Added initCacheStorage method which will init (if needed) cache backend...

Added initCacheStorage method which will init (if needed) cache backend storage when cache is updated

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@11204 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/CachePlugins/DistributedRamCache.py

@@ -53,6 +53,11 @@ class DistributedRamCache(BaseCache):
     self._last_cache_conn_creation_time = time()
     BaseCache.__init__(self)
     
+  def initCacheStorage(self):
+    """ Init cache storage """
+    ## cache storage is a memcached server and no need to init it
+    pass
+        
   def getCacheStorage(self):
     ## if we use one connection object this causes 
     ## "MemCached: while expecting 'STORED', got unexpected response 'END'"

product/ERP5Type/CachePlugins/RamCache.py

@@ -43,6 +43,11 @@ class RamCache(BaseCache):
   def __init__(self, params={}):
     BaseCache.__init__(self)
  
+  def initCacheStorage(self):
+    """ Init cache storage """
+    ## cache storage is a RAM based dictionary
+    pass
+    
   def getCacheStorage(self):
     return self._cache_dict
     

product/ERP5Type/CachePlugins/SQLCache.py

@@ -106,6 +106,8 @@ class SQLCache(BaseCache):
                                 WHERE scope="%s"
                             '''
                             
+  find_table_by_name_sql = """SHOW TABLES LIKE '%s' """
+  
   def __init__(self, params):
     BaseCache.__init__(self)
     self._dbConn = None
@@ -118,6 +120,18 @@ class SQLCache(BaseCache):
     ## since SQL cache is persistent check for expired objects
     #self.expireOldCacheEntries(forceCheck=True)
   
+  def initCacheStorage(self):
+    """ Init cache backedn storage by creating needed cache table in RDBMS """
+    sql_query = self.find_table_by_name_sql %self._db_cache_table_name
+    cursor =  self.execSQLQuery(sql_query)
+    result = cursor.fetchall()
+    if 0 < len(result):
+      ## we have such table
+      pass
+    else:
+      ## no such table create it
+      self.execSQLQuery(self.create_table_sql %self._db_cache_table_name) 
+  
   def getCacheStorage(self):
     """ 
     Return current DB connection or create a new one for this thread.
@@ -140,7 +154,6 @@ class SQLCache(BaseCache):
       ## we have already dbConn for this thread 
       return dbConn
     
-    
   def get(self, cache_id, scope, default=None):
     sql_query = self.get_key_sql %(self._db_cache_table_name, cache_id, scope)
     cursor =  self.execSQLQuery(sql_query)

product/ERP5Type/Tool/CacheTool.py

@@ -160,7 +160,6 @@ class CacheTool(BaseTool):
   security.declareProtected(Permissions.ModifyPortalContent, 'updateCache')
   def updateCache(self, REQUEST=None):
     """ Clear and update cache structure """
-    #erp5_site_id = self.getPortalObject().getId()
     for cf in CachingMethod.factories:
       for cp in CachingMethod.factories[cf].getCachePluginList():
         del cp
@@ -168,6 +167,9 @@ class CacheTool(BaseTool):
     ## read configuration from ZODB
     for key,item in self.getCacheFactoryList().items():
       if len(item['cache_plugins'])!=0:
+        ## init cache backend storages
+        for cp in item["cache_plugins"]:
+          cp.initCacheStorage()
         CachingMethod.factories[key] = CacheFactory(item['cache_plugins'], item['cache_params'])    
     if REQUEST is not None:
       self.REQUEST.RESPONSE.redirect('cache_tool_configure?portal_status_message=Cache updated.')