Add watch on D-Bus object paths
Clients specify the object paths to watch in the config yaml.
Example yaml file and parser changes are pushed in separate
patch
Callbacks are invoked based on the watch type created i.e
interfaceadded/interfaceremoved
Change-Id: Icb7b9bf4c072f8b8df33747c813a1f07b61de637
Signed-off-by: Marri Devender Rao <devenrao@in.ibm.com>
diff --git a/src/pathwatch.hpp b/src/pathwatch.hpp
new file mode 100644
index 0000000..db81bec
--- /dev/null
+++ b/src/pathwatch.hpp
@@ -0,0 +1,70 @@
+/**
+ * @file PathWatch.hpp
+ * @brief Add watch for the object path for interfaces added/removed signal
+ *
+ * In general class users should include pathwatchimpl.hpp instead to avoid
+ * link failures.
+ */
+#pragma once
+
+#include "data_types.hpp"
+#include "watch.hpp"
+
+namespace phosphor
+{
+namespace dbus
+{
+namespace monitoring
+{
+
+class Callback;
+
+/** @class PathWatch
+ * @brief Watch on object path for interfaceadded/interfaceremoved signals
+ */
+template <typename DBusInterfaceType> class PathWatch : public Watch
+{
+ public:
+ PathWatch() = delete;
+ PathWatch(const PathWatch&) = delete;
+ PathWatch(PathWatch&&) = default;
+ PathWatch& operator=(const PathWatch&) = delete;
+ PathWatch& operator=(PathWatch&&) = default;
+ virtual ~PathWatch() = default;
+ PathWatch(const std::string& path, Callback& callback) :
+ Watch(), objectPath(path), cb(callback), alreadyRan(false)
+ {
+ }
+
+ /** @brief Start the watch.
+ *
+ * Watch start interface implementation for PathWatch.
+ */
+ void start() override;
+
+ /** @brief Run the watch callback method.
+ *
+ * Watch callback interface implementation for PathWatch.
+ */
+ void callback(Context ctx) override;
+
+ /** @brief Run the watch callback method.
+ *
+ * Watch callback interface implementation for PathWatch.
+ */
+ void callback(Context ctx, sdbusplus::message::message& msg) override;
+
+ protected:
+ /** @brief Path of the D-Bus object to watch for. */
+ const std::string& objectPath;
+
+ /** @brief Optional callback method. */
+ Callback& cb;
+
+ /** @brief The start method should only be invoked once. */
+ bool alreadyRan;
+};
+
+} // namespace monitoring
+} // namespace dbus
+} // namespace phosphor