Create network change notifier.

webrtc/base/networkchangenotifier.cc

+/*
+ *  Copyright 2015 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/base/networkchangenotifier.h"
+
+#include "webrtc/base/common.h"
+
+namespace {
+rtc::NetworkChangeNotifierFactory* network_change_notifier_factory = nullptr;

[pthatcher1, 2015/10/09 23:11:29]

Can we create the Java object from C++ and avoid needing a global variable? 

[honghaiz3, 2015/10/13 23:19:56]

Now we create the Java object from c++. 
I still keep this factory to make it easier to inject a different factory in the
unittest and so that when creating the monitor here, it need not access the
namespace webrtc_jni. 

+}
+
+namespace rtc {
+
+NetworkChangeNotifierFactory* NetworkChangeNotifierFactory::CreateFactory() {
+  return new NetworkChangeNotifierFactory();
+}
+
+NetworkChangeNotifierDelegate* NetworkChangeNotifierFactory::CreateDelegate() {
+  delegate_.reset(new NetworkChangeNotifierDelegate());
+  return delegate_.get();
+}
+
+NetworkChangeNotifierDelegate* NetworkChangeNotifierFactory::GetDelegate() {
+  return delegate_.get();
+}
+
+NetworkChangeNotifier* NetworkChangeNotifierFactory::CreateNotifier() {
+  if (!GetDelegate()) {
+    return nullptr;
+  }
+  return new NetworkChangeNotifier(GetDelegate());
+}
+
+void NetworkChangeNotifierDelegate::OnNetworkChangeNotified() {
+  LOG(LS_VERBOSE) << "Network change is notified at the delegate";
+  SignalNetworksChanged();
+}
+
+void NetworkChangeNotifier::SetFactory(NetworkChangeNotifierFactory* factory) {
+  network_change_notifier_factory = factory;
+}
+
+NetworkChangeNotifierFactory* NetworkChangeNotifier::GetFactory() {
+  return network_change_notifier_factory;
+}
+
+NetworkChangeNotifier::NetworkChangeNotifier(
+    NetworkChangeNotifierDelegate* delegate) {
+  ASSERT(delegate != nullptr);
+  delegate_ = delegate;
+  delegate_->SignalNetworksChanged.connect(
+      this, &NetworkChangeNotifier::OnNetworkChangeNotified);
+}
+
+}  // namespace rtc