Add support for callbacks

Callbacks are the response in the PDM 'trigger->response' model.
Add general support for implementing callbacks and implement
a log to systemd journal using that framework.

Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Change-Id: I8bead5368ee5472a02b47e8bba9e9df3a1f346bc

1 files changed, 46 insertions, 0 deletions

diff --git a/src/journal.cpp b/src/journal.cpp
new file mode 100644
index 0000000..46f74e9
--- /dev/null
+++ b/src/journal.cpp
@@ -0,0 +1,46 @@
+/**
+ * Copyright © 2017 IBM Corporation
+ *
+ * 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.
+ */
+#include "journal.hpp"
+
+namespace phosphor
+{
+namespace dbus
+{
+namespace monitoring
+{
+
+void JournalBase::operator()()
+{
+    for (const auto& n : index)
+    {
+        const auto& path = std::get<0>(n.first);
+        const auto& pathMeta = std::get<0>(n.second);
+        const auto& propertyMeta = std::get<1>(n.second);
+        const auto& value = std::get<2>(n.second);
+
+        if (!value.get().empty())
+        {
+            log(message,
+                pathMeta,
+                path,
+                propertyMeta,
+                value);
+        }
+    }
+}
+} // namespace monitoring
+} // namespace dbus
+} // namespace phosphor