If you do the database action in the ui thread -- that is *not* in a worker, it "should" work. However, you should be careful not to do too much work because blocking in window.onunload would slow down page navigation.
If you send a message to a worker in onload and try to do the database work there, I think the behavior is undefined. It might or might not work, and it might also vary across browsers. All that said, it's usually best to avoid relying on window.unload. There is no guarantee that it will get called. For example, it won't in the case of a browser crash. It can be a good idea to use window.onunload as an optimization, but your application should be robust against it never getting called. HTH, - a On Mon, Nov 3, 2008 at 12:14 PM, Travis <[EMAIL PROTECTED]> wrote: > > So that being said, are there any implications with using Gears to > perform a local database action on window.onunload or would the > browser prevent that? > > On Nov 2, 4:04 pm, Chris Prince <[EMAIL PROTECTED]> wrote: >> Yes, workers stop executing when the browser is closed. Workers do >> not have any opportunity to run "last-chance" code. >> >> The reasons for this are: >> * Users generally don't like their actions to be delayed, especially >> when they try to close a program. >> * Even if workers could run some final code: >> (a) it's unclear how many milliseconds longer the workers >> should be allowed to run, and >> (b) no matter how many milliseconds were chosen, worker >> code could not rely on any particular actions completing, >> because the amount of work you can do in N msec will >> vary widely between machines. >> >> >> >> On Fri, Oct 31, 2008 at 4:45 PM, Travis <[EMAIL PROTECTED]> wrote: >> >> > I was wondering if a worker process stops when the browser closes >> > regardless of whether its completed or not? >> >> > I am trying to implement a background process that runs a long running >> > PHP file via the XMLHttpRequest module and I would like to store its >> > return data in the Gears database.- Hide quoted text - >> >> - Show quoted text - >
