Caching: Turn the new caching into its own app

Extract the new smart file caching code from the common app
and convert it into its own new app called file_caching.

Signed-off-by: Roberto Rosario <Roberto.Rosario@mayan-edms.com>

.tx/config

@@ -13,18 +13,18 @@ source_lang = en
 source_file = mayan/apps/appearance/locale/en/LC_MESSAGES/django.po
 type = PO
 
-[mayan-edms.autoadmin-2-0]
-file_filter = mayan/apps/autoadmin/locale/<lang>/LC_MESSAGES/django.po
-source_lang = en
-source_file = mayan/apps/autoadmin/locale/en/LC_MESSAGES/django.po
-type = PO
-
 [mayan-edms.authentication-2-0]
 file_filter = mayan/apps/authentication/locale/<lang>/LC_MESSAGES/django.po
 source_lang = en
 source_file = mayan/apps/authentication/locale/en/LC_MESSAGES/django.po
 type = PO
 
+[mayan-edms.autoadmin-2-0]
+file_filter = mayan/apps/autoadmin/locale/<lang>/LC_MESSAGES/django.po
+source_lang = en
+source_file = mayan/apps/autoadmin/locale/en/LC_MESSAGES/django.po
+type = PO
+
 [mayan-edms.cabinets-2-0]
 file_filter = mayan/apps/cabinets/locale/<lang>/LC_MESSAGES/django.po
 source_lang = en
@@ -103,6 +103,12 @@ source_lang = en
 source_file = mayan/apps/events/locale/en/LC_MESSAGES/django.po
 type = PO
 
+[mayan-edms.file_caching-2-0]
+file_filter = mayan/apps/file_caching/locale/<lang>/LC_MESSAGES/django.po
+source_lang = en
+source_file = mayan/apps/file_caching/locale/en/LC_MESSAGES/django.po
+type = PO
+
 [mayan-edms.linking-2-0]
 file_filter = mayan/apps/linking/locale/<lang>/LC_MESSAGES/django.po
 source_lang = en

contrib/scripts/process_messages.py

@@ -12,10 +12,11 @@ APP_LIST = (
     'acls', 'appearance', 'authentication', 'autoadmin', 'cabinets',
     'checkouts', 'common', 'converter', 'django_gpg', 'document_comments',
     'document_indexing', 'document_parsing', 'document_signatures',
-    'document_states', 'documents', 'dynamic_search', 'events', 'linking',
+    'document_states', 'documents', 'dynamic_search', 'events',
-    'lock_manager', 'mayan_statistics', 'mailer', 'metadata', 'mirroring',
+    'file_caching', 'linking', 'lock_manager', 'mayan_statistics', 'mailer',
-    'motd', 'navigation', 'ocr', 'permissions', 'rest_api', 'smart_settings',
+    'metadata', 'mirroring', 'motd', 'navigation', 'ocr', 'permissions',
-    'sources', 'storage', 'tags', 'task_manager', 'user_management'
+    'rest_api', 'smart_settings', 'sources', 'storage', 'tags',
+    'task_manager', 'user_management'
 )
 
