Initial changes for the new queue based OCR processing

apps/ocr/__init__.py

@@ -17,47 +17,43 @@ from project_tools.api import register_tool
 from acls.api import class_permissions
 from scheduler.api import register_interval_job
 from statistics.api import register_statistics
+from queue_manager.models import Queue
 
 from .conf.settings import (AUTOMATIC_OCR, QUEUE_PROCESSING_INTERVAL)
-from .models import DocumentQueue, QueueTransformation
+from .models import OCRProcessingSingleton
 from .tasks import task_process_document_queues
 from .permissions import PERMISSION_OCR_DOCUMENT
 from .exceptions import AlreadyQueued
 from . import models as ocr_models
 from .statistics import get_statistics
+from .literals import OCR_QUEUE_NAME
 
 logger = logging.getLogger(__name__)
 
 from .links import (submit_document, re_queue_multiple_document,
-    queue_document_multiple_delete, document_queue_disable,
+    queue_document_multiple_delete, ocr_disable,
-    document_queue_enable, all_document_ocr_cleanup, queue_document_list,
+    ocr_enable, all_document_ocr_cleanup, ocr_log,
-    ocr_tool_link, setup_queue_transformation_list,
+    ocr_tool_link, submit_document_multiple)
-    setup_queue_transformation_create, setup_queue_transformation_edit,
-    setup_queue_transformation_delete, submit_document_multiple)
 
 bind_links([Document], [submit_document])
-bind_links([DocumentQueue], [document_queue_disable, document_queue_enable, setup_queue_transformation_list])
+bind_links([OCRProcessingSingleton], [ocr_disable, ocr_enable])
-bind_links([QueueTransformation], [setup_queue_transformation_edit, setup_queue_transformation_delete])
+#bind_links([QueueTransformation], [setup_queue_transformation_edit, setup_queue_transformation_delete])
 
-register_multi_item_links(['queue_document_list'], [re_queue_multiple_document, queue_document_multiple_delete])
+#register_multi_item_links(['queue_document_list'], [re_queue_multiple_document, queue_document_multiple_delete])
 
-bind_links(['setup_queue_transformation_create', 'setup_queue_transformation_edit', 'setup_queue_transformation_delete', 'document_queue_disable', 'document_queue_enable', 'queue_document_list', 'setup_queue_transformation_list'], [queue_document_list], menu_name='secondary_menu')
+#bind_links(['setup_queue_transformation_create', 'setup_queue_transformation_edit', 'setup_queue_transformation_delete', 'document_queue_disable', 'document_queue_enable', 'queue_document_list', 'setup_queue_transformation_list'], [queue_document_list], menu_name='secondary_menu')
-bind_links(['setup_queue_transformation_edit', 'setup_queue_transformation_delete', 'setup_queue_transformation_list', 'setup_queue_transformation_create'], [setup_queue_transformation_create], menu_name='sidebar')
+#bind_links(['setup_queue_transformation_edit', 'setup_queue_transformation_delete', 'setup_queue_transformation_list', 'setup_queue_transformation_create'], [setup_queue_transformation_create], menu_name='sidebar')
 
 register_maintenance_links([all_document_ocr_cleanup], namespace='ocr', title=_(u'OCR'))
-register_multi_item_links(['folder_view', 'search', 'results', 'index_instance_node_view', 'document_find_duplicates', 'document_type_document_list', 'document_group_view', 'document_list', 'document_list_recent'], [submit_document_multiple])
+#register_multi_item_links(['folder_view', 'search', 'results', 'index_instance_node_view', 'document_find_duplicates', 'document_type_document_list', 'document_group_view', 'document_list', 'document_list_recent'], [submit_document_multiple])
 
 
 @transaction.commit_on_success
-def create_default_queue():
+def create_ocr_queue():
     try:
-        default_queue, created = DocumentQueue.objects.get_or_create(name='default')
+        queue, created = Queue.objects.get_or_create(name=OCR_QUEUE_NAME, defaults={'label': _('OCR'), 'unique_names': True})
     except DatabaseError:
         transaction.rollback()
-    else:
-        if created:
-            default_queue.label = ugettext(u'Default')
-            default_queue.save()
 
 
 @receiver(post_save, dispatch_uid='document_post_save', sender=DocumentVersion)
@@ -81,11 +77,10 @@ def document_post_save(sender, instance, **kwargs):
 #        task_process_document_queues()
 
