EventService: Add MetricReport support

Add Telemetry metric report support to EventService.
 - Adding MetricReport support to schema implemenation.
 - Dynamically register and unregister the metric report
   signal.
 - Reads Telemtry data using D-Bus calls.
 - Filter the metric reports depending on user configured
   MetricReportDefinition.
 - Format the Telemetry readings as per MetricReport schema.
 - Send the formatted data to the client.

Tested:
 - HTTP client successfully received asynchronous metric
   reports data.
 - valdiated the register and unregister by adding and
   deleting subscriptions.
 - Ran Redfish validator successfully.

Change-Id: I7b59ac3ecad169a7959a800730dbc2fe85baf068
Signed-off-by: AppaRao Puli <apparao.puli@linux.intel.com>

1 files changed, 12 insertions, 3 deletions

diff --git a/redfish-core/lib/event_service.hpp b/redfish-core/lib/event_service.hpp
index 3e3435ff49..63302d6072 100644
--- a/redfish-core/lib/event_service.hpp
+++ b/redfish-core/lib/event_service.hpp
@@ -19,8 +19,8 @@
 namespace redfish
 {
 
-static constexpr const std::array<const char*, 1> supportedEvtFormatTypes = {
-    "Event"};
+static constexpr const std::array<const char*, 2> supportedEvtFormatTypes = {
+    eventFormatType, metricReportFormatType};
 static constexpr const std::array<const char*, 3> supportedRegPrefixes = {
     "Base", "OpenBMC", "Task"};
 static constexpr const std::array<const char*, 3> supportedRetryPolicies = {
@@ -217,13 +217,15 @@ class EventDestinationCollection : public Node
         std::optional<std::vector<std::string>> msgIds;
         std::optional<std::vector<std::string>> regPrefixes;
         std::optional<std::vector<nlohmann::json>> headers;
+        std::optional<std::vector<nlohmann::json>> metricReportDefinitions;
 
         if (!json_util::readJson(
                 req, res, "Destination", destUrl, "Context", context,
                 "Protocol", protocol, "SubscriptionType", subscriptionType,
                 "EventFormatType", eventFormatType, "HttpHeaders", headers,
                 "RegistryPrefixes", regPrefixes, "MessageIds", msgIds,
-                "DeliveryRetryPolicy", retryPolicy))
+                "DeliveryRetryPolicy", retryPolicy, "MetricReportDefinitions",
+                metricReportDefinitions))
         {
             return;
         }
@@ -373,6 +375,11 @@ class EventDestinationCollection : public Node
             subValue->retryPolicy = "TerminateAfterRetries";
         }
 
+        if (metricReportDefinitions)
+        {
+            subValue->metricReportDefinitions = *metricReportDefinitions;
+        }
+
         std::string id =
             EventServiceManager::getInstance().addSubscription(subValue);
         if (id.empty())
@@ -441,6 +448,8 @@ class EventDestination : public Node
             subValue->registryPrefixes;
         asyncResp->res.jsonValue["MessageIds"] = subValue->registryMsgIds;
         asyncResp->res.jsonValue["DeliveryRetryPolicy"] = subValue->retryPolicy;
+        asyncResp->res.jsonValue["MetricReportDefinitions"] =
+            subValue->metricReportDefinitions;
     }
 
     void doPatch(crow::Response& res, const crow::Request& req,