Reporting of policy errors via host-offline-reason: part 3

remoting/host/remoting_me2me_host.cc

Index: remoting/host/remoting_me2me_host.cc
diff --git a/remoting/host/remoting_me2me_host.cc b/remoting/host/remoting_me2me_host.cc
index f2aa98331acea8f1f8076cf4540bed9a2c5220c0..73e59630ddafd0e7ca7f9e8a2df405d64da86b9e 100644
--- a/remoting/host/remoting_me2me_host.cc
+++ b/remoting/host/remoting_me2me_host.cc
@@ -14,6 +14,7 @@
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
@@ -26,7 +27,6 @@
 #include "ipc/ipc_channel_proxy.h"
 #include "ipc/ipc_listener.h"
 #include "media/base/media.h"
-#include "net/base/network_change_notifier.h"
 #include "net/socket/client_socket_factory.h"
 #include "net/socket/ssl_server_socket.h"
 #include "net/url_request/url_fetcher.h"
@@ -45,8 +45,6 @@
 #include "remoting/host/config_watcher.h"
 #include "remoting/host/desktop_environment.h"
 #include "remoting/host/desktop_session_connector.h"
-#include "remoting/host/dns_blackhole_checker.h"
-#include "remoting/host/heartbeat_sender.h"
 #include "remoting/host/host_change_notification_listener.h"
 #include "remoting/host/host_config.h"
 #include "remoting/host/host_event_logger.h"
@@ -58,10 +56,10 @@
 #include "remoting/host/ipc_host_event_logger.h"
 #include "remoting/host/logging.h"
 #include "remoting/host/me2me_desktop_environment.h"
+#include "remoting/host/minimum_heartbeat_supporter.h"
 #include "remoting/host/pairing_registry_delegate.h"
 #include "remoting/host/policy_hack/policy_watcher.h"
 #include "remoting/host/session_manager_factory.h"
-#include "remoting/host/signaling_connector.h"
 #include "remoting/host/single_window_desktop_environment.h"
 #include "remoting/host/token_validator_factory_impl.h"
 #include "remoting/host/usage_stats_consent.h"
@@ -240,6 +238,8 @@ class HostProcess
   bool OnPairingPolicyUpdate(base::DictionaryValue* policies);
   bool OnGnubbyAuthPolicyUpdate(base::DictionaryValue* policies);
 
+  scoped_refptr<MinimumHeartbeatSupporter> CreateMinimumHeartbeatSupporter();
+
   void StartHost();
 
   void OnHeartbeatSuccessful();
@@ -252,8 +252,6 @@ class HostProcess
   // Stops the host and shuts down the process with the specified |exit_code|.
   void ShutdownHost(HostExitCodes exit_code);
 
-  void ScheduleHostShutdown();
-
   void ShutdownOnNetworkThread();
 
   void OnPolicyWatcherShutdown();
@@ -267,9 +265,6 @@ class HostProcess
 
   scoped_ptr<ChromotingHostContext> context_;
 
-  // Created on the UI thread but used from the network thread.
-  scoped_ptr<net::NetworkChangeNotifier> network_change_notifier_;
-
   // Accessed on the UI thread.
   scoped_ptr<IPC::ChannelProxy> daemon_channel_;
 
@@ -319,10 +314,7 @@ class HostProcess
   // Used to specify which window to stream, if enabled.
   webrtc::WindowId window_id_;
 
-  scoped_ptr<OAuthTokenGetter> oauth_token_getter_;
-  scoped_ptr<XmppSignalStrategy> signal_strategy_;
-  scoped_ptr<SignalingConnector> signaling_connector_;
-  scoped_ptr<HeartbeatSender> heartbeat_sender_;
+  scoped_refptr<MinimumHeartbeatSupporter> minimum_heartbeat_supporter_;
   scoped_ptr<HostChangeNotificationListener> host_change_notification_listener_;
   scoped_ptr<HostStatusLogger> host_status_logger_;
   scoped_ptr<HostEventLogger> host_event_logger_;
@@ -340,6 +332,7 @@ class HostProcess
   bool signal_parent_;
 
   scoped_ptr<PairingRegistry::Delegate> pairing_registry_delegate_;
+  base::WeakPtrFactory<HostProcess> weak_factory_for_network_task_runner_;
 };
 
 HostProcess::HostProcess(scoped_ptr<ChromotingHostContext> context,
@@ -364,7 +357,8 @@ HostProcess::HostProcess(scoped_ptr<ChromotingHostContext> context,
 #endif  // defined(REMOTING_MULTI_PROCESS)
       self_(this),
       exit_code_out_(exit_code_out),
-      signal_parent_(false) {
+      signal_parent_(false),
+      weak_factory_for_network_task_runner_(this) {
   StartOnUiThread();
 }
 
