lp:~barry/ubuntu-system-image/lp1277589-udm

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Merged into lp:~registry/ubuntu-system-image/client at revision 234

Registry Administrators: Pending requested 2014-02-18

Diff: 540 lines (+203/-16)

11 files modified

NEWS.rst (+3/-0)
systemimage/api.py (+4/-0)
systemimage/dbus.py (+35/-3)
systemimage/download.py (+35/-1)
systemimage/service.py (+2/-1)
systemimage/testing/controller.py (+6/-2)
systemimage/testing/helpers.py (+8/-5)
systemimage/testing/nose.py (+10/-1)
systemimage/tests/data/config_03.ini (+1/-1)
systemimage/tests/data/index_24.json (+36/-0)
systemimage/tests/test_dbus.py (+63/-2)

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Bug #1277589: Better protection against concurrent access

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237. By Barry Warsaw on 2014-02-18

* Flesh out the last new test.
* Log signals.

236. By Barry Warsaw on 2014-02-18

* Default release_checking to None for the manual download case.
* Allow nose tests to provide -L option to specify an explicit log file
  destination path. This greatly improves debugging.

235. By Barry Warsaw on 2014-02-18

* Add a useful repr to the Mediator class so that you can tell in the logs
  when a new mediator or state machine is created.
* Add some useful debugging to the DBus service.
* Fiddle with the checking lock release so that it's actually released at the
  right time (hopefully).

234. By Barry Warsaw on 2014-02-14

  * Request ubuntu-download-manager to download all files to temporary
    destinations, then atomically rename them into place. This avoids
    clobbering by multiple processes and mimic changes coming in u-d-m.

233. By Barry Warsaw on 2014-02-14

  * Return the empty string from `ApplyUpdate()` D-Bus method. This restores
    the original API (patch merged from Ubuntu package, given by Didier
    Roche). (LP: #1260768)

232. By Barry Warsaw on 2014-02-14

 * Better protection against several possible race conditions during
   `CheckForUpdate()` (LP: #1277589)
   - Use a threading.Lock instance as the internal "checking for update"
     barrier instead of a boolean. This should eliminate the race window
     between testing and acquiring the checking lock.
   - Put an exclusive claim on the `com.canonical.SystemImage` system dbus
     name, and if we cannot get that claim, exit with an error code 2. This
     prevents multiple instances of the D-Bus system service from running at
     the same time.

231. By Barry Warsaw on 2014-02-13

Merge branch:

* Internal improvements to SignatureError for better debugging. (LP: #1279056)

230. By Barry Warsaw on 2014-02-13

Bump copyright years.

229. By Barry Warsaw on 2014-01-30

 * MANIFEST.in: Make sure the .bzr directory doesn't end up in the
   sdist tarball.

228. By Barry Warsaw on 2014-01-30

 * No change release to test the new landing process.