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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 "base/android/jni_android.h"
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "net/android/network_change_notifier_delegate_android.h"
#include "net/base/network_change_notifier.h"
namespace net {
struct DnsConfig;
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.
class NET_EXPORT_PRIVATE NetworkChangeNotifierAndroid
: public NetworkChangeNotifier,
public NetworkChangeNotifierDelegateAndroid::Observer {
public:
~NetworkChangeNotifierAndroid() override;
// NetworkChangeNotifier:
ConnectionType GetCurrentConnectionType() const 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;
// NetworkChangeNotifierDelegateAndroid::Observer:
void OnConnectionTypeChanged() override;
void OnMaxBandwidthChanged(double max_bandwidth_mbps,
ConnectionType type) override;
static bool Register(JNIEnv* env);
// Promote GetMaxBandwidthForConnectionSubtype to public for the Android
// delegate class.
using NetworkChangeNotifier::GetMaxBandwidthForConnectionSubtype;
private:
friend class NetworkChangeNotifierAndroidTest;
friend class NetworkChangeNotifierFactoryAndroid;
class DnsConfigServiceThread;
NetworkChangeNotifierAndroid(NetworkChangeNotifierDelegateAndroid* delegate,
const DnsConfig* dns_config_for_testing);
static NetworkChangeCalculatorParams NetworkChangeCalculatorParamsAndroid();
NetworkChangeNotifierDelegateAndroid* const delegate_;
scoped_ptr<DnsConfigServiceThread> dns_config_service_thread_;
DISALLOW_COPY_AND_ASSIGN(NetworkChangeNotifierAndroid);
};
} // namespace net
#endif // NET_ANDROID_NETWORK_CHANGE_NOTIFIER_ANDROID_H_
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