Improve doc and debug about greenlets hell

larigira/event.py

@@ -93,6 +93,7 @@ class EventSource(ParentedLet):
 
 
 class Monitor(ParentedLet):
+    '''Manages timegenerators and audiogenerators'''
     def __init__(self, parent_queue, conf):
         ParentedLet.__init__(self, parent_queue)
         self.log = logging.getLogger(self.__class__.__name__)
@@ -100,6 +101,7 @@ class Monitor(ParentedLet):
         self.running = {}
         self.conf = conf
         self.source = EventSource(self.q, uri=conf['DB_URI'])
+        self.source.parent_greenlet = self
 
     def add(self, timespec, audiospec):
         '''
@@ -125,15 +127,21 @@ class Monitor(ParentedLet):
 
         audiogen = gevent.spawn_later(delta.total_seconds(), audiogenerate,
                                       audiospec)
+        audiogen.parent_greenlet = self
+        audiogen.doc = 'Will wait {} seconds, then generate audio "{}"'.format(
+            delta.total_seconds(),
+            audiospec.get('nick', ''))
         self.running[timespec.eid] = {
             'greenlet': audiogen,
             'running_time': datetime.now() + timedelta(
                 seconds=delta.total_seconds()),
             'audiospec': audiospec
         }
-        gevent.spawn_later(delta.total_seconds(),
-                           self.source.reload_id,
-                           timespec.eid)
+        gl = gevent.spawn_later(delta.total_seconds(),
+                                self.source.reload_id,
+                                timespec.eid)
+        gl.parent_greenlet = self
+        gl.doc = 'Will wait, then reload id {}'.format(timespec.eid)
         # FIXME: audiogen is ready in a moment between
         # exact_time - CACHING_TIME and the exact_time
         # atm we are just ignoring this "window", saying that any moment is

larigira/eventutils.py

@@ -12,6 +12,7 @@ class ParentedLet(gevent.Greenlet):
     def __init__(self, queue):
         gevent.Greenlet.__init__(self)
         self.parent_queue = queue
+        self.parent_greenlet = None
         self.tracker = None  # set this to recognize easily
 
     def parent_msg(self, kind, *args):
@@ -54,6 +55,7 @@ class CeleryTask(ParentedLet):
 
 
 class Timer(ParentedLet):
+    '''wait some time, then send a "timer" message to parent'''
     def __init__(self, milliseconds, queue):
         ParentedLet.__init__(self, queue)
         self.ms = milliseconds

larigira/mpc.py

@@ -77,8 +77,12 @@ class Player(gevent.Greenlet):
             mpd_client.addid(song, insert_pos)
 
     def _run(self):
-        MpcWatcher(self.q, self.conf, client=None).start()
-        Timer(int(self.conf['CHECK_SECS']) * 1000, self.q).start()
+        mw = MpcWatcher(self.q, self.conf, client=None)
+        mw.parent_greenlet = self
+        mw.start()
+        t = Timer(int(self.conf['CHECK_SECS']) * 1000, self.q)
+        t.parent_greenlet = self
+        t.start()
         # at the very start, run a check!
         gevent.Greenlet.spawn(self.check_playlist)
         while True:

larigira/rpc.py

@@ -58,11 +58,23 @@ def rpc_wip():
     greenlets = []
     for ob in filter(lambda obj: isinstance(obj, greenlet),
                      gc.get_objects()):
-        greenlets.append({
+        objrepr = {
             'repr': repr(ob),
             'class': ob.__class__.__name__,
-            'parent': repr(ob.parent)
-        })
+        }
+        if hasattr(ob, 'parent_greenlet') and ob.parent_greenlet is not None:
+            objrepr['parent'] = hex(id(ob.parent_greenlet))
+        else:
+            objrepr['parent'] = hex(id(ob.parent)) if ob.parent is not None else None
+        if hasattr(ob, 'doc'):
+            objrepr['doc'] = ob.doc.split('\n')[0]
+        elif ob.__doc__:
+            objrepr['doc'] = ob.__doc__.split('\n')[0]
+
+        greenlets[hex(id(ob))] = objrepr
+
+    # TODO: make it a tree
+
     return jsonify(dict(greenlets=greenlets,
                         audiogens=get_scheduled_audiogen(),
                         ))