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106 lines
4.2 KiB
C++
106 lines
4.2 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_ANDROID_NETWORK_CHANGE_NOTIFIER_ANDROID_H_
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#define NET_ANDROID_NETWORK_CHANGE_NOTIFIER_ANDROID_H_
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#include <memory>
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#include "base/android/jni_android.h"
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#include "base/compiler_specific.h"
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#include "base/macros.h"
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#include "net/android/network_change_notifier_delegate_android.h"
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#include "net/base/net_export.h"
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#include "net/base/network_change_notifier.h"
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namespace net {
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struct DnsConfig;
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class NetworkChangeNotifierAndroidTest;
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class NetworkChangeNotifierFactoryAndroid;
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// NetworkChangeNotifierAndroid observes network events from the Android
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// notification system and forwards them to observers.
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//
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// The implementation is complicated by the differing lifetime and thread
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// affinity requirements of Android notifications and of NetworkChangeNotifier.
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//
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// High-level overview:
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// NetworkChangeNotifier.java - Receives notifications from Android system, and
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// notifies native code via JNI (on the main application thread).
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// NetworkChangeNotifierDelegateAndroid ('Delegate') - Listens for notifications
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// sent via JNI on the main application thread, and forwards them to observers
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// on their threads. Owned by Factory, lives exclusively on main application
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// thread.
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// NetworkChangeNotifierFactoryAndroid ('Factory') - Creates the Delegate on the
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// main thread to receive JNI events, and vends Notifiers. Lives exclusively
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// on main application thread, and outlives all other classes.
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// NetworkChangeNotifierAndroid ('Notifier') - Receives event notifications from
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// the Delegate. Processes and forwards these events to the
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// NetworkChangeNotifier observers on their threads. May live on any thread
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// and be called by any thread.
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//
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// For more details, see the implementation file.
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class NET_EXPORT_PRIVATE NetworkChangeNotifierAndroid
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: public NetworkChangeNotifier,
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public NetworkChangeNotifierDelegateAndroid::Observer {
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public:
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~NetworkChangeNotifierAndroid() override;
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// NetworkChangeNotifier:
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ConnectionType GetCurrentConnectionType() const override;
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// Requires ACCESS_WIFI_STATE permission in order to provide precise WiFi link
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// speed.
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void GetCurrentMaxBandwidthAndConnectionType(
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double* max_bandwidth_mbps,
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ConnectionType* connection_type) const override;
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bool AreNetworkHandlesCurrentlySupported() const override;
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void GetCurrentConnectedNetworks(NetworkList* network_list) const override;
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ConnectionType GetCurrentNetworkConnectionType(
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NetworkHandle network) const override;
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NetworkChangeNotifier::ConnectionSubtype GetCurrentConnectionSubtype()
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const override;
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NetworkHandle GetCurrentDefaultNetwork() const override;
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// NetworkChangeNotifierDelegateAndroid::Observer:
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void OnConnectionTypeChanged() override;
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void OnMaxBandwidthChanged(double max_bandwidth_mbps,
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ConnectionType type) override;
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void OnNetworkConnected(NetworkHandle network) override;
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void OnNetworkSoonToDisconnect(NetworkHandle network) override;
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void OnNetworkDisconnected(NetworkHandle network) override;
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void OnNetworkMadeDefault(NetworkHandle network) override;
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// Promote GetMaxBandwidthMbpsForConnectionSubtype to public for the Android
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// delegate class.
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using NetworkChangeNotifier::GetMaxBandwidthMbpsForConnectionSubtype;
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protected:
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void OnFinalizingMetricsLogRecord() override;
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private:
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friend class NetworkChangeNotifierAndroidTest;
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friend class NetworkChangeNotifierFactoryAndroid;
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class DnsConfigServiceThread;
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// Enable NetworkHandles support for tests.
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void ForceNetworkHandlesSupportedForTesting();
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NetworkChangeNotifierAndroid(NetworkChangeNotifierDelegateAndroid* delegate,
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const DnsConfig* dns_config_for_testing);
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static NetworkChangeCalculatorParams NetworkChangeCalculatorParamsAndroid();
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NetworkChangeNotifierDelegateAndroid* const delegate_;
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std::unique_ptr<DnsConfigServiceThread> dns_config_service_thread_;
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bool force_network_handles_supported_for_testing_;
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DISALLOW_COPY_AND_ASSIGN(NetworkChangeNotifierAndroid);
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};
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} // namespace net
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#endif // NET_ANDROID_NETWORK_CHANGE_NOTIFIER_ANDROID_H_
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