 
-@receiver(post_syncdb, dispatch_uid='create_default_queue', sender=ocr_models)
+#@receiver(post_syncdb, dispatch_uid='create_ocr_queue_on_syncdb', sender=ocr_models)
-def create_default_queue_signal_handler(sender, **kwargs):
+#def create_ocr_queue_on_syncdb(sender, **kwargs):
-    create_default_queue()
 
-register_interval_job('task_process_document_queues', _(u'Checks the OCR queue for pending documents.'), task_process_document_queues, seconds=QUEUE_PROCESSING_INTERVAL)
+#register_interval_job('task_process_document_queues', _(u'Checks the OCR queue for pending documents.'), task_process_document_queues, seconds=QUEUE_PROCESSING_INTERVAL)
 
 register_tool(ocr_tool_link)
 
@@ -93,4 +88,5 @@ class_permissions(Document, [
     PERMISSION_OCR_DOCUMENT,
 ])
 
-register_statistics(get_statistics)
+#register_statistics(get_statistics)
+create_ocr_queue()

apps/ocr/admin.py

@@ -1,3 +1,4 @@
+"""
 from __future__ import absolute_import
 
 from django.contrib import admin
@@ -18,3 +19,4 @@ class DocumentQueueAdmin(admin.ModelAdmin):
 
 
 admin.site.register(DocumentQueue, DocumentQueueAdmin)
+"""

apps/ocr/api.py

@@ -87,7 +87,7 @@ def do_document_ocr(queue_document):
     parser, if the parser fails or if there is no parser registered for
     the document mimetype do a visual OCR by calling tesseract
     """
-    for document_page in queue_document.document.pages.all():
+    for document_page in queue_document.document_version.pages.all():
         try:
             # Try to extract text by means of a parser
             parse_document_page(document_page)

apps/ocr/exceptions.py

@@ -21,3 +21,11 @@ class UnpaperError(Exception):
 
 class ReQueueError(Exception):
     pass
+
+
+class OCRProcessingAlreadyDisabled(Exception):
+    pass
+    
+    
+class OCRProcessingAlreadyEnabled(Exception):
+    pass

apps/ocr/forms.py

@@ -1,3 +1,4 @@
+"""
 from __future__ import absolute_import
 
 from django import forms
@@ -19,3 +20,4 @@ class QueueTransformationForm_create(forms.ModelForm):
     class Meta:
         model = QueueTransformation
         exclude = ('content_type', 'object_id')
+"""

apps/ocr/links.py

@@ -7,7 +7,18 @@ from navigation.api import Link
 from .permissions import (PERMISSION_OCR_DOCUMENT,
     PERMISSION_OCR_DOCUMENT_DELETE, PERMISSION_OCR_QUEUE_ENABLE_DISABLE,
     PERMISSION_OCR_CLEAN_ALL_PAGES)
+from .models import OCRProcessingSingleton
 
+def is_enabled(context):
+    return OCRProcessingSingleton.get().is_enabled()
+
+def is_disabled(context):
+    return not OCRProcessingSingleton.get().is_enabled()
+    
+    
+ocr_log = Link(text=_(u'queue document list'), view='ocr_log', sprite='text', permissions=[PERMISSION_OCR_DOCUMENT])
+ocr_disable = Link(text=_(u'disable OCR processing'), view='ocr_disable', sprite='control_stop_blue', permissions=[PERMISSION_OCR_QUEUE_ENABLE_DISABLE], conditional_disable=is_disabled)
+ocr_enable = Link(text=_(u'enable OCR processing'), view='ocr_enable', sprite='control_play_blue', permissions=[PERMISSION_OCR_QUEUE_ENABLE_DISABLE], conditional_disable=is_enabled)
 submit_document = Link(text=_('submit to OCR queue'), view='submit_document', args='object.id', sprite='hourglass_add', permissions=[PERMISSION_OCR_DOCUMENT])
 submit_document_multiple = Link(text=_('submit to OCR queue'), view='submit_document_multiple', sprite='hourglass_add', permissions=[PERMISSION_OCR_DOCUMENT])
 re_queue_document = Link(text=_('re-queue'), view='re_queue_document', args='object.id', sprite='hourglass_add', permissions=[PERMISSION_OCR_DOCUMENT])
@@ -15,15 +26,12 @@ re_queue_multiple_document = Link(text=_('re-queue'), view='re_queue_multiple_do
 queue_document_delete = Link(text=_(u'delete'), view='queue_document_delete', args='object.id', sprite='hourglass_delete', permissions=[PERMISSION_OCR_DOCUMENT_DELETE])
 queue_document_multiple_delete = Link(text=_(u'delete'), view='queue_document_multiple_delete', sprite='hourglass_delete', permissions=[PERMISSION_OCR_DOCUMENT_DELETE])
 
