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// Copyright 2015 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 CHROME_BROWSER_ANDROID_NET_EXTERNAL_ESTIMATE_PROVIDER_ANDROID_H_
#define CHROME_BROWSER_ANDROID_NET_EXTERNAL_ESTIMATE_PROVIDER_ANDROID_H_
#include <jni.h>
#include <stdint.h>
#include "base/android/scoped_java_ref.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/thread_task_runner_handle.h"
#include "base/threading/thread_checker.h"
#include "base/time/time.h"
#include "net/base/external_estimate_provider.h"
#include "net/base/network_change_notifier.h"
namespace chrome {
namespace android {
// Native class that calls Java code exposed by
// ExternalEstimateProviderAndroidHelper.java. Provides network quality
// estimates as provided by Android. Estimates are automatically updated on a
// network change event.
class ExternalEstimateProviderAndroid
: public net::NetworkChangeNotifier::ConnectionTypeObserver,
public net::ExternalEstimateProvider {
public:
// Constructs and initializes the underlying provider.
ExternalEstimateProviderAndroid();
~ExternalEstimateProviderAndroid() override;
// net::ExternalEstimateProvider implementation.
bool GetRTT(base::TimeDelta* rtt) const override;
// net::ExternalEstimateProvider implementation.
bool GetDownstreamThroughputKbps(
int32_t* downstream_throughput_kbps) const override;
// net::ExternalEstimateProvider implementation.
bool GetUpstreamThroughputKbps(
int32_t* upstream_throughput_kbps) const override;
// net::ExternalEstimateProvider implementation.
bool GetTimeSinceLastUpdate(
base::TimeDelta* time_since_last_update) const override;
// NetworkChangeNotifier::ConnectionTypeObserver implementation.
void OnConnectionTypeChanged(
net::NetworkChangeNotifier::ConnectionType type) override;
// net::ExternalEstimateProvider implementation.
void SetUpdatedEstimateDelegate(
net::ExternalEstimateProvider::UpdatedEstimateDelegate* delegate)
override;
// Called by Java when the external estimate provider has an updated value.
// This may be called on a thread different from |task_runner_|.
void NotifyExternalEstimateProviderAndroidUpdate(JNIEnv* env, jobject obj);
protected:
// Notifies the delegate that a new update to external estimate is available.
// Protected for testing.
void NotifyUpdatedEstimateAvailable() const;
private:
// Places a requests to the provider to update the network quality. Returns
// true if the request was placed successfully.
void RequestUpdate() const;
// Value returned if valid value is unavailable.
int32_t no_value_ = -1;
base::android::ScopedJavaGlobalRef<jobject> j_external_estimate_provider_;
// Task runner that accesses ExternalEstimateProviderAndroid members.
scoped_refptr<base::TaskRunner> task_runner_;
// Notified every time there is an update available from the network quality
// provider.
// TODO(tbansal): Add the function that is called by Java side when an update
// is available.
net::ExternalEstimateProvider::UpdatedEstimateDelegate* delegate_;
base::ThreadChecker thread_checker_;
// Used for posting tasks.
base::WeakPtrFactory<ExternalEstimateProviderAndroid> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(ExternalEstimateProviderAndroid);
};
bool RegisterExternalEstimateProviderAndroid(JNIEnv* env);
} // namespace android
} // namespace chrome
#endif // CHROME_BROWSER_ANDROID_NET_EXTERNAL_ESTIMATE_PROVIDER_ANDROID_H_
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