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Adding slightly clearer docs to MountStorage.

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This commit is contained in:
Christopher Allan Webber 2011-08-11 11:29:14 -05:00
parent f64e525090
commit f016fc6505
1 changed files with 22 additions and 9 deletions
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mediagoblin/storage.py
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@ -290,16 +290,29 @@ class MountStorage(StorageInterface):
""" """
Experimental "Mount" virtual Storage Interface Experimental "Mount" virtual Storage Interface
This isn't an interface to some real storage, instead This isn't an interface to some real storage, instead it's a
it's a redirecting interface, that redirects requests redirecting interface, that redirects requests to other
to other "StorageInterface"s. "StorageInterface"s.
For example, requests for ["store1", "a"] to first
storage with the path ["a"], etc. For example, say you have the paths:
1. ['user_data', 'cwebber', 'avatar.jpg']
2. ['user_data', 'elrond', 'avatar.jpg']
3. ['media_entries', '34352f304c3f4d0ad8ad0f043522b6f2', 'thumb.jpg']
You could mount media_entries under CloudFileStorage and user_data
under BasicFileStorage. Then 1 would be passed to
BasicFileStorage under the path ['cwebber', 'avatar.jpg'] and 3
would be passed to CloudFileStorage under
['34352f304c3f4d0ad8ad0f043522b6f2', 'thumb.jpg'].
In other words, this is kind of like mounting /home/ and /etc/
under different filesystems on your operating system... but with
mediagoblin filestorages :)
To set this up, you currently need to call the mount() To set this up, you currently need to call the mount() method with
method with the target path and a backend, that shall the target path and a backend, that shall be available under that
be available under that target path. target path. You have to mount things in a sensible order,
You have to mount things in a sensible order,
especially you can't mount ["a", "b"] before ["a"]. especially you can't mount ["a", "b"] before ["a"].
""" """
def __init__(self, **kwargs): def __init__(self, **kwargs):