Adapted ROC CMS to concurrent EWF.

Revisited the shared logger to reduced number of useless calls.

library/persistence/implementation/store/cms_storage_store_sql.e

@@ -32,6 +32,15 @@ feature -- Status report
 			Result := connection.is_connected
 		end
 
+feature -- Basic operation
+
+	close
+			-- <Precursor>
+			-- Disconnect from SQL database.
+		do
+			connection.disconnect
+		end
+
 feature {NONE} -- Implementation	
 
 	db_handler: DATABASE_HANDLER

library/persistence/sqlite/src/cms_storage_sqlite_builder.e

@@ -29,15 +29,25 @@ feature -- Factory
 	storage (a_setup: CMS_SETUP): detachable CMS_STORAGE_SQLITE
 		local
 			s: STRING
-			conn: DATABASE_CONNECTION
+			conn: detachable DATABASE_CONNECTION
 		do
-			if attached (create {APPLICATION_JSON_CONFIGURATION_HELPER}).new_database_configuration (a_setup.environment.application_config_path) as l_database_config then
+			if
+				attached (create {APPLICATION_JSON_CONFIGURATION_HELPER}).new_database_configuration (a_setup.environment.application_config_path) as l_database_config
+			then
 				s := "Driver=SQLite3 ODBC Driver;Database="
 				if attached l_database_config.database_name as db_name then
 					s.append (db_name)
 				end
 				s.append (";LongNames=0;Timeout=1000;NoTXN=0;SyncPragma=NORMAL;StepAPI=0;")
-				create {DATABASE_CONNECTION_ODBC} conn.login_with_connection_string (s)
+				if attached reuseable_connection.item as d then
+					if s.same_string (d.name) then
+						conn := d.connection
+					end
+				end
+				if conn = Void or else not conn.is_connected then
+					create {DATABASE_CONNECTION_ODBC} conn.login_with_connection_string (s)
+					reuseable_connection.replace ([s, conn])
+				end
 				if conn.is_connected then
 					create Result.make (conn)
 					set_map_zero_null_value (False)	--| This way we map 0 to 0, instead of Null as default.
@@ -50,4 +60,9 @@ feature -- Factory
 			end
 		end
 
+	reuseable_connection: CELL [detachable TUPLE [name: STRING; connection: DATABASE_CONNECTION]]
+		once
+			create Result.put (Void)
+		end
+
 end