Initial changes to support the new Django 1.6 project structure

mayan/apps/lock_manager/models.py

@@ -0,0 +1,39 @@
+from __future__ import absolute_import
+
+import datetime
+
+from django.db import models
+from django.utils.translation import ugettext_lazy as _
+
+from .managers import LockManager
+from .conf.settings import DEFAULT_LOCK_TIMEOUT
+
+
+class Lock(models.Model):
+    creation_datetime = models.DateTimeField(verbose_name=_(u'creation datetime'))
+    timeout = models.IntegerField(default=DEFAULT_LOCK_TIMEOUT, verbose_name=_(u'timeout'))
+    name = models.CharField(max_length=48, verbose_name=_(u'name'), unique=True)
+
+    objects = LockManager()
+
+    def __unicode__(self):
+        return self.name
+
+    def save(self, *args, **kwargs):
+        self.creation_datetime = datetime.datetime.now()
+        if not self.timeout and not kwargs.get('timeout'):
+            self.timeout = DEFAULT_LOCK_TIMEOUT
+
+        super(Lock, self).save(*args, **kwargs)
+
+    def release(self):
+        try:
+            lock = Lock.objects.get(name=self.name, creation_datetime=self.creation_datetime)
+            lock.delete()
+        except Lock.DoesNotExist:
+            # Out lock expired and was reassigned
+            pass
+
+    class Meta:
+        verbose_name = _(u'lock')
+        verbose_name_plural = _(u'locks')