2 # Takes a generator and a notification identifier as parameter,
3 # starts a thread, and post a notification whenever data arrives.
4 # Posts a completion notification when done.
5 # Terminates if generator fails or encounters an error.
8 from postoffice import postoffice
14 log = logging.getLogger(__name__)
16 class _Worker(threading.Thread):
17 def __init__(self, generator, owner):
18 threading.Thread.__init__(self)
20 self.generator = generator
23 def _post(self, item):
24 postoffice.notify("fetch", self.owner, item)
27 postoffice.notify("fetch-ok", self.owner)
29 def _post_fail(self, e):
30 postoffice.notify("fetch-fail", self.owner, e)
34 for item in self.generator():
37 except jamaendo.JamendoAPIError, e:
38 log.exception("Failed to fetch, id %s" % (self.owner))
41 class Fetcher(object):
42 def __init__(self, generator, owner, on_item = None, on_ok = None, on_fail = None):
43 self.generator = generator
47 self.on_item = on_item
49 self.on_fail = on_fail
51 def _on_item_cb(self, i, x):
54 def _on_ok_cb(self, i):
56 hildon.hildon_gtk_window_set_progress_indicator(self.owner, 0)
58 def _on_fail_cb(self, i, e):
60 hildon.hildon_gtk_window_set_progress_indicator(self.owner, 0)
63 postoffice.connect('fetch', self, self._on_item_cb)
64 postoffice.connect('fetch-ok', self, self._on_ok_cb)
65 postoffice.connect('fetch-fail', self, self._on_fail_cb)
66 hildon.hildon_gtk_window_set_progress_indicator(self.owner, 1)
67 self.worker = _Worker(self.generator, self.owner)
71 postoffice.disconnect(['fetch', 'fetch-ok', 'fetch-fail'], self)