1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CHROME_BROWSER_SYNC_ENGINE_SYNCER_COMMAND_H_ 6 #define CHROME_BROWSER_SYNC_ENGINE_SYNCER_COMMAND_H_ 7 #pragma once 8 9 #include "base/basictypes.h" 10 11 namespace browser_sync { 12 13 namespace sessions { 14 class SyncSession; 15 } 16 17 // Implementation of a simple command pattern intended to be driven by the 18 // Syncer. SyncerCommand is abstract and all subclasses must implement 19 // ExecuteImpl(). This is done so that chunks of syncer operation can be unit 20 // tested. 21 // 22 // Example Usage: 23 // 24 // SyncSession session = ...; 25 // SyncerCommand *cmd = SomeCommandFactory.createCommand(...); 26 // cmd->Execute(session); 27 // delete cmd; 28 29 class SyncerCommand { 30 public: 31 SyncerCommand(); 32 virtual ~SyncerCommand(); 33 34 // Execute dispatches to a derived class's ExecuteImpl. 35 void Execute(sessions::SyncSession* session); 36 37 // ExecuteImpl is where derived classes actually do work. 38 virtual void ExecuteImpl(sessions::SyncSession* session) = 0; 39 private: 40 void SendNotifications(sessions::SyncSession* session); 41 DISALLOW_COPY_AND_ASSIGN(SyncerCommand); 42 }; 43 44 } // namespace browser_sync 45 46 #endif // CHROME_BROWSER_SYNC_ENGINE_SYNCER_COMMAND_H_ 47