-document_queue_disable = Link(text=_(u'stop queue'), view='document_queue_disable', args='queue.id', sprite='control_stop_blue', permissions=[PERMISSION_OCR_QUEUE_ENABLE_DISABLE])
-document_queue_enable = Link(text=_(u'activate queue'), view='document_queue_enable', args='queue.id', sprite='control_play_blue', permissions=[PERMISSION_OCR_QUEUE_ENABLE_DISABLE])
 
 all_document_ocr_cleanup = Link(text=_(u'clean up pages content'), view='all_document_ocr_cleanup', sprite='text_strikethrough', permissions=[PERMISSION_OCR_CLEAN_ALL_PAGES], description=_(u'Runs a language filter to remove common OCR mistakes from document pages content.'))
 
-queue_document_list = Link(text=_(u'queue document list'), view='queue_document_list', sprite='hourglass', permissions=[PERMISSION_OCR_DOCUMENT])
+ocr_tool_link = Link(text=_(u'OCR'), view='ocr_log', sprite='hourglass', icon='text.png', permissions=[PERMISSION_OCR_DOCUMENT])  # children_view_regex=[r'queue_', r'document_queue'])
-ocr_tool_link = Link(text=_(u'OCR'), view='queue_document_list', sprite='hourglass', icon='text.png', permissions=[PERMISSION_OCR_DOCUMENT], children_view_regex=[r'queue_', r'document_queue'])
 
-setup_queue_transformation_list = Link(text=_(u'transformations'), view='setup_queue_transformation_list', args='queue.pk', sprite='shape_move_front')
+#setup_queue_transformation_list = Link(text=_(u'transformations'), view='setup_queue_transformation_list', args='queue.pk', sprite='shape_move_front')
-setup_queue_transformation_create = Link(text=_(u'add transformation'), view='setup_queue_transformation_create', args='queue.pk', sprite='shape_square_add')
+#setup_queue_transformation_create = Link(text=_(u'add transformation'), view='setup_queue_transformation_create', args='queue.pk', sprite='shape_square_add')
-setup_queue_transformation_edit = Link(text=_(u'edit'), view='setup_queue_transformation_edit', args='transformation.pk', sprite='shape_square_edit')
+#setup_queue_transformation_edit = Link(text=_(u'edit'), view='setup_queue_transformation_edit', args='transformation.pk', sprite='shape_square_edit')
-setup_queue_transformation_delete = Link(text=_(u'delete'), view='setup_queue_transformation_delete', args='transformation.pk', sprite='shape_square_delete')
+#setup_queue_transformation_delete = Link(text=_(u'delete'), view='setup_queue_transformation_delete', args='transformation.pk', sprite='shape_square_delete')

apps/ocr/literals.py

@@ -1,25 +1,27 @@
 from django.utils.translation import ugettext_lazy as _
 
 
-DOCUMENTQUEUE_STATE_STOPPED = 's'
+OCR_STATE_DISABLED = 'd'
-DOCUMENTQUEUE_STATE_ACTIVE = 'a'
+OCR_STATE_ENABLED = 'e'
 
-DOCUMENTQUEUE_STATE_CHOICES = (
+OCR_STATE_CHOICES = (
-    (DOCUMENTQUEUE_STATE_STOPPED, _(u'stopped')),
+    (OCR_STATE_DISABLED, _(u'disabled')),
-    (DOCUMENTQUEUE_STATE_ACTIVE, _(u'active')),
+    (OCR_STATE_ENABLED, _(u'enabled')),
 )
 
 
-QUEUEDOCUMENT_STATE_PENDING = 'p'
+#QUEUEDOCUMENT_STATE_PENDING = 'p'
-QUEUEDOCUMENT_STATE_PROCESSING = 'i'
+#QUEUEDOCUMENT_STATE_PROCESSING = 'i'
-QUEUEDOCUMENT_STATE_ERROR = 'e'
+#QUEUEDOCUMENT_STATE_ERROR = 'e'
 
-QUEUEDOCUMENT_STATE_CHOICES = (
+#QUEUEDOCUMENT_STATE_CHOICES = (
-    (QUEUEDOCUMENT_STATE_PENDING, _(u'pending')),
+#    (QUEUEDOCUMENT_STATE_PENDING, _(u'pending')),
-    (QUEUEDOCUMENT_STATE_PROCESSING, _(u'processing')),
+#    (QUEUEDOCUMENT_STATE_PROCESSING, _(u'processing')),
-    (QUEUEDOCUMENT_STATE_ERROR, _(u'error')),
+#    (QUEUEDOCUMENT_STATE_ERROR, _(u'error')),
-)
+#)
 
