1 // Copyright (c) 2012 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 NET_ANDROID_NETWORK_CHANGE_NOTIFIER_ANDROID_H_ 6 #define NET_ANDROID_NETWORK_CHANGE_NOTIFIER_ANDROID_H_ 7 8 #include "base/android/jni_android.h" 9 #include "base/basictypes.h" 10 #include "base/compiler_specific.h" 11 #include "net/android/network_change_notifier_delegate_android.h" 12 #include "net/base/network_change_notifier.h" 13 14 namespace net { 15 16 class NetworkChangeNotifierAndroidTest; 17 class NetworkChangeNotifierFactoryAndroid; 18 19 // NetworkChangeNotifierAndroid observes network events from the Android 20 // notification system and forwards them to observers. 21 // 22 // The implementation is complicated by the differing lifetime and thread 23 // affinity requirements of Android notifications and of NetworkChangeNotifier. 24 // 25 // High-level overview: 26 // NetworkChangeNotifier.java - Receives notifications from Android system, and 27 // notifies native code via JNI (on the main application thread). 28 // NetworkChangeNotifierDelegateAndroid ('Delegate') - Listens for notifications 29 // sent via JNI on the main application thread, and forwards them to observers 30 // on their threads. Owned by Factory, lives exclusively on main application 31 // thread. 32 // NetworkChangeNotifierFactoryAndroid ('Factory') - Creates the Delegate on the 33 // main thread to receive JNI events, and vends Notifiers. Lives exclusively 34 // on main application thread, and outlives all other classes. 35 // NetworkChangeNotifierAndroid ('Notifier') - Receives event notifications from 36 // the Delegate. Processes and forwards these events to the 37 // NetworkChangeNotifier observers on their threads. May live on any thread 38 // and be called by any thread. 39 // 40 // For more details, see the implementation file. 41 class NET_EXPORT_PRIVATE NetworkChangeNotifierAndroid 42 : public NetworkChangeNotifier, 43 public NetworkChangeNotifierDelegateAndroid::Observer { 44 public: 45 virtual ~NetworkChangeNotifierAndroid(); 46 47 // NetworkChangeNotifier: 48 virtual ConnectionType GetCurrentConnectionType() const OVERRIDE; 49 50 // NetworkChangeNotifierDelegateAndroid::Observer: 51 virtual void OnConnectionTypeChanged() OVERRIDE; 52 53 static bool Register(JNIEnv* env); 54 55 private: 56 friend class NetworkChangeNotifierAndroidTest; 57 friend class NetworkChangeNotifierFactoryAndroid; 58 59 class DnsConfigServiceThread; 60 61 explicit NetworkChangeNotifierAndroid( 62 NetworkChangeNotifierDelegateAndroid* delegate); 63 64 static NetworkChangeCalculatorParams NetworkChangeCalculatorParamsAndroid(); 65 66 NetworkChangeNotifierDelegateAndroid* const delegate_; 67 scoped_ptr<DnsConfigServiceThread> dns_config_service_thread_; 68 69 DISALLOW_COPY_AND_ASSIGN(NetworkChangeNotifierAndroid); 70 }; 71 72 } // namespace net 73 74 #endif // NET_ANDROID_NETWORK_CHANGE_NOTIFIER_ANDROID_H_ 75