dbus: Make ObjectManager get objects after service is ready.

Make dbus::ObjectManager automatically fetch managed objects
after the remote service becomes available. Also remove
Bus::GetManagedObjects(), which produces a large amount of
log spam due to some services not yet being ready. (It was
called by chromeos::DBusThreadManager and
bluez::BluezDBusManager at startup.)

BUG=636554

Review-Url: https://codereview.chromium.org/2239123002
Cr-Commit-Position: refs/heads/master@{#417405}

chromeos/dbus/dbus_thread_manager.cc

@@ -216,11 +216,6 @@ void DBusThreadManager::InitializeClients() {
   GetSystemClockClient()->Init(GetSystemBus());
   GetUpdateEngineClient()->Init(GetSystemBus());
 
-  // This must be called after the list of clients so they've each had a
-  // chance to register with their object g_dbus_thread_managers.
-  if (GetSystemBus())
-    GetSystemBus()->GetManagedObjects();
-
   client_bundle_->SetupDefaultEnvironment();
 }
 

dbus/bus.cc

@@ -400,13 +400,6 @@ void Bus::RemoveObjectManagerInternalHelper(
   callback.Run();
 }
 
-void Bus::GetManagedObjects() {
-  for (ObjectManagerTable::iterator iter = object_manager_table_.begin();
-       iter != object_manager_table_.end(); ++iter) {
-    iter->second->GetManagedObjects();
-  }
-}
-
 bool Bus::Connect() {
   // dbus_bus_get_private() and dbus_bus_get() are blocking calls.
   AssertOnDBusThread();

dbus/bus.h

@@ -360,12 +360,6 @@ class CHROME_DBUS_EXPORT Bus : public base::RefCountedThreadSafe<Bus> {
                                    const ObjectPath& object_path,
                                    const base::Closure& callback);
 
-  // Instructs all registered object managers to retrieve their set of managed
-  // objects from their respective remote objects. There is no need to call this
-  // manually, this is called automatically by the D-Bus thread manager once
-  // implementation classes are registered.
-  virtual void GetManagedObjects();
-
   // Shuts down the bus and blocks until it's done. More specifically, this
   // function does the following:
   //

dbus/mock_object_manager.h

@@ -31,7 +31,6 @@ class MockObjectManager : public ObjectManager {
   MOCK_METHOD1(GetObjectProxy, ObjectProxy*(const ObjectPath&));
   MOCK_METHOD2(GetProperties, PropertySet*(const ObjectPath&,
                                            const std::string&));
-  MOCK_METHOD0(GetManagedObjects, void());
 
  protected:
   virtual ~MockObjectManager();

dbus/object_manager.cc

@@ -167,35 +167,6 @@ void ObjectManager::CleanUp() {
   match_rule_.clear();
 }
 
-void ObjectManager::InitializeObjects() {
-  DCHECK(bus_);
-  DCHECK(object_proxy_);
-  DCHECK(setup_success_);
-
-  // |object_proxy_| is no longer valid if the Bus was shut down before this
-  // call. Don't initiate any other action from the origin thread.
-  if (cleanup_called_)
-    return;
-
-  object_proxy_->ConnectToSignal(
-      kObjectManagerInterface,
-      kObjectManagerInterfacesAdded,
-      base::Bind(&ObjectManager::InterfacesAddedReceived,
-                 weak_ptr_factory_.GetWeakPtr()),
-      base::Bind(&ObjectManager::InterfacesAddedConnected,
-                 weak_ptr_factory_.GetWeakPtr()));
-
-  object_proxy_->ConnectToSignal(
-      kObjectManagerInterface,
-      kObjectManagerInterfacesRemoved,
-      base::Bind(&ObjectManager::InterfacesRemovedReceived,
-                 weak_ptr_factory_.GetWeakPtr()),
-      base::Bind(&ObjectManager::InterfacesRemovedConnected,
-                 weak_ptr_factory_.GetWeakPtr()));
-
-  GetManagedObjects();
-}
-
 bool ObjectManager::SetupMatchRuleAndFilter() {
   DCHECK(bus_);
   DCHECK(!setup_success_);
@@ -235,10 +206,39 @@ bool ObjectManager::SetupMatchRuleAndFilter() {
 }
 
