clearCache now supports method_id argument to clear the cache of this CachingMethod only

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@6882 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Cache.py

@@ -147,8 +147,19 @@ class CachingMethod:
 
 allow_class(CachingMethod)
 
-def clearCache():
-  CachingMethod.cached_object_dict.clear()
+def clearCache(method_id=None):
+  """Clear the cache.
+  If method_id is specified, it clears the cache only for this method,
+  otherwise, it clears the whole cache."""
+  if method_id is None:
+    CachingMethod.cached_object_dict.clear()
+  else:
+    caching_method_keys = CachingMethod.cached_object_dict.keys()
+    for key in caching_method_keys :
+      # CachingMethod dict contains a string representation of a list
+      # of tuples keys.
+      if method_id in key :
+        del CachingMethod.cached_object_dict[key]
 
 # TransactionCache is a cache per transaction. The purpose of this cache is
 # to accelerate some heavy read-only operations. Note that this must not be

product/ERP5Type/tests/testERP5Type.py

@@ -200,8 +200,35 @@ class TestERP5Type(ERP5TypeTestCase):
       self.assertEquals(organisation.corporate_name,'Nexedi')
       self.assertEquals(organisation.default_telephone.corporate_name,'Toto')
 
-
-
+    def test_06_CachingMethod(self):
+      """Tests Caching methods."""
+      cached_var1 = cached_var1_orig = 'cached_var1'
+      cached_var2 = cached_var2_orig = 'cached_var2'
+
+      def _cache1():
+        return cached_var1
+      def _cache2():
+        return cached_var2
+      
+      from Products.ERP5Type.Cache import CachingMethod, clearCache
+      cache1 = CachingMethod(_cache1, id='_cache1')
+      cache2 = CachingMethod(_cache2, id='_cache2')
+      
+      self.assertEquals(cache1(), cached_var1)
+      self.assertEquals(cache2(), cached_var2)
+      
+      cached_var1 = 'cached_var1 (modified)'
+      cached_var2 = 'cached_var2 (modified)'
+      self.assertEquals(cache1(), cached_var1_orig)
+        
+      # clearCache with a method argument only clear this cache
+      clearCache(method_id = '_cache1')
+      self.assertEquals(cache1(), cached_var1)
+      self.assertEquals(cache2(), cached_var2_orig)
+      
+      # clearCache with no arguments clear all caches
+      clearCache()
+      self.assertEquals(cache2(), cached_var2)
 
 if __name__ == '__main__':
     framework()