 LANGUAGE_LIST = (

mayan/apps/common/migrations/0012_auto_20181203_0812.py

@@ -1,124 +0,0 @@
-from __future__ import unicode_literals
-
-import django.db.models.deletion
-from django.db import migrations, models
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('common', '0011_auto_20180429_0758'),
-    ]
-
-    operations = [
-        migrations.CreateModel(
-            name='Cache',
-            fields=[
-                (
-                    'id', models.AutoField(
-                        auto_created=True, primary_key=True, serialize=False,
-                        verbose_name='ID'
-                    )
-                ),
-                (
-                    'name', models.CharField(
-                        max_length=128, unique=True, verbose_name='Name'
-                    )
-                ),
-                (
-                    'label', models.CharField(
-                        max_length=128, verbose_name='Label'
-                    )
-                ),
-                (
-                    'maximum_size', models.PositiveIntegerField(
-                        verbose_name='Maximum size'
-                    )
-                ),
-                (
-                    'storage_instance_path', models.CharField(
-                        max_length=255, unique=True,
-                        verbose_name='Storage instance path'
-                    )
-                ),
-            ],
-            options={
-                'verbose_name': 'Cache',
-                'verbose_name_plural': 'Caches',
-            },
-        ),
-        migrations.CreateModel(
-            name='CachePartition',
-            fields=[
-                (
-                    'id', models.AutoField(
-                        auto_created=True, primary_key=True, serialize=False,
-                        verbose_name='ID'
-                    )
-                ),
-                (
-                    'name', models.CharField(
-                        max_length=128, verbose_name='Name'
-                    )
-                ),
-                (
-                    'cache', models.ForeignKey(
-                        on_delete=django.db.models.deletion.CASCADE,
-                        related_name='partitions', to='common.Cache',
-                        verbose_name='Cache'
-                    )
-                ),
-            ],
-            options={
-                'verbose_name': 'Cache partition',
-                'verbose_name_plural': 'Cache partitions',
-            },
-        ),
-        migrations.CreateModel(
-            name='CachePartitionFile',
-            fields=[
-                (
-                    'id', models.AutoField(
-                        auto_created=True, primary_key=True, serialize=False,
-                        verbose_name='ID'
-                    )
-                ),
-                (
-                    'datetime', models.DateTimeField(
-                        auto_now_add=True, db_index=True,
-                        verbose_name='Date time'
-                    )
-                ),
-                (
-                    'filename', models.CharField(
-                        max_length=255, verbose_name='Filename'
-                    )
-                ),
-                (
-                    'file_size', models.PositiveIntegerField(
-                        default=0, verbose_name='File size'
-                    )
-                ),
-                (
-                    'partition', models.ForeignKey(
-                        on_delete=django.db.models.deletion.CASCADE,
-                        related_name='files', to='common.CachePartition',
-                        verbose_name='Cache partition'
-                    )
-                ),
-            ],
-            options={
-                'get_latest_by': 'datetime',
-                'verbose_name': 'Cache partition file',
-                'verbose_name_plural': 'Cache partition files',
-            },
-        ),
-        migrations.AlterUniqueTogether(
-            name='cachepartitionfile',
-            unique_together=set([('partition', 'filename')]),
-        ),
-        migrations.AlterUniqueTogether(
-            name='cachepartition',
-            unique_together=set([('cache', 'name')]),
-        ),
-    ]

mayan/apps/common/models.py

@@ -1,6 +1,5 @@
 from __future__ import unicode_literals
 
-from contextlib import contextmanager
 import logging
 import uuid
 
@@ -9,17 +8,10 @@ from pytz import common_timezones
 from django.conf import settings
 from django.contrib.contenttypes.fields import GenericForeignKey
 from django.contrib.contenttypes.models import ContentType
-from django.core.files.base import ContentFile
+from django.db import models
-from django.db import models, transaction
-from django.db.models import Sum
 from django.utils.encoding import force_text, python_2_unicode_compatible
-from django.utils.functional import cached_property
-from django.utils.module_loading import import_string
 from django.utils.translation import ugettext_lazy as _
 
-from mayan.apps.lock_manager import LockError
-from mayan.apps.lock_manager.runtime import locking_backend
-
 from .managers import ErrorLogEntryManager, UserLocaleProfileManager
 from .storages import storage_sharedupload
 
@@ -30,171 +22,6 @@ def upload_to(instance, filename):
     return 'shared-file-{}'.format(uuid.uuid4().hex)
 