 DEFAULT_OCR_FILE_FORMAT = u'tiff'
 DEFAULT_OCR_FILE_EXTENSION = u'tif'
 UNPAPER_FILE_FORMAT = u'ppm'
+
+OCR_QUEUE_NAME = 'ocr'

apps/ocr/managers.py

@@ -2,19 +2,19 @@ from __future__ import absolute_import
 
 from django.db import models
 
-from .exceptions import AlreadyQueued
+#from .exceptions import AlreadyQueued
 
 
-class DocumentQueueManager(models.Manager):
+class OCRProcessingManager(models.Manager):
-    '''
+    """
-    Module manager class to handle adding documents to an OCR document
+    Module manager class to handle adding documents to an OCR queue
-    queue
+    """
-    '''
+    def queue_document(self, document):
-    def queue_document(self, document, queue_name='default'):
+        pass
-        document_queue = self.model.objects.get(name=queue_name)
+        #document_queue = self.model.objects.get(name=queue_name)
-        if document_queue.queuedocument_set.filter(document=document):
+        #if document_queue.queuedocument_set.filter(document_version=document.latest_version):
-            raise AlreadyQueued
+        #    raise AlreadyQueued
 
-        document_queue.queuedocument_set.create(document=document, delay=True)
+        #document_queue.queuedocument_set.create(document_version=document.latest_version, delay=True)
 
-        return document_queue
+        #return document_queue

apps/ocr/models.py

@@ -1,7 +1,7 @@
 from __future__ import absolute_import
 
 from ast import literal_eval
-from datetime import datetime
+import datetime
 
 from django.db import models
 from django.utils.translation import ugettext_lazy as _
@@ -11,35 +11,109 @@ from django.contrib.contenttypes.models import ContentType
 from django.contrib.contenttypes import generic
 from django.core.exceptions import ValidationError
 
-from documents.models import Document
+from common.models import Singleton
+from documents.models import Document, DocumentVersion
 from converter.api import get_available_transformations_choices
 from sources.managers import SourceTransformationManager
 
-from .literals import (DOCUMENTQUEUE_STATE_CHOICES,
+from .literals import (OCR_STATE_CHOICES, OCR_STATE_ENABLED,
-    QUEUEDOCUMENT_STATE_PENDING, QUEUEDOCUMENT_STATE_CHOICES,
+    OCR_STATE_DISABLED)
-    QUEUEDOCUMENT_STATE_PROCESSING, DOCUMENTQUEUE_STATE_ACTIVE)
+from .managers import OCRProcessingManager
-from .managers import DocumentQueueManager
+from .exceptions import (ReQueueError, OCRProcessingAlreadyDisabled,
-from .exceptions import ReQueueError
+    OCRProcessingAlreadyEnabled)
 
 
-class DocumentQueue(models.Model):
+class OCRProcessingSingleton(Singleton):
-    name = models.CharField(max_length=64, unique=True, verbose_name=_(u'name'))
-    label = models.CharField(max_length=64, verbose_name=_(u'label'))
     state = models.CharField(max_length=4,
-        choices=DOCUMENTQUEUE_STATE_CHOICES,
+        choices=OCR_STATE_CHOICES,
-        default=DOCUMENTQUEUE_STATE_ACTIVE,
+        default=OCR_STATE_ENABLED,
         verbose_name=_(u'state'))
 
-    objects = DocumentQueueManager()
+    #objects = AnonymousUserSingletonManager()
-
-    class Meta:
-        verbose_name = _(u'document queue')
-        verbose_name_plural = _(u'document queues')
 
