With the recent fix of the junit report related issues, another issue arose:
the 'with log.Origin' was changed to disallow __enter__ing an object twice to
fix problems, now still code would fail because it tries to do 'with' on the
same object twice. The only reason is to ensure that logging is associated with
a given object. Instead of complicating even more, implement differently.
Refactor logging to simplify use: drop the 'with Origin' style completely, and
instead use the python stack to determine which objects are created by which,
and which object to associate a log statement with.
The new way: we rely on the convention that each class instance has a local
'self' referencing the object instance. If we need to find an origin as a new
object's parent, or to associate a log message with, we traverse each stack
frame, fetching the first local 'self' object that is a log.Origin class
instance.
How to use:
Simply call log.log() anywhere, and it finds an Origin object to log for, from
the stack. Alternatively call self.log() for any Origin() object to skip the
lookup.
Create classes as child class of log.Origin and make sure to call
super().__init__(category, name). This constructor will magically find a parent
Origin on the stack.
When an exception happens, we first escalate the exception up through call
scopes to where ever it is handled by log.log_exn(). This then finds an Origin
object in the traceback's stack frames, no need to nest in 'with' scopes.
Hence the 'with log.Origin' now "happens implicitly", we can write pure natural
python code, no more hassles with scope ordering.
Furthermore, any frame can place additional logging information in a frame by
calling log.ctx(). This is automatically inserted in the ancestry associated
with a log statement / exception.
Change-Id: I5f9b53150f2bb6fa9d63ce27f0806f0ca6a45e90
The "Affero" nature makes sense for the Osmocom network components like
BSC, SGSN, etc. as they are typically operated to provide a network
service.
For testing, this doesn't make so much sense as it is difficult to
imagine people creating a business out of offering to run test cases on
an end-to-end Osmocom GSM network. So let's drop the 'Affero' here.
All code is so far developed by sysmocom staff, so as Managing Director
of sysmocom I can effect such a license change unilaterally.
Change-Id: I8959c2d605854ffdc21cb29c0fe0e715685c4c05
Composing the filter in gen_filter() is more complex than we need. We pass the
address and potentially further filter elements separately, and then
gen_filter() has to guess how to combine these. Instead, have just a filter
string to use right from the start, so that the caller has full control (and
full responsibility).
Remove the addr argument, which was only used for filtering.
This is my conclusion of looking at the patches with change Ids
I62a6ae7bd3a84baceb684c26727d2269c86ed023 (PS 1) and
Icbb0f8d2058fa7ebb7f0f731645f9266cacdb120
I62... PS 2 will add the SSH filtering.
The name 'filter' is a python built-in, which is why I chose the argument
name 'filters' instead. It works with 'filter' as well, but let's try to
avoid naming conflicts like that.
Change-Id: Iff7ddf51d3bf0189ce07b488a3dcdcfce6907aba
Neels Hofmeyr
Harald Welte
Pau Espin