 
-@python_2_unicode_compatible
-class Cache(models.Model):
-    name = models.CharField(
-        max_length=128, unique=True, verbose_name=_('Name')
-    )
-    label = models.CharField(max_length=128, verbose_name=_('Label'))
-    maximum_size = models.PositiveIntegerField(verbose_name=_('Maximum size'))
-    storage_instance_path = models.CharField(
-        max_length=255, unique=True, verbose_name=_('Storage instance path')
-    )
-
-    class Meta:
-        verbose_name = _('Cache')
-        verbose_name_plural = _('Caches')
-
-    def __str__(self):
-        return self.label
-
-    def get_files(self):
-        return CachePartitionFile.objects.filter(partition__cache__id=self.pk)
-
-    def get_total_size(self):
-        return self.get_files().aggregate(
-            file_size__sum=Sum('file_size')
-        )['file_size__sum'] or 0
-
-    def prune(self):
-        while self.get_total_size() > self.maximum_size:
-            self.get_files().earliest().delete()
-
-    def purge(self):
-        for partition in self.partitions.all():
-            partition.purge()
-
-    def save(self, *args, **kwargs):
-        result = super(Cache, self).save(*args, **kwargs)
-        self.prune()
-        return result
-
-    @cached_property
-    def storage(self):
-        return import_string(self.storage_instance_path)
-
-
-class CachePartition(models.Model):
-    cache = models.ForeignKey(
-        on_delete=models.CASCADE, related_name='partitions',
-        to=Cache, verbose_name=_('Cache')
-    )
-    name = models.CharField(
-        max_length=128, verbose_name=_('Name')
-    )
-
-    class Meta:
-        unique_together = ('cache', 'name')
-        verbose_name = _('Cache partition')
-        verbose_name_plural = _('Cache partitions')
-
-    @staticmethod
-    def get_combined_filename(parent, filename):
-        return '{}-{}'.format(parent, filename)
-
-    @contextmanager
-    def create_file(self, filename):
-        lock_id = 'cache_partition-create_file-{}-{}'.format(self.pk, filename)
-        try:
-            logger.debug('trying to acquire lock: %s', lock_id)
-            lock = locking_backend.acquire_lock(lock_id)
-            logger.debug('acquired lock: %s', lock_id)
-            try:
-                self.cache.prune()
-
-                # Since open "wb+" doesn't create files force the creation of an
-                # empty file.
-                self.cache.storage.delete(
-                    name=self.get_full_filename(filename=filename)
-                )
-                self.cache.storage.save(
-                    name=self.get_full_filename(filename=filename),
-                    content=ContentFile(content='')
-                )
-
-                try:
-                    with transaction.atomic():
-                        partition_file = self.files.create(filename=filename)
-                        yield partition_file.open(mode='wb')
-                        partition_file.update_size()
-                except Exception as exception:
-                    logger.error(
-                        'Unexpected exception while trying to save new '
-                        'cache file; %s', exception
-                    )
-                    self.cache.storage.delete(
-                        name=self.get_full_filename(filename=filename)
-                    )
-                    raise
-            finally:
-                lock.release()
-        except LockError:
-            logger.debug('unable to obtain lock: %s' % lock_id)
-            raise
-
-    def get_file(self, filename):
-        try:
-            return self.files.get(filename=filename)
-        except self.files.model.DoesNotExist:
-            return None
-
-    def get_full_filename(self, filename):
-        return CachePartition.get_combined_filename(
-            parent=self.name, filename=filename
-        )
-
-    def purge(self):
-        for parition_file in self.files.all():
-            parition_file.delete()
-
-
-class CachePartitionFile(models.Model):
-    partition = models.ForeignKey(
-        on_delete=models.CASCADE, related_name='files',
-        to=CachePartition, verbose_name=_('Cache partition')
-    )
-    datetime = models.DateTimeField(
-        auto_now_add=True, db_index=True, verbose_name=_('Date time')
-    )
-    filename = models.CharField(max_length=255, verbose_name=_('Filename'))
-    file_size = models.PositiveIntegerField(
-        default=0, verbose_name=_('File size')
-    )
-
-    class Meta:
-        get_latest_by = 'datetime'
-        unique_together = ('partition', 'filename')
-        verbose_name = _('Cache partition file')
-        verbose_name_plural = _('Cache partition files')
-
-    def delete(self, *args, **kwargs):
-        self.partition.cache.storage.delete(name=self.full_filename)
-        return super(CachePartitionFile, self).delete(*args, **kwargs)
-
-    @cached_property
-    def full_filename(self):
-        return CachePartition.get_combined_filename(
-            parent=self.partition.name, filename=self.filename
-        )
-
-    def open(self, mode='rb'):
-        try:
-            return self.partition.cache.storage.open(
-                name=self.full_filename, mode=mode
-            )
-        except Exception as exception:
-            logger.error(
-                'Unexpected exception opening the cache file; %s', exception
-            )
-            raise
-
-    def update_size(self):
-        self.file_size = self.partition.cache.storage.size(
-            name=self.full_filename
-        )
-        self.save()
-
-
 class ErrorLogEntry(models.Model):
     """
     Class to store an error log for any object. Uses generic foreign keys to

mayan/apps/documents/handlers.py

@@ -27,7 +27,7 @@ def create_default_document_type(sender, **kwargs):
 
 
 def handler_create_document_cache(sender, **kwargs):
-    Cache = apps.get_model(app_label='common', model_name='Cache')
+    Cache = apps.get_model(app_label='file_caching', model_name='Cache')
     Cache.objects.update_or_create(
         defaults={
             'label': _('Document images'),

mayan/apps/documents/models/document_version_models.py

@@ -112,7 +112,7 @@ class DocumentVersion(models.Model):
 
