First commit to support ocr subprocess

apps/ocr/__init__.py

@@ -1,21 +1,50 @@
+from multiprocessing import Queue
+
 from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import ugettext
+from django.db.utils import DatabaseError
 
 from common.api import register_links, register_menu
 from permissions.api import register_permissions
 
 from documents.models import Document
 
-PERMISSION_OCR_DOCUMENT = 'ocr_document'
+from models import DocumentQueue
+from literals import QUEUEDOCUMENT_STATE_PROCESSING, \
+    DOCUMENTQUEUE_STATE_STOPPED, QUEUEDOCUMENT_STATE_PENDING
 
+from api import start_queue_watcher
+
+#Permissions
+PERMISSION_OCR_DOCUMENT = 'ocr_document'
 register_permissions('ocr', [
     {'name':PERMISSION_OCR_DOCUMENT, 'label':_(u'Submit document for OCR')},
 ])
 
+#Links
 submit_document = {'text':_('submit to OCR queue'), 'view':'submit_document', 'args':'object.id', 'famfam':'page_lightning', 'permissions':{'namespace':'ocr', 'permissions':[PERMISSION_OCR_DOCUMENT]}}
-
 register_links(Document, [submit_document], menu_name='sidebar')
 
+#Menus
 #register_menu([
 #    {'text':_('OCR'), 'view':'ocr_queue', 'links':[
 #        ocr_queue
 #    ],'famfam':'hourglass','position':5}])
+
+
+try:
+    default_queue, created = DocumentQueue.objects.get_or_create(name='default')
+    if created:
+        default_queue.label = ugettext(u'Default')
+        default_queue.save()
+
+    for queue in DocumentQueue.objects.all():
+        queue.state = DOCUMENTQUEUE_STATE_STOPPED
+        queue.save()
+        start_queue_watcher(queue.name)
+        for document in queue.queuedocument_set.filter(state=QUEUEDOCUMENT_STATE_PROCESSING):
+            document.state = QUEUEDOCUMENT_STATE_PENDING
+            document.save()
+except DatabaseError:
+    #syncdb
+    pass