Make DBus a singleton.
All the proxies need dbus to initialize, so we are passing dbus around,
to make it easier to compile dbus conditionally, this patch makes it a
singleton so that the proxies can get dbus on their own.
Test: mma
Bug: 28800946
Change-Id: Idf062c843aa34a431c2201bae5b895dc1d0ea787
diff --git a/dbus_connection.h b/dbus_connection.h
new file mode 100644
index 0000000..c3205ba
--- /dev/null
+++ b/dbus_connection.h
@@ -0,0 +1,44 @@
+//
+// Copyright (C) 2016 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#ifndef UPDATE_ENGINE_DBUS_CONNECTION_H_
+#define UPDATE_ENGINE_DBUS_CONNECTION_H_
+
+#include <base/memory/ref_counted.h>
+#include <brillo/dbus/dbus_connection.h>
+#include <dbus/bus.h>
+
+namespace chromeos_update_engine {
+
+class DBusConnection {
+ public:
+ DBusConnection();
+
+ const scoped_refptr<dbus::Bus>& GetDBus();
+
+ static DBusConnection* Get();
+
+ private:
+ scoped_refptr<dbus::Bus> bus_;
+
+ brillo::DBusConnection dbus_connection_;
+
+ DISALLOW_COPY_AND_ASSIGN(DBusConnection);
+};
+
+} // namespace chromeos_update_engine
+
+#endif // UPDATE_ENGINE_DBUS_CONNECTION_H_