     @cached_property
     def cache(self):
-        Cache = apps.get_model(app_label='common', model_name='Cache')
+        Cache = apps.get_model(app_label='file_caching', model_name='Cache')
         return Cache.objects.get(name=DOCUMENT_IMAGES_CACHE_NAME)
 
     @cached_property

mayan/apps/file_caching/__init__.py

@@ -0,0 +1,3 @@
+from __future__ import unicode_literals
+
+default_app_config = 'mayan.apps.file_caching.apps.FileCachingConfig'

mayan/apps/file_caching/admin.py

@@ -0,0 +1,10 @@
+from __future__ import unicode_literals
+
+from django.contrib import admin
+
+from .models import Cache
+
+
+@admin.register(Cache)
+class CacheAdmin(admin.ModelAdmin):
+    list_display = ('name', 'label', 'storage_instance_path', 'maximum_size')

mayan/apps/file_caching/apps.py

@@ -0,0 +1,8 @@
+from __future__ import unicode_literals
+
+from mayan.apps.common import MayanAppConfig
+
+
+class FileCachingConfig(MayanAppConfig):
+    has_tests = False
+    name = 'mayan.apps.file_caching'

mayan/apps/file_caching/locale/ar/LC_MESSAGES/django.po

@@ -0,0 +1,72 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=6; plural=n==0 ? 0 : n==1 ? 1 : n==2 ? 2 : n%100>=3 "
+"&& n%100<=10 ? 3 : n%100>=11 && n%100<=99 ? 4 : 5;\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/bg/LC_MESSAGES/django.po

@@ -0,0 +1,71 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/bs_BA/LC_MESSAGES/django.po

@@ -0,0 +1,70 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/da/LC_MESSAGES/django.po

@@ -0,0 +1,71 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/de_DE/LC_MESSAGES/django.po

@@ -0,0 +1,70 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/en/LC_MESSAGES/django.po

@@ -0,0 +1,70 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/es/LC_MESSAGES/django.po

@@ -0,0 +1,71 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/fa/LC_MESSAGES/django.po

@@ -0,0 +1,71 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=1; plural=0;\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/fr/LC_MESSAGES/django.po

@@ -0,0 +1,71 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n > 1);\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/hu/LC_MESSAGES/django.po

@@ -0,0 +1,71 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/id/LC_MESSAGES/django.po

@@ -0,0 +1,71 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=1; plural=0;\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/it/LC_MESSAGES/django.po

@@ -0,0 +1,71 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/nl_NL/LC_MESSAGES/django.po

@@ -0,0 +1,70 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/pl/LC_MESSAGES/django.po

@@ -0,0 +1,73 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=4; plural=(n==1 ? 0 : (n%10>=2 && n%10<=4) && (n"
+"%100<12 || n%100>=14) ? 1 : n!=1 && (n%10>=0 && n%10<=1) || (n%10>=5 && n"
+"%10<=9) || (n%100>=12 && n%100<=14) ? 2 : 3);\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/pt/LC_MESSAGES/django.po

@@ -0,0 +1,71 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/pt_BR/LC_MESSAGES/django.po

@@ -0,0 +1,71 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n > 1);\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/ro_RO/LC_MESSAGES/django.po

@@ -0,0 +1,70 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/ru/LC_MESSAGES/django.po

@@ -0,0 +1,73 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=4; plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && n"
+"%10<=4 && (n%100<12 || n%100>14) ? 1 : n%10==0 || (n%10>=5 && n%10<=9) || (n"
+"%100>=11 && n%100<=14)? 2 : 3);\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/sl_SI/LC_MESSAGES/django.po

@@ -0,0 +1,70 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/tr_TR/LC_MESSAGES/django.po

@@ -0,0 +1,70 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/vi_VN/LC_MESSAGES/django.po

@@ -0,0 +1,70 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/locale/zh_CN/LC_MESSAGES/django.po