 void ObjectManager::OnSetupMatchRuleAndFilterComplete(bool success) {
-  LOG_IF(WARNING, !success) << service_name_ << " " << object_path_.value()
-                            << ": Failed to set up match rule.";
-  if (success)
-    InitializeObjects();
+  if (!success) {
+    LOG(WARNING) << service_name_ << " " << object_path_.value()
+                 << ": Failed to set up match rule.";
+    return;
+  }
+
+  DCHECK(bus_);
+  DCHECK(object_proxy_);
+  DCHECK(setup_success_);
+
+  // |object_proxy_| is no longer valid if the Bus was shut down before this
+  // call. Don't initiate any other action from the origin thread.
+  if (cleanup_called_)
+    return;
+
+  object_proxy_->ConnectToSignal(
+      kObjectManagerInterface,
+      kObjectManagerInterfacesAdded,
+      base::Bind(&ObjectManager::InterfacesAddedReceived,
+                 weak_ptr_factory_.GetWeakPtr()),
+      base::Bind(&ObjectManager::InterfacesAddedConnected,
+                 weak_ptr_factory_.GetWeakPtr()));
+
+  object_proxy_->ConnectToSignal(
+      kObjectManagerInterface,
+      kObjectManagerInterfacesRemoved,
+      base::Bind(&ObjectManager::InterfacesRemovedReceived,
+                 weak_ptr_factory_.GetWeakPtr()),
+      base::Bind(&ObjectManager::InterfacesRemovedConnected,
+                 weak_ptr_factory_.GetWeakPtr()));
+
+  if (!service_name_owner_.empty())
+    GetManagedObjects();
 }
 
 // static

dbus/object_manager.h

@@ -71,8 +71,9 @@
 //     object_manager_->UnregisterInterface(kInterface);
 //   }
 //
-// The D-Bus thread manager takes care of issuing the necessary call to
-// GetManagedObjects() after the implementation classes have been set up.
+// This class calls GetManagedObjects() asynchronously after the remote service
+// becomes available and additionally refreshes managed objects after the
+// service stops or restarts.
 //
 // The object manager interface class has one abstract method that must be
 // implemented by the class to create Properties structures on demand. As well
@@ -238,17 +239,14 @@ class CHROME_DBUS_EXPORT ObjectManager
  private:
   friend class base::RefCountedThreadSafe<ObjectManager>;
 
-  // Connects the InterfacesAdded and InterfacesRemoved signals and calls
-  // GetManagedObjects. Called from OnSetupMatchRuleAndFilterComplete.
-  void InitializeObjects();
-
   // Called from the constructor to add a match rule for PropertiesChanged
-  // signals on the DBus thread and set up a corresponding filter function.
+  // signals on the D-Bus thread and set up a corresponding filter function.
   bool SetupMatchRuleAndFilter();
 
   // Called on the origin thread once the match rule and filter have been set
-  // up. |success| is false, if an error occurred during set up; it's true
-  // otherwise.
+  // up. Connects the InterfacesAdded and InterfacesRemoved signals and
+  // refreshes objects if the service is available. |success| is false if an
+  // error occurred during setup and true otherwise.
   void OnSetupMatchRuleAndFilterComplete(bool success);
 
   // Called by dbus:: when a message is received. This is used to filter

device/bluetooth/dbus/bluez_dbus_manager.cc

@@ -195,11 +195,6 @@ void BluezDBusManager::InitializeClients() {
   client_bundle_->bluetooth_media_client()->Init(GetSystemBus());
   client_bundle_->bluetooth_media_transport_client()->Init(GetSystemBus());
   client_bundle_->bluetooth_profile_manager_client()->Init(GetSystemBus());
-
-  // This must be called after the list of clients so they've each had a
-  // chance to register with their object g_dbus_thread_managers.
-  if (GetSystemBus())
-    GetSystemBus()->GetManagedObjects();
 }
 
 // static