| 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.processing import mark_entry_failed, BaseProcessingFail |
| 24 | from mediagoblin.tools.processing import json_processing_callback |
| 25 | |
| 26 | _log = logging.getLogger(__name__) |
| 27 | logging.basicConfig() |
| 28 | _log.setLevel(logging.DEBUG) |
| 29 | |
| 30 | |
| 31 | ################################ |
| 32 | # Media processing initial steps |
| 33 | ################################ |
| 34 | |
| 35 | class ProcessMedia(Task): |
| 36 | """ |
| 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: |
| 49 | entry.state = u'processing' |
| 50 | entry.save() |
| 51 | |
| 52 | _log.debug('Processing {0}'.format(entry)) |
| 53 | |
| 54 | # run the processing code |
| 55 | entry.media_manager['processor'](entry) |
| 56 | |
| 57 | # We set the state to processed and save the entry here so there's |
| 58 | # no need to save at the end of the processing stage, probably ;) |
| 59 | entry.state = u'processed' |
| 60 | entry.save() |
| 61 | |
| 62 | json_processing_callback(entry) |
| 63 | except BaseProcessingFail as exc: |
| 64 | mark_entry_failed(entry.id, exc) |
| 65 | json_processing_callback(entry) |
| 66 | return |
| 67 | |
| 68 | except ImportError as exc: |
| 69 | _log.error( |
| 70 | 'Entry {0} failed to process due to an import error: {1}'\ |
| 71 | .format( |
| 72 | entry.title, |
| 73 | exc)) |
| 74 | |
| 75 | mark_entry_failed(entry.id, exc) |
| 76 | json_processing_callback(entry) |
| 77 | |
| 78 | except Exception as exc: |
| 79 | _log.error('An unhandled exception was raised while' |
| 80 | + ' processing {0}'.format( |
| 81 | entry)) |
| 82 | |
| 83 | mark_entry_failed(entry.id, exc) |
| 84 | json_processing_callback(entry) |
| 85 | raise |
| 86 | |
| 87 | def on_failure(self, exc, task_id, args, kwargs, einfo): |
| 88 | """ |
| 89 | If the processing failed we should mark that in the database. |
| 90 | |
| 91 | Assuming that the exception raised is a subclass of |
| 92 | BaseProcessingFail, we can use that to get more information |
| 93 | about the failure and store that for conveying information to |
| 94 | users about the failure, etc. |
| 95 | """ |
| 96 | entry_id = args[0] |
| 97 | mark_entry_failed(entry_id, exc) |
| 98 | |
| 99 | entry = mgg.database.MediaEntry.query.filter_by(id=entry_id).first() |
| 100 | json_processing_callback(entry) |