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1 | # GNU MediaGoblin -- federated, autonomous media hosting |
2 | # Copyright (C) 2011, 2012 MediaGoblin contributors. See AUTHORS. | |
3 | # | |
4 | # This program is free software: you can redistribute it and/or modify | |
5 | # it under the terms of the GNU Affero General Public License as published by | |
6 | # the Free Software Foundation, either version 3 of the License, or | |
7 | # (at your option) any later version. | |
8 | # | |
9 | # This program is distributed in the hope that it will be useful, | |
10 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | # GNU Affero General Public License for more details. | |
13 | # | |
14 | # You should have received a copy of the GNU Affero General Public License | |
15 | # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | ||
17 | import logging | |
18 | ||
19 | from celery.task import Task | |
20 | ||
21 | from mediagoblin import mg_globals as mgg | |
22 | from mediagoblin.db.util import ObjectId | |
23 | from mediagoblin.media_types import get_media_manager | |
24 | from mediagoblin.processing import mark_entry_failed, BaseProcessingFail | |
25 | ||
26 | _log = logging.getLogger(__name__) | |
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27 | logging.basicConfig() |
28 | _log.setLevel(logging.DEBUG) | |
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29 | |
30 | ||
31 | ################################ | |
32 | # Media processing initial steps | |
33 | ################################ | |
34 | ||
35 | class ProcessMedia(Task): | |
36 | """ | |
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37 | Pass this entry off for processing. |
38 | """ | |
39 | def run(self, media_id): | |
40 | """ | |
41 | Pass the media entry off to the appropriate processing function | |
42 | (for now just process_image...) | |
43 | """ | |
44 | entry = mgg.database.MediaEntry.one( | |
45 | {'_id': ObjectId(media_id)}) | |
46 | ||
47 | # Try to process, and handle expected errors. | |
48 | try: | |
eace050a | 49 | manager = get_media_manager(entry.media_type) |
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50 | |
51 | entry.state = u'processing' | |
52 | entry.save() | |
53 | ||
eace050a | 54 | _log.debug('Processing {0}'.format(entry)) |
64712915 | 55 | |
eace050a | 56 | manager['processor'](entry) |
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57 | |
58 | entry.state = u'processed' | |
59 | entry.save() | |
60 | ||
51eb0267 | 61 | except BaseProcessingFail as exc: |
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62 | mark_entry_failed(entry._id, exc) |
63 | return | |
64712915 | 64 | |
51eb0267 | 65 | except ImportError as exc: |
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66 | _log.error( |
67 | 'Entry {0} failed to process due to an import error: {1}'\ | |
68 | .format( | |
69 | entry.title, | |
70 | exc)) | |
71 | ||
72 | mark_entry_failed(entry._id, exc) | |
73 | ||
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74 | except Exception as exc: |
75 | _log.error('An unhandled exception was raised while' | |
76 | + ' processing {0}'.format( | |
77 | entry)) | |
78 | ||
79 | mark_entry_failed(entry._id, exc) | |
80 | raise | |
81 | ||
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82 | def on_failure(self, exc, task_id, args, kwargs, einfo): |
83 | """ | |
84 | If the processing failed we should mark that in the database. | |
85 | ||
86 | Assuming that the exception raised is a subclass of | |
87 | BaseProcessingFail, we can use that to get more information | |
88 | about the failure and store that for conveying information to | |
89 | users about the failure, etc. | |
90 | """ | |
91 | entry_id = args[0] | |
92 | mark_entry_failed(entry_id, exc) |