components/update_client/task_update.h

   1 // Copyright 2015 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_UPDATE_CLIENT_TASK_UPDATE_H_
   6 #define COMPONENTS_UPDATE_CLIENT_TASK_UPDATE_H_
   7
   8 #include <queue>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/callback.h"
  13 #include "base/macros.h"
  14 #include "base/threading/thread_checker.h"
  15 #include "components/update_client/task.h"
  16 #include "components/update_client/update_client.h"
  17
  18 namespace update_client {
  19
  20 class UpdateEngine;
  21
  22 // Defines a specialized task for updating a group of CRXs.
  23 class TaskUpdate : public Task {
  24  public:
  25   using Callback = base::Callback<void(Task* task, int error)>;
  26
  27   // |update_engine| is injected here to handle the task.
  28   // |is_foreground| is true when the update task is initiated by the user,
  29   //    most likely as a result of an on-demand call.
  30   // |ids| represents the CRXs to be updated by this task.
  31   // |crx_data_callback| is called to get update data for the these CRXs.
  32   // |callback| is called to return the execution flow back to creator of
  33   //    this task when the task is done.
  34   TaskUpdate(UpdateEngine* update_engine,
  35              bool is_foreground,
  36              const std::vector<std::string>& ids,
  37              const UpdateClient::CrxDataCallback& crx_data_callback,
  38              const Callback& callback);
  39   ~TaskUpdate() override;
  40
  41   void Run() override;
  42
  43  private:
  44   // Called when the Run function associated with this task has completed.
  45   void RunComplete(int error);
  46
  47   base::ThreadChecker thread_checker_;
  48
  49   UpdateEngine* update_engine_;  // Not owned by this class.
  50
  51   const bool is_foreground_;
  52   const std::vector<std::string> ids_;
  53   const UpdateClient::CrxDataCallback crx_data_callback_;
  54   const Callback callback_;
  55
  56   DISALLOW_COPY_AND_ASSIGN(TaskUpdate);
  57 };
  58
  59 }  // namespace update_client
  60
  61 #endif  // COMPONENTS_UPDATE_CLIENT_TASK_UPDATE_H_