     def __unicode__(self):
-        return self.label
+        return ugettext('OCR processing')
+
+    def disable(self):
+        if self.state == OCR_STATE_DISABLED:
+            raise OCRProcessingAlreadyDisabled
+        
+        self.state = OCR_STATE_DISABLED
+        self.save()
+
+    def enable(self):
+        if self.state == OCR_STATE_ENABLED:
+            raise OCRProcessingAlreadyEnabled
+        
+        self.state = OCR_STATE_ENABLED
+        self.save()
+        
+    def is_enabled(self):
+        return self.state == OCR_STATE_ENABLED
+
+    class Meta:
+        verbose_name = verbose_name_plural = _(u'OCR processing properties')
+
+"""
+class OCRLog(models.Model):
+    #queue = models.ForeignKey(Queue, verbose_name=_(u'queue'))
+    document_version = models.ForeignKey(DocumentVersion, verbose_name=_(u'document version'))
+    datetime = models.DateTimeField(verbose_name=_(u'date time'), default=lambda: datetime.datetime.now(), db_index=True)
+    delay = models.BooleanField(verbose_name=_(u'delay OCR'), default=False)
+    #state = models.CharField(max_length=4,
+    #    choices=QUEUEDOCUMENT_STATE_CHOICES,
+    #    default=QUEUEDOCUMENT_STATE_PENDING,
+    #    verbose_name=_(u'state'))
+    result = models.TextField(blank=True, null=True, verbose_name=_(u'result'))
+    #node_name = models.CharField(max_length=32, verbose_name=_(u'node name'), blank=True, null=True)
+
+    class Meta:
+        ordering = ('datetime',)
+        verbose_name = _(u'OCR log entry')
+        verbose_name_plural = _(u'OCR log entries')
+
+    #def get_transformation_list(self):
+    #    return QueueTransformation.transformations.get_for_object_as_list(self)
+
+    def requeue(self):
+        pass
+        #if self.state == QUEUEDOCUMENT_STATE_PROCESSING:
+        #    raise ReQueueError
+        #else:
+        #    self.datetime_submitted = datetime.now()
+        #    self.state = QUEUEDOCUMENT_STATE_PENDING
+        #    self.delay = False
+        #    self.result = None
+        #    self.node_name = None
+        #    self.save()
+
+    def __unicode__(self):
+        try:
+            return unicode(self.document)
+        except ObjectDoesNotExist:
+            return ugettext(u'Missing document.')
+"""
+        
+#class DocumentQueue(models.Model):
+#    name = models.CharField(max_length=64, unique=True, verbose_name=_(u'name'))
+#    label = models.CharField(max_length=64, verbose_name=_(u'label'))
+#    state = models.CharField(max_length=4,
+#        choices=DOCUMENTQUEUE_STATE_CHOICES,
+#        default=DOCUMENTQUEUE_STATE_ACTIVE,
+#        verbose_name=_(u'state'))
+#
+#    objects = DocumentQueueManager()#
+#
+#    class Meta:
+#        verbose_name = _(u'document queue')
+#        verbose_name_plural = _(u'document queues')#
+#
+#    def __unicode__(self):
+#        return self.label
 
 
+
+"""
 class QueueDocument(models.Model):
     document_queue = models.ForeignKey(DocumentQueue, verbose_name=_(u'document queue'))
     document = models.ForeignKey(Document, verbose_name=_(u'document'))
@@ -121,3 +195,4 @@ class QueueTransformation(models.Model):
         ordering = ('order',)
         verbose_name = _(u'document queue transformation')
         verbose_name_plural = _(u'document queue transformations')
+"""

apps/ocr/permissions.py

@@ -7,6 +7,6 @@ from permissions.models import Permission, PermissionNamespace
 ocr_namespace = PermissionNamespace('ocr', _(u'OCR'))
 PERMISSION_OCR_DOCUMENT = Permission.objects.register(ocr_namespace, 'ocr_document', _(u'Submit documents for OCR'))
 PERMISSION_OCR_DOCUMENT_DELETE = Permission.objects.register(ocr_namespace, 'ocr_document_delete', _(u'Delete documents from OCR queue'))
-PERMISSION_OCR_QUEUE_ENABLE_DISABLE = Permission.objects.register(ocr_namespace, 'ocr_queue_enable_disable', _(u'Can enable/disable the OCR queue'))
+PERMISSION_OCR_QUEUE_ENABLE_DISABLE = Permission.objects.register(ocr_namespace, 'ocr_queue_enable_disable', _(u'Can enable/disable the OCR processing'))
 PERMISSION_OCR_CLEAN_ALL_PAGES = Permission.objects.register(ocr_namespace, 'ocr_clean_all_pages', _(u'Can execute the OCR clean up on all document pages'))
 PERMISSION_OCR_QUEUE_EDIT = Permission.objects.register(ocr_namespace, 'ocr_queue_edit', _(u'Can edit an OCR queue properties'))

apps/ocr/statistics.py

@@ -2,7 +2,7 @@ from __future__ import absolute_import
 
 from django.utils.translation import ugettext as _
 
-from .models import DocumentQueue, QueueDocument
+#from .models import DocumentQueue, QueueDocument
 
 
 def get_statistics():

