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mpd: Faster playlist listing

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This commit is contained in:
Stein Magnus Jodal 2015-08-06 01:00:00 +02:00
parent 2faf6689c1
commit c8d31e94b7
4 changed files with 51 additions and 28 deletions
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8
docs/changelog.rst
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@ -119,6 +119,14 @@ MPD frontend
- Implement protocol extensions to output Album URIs and Album Images when
outputting track data to clients. (PR: :issue:`1230`)
- The MPD commands ``lsinfo`` and ``listplaylists`` are now implemented using
the :meth:`~mopidy.core.PlaylistsProvider.as_list` method, which retrieves a
lot less data and is thus much faster than the deprecated
:meth:`~mopidy.core.PlaylistsProvider.get_playlists`. The drawback is that
the ``Last-Modified`` timestamp is not available through this method, and the
timestamps in the MPD command responses are now always set to the current
time.
Stream backend
--------------

16
mopidy/mpd/protocol/stored_playlists.py
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@ -75,29 +75,29 @@ def listplaylists(context):
- ncmpcpp 0.5.10 segfaults if we return 'playlist: ' on a line, so we must
ignore playlists without names, which isn't very useful anyway.
"""
last_modified = _get_last_modified()
result = []
for playlist in context.core.playlists.get_playlists().get():
if not playlist.name:
for playlist_ref in context.core.playlists.as_list().get():
if not playlist_ref.name:
continue
name = context.lookup_playlist_name_from_uri(playlist.uri)
name = context.lookup_playlist_name_from_uri(playlist_ref.uri)
result.append(('playlist', name))
result.append(('Last-Modified', _get_last_modified(playlist)))
result.append(('Last-Modified', last_modified))
return result
# TODO: move to translators?
def _get_last_modified(playlist):
def _get_last_modified(last_modified=None):
"""Formats last modified timestamp of a playlist for MPD.
Time in UTC with second precision, formatted in the ISO 8601 format, with
the "Z" time zone marker for UTC. For example, "1970-01-01T00:00:00Z".
"""
if playlist.last_modified is None:
if last_modified is None:
# If unknown, assume the playlist is modified
dt = datetime.datetime.utcnow()
else:
dt = datetime.datetime.utcfromtimestamp(
playlist.last_modified / 1000.0)
dt = datetime.datetime.utcfromtimestamp(last_modified / 1000.0)
dt = dt.replace(microsecond=0)
return '%sZ' % dt.isoformat()

