components/sessions/base_session_service_delegate.h

   1 // Copyright 2014 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 COMPONENTS_SESSIONS_BASE_SESSION_SERVICE_DELEGATE_H_
   6 #define COMPONENTS_SESSIONS_BASE_SESSION_SERVICE_DELEGATE_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9
  10 namespace base {
  11 class SequencedWorkerPool;
  12 }
  13
  14 namespace sessions {
  15
  16 // The BaseSessionServiceDelegate decouples the BaseSessionService from
  17 // chrome/content dependencies.
  18 class BaseSessionServiceDelegate {
  19  public:
  20   BaseSessionServiceDelegate() {}
  21
  22   // Get the sequenced worker pool for running tasks on the backend thread as
  23   // long as the system is not shutting down.
  24   virtual base::SequencedWorkerPool* GetBlockingPool() = 0;
  25
  26   // Returns true if save operations can be performed as a delayed task - which
  27   // is usually only used by unit tests.
  28   virtual bool ShouldUseDelayedSave() = 0;
  29
  30   // Called when commands are about to be written to disc.
  31   virtual void OnWillSaveCommands() {}
  32
  33   // Called when commands were saved to disc.
  34   virtual void OnSavedCommands() {}
  35
  36  protected:
  37   virtual ~BaseSessionServiceDelegate() {}
  38 };
  39
  40 }  // namespace sessions
  41
  42 #endif  // COMPONENTS_SESSIONS_BASE_SESSION_SERVICE_DELEGATE_H_