apps/ocr/tasks.py

@@ -10,10 +10,10 @@ from job_processor.api import process_job
 from lock_manager import Lock, LockError
 
 from .api import do_document_ocr
-from .literals import (QUEUEDOCUMENT_STATE_PENDING,
+#from .literals import (QUEUEDOCUMENT_STATE_PENDING,
-    QUEUEDOCUMENT_STATE_PROCESSING, DOCUMENTQUEUE_STATE_ACTIVE,
+#    QUEUEDOCUMENT_STATE_PROCESSING, DOCUMENTQUEUE_STATE_ACTIVE,
-    QUEUEDOCUMENT_STATE_ERROR)
+#    QUEUEDOCUMENT_STATE_ERROR)
-from .models import QueueDocument, DocumentQueue
+#from .models import QueueDocument, DocumentQueue
 from .conf.settings import NODE_CONCURRENT_EXECUTION, REPLICATION_DELAY
 
 LOCK_EXPIRE = 60 * 10  # Lock expires in 10 minutes

apps/ocr/urls.py

@@ -1,16 +1,18 @@
 from django.conf.urls.defaults import patterns, url
 
 urlpatterns = patterns('ocr.views',
+    url(r'^log/$', 'ocr_log', (), 'ocr_log'),
+
+    url(r'^processing/enable/$', 'ocr_enable', (), 'ocr_enable'),
+    url(r'^processing/disable/$', 'ocr_disable', (), 'ocr_disable'),
+    
     url(r'^document/(?P<document_id>\d+)/submit/$', 'submit_document', (), 'submit_document'),
     url(r'^document/multiple/submit/$', 'submit_document_multiple', (), 'submit_document_multiple'),
-    url(r'^queue/document/list/$', 'queue_document_list', (), 'queue_document_list'),
     url(r'^queue/document/(?P<queue_document_id>\d+)/delete/$', 'queue_document_delete', (), 'queue_document_delete'),
     url(r'^queue/document/multiple/delete/$', 'queue_document_multiple_delete', (), 'queue_document_multiple_delete'),
     url(r'^queue/document/(?P<queue_document_id>\d+)/re-queue/$', 're_queue_document', (), 're_queue_document'),
     url(r'^queue/document/multiple/re-queue/$', 're_queue_multiple_document', (), 're_queue_multiple_document'),
 
-    url(r'^queue/(?P<document_queue_id>\d+)/enable/$', 'document_queue_enable', (), 'document_queue_enable'),
-    url(r'^queue/(?P<document_queue_id>\d+)/disable/$', 'document_queue_disable', (), 'document_queue_disable'),
 
     url(r'^document/all/clean_up/$', 'all_document_ocr_cleanup', (), 'all_document_ocr_cleanup'),
 

apps/ocr/views.py

@@ -18,38 +18,35 @@ from acls.models import AccessEntry
 from .permissions import (PERMISSION_OCR_DOCUMENT,
     PERMISSION_OCR_DOCUMENT_DELETE, PERMISSION_OCR_QUEUE_ENABLE_DISABLE,
     PERMISSION_OCR_CLEAN_ALL_PAGES, PERMISSION_OCR_QUEUE_EDIT)
-from .models import DocumentQueue, QueueDocument, QueueTransformation
+from .models import OCRProcessingSingleton
-from .literals import (QUEUEDOCUMENT_STATE_PROCESSING,
+#from .literals import (QUEUEDOCUMENT_STATE_PROCESSING,
-    DOCUMENTQUEUE_STATE_ACTIVE, DOCUMENTQUEUE_STATE_STOPPED)
+#    DOCUMENTQUEUE_STATE_ACTIVE, DOCUMENTQUEUE_STATE_STOPPED)
-from .exceptions import AlreadyQueued, ReQueueError
+from .exceptions import (AlreadyQueued, ReQueueError, OCRProcessingAlreadyDisabled,
+    OCRProcessingAlreadyEnabled)
 from .api import clean_pages
-from .forms import QueueTransformationForm, QueueTransformationForm_create
+#from .forms import QueueTransformationForm, QueueTransformationForm_create
 
 
-def queue_document_list(request, queue_name='default'):
+def ocr_log(request):
     Permission.objects.check_permissions(request.user, [PERMISSION_OCR_DOCUMENT])
 
