Initial version of caching on top of memcached. Added runserver scrip…

…t to start daemon as well.

CodeStreak/contests/models/contest.py

@@ -1,10 +1,13 @@
 from django.db import models
 from django.contrib.auth.models import User
+
 from django.utils.timezone import now
+from django.core.cache import cache
 
 from CodeStreak.contests.models.task import Task
 
 class Contest(models.Model):
+  CACHE_PREFIX = 'contest'
   name = models.CharField(max_length=128)
   start_date = models.DateTimeField(null=True, blank=True, default=None)
   end_date = models.DateTimeField(null=True, blank=True, default=None)
@@ -36,17 +39,17 @@ def get_contest(cls, contest_id):
 
   @classmethod
   def get_task_ordering(cls, contest_id):
-    cached = False
-    if cached:
-      tasks = []
-    else:
+    cache_key = cls.CACHE_PREFIX + ":" + str(contest_id)
+    tasks = cache.get(cache_key)
+    if tasks == None:
       tasks = cls.objects.get(
         id=contest_id
       ).assigned_tasks.values(
         'id'
       )
-      tasks = [el['id'] for el in tasks]
-    return list(enumerate(tasks))
+      tasks = list(enumerate([el['id'] for el in tasks]))
+      cache.set(cache_key, tasks)
+    return tasks
 
   def get_registered_user_count(self):
     return self.registered_users.count()

CodeStreak/settings.py

@@ -96,13 +96,17 @@
 )
 
 MIDDLEWARE_CLASSES = (
+    #'django.middleware.cache.UpdateCacheMiddleware',
+    ############# first ######################################################
     'django.middleware.common.CommonMiddleware',
     'django.contrib.sessions.middleware.SessionMiddleware',
     'django.middleware.csrf.CsrfViewMiddleware',
     'django.contrib.auth.middleware.AuthenticationMiddleware',
     'django.contrib.messages.middleware.MessageMiddleware',
     # Uncomment the next line for simple clickjacking protection:
     # 'django.middleware.clickjacking.XFrameOptionsMiddleware',
+    ############## last ######################################################
+    #'django.middleware.cache.FetchFromCacheMiddleware',
 )
 
 ROOT_URLCONF = 'CodeStreak.urls'
@@ -186,6 +190,14 @@
 
 AUTH_PROFILE_MODULE = 'django_facebook.FacebookProfile'
 
+CACHES = {
+  'default': {
+    'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
+    'LOCATION': '127.0.0.1:11211',
+    'TIMEOUT': 30,
+  }
+}
+
 try:
   from local_settings import *
 except ImportError:

runserver

@@ -0,0 +1,22 @@
+# /bin/bash
+
+MEMCACHED_PORT=11211
+
+start_memcached()
+{
+  memcached -p $MEMCACHED_PORT &
+  MEMCACHED_PID=$!
+  echo "Starting memcached: pid=$MEMCACHED_PID"
+}
+
+kill_memcached()
+{
+  kill $MEMCACHED_PID 
+  echo "Killing memcached: pid=$MEMCACHED_PID"
+  exit $?
+}
+
+# trap kill_memcached SIGINT
+
+start_memcached 
+./manage.py runserver