I'm working hard to port/rewrite my couchdb code for the recent
version of qooxdoo.
It will be a bit more trimmed down version; less cruft sort of a speak.
The only 'extra thing' remaining is a reactive event system. However
even this thing is simplified heavily.
Perhaps the qooxdoo devs are interested in why i still don't think the
current event system is sufficient.
I want to do:
ev = myDatabase.putDoc('x');
ev.when('done', function(){ alert('document put ont he database'); });
The defautl event system requires me to do:
ev = myDatabase.putDoc('x');
ev.addListener('done', function(){ alert('document put ont he database'); });
ev.send();
Notice the send at the end. In this example it seems too simple and
not very important, but it can become a design issue, since a lot of
code returns the 'ev' at the end. Perhaps the user of the library
wants to catch other events. But if the user needs to 'send', (because
otherwise the events would be missed), then the request looses its
sequence.
My new couchdb support code, has a server class and a request class.
The server class makes sure requests (by default) wait for the last
one to finish; the request class sends the request immediately, but it
stores the resulting reply and status-codes. When 'reacting' to those
status-codes, it will either react immediately, because the request
has already finished, or setup an normal event handler.
Technically, it's just a dataflow cell. The request is something that
_becomes_ a value.
I would love to see qooxdoo support something like that natively in the future.
There are much more places where this would be very usefull. For
example, with modal dialogs:
ev = Dialog.confirm('Do you really want to quit?');
ev.when('yes', function(){ .. })
Rather than the:
// creating dialog
ev = Dialog.confirm('Do you really want to quit?');
// setup up event handlers
...
// showing the dialog (if you show before setting up the handlers
you might get race conditions)
...
Greetings,
Ralf
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