@@ -746,7 +740,6 @@ void HostProcess::ShutdownOnUiThread() {
   DCHECK(context_->ui_task_runner()->BelongsToCurrentThread());
 
   // Tear down resources that need to be torn down on the UI thread.
-  network_change_notifier_.reset();
   daemon_channel_.reset();
   desktop_environment_factory_.reset();
 
@@ -762,7 +755,6 @@ void HostProcess::ShutdownOnUiThread() {
 #endif
 }
 
-// Overridden from HeartbeatSender::Listener
 void HostProcess::OnUnknownHostIdError() {
   LOG(ERROR) << "Host ID not found.";
   ShutdownHost(kInvalidHostIdExitCode);
@@ -849,7 +841,8 @@ bool HostProcess::ApplyConfig(const base::DictionaryValue& config) {
   }
 
   if (!oauth_refresh_token_.empty()) {
-    // SignalingConnector is responsible for getting OAuth token.
+    // SignalingConnector (inside MinimumHeartbeatSupporter) is responsible for
+    // getting OAuth token.
     xmpp_server_config_.auth_token = "";
     xmpp_server_config_.auth_service = "oauth2";
   } else if (!config.GetString(kXmppAuthServiceConfigPath,
@@ -1229,44 +1222,36 @@ bool HostProcess::OnGnubbyAuthPolicyUpdate(base::DictionaryValue* policies) {
   return true;
 }
 
+scoped_refptr<MinimumHeartbeatSupporter>
+HostProcess::CreateMinimumHeartbeatSupporter() {
+  DCHECK(!host_id_.empty()); // assumming |ApplyConfig| has already been run

[Lambros, 2014/12/02 03:35:23]

nit: Comments should be English sentences.
nit: Two spaces before //

[Łukasz Anforowicz, 2014/12/02 20:08:01]

Done.

+  return MinimumHeartbeatSupporter::Create(
+      base::Bind(&HostProcess::OnHeartbeatSuccessful,
+                 weak_factory_for_network_task_runner_.GetWeakPtr()),
+      base::Bind(&HostProcess::OnUnknownHostIdError,
+                 weak_factory_for_network_task_runner_.GetWeakPtr()),
+      base::Bind(&HostProcess::OnAuthFailed,
+                 weak_factory_for_network_task_runner_.GetWeakPtr()),
+      *context_,
+      xmpp_server_config_,
+      talkgadget_prefix_,
+      host_id_,
+      key_pair_,
+      directory_bot_jid_,
+      oauth_refresh_token_,
+      use_service_account_);
+}
+
 void HostProcess::StartHost() {
   DCHECK(context_->network_task_runner()->BelongsToCurrentThread());
   DCHECK(!host_);
-  DCHECK(!signal_strategy_.get());
+  DCHECK(!minimum_heartbeat_supporter_.get());
+
   DCHECK(state_ == HOST_INITIALIZING || state_ == HOST_STOPPING_TO_RESTART ||
          state_ == HOST_STOPPED) << state_;
   state_ = HOST_STARTED;
 
-  signal_strategy_.reset(
-      new XmppSignalStrategy(net::ClientSocketFactory::GetDefaultFactory(),
-                             context_->url_request_context_getter(),
-                             xmpp_server_config_));
-
-  scoped_ptr<DnsBlackholeChecker> dns_blackhole_checker(
-      new DnsBlackholeChecker(context_->url_request_context_getter(),
-                              talkgadget_prefix_));
-
-  // Create a NetworkChangeNotifier for use by the signaling connector.
-  network_change_notifier_.reset(net::NetworkChangeNotifier::Create());
-
-  signaling_connector_.reset(new SignalingConnector(
-      signal_strategy_.get(),
-      dns_blackhole_checker.Pass(),
-      base::Bind(&HostProcess::OnAuthFailed, this)));
-
-  if (!oauth_refresh_token_.empty()) {
-    scoped_ptr<OAuthTokenGetter::OAuthCredentials> oauth_credentials;
-    oauth_credentials.reset(
-        new OAuthTokenGetter::OAuthCredentials(
-            xmpp_server_config_.username, oauth_refresh_token_,
-            use_service_account_));
-
-    oauth_token_getter_.reset(new OAuthTokenGetter(
-        oauth_credentials.Pass(), context_->url_request_context_getter(),
-        false));
-
-    signaling_connector_->EnableOAuth(oauth_token_getter_.get());
-  }
+  minimum_heartbeat_supporter_ = CreateMinimumHeartbeatSupporter();
 
   uint32 network_flags = 0;
   if (allow_nat_traversal_) {
@@ -1290,10 +1275,12 @@ void HostProcess::StartHost() {
   }
 
