While looking at many broken repositories over the past couple of months, it
became obvious to me that having a way to trace which view committed which
changes to an item and when would be very helpful in piecing together a
particular bug's reproduction scenario.
I just checked in changes that implement this new debugging feature,
err, bug 7152. There are four new APIs that print out short records about
versions and the views that wrote them:
Repository.printVersions() (with optional version number boundaries)
Repository.printItemVersions(item) (likewise)
RepositoryView.printVersions() (likewise)
RepositoryView.printItemVersions(item) (likewise)
The latter two APIs limit the output to versions written by views of the same
name.
For example, to know where and the masterEvents collection changed:
> RunPython tools/headless.py
>>> m = schema.ns('osaf.pim').masterEvents
>>> view.repository.printItemVersions(m)
1: 21-Oct-06,15:14:58 3597 3597 0x00800542 MainThread
3: 21-Oct-06,15:16:19 957 174 0x00000002 viewpool-2
7: 21-Oct-06,15:18:46 1772 947 0x00000002 viewpool-0
11: 21-Oct-06,15:20:40 2691 1223 0x00000002 viewpool-1
which shows that it was modified when the repo was created and then when the
three collections that came in with 'Restore Settings' got committed.
The table's columns are:
- version number
- timestamp of commit
- size of view at commit (number of items currently loaded in that view)
- size of commit (number of items being committed)
- status bits of item which are defined at the bottom of this file:
http://svn.osafoundation.org/chandler/trunk/internal/chandlerdb/chandlerdb/item/item.h
- name of the view that did the commit
Another example shows that just re-starting Chandler causes 1924 items to get
loaded before the startup commit of the UI. Look at the size of the view for
version 24:
1: 21-Oct-06,15:14:58 3597 3597 MainThread
2: 21-Oct-06,15:15:06 3597 3 MainThread
3: 21-Oct-06,15:16:19 957 174 viewpool-2
4: 21-Oct-06,15:16:19 957 2 viewpool-2
5: 21-Oct-06,15:16:20 964 2 viewpool-2
6: 21-Oct-06,15:16:20 3671 5 MainThread
7: 21-Oct-06,15:18:46 1772 947 viewpool-0
8: 21-Oct-06,15:18:52 1772 2 viewpool-0
9: 21-Oct-06,15:18:53 1779 2 viewpool-0
10: 21-Oct-06,15:18:55 4231 257 MainThread
11: 21-Oct-06,15:20:40 2691 1223 viewpool-1
12: 21-Oct-06,15:20:45 2691 2 viewpool-1
13: 21-Oct-06,15:20:46 2698 2 viewpool-1
14: 21-Oct-06,15:20:46 4945 221 MainThread
15: 21-Oct-06,15:21:40 4946 2 MainThread
16: 21-Oct-06,17:29:33 1542 193 MainThread
17: 21-Oct-06,17:29:39 1720 3 MainThread
18: 21-Oct-06,19:54:52 1544 193 MainThread
19: 21-Oct-06,19:55:43 2823 418 MainThread
20: 21-Oct-06,19:55:46 2869 301 MainThread
21: 21-Oct-06,19:56:00 2882 45 MainThread
22: 21-Oct-06,19:56:01 2882 250 MainThread
23: 23-Oct-06,14:57:13 1640 193 MainThread
24: 23-Oct-06,14:57:33 1924 11 MainThread
Andi..
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