omaha_response_handler_action.h revision 6a5b3229b44c1f81ee153829e9b501e547f29926 
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 CHROMEOS_PLATFORM_UPDATE_ENGINE_OMAHA_RESPONSE_HANDLER_ACTION_H__
6#define CHROMEOS_PLATFORM_UPDATE_ENGINE_OMAHA_RESPONSE_HANDLER_ACTION_H__
7
8#include <string>
9#include "update_engine/action.h"
10#include "update_engine/install_plan.h"
11#include "update_engine/omaha_request_action.h"
12
13// This class reads in an Omaha response and converts what it sees into
14// an install plan which is passed out.
15
16namespace chromeos_update_engine {
17
18class OmahaResponseHandlerAction;
19
20template<>
21class ActionTraits<OmahaResponseHandlerAction> {
22 public:
23  typedef OmahaResponse InputObjectType;
24  typedef InstallPlan OutputObjectType;
25};
26
27class OmahaResponseHandlerAction : public Action<OmahaResponseHandlerAction> {
28 public:
29  OmahaResponseHandlerAction() : got_no_update_response_(false) {}
30  typedef ActionTraits<OmahaResponseHandlerAction>::InputObjectType
31      InputObjectType;
32  typedef ActionTraits<OmahaResponseHandlerAction>::OutputObjectType
33      OutputObjectType;
34  void PerformAction();
35
36  // This is a synchronous action, and thus TerminateProcessing() should
37  // never be called
38  void TerminateProcessing() { CHECK(false); }
39
40  // For unit-testing
41  void set_boot_device(const std::string& boot_device) {
42    boot_device_ = boot_device;
43  }
44
45  bool GotNoUpdateResponse() const { return got_no_update_response_; }
46  const InstallPlan& install_plan() const { return install_plan_; }
47
48  // Debugging/logging
49  static std::string StaticType() { return "OmahaResponseHandlerAction"; }
50  std::string Type() const { return StaticType(); }
51
52 private:
53  // Assumes you want to install on the "other" device, where the other
54  // device is what you get if you swap 1 for 2 or 3 for 4 or vice versa
55  // for the number at the end of the boot device. E.g., /dev/sda1 -> /dev/sda2
56  // or /dev/sda4 -> /dev/sda3
57  static bool GetInstallDev(const std::string& boot_dev,
58                            std::string* install_dev);
59
60  // set to non-empty in unit tests
61  std::string boot_device_;
62
63  // The install plan, if we have an update.
64  InstallPlan install_plan_;
65
66  // True only if we got a response and the response said no updates
67  bool got_no_update_response_;
68
69  DISALLOW_COPY_AND_ASSIGN(OmahaResponseHandlerAction);
70};
71
72}  // namespace chromeos_update_engine
73
74#endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_OMAHA_RESPONSE_HANDLER_ACTION_H__
75