use wrap_exception in controller, fix clear on kernel

IPython/zmq/parallel/controller.py

@@ -452,7 +452,7 b' class Controller(object):'
     
     def save_task_result(self, idents, msg):
         """save the result of a completed task."""
-        client_id, engine_uuid = idents[:2]
+        client_id = idents[0]
         try:
             msg = self.session.unpack_message(msg, content=False)
         except:
@@ -461,17 +461,22 b' class Controller(object):'
             return
         
         parent = msg['parent_header']
-        eid = self.by_ident[engine_uuid]
         if not parent:
             # print msg
-            # logger.warn("")
+            logger.warn("Task %r had no parent!"%msg)
             return
         msg_id = parent['msg_id']
         self.results[msg_id] = msg
-        if msg_id in self.pending and msg_id in self.tasks[eid]:
+        
+        header = msg['header']
+        engine_uuid = header.get('engine', None)
+        eid = self.by_ident.get(engine_uuid, None)
+        
+        if msg_id in self.pending:
             self.pending.pop(msg_id)
             if msg_id in self.mia:
                 self.mia.remove(msg_id)
+            if eid is not None and msg_id in self.tasks[eid]:
             self.completed[eid].append(msg_id)
             self.tasks[eid].remove(msg_id)
         else:
@@ -539,16 +544,28 b' class Controller(object):'
         content.update(self.engine_addrs)
         # check if requesting available IDs:
         if queue in self.by_ident:
-            content = {'status': 'error', 'reason': "queue_id %r in use"%queue}
+            try:
+                raise KeyError("queue_id %r in use"%queue)
+            except:
+                content = wrap_exception()
         elif heart in self.hearts: # need to check unique hearts?
-            content = {'status': 'error', 'reason': "heart_id %r in use"%heart}
+            try:
+                raise KeyError("heart_id %r in use"%heart)
+            except:
+                content = wrap_exception()
         else:
             for h, pack in self.incoming_registrations.iteritems():
                 if heart == h:
-                    content = {'status': 'error', 'reason': "heart_id %r in use"%heart}
+                    try:
+                        raise KeyError("heart_id %r in use"%heart)
+                    except:
+                        content = wrap_exception()
                     break
                 elif queue == pack[1]:
-                    content = {'status': 'error', 'reason': "queue_id %r in use"%queue}
+                    try:
+                        raise KeyError("queue_id %r in use"%queue)
+                    except:
+                        content = wrap_exception()
                     break
         
         msg = self.session.send(self.registrar, "registration_reply", 
@@ -566,7 +583,7 b' class Controller(object):'
                 dc.start()
                 self.incoming_registrations[heart] = (eid,queue,reg,dc)
         else:
-            logger.error("registration::registration %i failed: %s"%(eid, content['reason']))
+            logger.error("registration::registration %i failed: %s"%(eid, content['evalue']))
         return eid
     
     def unregister_engine(self, ident, msg):
@@ -688,14 +705,23 b' class Controller(object):'
                     self.results.pop(msg_id)
                 else:
                     if msg_id in self.pending:
-                        reply = dict(status='error', reason="msg pending: %r"%msg_id)
+                        try:
+                            raise IndexError("msg pending: %r"%msg_id)
+                        except:
+                            reply = wrap_exception()
                     else:
-                        reply = dict(status='error', reason="No such msg: %r"%msg_id)
+                        try:
+                            raise IndexError("No such msg: %r"%msg_id)
+                        except:
+                            reply = wrap_exception()
                     break
             eids = content.get('engine_ids', [])
             for eid in eids:
                 if eid not in self.engines:
-                    reply = dict(status='error', reason="No such engine: %i"%eid)
+                    try:
+                        raise IndexError("No such engine: %i"%eid)
+                    except:
+                        reply = wrap_exception()
                     break
                 msg_ids = self.completed.pop(eid)
                 for msg_id in msg_ids:
@@ -725,8 +751,10 b' class Controller(object):'
                 if not statusonly:
                     content[msg_id] = self.results[msg_id]['content']
             else:
-                content = dict(status='error')
-                content['reason'] = 'no such message: '+msg_id
+                try:
+                    raise KeyError('No such message: '+msg_id)
+                except:
+                    content = wrap_exception()
                 break
         self.session.send(self.clientele, "result_reply", content=content, 
                                             parent=msg, ident=client_id)

IPython/zmq/parallel/streamkernel.py

@@ -143,6 +143,7 b' class Kernel(object):'
         self.control_stream = control_stream
         # self.control_socket = control_stream.socket
         self.reply_stream = reply_stream
+        self.identity = self.reply_stream.getsockopt(zmq.IDENTITY)
         self.task_stream = task_stream
         self.pub_stream = pub_stream
         self.client = client
@@ -158,7 +159,7 b' class Kernel(object):'
         for msg_type in ['execute_request', 'complete_request', 'apply_request']:
             self.queue_handlers[msg_type] = getattr(self, msg_type)
         
-        for msg_type in ['kill_request', 'abort_request']+self.queue_handlers.keys():
+        for msg_type in ['kill_request', 'abort_request', 'clear_request']+self.queue_handlers.keys():
             self.control_handlers[msg_type] = getattr(self, msg_type)
 
     #-------------------- control handlers -----------------------------
@@ -214,7 +215,7 b' class Kernel(object):'
         print(Message(reply_msg), file=sys.__stdout__)
     
     def kill_request(self, stream, idents, parent):
-        """kill ourselves.  This should really be handled in an external process"""
+        """kill ourself.  This should really be handled in an external process"""
         self.abort_queues()
         msg = self.session.send(stream, 'kill_reply', ident=idents, parent=parent, 
                 content = dict(status='ok'))
@@ -225,6 +226,12 b' class Kernel(object):'
         time.sleep(1)
         os.kill(os.getpid(), SIGKILL)
     
+    def clear_request(self, stream, idents, parent):
+        """Clear our namespace."""
+        self.user_ns = {}
+        msg = self.session.send(stream, 'clear_reply', ident=idents, parent=parent, 
+                content = dict(status='ok'))
+    
     def dispatch_control(self, msg):
         idents,msg = self.session.feed_identities(msg, copy=False)
         msg = self.session.unpack_message(msg, content=True, copy=False)
@@ -330,7 +337,7 b' class Kernel(object):'
         # pyin_msg = self.session.msg(u'pyin',{u'code':code}, parent=parent)
         # self.pub_stream.send(pyin_msg)
         # self.session.send(self.pub_stream, u'pyin', {u'code':code},parent=parent)
-        sub = {'dependencies_met' : True}
+        sub = {'dependencies_met' : True, 'engine' : self.identity}
         try:
             # allow for not overriding displayhook
             if hasattr(sys.displayhook, 'set_parent'):
@@ -382,7 +389,7 b' class Kernel(object):'
             result_buf = []
             
             if etype is UnmetDependency:
-                sub = {'dependencies_met' : False}
+                sub['dependencies_met'] = False
         else:
             reply_content = {'status' : 'ok'}
         # reply_msg = self.session.msg(u'execute_reply', reply_content, parent)