Load the converter class on demand

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

mayan/apps/documents/models/document_page_models.py

@@ -12,10 +12,11 @@ from django.utils.translation import ugettext_lazy as _
 
 from mayan.apps.converter import (
     BaseTransformation, TransformationResize, TransformationRotate,
-    TransformationZoom, converter_class
+    TransformationZoom
 )
 from mayan.apps.converter.literals import DEFAULT_ROTATION, DEFAULT_ZOOM_LEVEL
 from mayan.apps.converter.models import Transformation
+from mayan.apps.converter.utils import get_converter_class
 
 from ..managers import DocumentPageManager
 from ..settings import (
@@ -67,7 +68,7 @@ class DocumentPage(models.Model):
 
     def detect_orientation(self):
         with self.document_version.open() as file_object:
-            converter = converter_class(
+            converter = get_converter_class()(
                 file_object=file_object,
                 mime_type=self.document_version.mimetype
             )
@@ -198,7 +199,7 @@ class DocumentPage(models.Model):
         cache_file = self.cache_partition.get_file(filename=cache_filename)
         if not setting_disable_base_image_cache.value and cache_file:
             logger.debug('Page cache file "%s" found', cache_filename)
-            converter = converter_class(
+            converter = get_converter_class()(
                 file_object=cache_file.open()
             )
 
@@ -206,7 +207,7 @@ class DocumentPage(models.Model):
         else:
             logger.debug('Page cache file "%s" not found', cache_filename)
 
-            converter = converter_class(
+            converter = get_converter_class()(
                 file_object=self.document_version.get_intermidiate_file()
             )
             converter.seek(page_number=self.page_number - 1)

mayan/apps/documents/models/document_version_models.py

@@ -11,9 +11,10 @@ from django.utils.encoding import force_text, python_2_unicode_compatible
 from django.utils.functional import cached_property
 from django.utils.translation import ugettext_lazy as _
 
-from mayan.apps.converter import TransformationRotate, converter_class
+from mayan.apps.converter import TransformationRotate
 from mayan.apps.converter.exceptions import InvalidOfficeFormat, PageCountError
 from mayan.apps.converter.models import Transformation
+from mayan.apps.converter.utils import get_converter_class
 from mayan.apps.mimetype.api import get_mimetype
 
 from ..events import event_document_new_version, event_document_version_revert
@@ -200,7 +201,7 @@ class DocumentVersion(models.Model):
             logger.debug('Intermidiate file not found.')
 
             try:
-                converter = converter_class(file_object=self.open())
+                converter = get_converter_class()(file_object=self.open())
                 pdf_file_object = converter.to_pdf()
 
                 with self.cache_partition.create_file(filename='intermediate_file') as file_object:
@@ -419,7 +420,7 @@ class DocumentVersion(models.Model):
     def update_page_count(self, save=True):
         try:
             with self.open() as file_object:
-                converter = converter_class(
+                converter = get_converter_class()(
                     file_object=file_object, mime_type=self.mimetype
                 )
                 detected_pages = converter.get_page_count()

mayan/apps/ocr/classes.py

@@ -1,6 +1,6 @@
 from __future__ import unicode_literals
 
-from mayan.apps.converter import converter_class
+from mayan.apps.converter.utils import get_converter_class
 
 
 class OCRBackendBase(object):
@@ -10,7 +10,7 @@ class OCRBackendBase(object):
         if not transformations:
             transformations = []
 
-        self.converter = converter_class(file_object=file_object)
+        self.converter = get_converter_class()(file_object=file_object)
 
         for transformation in transformations:
             self.converter.transform(transformation=transformation)

mayan/apps/sources/classes.py

@@ -13,7 +13,8 @@ from django.urls import reverse
 from django.utils.encoding import force_text, python_2_unicode_compatible
 from django.utils.six.moves.urllib.parse import quote_plus, unquote_plus
 
-from mayan.apps.converter import TransformationResize, converter_class
+from mayan.apps.converter import TransformationResize
+from mayan.apps.converter.utils import get_converter_class
 
 from .storages import storage_staging_file_image_cache
 
@@ -143,7 +144,7 @@ class StagingFile(object):
 
         try:
             file_object = open(self.get_full_path(), mode='rb')
-            converter = converter_class(file_object=file_object)
+            converter = get_converter_class()(file_object=file_object)
 
             page_image = converter.get_page()