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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CHROME_INSTALLER_UTIL_WORK_ITEM_LIST_H_ | 5 #ifndef CHROME_INSTALLER_UTIL_WORK_ITEM_LIST_H_ |
6 #define CHROME_INSTALLER_UTIL_WORK_ITEM_LIST_H_ | 6 #define CHROME_INSTALLER_UTIL_WORK_ITEM_LIST_H_ |
7 | 7 |
8 #include <windows.h> | 8 #include <windows.h> |
9 | 9 |
10 #include <list> | 10 #include <list> |
11 #include <string> | 11 #include <string> |
12 #include <vector> | 12 #include <vector> |
13 | 13 |
14 #include "base/callback_forward.h" | 14 #include "base/callback_forward.h" |
15 #include "base/memory/scoped_ptr.h" | 15 #include "base/memory/scoped_ptr.h" |
16 #include "chrome/installer/util/work_item.h" | 16 #include "chrome/installer/util/work_item.h" |
17 | 17 |
18 namespace base { | 18 namespace base { |
19 class FilePath; | 19 class FilePath; |
20 } | 20 } |
21 | 21 |
22 // A WorkItem subclass that recursively contains a list of WorkItems. Thus it | 22 // A WorkItem subclass that recursively contains a list of WorkItems. Thus it |
23 // provides functionalities to carry out or roll back the sequence of actions | 23 // provides functionalities to carry out or roll back the sequence of actions |
24 // defined by the list of WorkItems it contains. | 24 // defined by the list of WorkItems it contains. |
25 // The WorkItems are executed in the same order as they are added to the list. | 25 // The WorkItems are executed in the same order as they are added to the list. |
26 class WorkItemList : public WorkItem { | 26 class WorkItemList : public WorkItem { |
27 public: | 27 public: |
28 virtual ~WorkItemList(); | 28 ~WorkItemList() override; |
29 | 29 |
30 // Execute the WorkItems in the same order as they are added to the list. | 30 // Execute the WorkItems in the same order as they are added to the list. |
31 // It aborts as soon as one WorkItem fails. | 31 // It aborts as soon as one WorkItem fails. |
32 virtual bool Do(); | 32 bool Do() override; |
33 | 33 |
34 // Rollback the WorkItems in the reverse order as they are executed. | 34 // Rollback the WorkItems in the reverse order as they are executed. |
35 virtual void Rollback(); | 35 void Rollback() override; |
36 | 36 |
37 // Add a WorkItem to the list. | 37 // Add a WorkItem to the list. |
38 // A WorkItem can only be added to the list before the list's DO() is called. | 38 // A WorkItem can only be added to the list before the list's DO() is called. |
39 // Once a WorkItem is added to the list. The list owns the WorkItem. | 39 // Once a WorkItem is added to the list. The list owns the WorkItem. |
40 virtual void AddWorkItem(WorkItem* work_item); | 40 virtual void AddWorkItem(WorkItem* work_item); |
41 | 41 |
42 // Add a CallbackWorkItem that invokes a callback. | 42 // Add a CallbackWorkItem that invokes a callback. |
43 virtual WorkItem* AddCallbackWorkItem( | 43 virtual WorkItem* AddCallbackWorkItem( |
44 base::Callback<bool(const CallbackWorkItem&)> callback); | 44 base::Callback<bool(const CallbackWorkItem&)> callback); |
45 | 45 |
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153 // executed. | 153 // executed. |
154 WorkItems executed_list_; | 154 WorkItems executed_list_; |
155 }; | 155 }; |
156 | 156 |
157 // A specialization of WorkItemList that executes items in the list on a | 157 // A specialization of WorkItemList that executes items in the list on a |
158 // best-effort basis. Failure of individual items to execute does not prevent | 158 // best-effort basis. Failure of individual items to execute does not prevent |
159 // subsequent items from being executed. | 159 // subsequent items from being executed. |
160 // Also, as the class name suggests, Rollback is not possible. | 160 // Also, as the class name suggests, Rollback is not possible. |
161 class NoRollbackWorkItemList : public WorkItemList { | 161 class NoRollbackWorkItemList : public WorkItemList { |
162 public: | 162 public: |
163 virtual ~NoRollbackWorkItemList(); | 163 ~NoRollbackWorkItemList() override; |
164 | 164 |
165 // Execute the WorkItems in the same order as they are added to the list. | 165 // Execute the WorkItems in the same order as they are added to the list. |
166 // If a WorkItem fails, the function will return failure but all other | 166 // If a WorkItem fails, the function will return failure but all other |
167 // WorkItems will still be executed. | 167 // WorkItems will still be executed. |
168 virtual bool Do(); | 168 bool Do() override; |
169 | 169 |
170 // No-op. | 170 // No-op. |
171 virtual void Rollback(); | 171 void Rollback() override; |
172 }; | 172 }; |
173 | 173 |
174 #endif // CHROME_INSTALLER_UTIL_WORK_ITEM_LIST_H_ | 174 #endif // CHROME_INSTALLER_UTIL_WORK_ITEM_LIST_H_ |
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