@@ -0,0 +1,70 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-12-07 21:32-0400\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+
+#: models.py:23 models.py:70
+msgid "Name"
+msgstr ""
+
+#: models.py:25
+msgid "Label"
+msgstr ""
+
+#: models.py:26
+msgid "Maximum size"
+msgstr ""
+
+#: models.py:28
+msgid "Storage instance path"
+msgstr ""
+
+#: models.py:32 models.py:67
+msgid "Cache"
+msgstr ""
+
+#: models.py:33
+msgid "Caches"
+msgstr ""
+
+#: models.py:75 models.py:141
+msgid "Cache partition"
+msgstr ""
+
+#: models.py:76
+msgid "Cache partitions"
+msgstr ""
+
+#: models.py:144
+msgid "Date time"
+msgstr ""
+
+#: models.py:146
+msgid "Filename"
+msgstr ""
+
+#: models.py:148
+msgid "File size"
+msgstr ""
+
+#: models.py:154
+msgid "Cache partition file"
+msgstr ""
+
+#: models.py:155
+msgid "Cache partition files"
+msgstr ""

mayan/apps/file_caching/migrations/0001_initial.py

@@ -0,0 +1,66 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.16 on 2018-12-08 01:28
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Cache',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=128, unique=True, verbose_name='Name')),
+                ('label', models.CharField(max_length=128, verbose_name='Label')),
+                ('maximum_size', models.PositiveIntegerField(verbose_name='Maximum size')),
+                ('storage_instance_path', models.CharField(max_length=255, unique=True, verbose_name='Storage instance path')),
+            ],
+            options={
+                'verbose_name': 'Cache',
+                'verbose_name_plural': 'Caches',
+            },
+        ),
+        migrations.CreateModel(
+            name='CachePartition',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=128, verbose_name='Name')),
+                ('cache', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='partitions', to='file_caching.Cache', verbose_name='Cache')),
+            ],
+            options={
+                'verbose_name': 'Cache partition',
+                'verbose_name_plural': 'Cache partitions',
+            },
+        ),
+        migrations.CreateModel(
+            name='CachePartitionFile',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('datetime', models.DateTimeField(auto_now_add=True, db_index=True, verbose_name='Date time')),
+                ('filename', models.CharField(max_length=255, verbose_name='Filename')),
+                ('file_size', models.PositiveIntegerField(default=0, verbose_name='File size')),
+                ('partition', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='files', to='file_caching.CachePartition', verbose_name='Cache partition')),
+            ],
+            options={
+                'get_latest_by': 'datetime',
+                'verbose_name': 'Cache partition file',
+                'verbose_name_plural': 'Cache partition files',
+            },
+        ),
+        migrations.AlterUniqueTogether(
+            name='cachepartitionfile',
+            unique_together=set([('partition', 'filename')]),
+        ),
+        migrations.AlterUniqueTogether(
+            name='cachepartition',
+            unique_together=set([('cache', 'name')]),
+        ),
+    ]

