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Viewing changes to glance/image_cache/__init__.py

  • Committer: Package Import Robot
  • Author(s): Chuck Short, Chuck Short, Monty Taylor, Scott Moser, Ben Howard
  • Date: 2011-08-26 10:13:39 UTC
  • mfrom: (1.1.11 upstream)
  • Revision ID: package-import@ubuntu.com-20110826101339-mn8akhehsitvjgld
Tags: 2011.3~d4-0ubuntu1
https://launchpad.net/bugs/816972
https://launchpad.net/bugs/828721
[Chuck Short]
* New upstream release.

[ Monty Taylor ]
* New upstream release.
* Added python-kombu as Depends and Build-depends.

[ Scott Moser ]
* glance.postinst: use a trailing slash when using chown on directories

[ Ben Howard ]
* Install /etc/glance-scrubber.conf by default (LP: #816972)
* Remove glance user and logs on purge (LP: #828721)
* Converted dh to use "--with python2".
* Incremented standards version to 3.9.2; no changes required

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Lines of Context:
glance/image_cache/__init__.py
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        for path in paths:
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            if os.path.exists(path):
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                continue
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            logger.info("image cache directory doesn't exist, creating '%s'",
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                        path)
 
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            logger.info(_("image cache directory doesn't exist, "
 
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                          "creating '%s'"), path)
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            os.makedirs(path)
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    @property
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        else:
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            # NOTE(sirp): `rw` and `a' modes are not supported since image
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            # data is immutable, we `wb` it once, then `rb` multiple times.
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            raise Exception("mode '%s' not supported" % mode)
 
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            raise Exception(_("mode '%s' not supported") % mode)
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    @contextmanager
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    def _open_write(self, image_meta, mode):
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            set_xattr('hits', 0)
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            final_path = self.path_for_image(image_id)
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            logger.debug("fetch finished, commiting by moving "
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                         "'%(incomplete_path)s' to '%(final_path)s'",
 
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            logger.debug(_("fetch finished, commiting by moving "
 
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                         "'%(incomplete_path)s' to '%(final_path)s'"),
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                         dict(incomplete_path=incomplete_path,
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                              final_path=final_path))
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            os.rename(incomplete_path, final_path)
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            set_xattr('error', "%s" % e)
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            invalid_path = self.invalid_path_for_image(image_id)
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            logger.debug("fetch errored, rolling back by moving "
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                         "'%(incomplete_path)s' to '%(invalid_path)s'",
 
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            logger.debug(_("fetch errored, rolling back by moving "
 
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                         "'%(incomplete_path)s' to '%(invalid_path)s'"),
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                         dict(incomplete_path=incomplete_path,
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                              invalid_path=invalid_path))
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            os.rename(incomplete_path, invalid_path)
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    @staticmethod
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    def _delete_file(path):
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        if os.path.exists(path):
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            logger.debug("deleting image cache file '%s'", path)
 
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            logger.debug(_("deleting image cache file '%s'"), path)
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            os.unlink(path)
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        else:
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            logger.warn("image cache file '%s' doesn't exist, unable to"
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                        " delete", path)
 
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            logger.warn(_("image cache file '%s' doesn't exist, unable to"
 
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                        " delete"), path)
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    def purge(self, image_id):
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        path = self.path_for_image(image_id)
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        image_id = image_meta['id']
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        if self.hit(image_id):
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            msg = "Skipping prefetch, image '%s' already cached" % image_id
 
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            msg = _("Skipping prefetch, image '%s' already cached") % image_id
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            logger.warn(msg)
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            raise exception.Invalid(msg)
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        if self.is_image_currently_prefetching(image_id):
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            msg = "Skipping prefetch, already prefetching image '%s'"\
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                  % image_id
 
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            msg = _("Skipping prefetch, already prefetching "
 
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                    "image '%s'") % image_id
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            logger.warn(msg)
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            raise exception.Invalid(msg)
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        if self.is_image_queued_for_prefetch(image_id):
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            msg = "Skipping prefetch, image '%s' already queued for"\
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                  " prefetching" % image_id
 
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            msg = _("Skipping prefetch, image '%s' already queued for"
 
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                    " prefetching") % image_id
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            logger.warn(msg)
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            raise exception.Invalid(msg)
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            mtime = os.path.getmtime(path)
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            age = now - mtime
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            if not grace:
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                logger.debug("No grace period, reaping '%(path)s'"
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                             " immediately", locals())
 
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                logger.debug(_("No grace period, reaping '%(path)s'"
 
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                             " immediately"), locals())
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                self._delete_file(path)
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                reaped += 1
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            elif age > grace:
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                logger.debug("Cache entry '%(path)s' exceeds grace period, "
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                             "(%(age)i s > %(grace)i s)", locals())
 
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                logger.debug(_("Cache entry '%(path)s' exceeds grace period, "
 
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                             "(%(age)i s > %(grace)i s)"), locals())
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                self._delete_file(path)
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                reaped += 1
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        logger.info("Reaped %(reaped)s %(entry_type)s cache entries",
 
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        logger.info(_("Reaped %(reaped)s %(entry_type)s cache entries"),
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                    locals())
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        return reaped
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