-    document_queue = get_object_or_404(DocumentQueue, name=queue_name)
+    context = {
-
+        'queue': OCRProcessingSingleton.get(),
-    return object_list(
+        'object_name': _(u'OCR processing'),  # TODO fix, not working
-        request,
-        queryset=document_queue.queuedocument_set.all(),
-        template_name='generic_list.html',
-        extra_context={
-            'title': _(u'documents in queue: %s') % document_queue,
-            'hide_object': True,
-            'queue': document_queue,
-            'object_name': _(u'document queue'),
         'navigation_object_name': 'queue',
-            'list_object_variable_name': 'queue_document',
+        'object_list': [],
+        'title': _(u'OCR log items'),
+        #'hide_object': True,
+        #'hide_link': True,
         'extra_columns': [
-                {'name': 'document', 'attribute': encapsulate(lambda x: document_link(x.document) if hasattr(x, 'document') else _(u'Missing document.'))},
+            {'name': _(u'document'), 'attribute': encapsulate(lambda x: document_link(x.document_version.document) if hasattr(x, 'document_version') else _(u'Missing document.'))},
-                {'name': _(u'thumbnail'), 'attribute': encapsulate(lambda x: document_thumbnail(x.document))},
+            {'name': _(u'version'), 'attribute': 'document_version'},
-                {'name': 'submitted', 'attribute': encapsulate(lambda x: unicode(x.datetime_submitted).split('.')[0]), 'keep_together':True},
+            {'name': _(u'thumbnail'), 'attribute': encapsulate(lambda x: document_thumbnail(x.document_version.document))},
-                {'name': 'delay', 'attribute': 'delay'},
+            {'name': _('submitted'), 'attribute': encapsulate(lambda x: unicode(x.datetime_submitted).split('.')[0]), 'keep_together':True},
-                {'name': 'state', 'attribute': encapsulate(lambda x: x.get_state_display())},
+            #{'name': _('delay'), 'attribute': 'delay'},
-                {'name': 'node', 'attribute': 'node_name'},
+            #{'name': _('state'), 'attribute': encapsulate(lambda x: x.get_state_display())},
-                {'name': 'result', 'attribute': 'result'},
+            #{'name': _('node'), 'attribute': 'node_name'},
+            {'name': _('result'), 'attribute': 'result'},
         ],
         'multi_select_as_buttons': True,
         'sidebar_subtemplates_list': [
@@ -57,13 +54,75 @@ def queue_document_list(request, queue_name='default'):
                 'name': 'generic_subtemplate.html',
                 'context': {
                     'side_bar': True,
-                        'title': _(u'document queue properties'),
+                    'title': _(u'OCR processing properties'),
-                        'content': _(u'Current state: %s') % document_queue.get_state_display(),
+                    'content': _(u'Current state: %s') % OCRProcessingSingleton.get().get_state_display(),
                 }
             }
         ]
-        },
+    }
-    )
+
+    return render_to_response('generic_list.html', context,
+        context_instance=RequestContext(request))
+
+    #        'queue': document_queue,
+    #        'object_name': _(u'document queue'),
+    #        'navigation_object_name': 'queue',
+    #        'list_object_variable_name': 'queue_document',
+    #    },
+    #)
+
+
+def ocr_disable(request):
+    Permission.objects.check_permissions(request.user, [PERMISSION_OCR_QUEUE_ENABLE_DISABLE])
+
+    next = request.POST.get('next', request.GET.get('next', request.META.get('HTTP_REFERER', None)))
+    previous = request.POST.get('previous', request.GET.get('previous', request.META.get('HTTP_REFERER', None)))
+
+    if request.method == 'POST':
+        try:
+            OCRProcessingSingleton.get().disable()
+        except OCRProcessingAlreadyDisabled:
+            messages.warning(request, _(u'OCR processing already disabled.'))
+            return HttpResponseRedirect(previous)            
+        else:
+            messages.success(request, _(u'OCR processing disabled successfully.'))
+            return HttpResponseRedirect(next)
+
+    return render_to_response('generic_confirm.html', {
+        'queue': OCRProcessingSingleton.get(),
+        'navigation_object_name': 'queue',
+        'title': _(u'Are you sure you wish to disable OCR processing?'),
+        'next': next,
+        'previous': previous,
+        'form_icon': u'control_stop_blue.png',
+    }, context_instance=RequestContext(request))
+
+
+def ocr_enable(request):
+    Permission.objects.check_permissions(request.user, [PERMISSION_OCR_QUEUE_ENABLE_DISABLE])
+
+    next = request.POST.get('next', request.GET.get('next', request.META.get('HTTP_REFERER', None)))
+    previous = request.POST.get('previous', request.GET.get('previous', request.META.get('HTTP_REFERER', None)))
+
+    if request.method == 'POST':
+        try:
+            OCRProcessingSingleton.get().enable()
+        except OCRProcessingAlreadyDisabled:
+            messages.warning(request, _(u'OCR processing already enabled.'))
+            return HttpResponseRedirect(previous)            
+        else:
+            messages.success(request, _(u'OCR processing enabled successfully.'))
+            return HttpResponseRedirect(next)
+
+    return render_to_response('generic_confirm.html', {
+        'queue': OCRProcessingSingleton.get(),
+        'navigation_object_name': 'queue',
+        'title': _(u'Are you sure you wish to enable OCR processing?'),
+        'next': next,
+        'previous': previous,
+        'form_icon': u'control_play_blue.png',
+    }, context_instance=RequestContext(request))
+
 