   host_.reset(new ChromotingHost(
-      signal_strategy_.get(),
+      minimum_heartbeat_supporter_->GetSignalStrategy(),
       desktop_environment_factory_.get(),
-      CreateHostSessionManager(signal_strategy_.get(), network_settings,
-                               context_->url_request_context_getter()),
+      CreateHostSessionManager(
+          minimum_heartbeat_supporter_->GetSignalStrategy(),
+          network_settings,
+          context_->url_request_context_getter()),
       context_->audio_task_runner(),
       context_->input_task_runner(),
       context_->video_capture_task_runner(),
@@ -1320,17 +1307,19 @@ void HostProcess::StartHost() {
   host_->SetMaximumSessionDuration(base::TimeDelta::FromHours(20));
 #endif
 
-  heartbeat_sender_.reset(new HeartbeatSender(
-      base::Bind(&HostProcess::OnHeartbeatSuccessful, base::Unretained(this)),
-      base::Bind(&HostProcess::OnUnknownHostIdError, base::Unretained(this)),
-      host_id_, signal_strategy_.get(), key_pair_, directory_bot_jid_));
-
-  host_change_notification_listener_.reset(new HostChangeNotificationListener(
-      this, host_id_, signal_strategy_.get(), directory_bot_jid_));
+  host_change_notification_listener_.reset(
+      new HostChangeNotificationListener(
+          this,
+          host_id_,
+          minimum_heartbeat_supporter_->GetSignalStrategy(),
+          directory_bot_jid_));
 
   host_status_logger_.reset(
-      new HostStatusLogger(host_->AsWeakPtr(), ServerLogEntry::ME2ME,
-                           signal_strategy_.get(), directory_bot_jid_));
+      new HostStatusLogger(
+          host_->AsWeakPtr(),
+          ServerLogEntry::ME2ME,
+          minimum_heartbeat_supporter_->GetSignalStrategy(),
+          directory_bot_jid_));
 
   // Set up reporting the host status notifications.
 #if defined(REMOTING_MULTI_PROCESS)
@@ -1367,14 +1356,23 @@ void HostProcess::ShutdownHost(HostExitCodes exit_code) {
   switch (state_) {
     case HOST_INITIALIZING:
       state_ = HOST_STOPPING;
+      {
+        DCHECK(!minimum_heartbeat_supporter_.get());
+        scoped_refptr<MinimumHeartbeatSupporter> tmpHeartbeatSupporter =
+            CreateMinimumHeartbeatSupporter();
+        tmpHeartbeatSupporter->SendHostOfflineReason(
+            ExitCodeToString(exit_code),
+            base::TimeDelta::FromSeconds(30) /* timeout */);
+      }
       ShutdownOnNetworkThread();
       break;
 
     case HOST_STARTED:
       state_ = HOST_STOPPING;
-      heartbeat_sender_->SetHostOfflineReason(
-          ExitCodeToString(exit_code), base::Bind(base::DoNothing));
-      ScheduleHostShutdown();
+      minimum_heartbeat_supporter_->SendHostOfflineReason(
+          ExitCodeToString(exit_code),
+          base::TimeDelta::FromSeconds(30) /* timeout */);
+      ShutdownOnNetworkThread();
       break;
 
     case HOST_STOPPING_TO_RESTART:
@@ -1388,28 +1386,17 @@ void HostProcess::ShutdownHost(HostExitCodes exit_code) {
   }
 }
 
-// TODO(weitaosu): shut down the host once we get an ACK for the offline status
-//                  XMPP message.
-void HostProcess::ScheduleHostShutdown() {
-  // Delay the shutdown by 2 second to allow SendOfflineStatus to complete.
-  context_->network_task_runner()->PostDelayedTask(
-      FROM_HERE,
-      base::Bind(&HostProcess::ShutdownOnNetworkThread, base::Unretained(this)),
-      base::TimeDelta::FromSeconds(2));
-}
-
 void HostProcess::ShutdownOnNetworkThread() {
   DCHECK(context_->network_task_runner()->BelongsToCurrentThread());
 
+  // Need to invalidate WeakPtrs on the same thread where they are dereferenced.
+  weak_factory_for_network_task_runner_.InvalidateWeakPtrs();
+
   host_.reset();
   host_event_logger_.reset();
   host_status_logger_.reset();
-  heartbeat_sender_.reset();
+  minimum_heartbeat_supporter_ = nullptr;
   host_change_notification_listener_.reset();
-  signaling_connector_.reset();
-  oauth_token_getter_.reset();
-  signal_strategy_.reset();
-  network_change_notifier_.reset();
 
   if (state_ == HOST_STOPPING_TO_RESTART) {
     StartHost();