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| 1 // Copyright 2009 Google Inc. | |
| 2 // | |
| 3 // Licensed under the Apache License, Version 2.0 (the "License"); | |
| 4 // you may not use this file except in compliance with the License. | |
| 5 // You may obtain a copy of the License at | |
| 6 // | |
| 7 // http://www.apache.org/licenses/LICENSE-2.0 | |
| 8 // | |
| 9 // Unless required by applicable law or agreed to in writing, software | |
| 10 // distributed under the License is distributed on an "AS IS" BASIS, | |
| 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 12 // See the License for the specific language governing permissions and | |
| 13 // limitations under the License. | |
| 14 // ======================================================================== | |
| 15 | |
| 16 #ifndef OMAHA_GOOPDATE_APP_STATE_ERROR_H_ | |
| 17 #define OMAHA_GOOPDATE_APP_STATE_ERROR_H_ | |
| 18 | |
| 19 #include "base/basictypes.h" | |
| 20 #include "omaha/goopdate/app_state.h" | |
| 21 | |
| 22 namespace omaha { | |
| 23 | |
| 24 namespace fsm { | |
| 25 | |
| 26 // The error state is idempotent. Further transitions from error state into | |
| 27 // itself are allowed but have no effect. Therefore, the first error wins. One | |
| 28 // scenario where this occurs is canceling the app. Canceling the app is not | |
| 29 // blocking and it moves the app in the error state right away. The Error | |
| 30 // method is called a second time, as the actual cancel code executes in the | |
| 31 // thread pool. | |
| 32 class AppStateError : public AppState { | |
| 33 public: | |
| 34 AppStateError(); | |
| 35 virtual ~AppStateError() {} | |
| 36 | |
| 37 virtual const PingEvent* CreatePingEvent(App* app, | |
| 38 CurrentState previous_state) const; | |
| 39 | |
| 40 // These calls are legal in this state but do nothing. This can occur when | |
| 41 // this app has encountered an error but bundle is still being processed. | |
| 42 // For instance, when cancelling a bundle during a download, the applications | |
| 43 // transition right away in the error state. The cancel event is handled at | |
| 44 // some point in the future. Depending on a race condition, the downloads may | |
| 45 // have succeeded or failed due to the cancellation. The race condition is | |
| 46 // resolved when the transition call reaches this object and the call is | |
| 47 // ignored. | |
| 48 virtual void DownloadComplete(App* app); | |
| 49 virtual void MarkReadyToInstall(App* app); | |
| 50 | |
| 51 // These calls are legal in this state but do nothing. This can occur when | |
| 52 // this app has encountered an error or has been canceled but bundle is still | |
| 53 // being processed. | |
| 54 virtual void PreUpdateCheck(App* app, xml::UpdateRequest* update_request); | |
| 55 virtual void PostUpdateCheck(App* app, | |
| 56 HRESULT result, | |
| 57 xml::UpdateResponse* update_response); | |
| 58 virtual void QueueDownload(App* app); | |
| 59 virtual void QueueDownloadOrInstall(App* app); | |
| 60 virtual void Download(App* app, DownloadManagerInterface* download_manager); | |
| 61 virtual void QueueInstall(App* app); | |
| 62 virtual void Install(App* app, InstallManagerInterface* install_manager); | |
| 63 | |
| 64 // Canceling while in a terminal state has no effect. | |
| 65 virtual void Cancel(App* app); | |
| 66 | |
| 67 virtual void Error(App* app, | |
| 68 const ErrorContext& error_context, | |
| 69 const CString& message); | |
| 70 | |
| 71 private: | |
| 72 DISALLOW_COPY_AND_ASSIGN(AppStateError); | |
| 73 }; | |
| 74 | |
| 75 } // namespace fsm | |
| 76 | |
| 77 } // namespace omaha | |
| 78 | |
| 79 #endif // OMAHA_GOOPDATE_APP_STATE_ERROR_H_ | |
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