43
tests/mpd/protocol/test_music_db.py
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@ -2,8 +2,10 @@ from __future__ import absolute_import, unicode_literals
import unittest
import mock
from mopidy.models import Album, Artist, Playlist, Ref, SearchResult, Track
from mopidy.mpd.protocol import music_db
from mopidy.mpd.protocol import music_db, stored_playlists
from tests.mpd import protocol
@ -299,33 +301,37 @@ class MusicDatabaseHandlerTest(protocol.BaseTestCase):
self.send_request('listfiles')
self.assertEqualResponse('ACK [0@0] {listfiles} Not implemented')
def test_lsinfo_without_path_returns_same_as_for_root(self):
last_modified = 1390942873222
@mock.patch.object(stored_playlists, '_get_last_modified')
def test_lsinfo_without_path_returns_same_as_for_root(
self, last_modified_mock):
last_modified_mock.return_value = '2015-08-05T22:51:06Z'
self.backend.playlists.set_dummy_playlists([
Playlist(name='a', uri='dummy:/a', last_modified=last_modified)])
Playlist(name='a', uri='dummy:/a')])
response1 = self.send_request('lsinfo')
response2 = self.send_request('lsinfo "/"')
self.assertEqual(response1, response2)
def test_lsinfo_with_empty_path_returns_same_as_for_root(self):
last_modified = 1390942873222
@mock.patch.object(stored_playlists, '_get_last_modified')
def test_lsinfo_with_empty_path_returns_same_as_for_root(
self, last_modified_mock):
last_modified_mock.return_value = '2015-08-05T22:51:06Z'
self.backend.playlists.set_dummy_playlists([
Playlist(name='a', uri='dummy:/a', last_modified=last_modified)])
Playlist(name='a', uri='dummy:/a')])
response1 = self.send_request('lsinfo ""')
response2 = self.send_request('lsinfo "/"')
self.assertEqual(response1, response2)
def test_lsinfo_for_root_includes_playlists(self):
last_modified = 1390942873222
@mock.patch.object(stored_playlists, '_get_last_modified')
def test_lsinfo_for_root_includes_playlists(self, last_modified_mock):
last_modified_mock.return_value = '2015-08-05T22:51:06Z'
self.backend.playlists.set_dummy_playlists([
Playlist(name='a', uri='dummy:/a', last_modified=last_modified)])
Playlist(name='a', uri='dummy:/a')])
self.send_request('lsinfo "/"')
self.assertInResponse('playlist: a')
# Date without milliseconds and with time zone information
self.assertInResponse('Last-Modified: 2014-01-28T21:01:13Z')
self.assertInResponse('Last-Modified: 2015-08-05T22:51:06Z')
self.assertInResponse('OK')
def test_lsinfo_for_root_includes_dirs_for_each_lib_with_content(self):
@ -337,7 +343,10 @@ class MusicDatabaseHandlerTest(protocol.BaseTestCase):
self.assertInResponse('directory: dummy')
self.assertInResponse('OK')
def test_lsinfo_for_dir_with_and_without_leading_slash_is_the_same(self):
@mock.patch.object(stored_playlists, '_get_last_modified')
def test_lsinfo_for_dir_with_and_without_leading_slash_is_the_same(
self, last_modified_mock):
last_modified_mock.return_value = '2015-08-05T22:51:06Z'
self.backend.library.dummy_browse_result = {
'dummy:/': [Ref.track(uri='dummy:/a', name='a'),
Ref.directory(uri='dummy:/foo', name='foo')]}
@ -346,7 +355,10 @@ class MusicDatabaseHandlerTest(protocol.BaseTestCase):
response2 = self.send_request('lsinfo "/dummy"')
self.assertEqual(response1, response2)
def test_lsinfo_for_dir_with_and_without_trailing_slash_is_the_same(self):
@mock.patch.object(stored_playlists, '_get_last_modified')
def test_lsinfo_for_dir_with_and_without_trailing_slash_is_the_same(
self, last_modified_mock):
last_modified_mock.return_value = '2015-08-05T22:51:06Z'
self.backend.library.dummy_browse_result = {
'dummy:/': [Ref.track(uri='dummy:/a', name='a'),
Ref.directory(uri='dummy:/foo', name='foo')]}
@ -404,12 +416,11 @@ class MusicDatabaseHandlerTest(protocol.BaseTestCase):
self.assertInResponse('OK')
def test_lsinfo_for_root_returns_browse_result_before_playlists(self):
last_modified = 1390942873222
self.backend.library.dummy_browse_result = {
'dummy:/': [Ref.track(uri='dummy:/a', name='a'),
Ref.directory(uri='dummy:/foo', name='foo')]}
self.backend.playlists.set_dummy_playlists([
Playlist(name='a', uri='dummy:/a', last_modified=last_modified)])
Playlist(name='a', uri='dummy:/a')])
response = self.send_request('lsinfo "/"')
self.assertLess(response.index('directory: dummy'),

12
tests/mpd/protocol/test_stored_playlists.py
View File

@ -1,6 +1,9 @@
from __future__ import absolute_import, unicode_literals
import mock
from mopidy.models import Playlist, Track
from mopidy.mpd.protocol import stored_playlists
from tests.mpd import protocol
@ -76,15 +79,16 @@ class PlaylistsHandlerTest(protocol.BaseTestCase):
self.assertNotInResponse('Pos: 0')
self.assertInResponse('OK')
def test_listplaylists(self):
last_modified = 1390942873222
@mock.patch.object(stored_playlists, '_get_last_modified')
def test_listplaylists(self, last_modified_mock):
last_modified_mock.return_value = '2015-08-05T22:51:06Z'
self.backend.playlists.set_dummy_playlists([
Playlist(name='a', uri='dummy:a', last_modified=last_modified)])
Playlist(name='a', uri='dummy:a')])
self.send_request('listplaylists')
self.assertInResponse('playlist: a')
# Date without milliseconds and with time zone information
self.assertInResponse('Last-Modified: 2014-01-28T21:01:13Z')
self.assertInResponse('Last-Modified: 2015-08-05T22:51:06Z')
self.assertInResponse('OK')
def test_listplaylists_duplicate(self):