[Erp5-report] r34251 jm - /erp5/trunk/products/ERP5Type/Cache.py

[nobody at svn.erp5.org]

Author: jm
Date: Thu Apr  1 19:58:39 2010
New Revision: 34251

URL: http://svn.erp5.org?rev=34251&view=rev
Log:
Add a decorator to use transactional cache

Modified:
    erp5/trunk/products/ERP5Type/Cache.py

Modified: erp5/trunk/products/ERP5Type/Cache.py
URL: http://svn.erp5.org/erp5/trunk/products/ERP5Type/Cache.py?rev=34251&r1=34250&r2=34251&view=diff
==============================================================================
--- erp5/trunk/products/ERP5Type/Cache.py [utf8] (original)
+++ erp5/trunk/products/ERP5Type/Cache.py [utf8] Thu Apr  1 19:58:39 2010
@@ -291,3 +291,19 @@
     # which the method is called would not be passed as first parameter.
     return lambda *args, **kw: caching_method(*args, **kw)
   return wrapped
+
+def transactional_cached(key_method=lambda *args: args):
+  def decorator(function):
+    key = repr(function)
+    def wrapper(*args, **kw):
+      cache = getTransactionalVariable(None).setdefault(key, {})
+      subkey = key_method(*args, **kw)
+      try:
+        return cache[subkey]
+      except KeyError:
+        cache[subkey] = result = function(*args, **kw)
+        return result
+    wrapper.__doc__ = function.__doc__
+    wrapper.__name__ = function.__name__
+    return wrapper
+  return decorator