request > > thread from the background worker class? > > > Thanks very much. > > > Álvaro Iradier.
