[Chandler-dev] Problem with stamping and collection notifications/ kind watchers

Tue, 18 Jul 2006 15:16:31 -0700 

Hi all,
I've found something which seems like a bug in the interaction between the notification framework and stamping. 


When new mail messages enter Chandler, I'd like to annotate them and put 
them into a mail directory Item so they will be accessible to the IMAP 
server. Currently, this works perfectly for all the entry cases I've 
tested (the IMAP client, Item>New Item>Message, drag and drop from 
Thunderbird/Mail.app/etc) except stamping. When a message is stamped, a 
repository commit during the callback causes a very nasty error (which 
I've reproduced at the bottom of this page).



A bit more exploration led to the creation of a parcel which illustrates 
this bug. It appears that the problem is indeed caused by the commit 
during an onCollectionNotification or watchKind callback. Removing the 
commit fixes the problem, and the test parcel is sufficiently simple 
that it seems likely the bug is coming from code already in Chandler's 
trunk.


Grant did some exploring and found the following:


So, here's what's seems to be going on:


The self.onCollectionNotification() callback that results from 
notificationQueueSubscribe() is always happening in the main thread. 
When you commit your changes (as you should), that causes a whole 
bunch of stuff to happen, including changes to CPIA blocks in the app. 
That eventually causes CPIA to get into a weird state; probably what's 
happening is the commit in the middle of the refresh exposes some 
dependency on the order of notification processing. 





After discussing this with Grant, Andi, and Bryan, Grant recommended I 
take this to the list.



Does this seem like a bug to people who know more about these 
mechanisms? Should I file a bug report? If yes, is there any 
documentation on the right way to file one?


Thanks very much

-Travis






Traceback (most recent call last):

 File "/Users/travis/dev/chandler/chandler/application/Application.py", 
line 655, in OnCommand

   Block.post (blockEvent, arguments, block)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 183, in post

   self.dispatchEvent (event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 1028, in dispatchEvent

   bubbleUpCallMethod (blockOrWidget, methodName, event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 935, in bubbleUpCallMethod

   blockOrWidget = blockOrWidget.parentBlock

chandlerdb.item.ItemError.StaleItemError: 
<DetailSynchronizedAttributeEditorBlock (stale): 
81890f64-16a7-11db-a954-93550c3bde89>

Traceback (most recent call last):

 File "/Users/travis/dev/chandler/chandler/application/Application.py", 
line 655, in OnCommand

   Block.post (blockEvent, arguments, block)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 183, in post

   self.dispatchEvent (event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 1028, in dispatchEvent

   bubbleUpCallMethod (blockOrWidget, methodName, event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 935, in bubbleUpCallMethod

   blockOrWidget = blockOrWidget.parentBlock

chandlerdb.item.ItemError.StaleItemError: 
<DetailSynchronizedAttributeEditorBlock (stale): 
81890f64-16a7-11db-a954-93550c3bde89>

Traceback (most recent call last):

 File "/Users/travis/dev/chandler/chandler/application/Application.py", 
line 655, in OnCommand

   Block.post (blockEvent, arguments, block)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 183, in post

   self.dispatchEvent (event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 1028, in dispatchEvent

   bubbleUpCallMethod (blockOrWidget, methodName, event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 935, in bubbleUpCallMethod

   blockOrWidget = blockOrWidget.parentBlock

chandlerdb.item.ItemError.StaleItemError: 
<DetailSynchronizedAttributeEditorBlock (stale): 
81890f64-16a7-11db-a954-93550c3bde89>

Traceback (most recent call last):

 File "/Users/travis/dev/chandler/chandler/application/Application.py", 
line 640, in OnCommand

   blockEvent = getattr (block, 'event', None)

chandlerdb.item.ItemError.StaleItemError: <MailMessageButtonBlock 
(stale): 818e89e4-16a7-11db-a954-93550c3bde89>

Traceback (most recent call last):

 File "/Users/travis/dev/chandler/chandler/application/Application.py", 
line 640, in OnCommand

   blockEvent = getattr (block, 'event', None)

chandlerdb.item.ItemError.StaleItemError: <TaskStampBlock (stale): 
818eb662-16a7-11db-a954-93550c3bde89>

Traceback (most recent call last):

 File "/Users/travis/dev/chandler/chandler/application/Application.py", 
line 640, in OnCommand

   blockEvent = getattr (block, 'event', None)

chandlerdb.item.ItemError.StaleItemError: <CalendarStampBlock (stale): 
818ed6d8-16a7-11db-a954-93550c3bde89>

Traceback (most recent call last):

 File "/Users/travis/dev/chandler/chandler/application/Application.py", 
line 640, in OnCommand

   blockEvent = getattr (block, 'event', None)

chandlerdb.item.ItemError.StaleItemError: <PrivateSwitchButtonBlock 
(stale): 818f1102-16a7-11db-a954-93550c3bde89>

Traceback (most recent call last):

 File "/Users/travis/dev/chandler/chandler/application/Application.py", 
line 640, in OnCommand

   blockEvent = getattr (block, 'event', None)

chandlerdb.item.ItemError.StaleItemError: <ReadOnlyIconBlock (stale): 
818f4d20-16a7-11db-a954-93550c3bde89>