 
 def queue_document_delete(request, queue_document_id=None, queue_document_id_list=None):
@@ -175,12 +234,12 @@ def re_queue_document(request, queue_document_id=None, queue_document_id_list=No
                 messages.success(
                     request,
                     _(u'Document: %(document)s was re-queued to the OCR queue: %(queue)s') % {
-                        'document': queue_document.document,
+                        'document': queue_document.document_version.document,
                         'queue': queue_document.document_queue.label
                     }
                 )
             except Document.DoesNotExist:
-                messages.error(request, _(u'Document id#: %d, no longer exists.') % queue_document.document_id)
+                messages.error(request, _(u'Document no longer in queue.'))
             except ReQueueError:
                 messages.warning(
                     request,
@@ -208,60 +267,6 @@ def re_queue_multiple_document(request):
     return re_queue_document(request, queue_document_id_list=request.GET.get('id_list', []))
 
 
-def document_queue_disable(request, document_queue_id):
-    Permission.objects.check_permissions(request.user, [PERMISSION_OCR_QUEUE_ENABLE_DISABLE])
-
-    next = request.POST.get('next', request.GET.get('next', request.META.get('HTTP_REFERER', None)))
-    previous = request.POST.get('previous', request.GET.get('previous', request.META.get('HTTP_REFERER', None)))
-    document_queue = get_object_or_404(DocumentQueue, pk=document_queue_id)
-
-    if document_queue.state == DOCUMENTQUEUE_STATE_STOPPED:
-        messages.warning(request, _(u'Document queue: %s, already stopped.') % document_queue)
-        return HttpResponseRedirect(previous)
-
-    if request.method == 'POST':
-        document_queue.state = DOCUMENTQUEUE_STATE_STOPPED
-        document_queue.save()
-        messages.success(request, _(u'Document queue: %s, stopped successfully.') % document_queue)
-        return HttpResponseRedirect(next)
-
-    return render_to_response('generic_confirm.html', {
-        'queue': document_queue,
-        'navigation_object_name': 'queue',
-        'title': _(u'Are you sure you wish to disable document queue: %s') % document_queue,
-        'next': next,
-        'previous': previous,
-        'form_icon': u'control_stop_blue.png',
-    }, context_instance=RequestContext(request))
-
-
-def document_queue_enable(request, document_queue_id):
-    Permission.objects.check_permissions(request.user, [PERMISSION_OCR_QUEUE_ENABLE_DISABLE])
-
-    next = request.POST.get('next', request.GET.get('next', request.META.get('HTTP_REFERER', None)))
-    previous = request.POST.get('previous', request.GET.get('previous', request.META.get('HTTP_REFERER', None)))
-    document_queue = get_object_or_404(DocumentQueue, pk=document_queue_id)
-
-    if document_queue.state == DOCUMENTQUEUE_STATE_ACTIVE:
-        messages.warning(request, _(u'Document queue: %s, already active.') % document_queue)
-        return HttpResponseRedirect(previous)
-
-    if request.method == 'POST':
-        document_queue.state = DOCUMENTQUEUE_STATE_ACTIVE
-        document_queue.save()
-        messages.success(request, _(u'Document queue: %s, activated successfully.') % document_queue)
-        return HttpResponseRedirect(next)
-
-    return render_to_response('generic_confirm.html', {
-        'queue': document_queue,
-        'navigation_object_name': 'queue',
-        'title': _(u'Are you sure you wish to activate document queue: %s') % document_queue,
-        'next': next,
-        'previous': previous,
-        'form_icon': u'control_play_blue.png',
-    }, context_instance=RequestContext(request))
-
-
 def all_document_ocr_cleanup(request):
     Permission.objects.check_permissions(request.user, [PERMISSION_OCR_CLEAN_ALL_PAGES])