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- // Copyright (c) 2012 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #ifndef NET_ANDROID_NETWORK_CHANGE_NOTIFIER_ANDROID_H_
- #define NET_ANDROID_NETWORK_CHANGE_NOTIFIER_ANDROID_H_
- #include <memory>
- #include "base/android/jni_android.h"
- #include "base/compiler_specific.h"
- #include "base/memory/raw_ptr.h"
- #include "base/memory/scoped_refptr.h"
- #include "net/android/network_change_notifier_delegate_android.h"
- #include "net/base/net_export.h"
- #include "net/base/network_change_notifier.h"
- #include "net/base/network_handle.h"
- namespace base {
- struct OnTaskRunnerDeleter;
- } // namespace base
- namespace net {
- class NetworkChangeNotifierAndroidTest;
- class NetworkChangeNotifierFactoryAndroid;
- // NetworkChangeNotifierAndroid observes network events from the Android
- // notification system and forwards them to observers.
- //
- // The implementation is complicated by the differing lifetime and thread
- // affinity requirements of Android notifications and of NetworkChangeNotifier.
- //
- // High-level overview:
- // NetworkChangeNotifier.java - Receives notifications from Android system, and
- // notifies native code via JNI (on the main application thread).
- // NetworkChangeNotifierDelegateAndroid ('Delegate') - Listens for notifications
- // sent via JNI on the main application thread, and forwards them to observers
- // on their threads. Owned by Factory, lives exclusively on main application
- // thread.
- // NetworkChangeNotifierFactoryAndroid ('Factory') - Creates the Delegate on the
- // main thread to receive JNI events, and vends Notifiers. Lives exclusively
- // on main application thread, and outlives all other classes.
- // NetworkChangeNotifierAndroid ('Notifier') - Receives event notifications from
- // the Delegate. Processes and forwards these events to the
- // NetworkChangeNotifier observers on their threads. May live on any thread
- // and be called by any thread.
- //
- // For more details, see the implementation file.
- //
- // Note: Alongside of NetworkChangeNotifier.java there is
- // NetworkActiveNotifier.java, which handles notifications for when the system
- // default network goes in to a high power state. These are handled separately
- // since listening to them is expensive (they are fired often) and currently
- // only bidi streams connection status check uses them.
- class NET_EXPORT_PRIVATE NetworkChangeNotifierAndroid
- : public NetworkChangeNotifier,
- public NetworkChangeNotifierDelegateAndroid::Observer {
- public:
- NetworkChangeNotifierAndroid(const NetworkChangeNotifierAndroid&) = delete;
- NetworkChangeNotifierAndroid& operator=(const NetworkChangeNotifierAndroid&) =
- delete;
- ~NetworkChangeNotifierAndroid() override;
- // NetworkChangeNotifier:
- ConnectionType GetCurrentConnectionType() const override;
- ConnectionCost GetCurrentConnectionCost() override;
- // Requires ACCESS_WIFI_STATE permission in order to provide precise WiFi link
- // speed.
- void GetCurrentMaxBandwidthAndConnectionType(
- double* max_bandwidth_mbps,
- ConnectionType* connection_type) const override;
- bool AreNetworkHandlesCurrentlySupported() const override;
- void GetCurrentConnectedNetworks(NetworkList* network_list) const override;
- ConnectionType GetCurrentNetworkConnectionType(
- handles::NetworkHandle network) const override;
- NetworkChangeNotifier::ConnectionSubtype GetCurrentConnectionSubtype()
- const override;
- handles::NetworkHandle GetCurrentDefaultNetwork() const override;
- bool IsDefaultNetworkActiveInternal() override;
- // NetworkChangeNotifierDelegateAndroid::Observer:
- void OnConnectionTypeChanged() override;
- void OnConnectionCostChanged() override;
- void OnMaxBandwidthChanged(double max_bandwidth_mbps,
- ConnectionType type) override;
- void OnNetworkConnected(handles::NetworkHandle network) override;
- void OnNetworkSoonToDisconnect(handles::NetworkHandle network) override;
- void OnNetworkDisconnected(handles::NetworkHandle network) override;
- void OnNetworkMadeDefault(handles::NetworkHandle network) override;
- void OnDefaultNetworkActive() override;
- // Promote GetMaxBandwidthMbpsForConnectionSubtype to public for the Android
- // delegate class.
- using NetworkChangeNotifier::GetMaxBandwidthMbpsForConnectionSubtype;
- static NetworkChangeCalculatorParams NetworkChangeCalculatorParamsAndroid();
- void DefaultNetworkActiveObserverAdded() override;
- void DefaultNetworkActiveObserverRemoved() override;
- private:
- friend class NetworkChangeNotifierAndroidTest;
- friend class NetworkChangeNotifierFactoryAndroid;
- class BlockingThreadObjects;
- // Enable handles::NetworkHandles support for tests.
- void ForceNetworkHandlesSupportedForTesting();
- explicit NetworkChangeNotifierAndroid(
- NetworkChangeNotifierDelegateAndroid* delegate);
- const raw_ptr<NetworkChangeNotifierDelegateAndroid> delegate_;
- // A collection of objects that must live on blocking sequences. These objects
- // listen for notifications and relay the notifications to the registered
- // observers without posting back to the thread the object was created on.
- // Also used for DnsConfigService which also must live on blocking sequences.
- std::unique_ptr<BlockingThreadObjects, base::OnTaskRunnerDeleter>
- blocking_thread_objects_;
- bool force_network_handles_supported_for_testing_ = false;
- };
- } // namespace net
- #endif // NET_ANDROID_NETWORK_CHANGE_NOTIFIER_ANDROID_H_
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