Traceback (most recent call last):

 File "/Users/travis/dev/chandler/chandler/application/Application.py", 
line 655, in OnCommand

   Block.post (blockEvent, arguments, block)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 183, in post

   self.dispatchEvent (event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 1028, in dispatchEvent

   bubbleUpCallMethod (blockOrWidget, methodName, event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 935, in bubbleUpCallMethod

   blockOrWidget = blockOrWidget.parentBlock

chandlerdb.item.ItemError.StaleItemError: 
<DetailSynchronizedAttributeEditorBlock (stale): 
81890f64-16a7-11db-a954-93550c3bde89>

Traceback (most recent call last):

 File "/Users/travis/dev/chandler/chandler/application/Application.py", 
line 655, in OnCommand

   Block.post (blockEvent, arguments, block)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 183, in post

   self.dispatchEvent (event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 1028, in dispatchEvent

   bubbleUpCallMethod (blockOrWidget, methodName, event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 935, in bubbleUpCallMethod

   blockOrWidget = blockOrWidget.parentBlock

chandlerdb.item.ItemError.StaleItemError: 
<DetailSynchronizedAttributeEditorBlock (stale): 
81890f64-16a7-11db-a954-93550c3bde89>

Traceback (most recent call last):

 File "/Users/travis/dev/chandler/chandler/application/Application.py", 
line 655, in OnCommand

   Block.post (blockEvent, arguments, block)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 183, in post

   self.dispatchEvent (event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 1028, in dispatchEvent

   bubbleUpCallMethod (blockOrWidget, methodName, event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 935, in bubbleUpCallMethod

   blockOrWidget = blockOrWidget.parentBlock

chandlerdb.item.ItemError.StaleItemError: 
<DetailSynchronizedAttributeEditorBlock (stale): 
81890f64-16a7-11db-a954-93550c3bde89>

Traceback (most recent call last):

 File "/Users/travis/dev/chandler/chandler/application/Application.py", 
line 655, in OnCommand

   Block.post (blockEvent, arguments, block)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 183, in post

   self.dispatchEvent (event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 1028, in dispatchEvent

   bubbleUpCallMethod (blockOrWidget, methodName, event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 935, in bubbleUpCallMethod

   blockOrWidget = blockOrWidget.parentBlock

chandlerdb.item.ItemError.StaleItemError: 
<DetailSynchronizedAttributeEditorBlock (stale): 
81890f64-16a7-11db-a954-93550c3bde89>

Traceback (most recent call last):

 File "/Users/travis/dev/chandler/chandler/application/Application.py", 
line 655, in OnCommand

   Block.post (blockEvent, arguments, block)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 183, in post

   self.dispatchEvent (event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 1028, in dispatchEvent

   bubbleUpCallMethod (blockOrWidget, methodName, event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 935, in bubbleUpCallMethod

   blockOrWidget = blockOrWidget.parentBlock

chandlerdb.item.ItemError.StaleItemError: 
<DetailSynchronizedAttributeEditorBlock (stale): 
81890f64-16a7-11db-a954-93550c3bde89>

Traceback (most recent call last):

 File "/Users/travis/dev/chandler/chandler/application/Application.py", 
line 655, in OnCommand

   Block.post (blockEvent, arguments, block)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 183, in post

   self.dispatchEvent (event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 1028, in dispatchEvent

   bubbleUpCallMethod (blockOrWidget, methodName, event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 935, in bubbleUpCallMethod

   blockOrWidget = blockOrWidget.parentBlock

chandlerdb.item.ItemError.StaleItemError: 
<DetailSynchronizedAttributeEditorBlock (stale): 
81890f64-16a7-11db-a954-93550c3bde89>

Traceback (most recent call last):

 File "/Users/travis/dev/chandler/chandler/application/Application.py", 
line 655, in OnCommand

   Block.post (blockEvent, arguments, block)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 183, in post

   self.dispatchEvent (event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 1028, in dispatchEvent

   bubbleUpCallMethod (blockOrWidget, methodName, event)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 935, in bubbleUpCallMethod

   blockOrWidget = blockOrWidget.parentBlock

chandlerdb.item.ItemError.StaleItemError: 
<DetailSynchronizedAttributeEditorBlock (stale): 
81890f64-16a7-11db-a954-93550c3bde89>

Traceback (most recent call last):

 File "/Users/travis/dev/chandler/chandler/application/Application.py", 
line 199, in OnClose

   Block.finishEdits()

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 704, in finishEdits

   saveValueMethod(onBlock)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/ControlBlocks.py", 
line 1490, in saveValue

   editor.EndControlEdit(self.item, self.attributeName, widget)

 File 
"/Users/travis/dev/chandler/chandler/parcels/osaf/framework/blocks/Block.py", 
line 306, in getProxiedContents

   return getProxiedItem(getattr(self, 'contents', None))

chandlerdb.item.ItemError.StaleItemError: 
<DetailSynchronizedAttributeEditorBlock (stale): 
81890f64-16a7-11db-a954-93550c3bde89>





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