mayan/apps/file_caching/models.py

@@ -0,0 +1,182 @@
+from __future__ import unicode_literals
+
+from contextlib import contextmanager
+import logging
+
+from django.core.files.base import ContentFile
+from django.db import models, transaction
+from django.db.models import Sum
+from django.utils.encoding import python_2_unicode_compatible
+from django.utils.functional import cached_property
+from django.utils.module_loading import import_string
+from django.utils.translation import ugettext_lazy as _
+
+from mayan.apps.lock_manager import LockError
+from mayan.apps.lock_manager.runtime import locking_backend
+
+logger = logging.getLogger(__name__)
+
+
+@python_2_unicode_compatible
+class Cache(models.Model):
+    name = models.CharField(
+        max_length=128, unique=True, verbose_name=_('Name')
+    )
+    label = models.CharField(max_length=128, verbose_name=_('Label'))
+    maximum_size = models.PositiveIntegerField(verbose_name=_('Maximum size'))
+    storage_instance_path = models.CharField(
+        max_length=255, unique=True, verbose_name=_('Storage instance path')
+    )
+
+    class Meta:
+        verbose_name = _('Cache')
+        verbose_name_plural = _('Caches')
+
+    def __str__(self):
+        return self.label
+
+    def get_files(self):
+        return CachePartitionFile.objects.filter(partition__cache__id=self.pk)
+
+    def get_total_size(self):
+        return self.get_files().aggregate(
+            file_size__sum=Sum('file_size')
+        )['file_size__sum'] or 0
+
+    def prune(self):
+        while self.get_total_size() > self.maximum_size:
+            self.get_files().earliest().delete()
+
+    def purge(self):
+        for partition in self.partitions.all():
+            partition.purge()
+
+    def save(self, *args, **kwargs):
+        result = super(Cache, self).save(*args, **kwargs)
+        self.prune()
+        return result
+
+    @cached_property
+    def storage(self):
+        return import_string(self.storage_instance_path)
+
+
+class CachePartition(models.Model):
+    cache = models.ForeignKey(
+        on_delete=models.CASCADE, related_name='partitions',
+        to=Cache, verbose_name=_('Cache')
+    )
+    name = models.CharField(
+        max_length=128, verbose_name=_('Name')
+    )
+
+    class Meta:
+        unique_together = ('cache', 'name')
+        verbose_name = _('Cache partition')
+        verbose_name_plural = _('Cache partitions')
+
+    @staticmethod
+    def get_combined_filename(parent, filename):
+        return '{}-{}'.format(parent, filename)
+
+    @contextmanager
+    def create_file(self, filename):
+        lock_id = 'cache_partition-create_file-{}-{}'.format(self.pk, filename)
+        try:
+            logger.debug('trying to acquire lock: %s', lock_id)
+            lock = locking_backend.acquire_lock(lock_id)
+            logger.debug('acquired lock: %s', lock_id)
+            try:
+                self.cache.prune()
+
+                # Since open "wb+" doesn't create files force the creation of an
+                # empty file.
+                self.cache.storage.delete(
+                    name=self.get_full_filename(filename=filename)
+                )
+                self.cache.storage.save(
+                    name=self.get_full_filename(filename=filename),
+                    content=ContentFile(content='')
+                )
+
+                try:
+                    with transaction.atomic():
+                        partition_file = self.files.create(filename=filename)
+                        yield partition_file.open(mode='wb')
+                        partition_file.update_size()
+                except Exception as exception:
+                    logger.error(
+                        'Unexpected exception while trying to save new '
+                        'cache file; %s', exception
+                    )
+                    self.cache.storage.delete(
+                        name=self.get_full_filename(filename=filename)
+                    )
+                    raise
+            finally:
+                lock.release()
+        except LockError:
+            logger.debug('unable to obtain lock: %s' % lock_id)
+            raise
+
+    def get_file(self, filename):
+        try:
+            return self.files.get(filename=filename)
+        except self.files.model.DoesNotExist:
+            return None
+
+    def get_full_filename(self, filename):
+        return CachePartition.get_combined_filename(
+            parent=self.name, filename=filename
+        )
+
+    def purge(self):
+        for parition_file in self.files.all():
+            parition_file.delete()
+
+
+class CachePartitionFile(models.Model):
+    partition = models.ForeignKey(
+        on_delete=models.CASCADE, related_name='files',
+        to=CachePartition, verbose_name=_('Cache partition')
+    )
+    datetime = models.DateTimeField(
+        auto_now_add=True, db_index=True, verbose_name=_('Date time')
+    )
+    filename = models.CharField(max_length=255, verbose_name=_('Filename'))
+    file_size = models.PositiveIntegerField(
+        default=0, verbose_name=_('File size')
+    )
+
+    class Meta:
+        get_latest_by = 'datetime'
+        unique_together = ('partition', 'filename')
+        verbose_name = _('Cache partition file')
+        verbose_name_plural = _('Cache partition files')
+
+    def delete(self, *args, **kwargs):
+        self.partition.cache.storage.delete(name=self.full_filename)
+        return super(CachePartitionFile, self).delete(*args, **kwargs)
+
+    @cached_property
+    def full_filename(self):
+        return CachePartition.get_combined_filename(
+            parent=self.partition.name, filename=self.filename
+        )
+
+    def open(self, mode='rb'):
+        try:
+            return self.partition.cache.storage.open(
+                name=self.full_filename, mode=mode
+            )
+        except Exception as exception:
+            logger.error(
+                'Unexpected exception opening the cache file; %s', exception
+            )
+            raise
+
+    def update_size(self):
+        self.file_size = self.partition.cache.storage.size(
+            name=self.full_filename
+        )
+        self.save()

mayan/settings/base.py

@@ -89,6 +89,7 @@ INSTALLED_APPS = (
     'mayan.apps.django_gpg',
     'mayan.apps.dynamic_search',
     'mayan.apps.events',
+    'mayan.apps.file_caching',
     'mayan.apps.lock_manager',
     'mayan.apps.mimetype',
     'mayan.apps.navigation',