added support for Collection Functions
new supported operations: min,max,sum,avg
new supported time scopes: interval,startup
added unit test to verify that each collection function returns correct
timestamp and value
Tested:
- POST/GET on telemetry features in bmcweb, no regression detected
- Using dbus API metric with collection function works as expected
Change-Id: Ib364c433915e07fd7a102f00109525362c40ab8a
Signed-off-by: Krzysztof Grobelny <krzysztof.grobelny@intel.com>
diff --git a/src/details/collection_function.hpp b/src/details/collection_function.hpp
new file mode 100644
index 0000000..a8708e7
--- /dev/null
+++ b/src/details/collection_function.hpp
@@ -0,0 +1,29 @@
+#pragma once
+
+#include "types/operation_type.hpp"
+
+#include <cstdint>
+#include <memory>
+#include <utility>
+#include <vector>
+
+namespace details
+{
+
+using ReadingItem = std::pair<uint64_t, double>;
+
+class CollectionFunction
+{
+ public:
+ virtual ~CollectionFunction() = default;
+
+ virtual ReadingItem calculate(const std::vector<ReadingItem>& readings,
+ uint64_t timestamp) const = 0;
+ virtual ReadingItem
+ calculateForStartupInterval(std::vector<ReadingItem>& readings,
+ uint64_t timestamp) const = 0;
+};
+
+std::shared_ptr<CollectionFunction> makeCollectionFunction(OperationType);
+
+} // namespace details