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| 1 // Copyright 2007-2010 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 | |
| 17 // Core uses a reactor design pattern to register event handlers for kernel | |
| 18 // events, demultiplex them, and transfer control to the respective event | |
| 19 // handlers. | |
| 20 | |
| 21 #ifndef OMAHA_CORE_CORE_H_ | |
| 22 #define OMAHA_CORE_CORE_H_ | |
| 23 | |
| 24 #include <atlbase.h> | |
| 25 #include <atlsecurity.h> | |
| 26 #include <atlstr.h> | |
| 27 #include <string> | |
| 28 #include "base/basictypes.h" | |
| 29 #include "base/scoped_ptr.h" | |
| 30 #include "omaha/base/scoped_any.h" | |
| 31 #include "omaha/base/shutdown_callback.h" | |
| 32 #include "omaha/core/google_update_core.h" | |
| 33 #include "omaha/core/system_monitor.h" | |
| 34 #include "omaha/goopdate/google_update3.h" | |
| 35 | |
| 36 namespace omaha { | |
| 37 | |
| 38 class Reactor; | |
| 39 class Scheduler; | |
| 40 class ShutdownHandler; | |
| 41 | |
| 42 // To support hosting ATL COM objects, Core derives from CAtlExeModuleT. Other | |
| 43 // than the ATL module count, no functionality of CAtlExeModuleT is used. | |
| 44 class Core | |
| 45 : public ShutdownCallback, | |
| 46 public SystemMonitorObserver, | |
| 47 public CAtlExeModuleT<Core> { | |
| 48 public: | |
| 49 Core(); | |
| 50 virtual ~Core(); | |
| 51 | |
| 52 // Executes the instance entry point with given parameters. | |
| 53 HRESULT Main(bool is_system, bool is_crash_handler_enabled); | |
| 54 | |
| 55 // Starts an update worker process if the Core is meant to run all the time. | |
| 56 // If not, causes the Core to exit the process. | |
| 57 HRESULT StartUpdateWorker() const; | |
| 58 | |
| 59 // Starts a code red process. | |
| 60 HRESULT StartCodeRed() const; | |
| 61 | |
| 62 // Starts the crash handler. | |
| 63 HRESULT StartCrashHandler() const; | |
| 64 | |
| 65 // Aggregates the core metrics. | |
| 66 void AggregateMetrics() const; | |
| 67 | |
| 68 Reactor* reactor() const { return reactor_.get(); } | |
| 69 bool is_system() const { return is_system_; } | |
| 70 | |
| 71 virtual LONG Unlock() throw() { | |
| 72 // We are long-running independent of the ATL module count, therefore | |
| 73 // transition to zero does not by itself unload the process. | |
| 74 return CAtlModuleT<Core>::Unlock(); | |
| 75 } | |
| 76 | |
| 77 private: | |
| 78 | |
| 79 HRESULT DoMain(bool is_system, bool is_crash_handler_enabled); | |
| 80 | |
| 81 // Starts an update worker process. | |
| 82 HRESULT StartUpdateWorkerInternal() const; | |
| 83 | |
| 84 bool AreScheduledTasksHealthy() const; | |
| 85 bool IsServiceHealthy() const; | |
| 86 bool IsCheckingForUpdates() const; | |
| 87 bool ShouldRunForever() const; | |
| 88 | |
| 89 // ShutdownCallback interface. | |
| 90 // Signals the core to stop handling events and exit. | |
| 91 virtual HRESULT Shutdown(); | |
| 92 virtual HRESULT ShutdownInternal() const; | |
| 93 | |
| 94 // SystemMonitorObserver interface. | |
| 95 virtual void LastCheckedDeleted(); | |
| 96 virtual void NoRegisteredClients(); | |
| 97 | |
| 98 HRESULT DoRun(); | |
| 99 HRESULT DoHandleEvents(); | |
| 100 | |
| 101 // Collects ambient core metrics. | |
| 102 void CollectMetrics()const; | |
| 103 | |
| 104 bool is_system_; | |
| 105 | |
| 106 // True if the core has to kickoff the crash handler. | |
| 107 bool is_crash_handler_enabled_; | |
| 108 | |
| 109 DWORD main_thread_id_; // The id of the thread that runs Core::Main. | |
| 110 | |
| 111 scoped_ptr<Reactor> reactor_; | |
| 112 scoped_ptr<ShutdownHandler> shutdown_handler_; | |
| 113 scoped_ptr<Scheduler> scheduler_; | |
| 114 scoped_ptr<SystemMonitor> system_monitor_; | |
| 115 | |
| 116 friend class CoreUtilsTest; | |
| 117 | |
| 118 DISALLOW_EVIL_CONSTRUCTORS(Core); | |
| 119 }; | |
| 120 | |
| 121 } // namespace omaha | |
| 122 | |
| 123 #endif // OMAHA_CORE_CORE_H_ | |
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