commit b1ff1f65c422b51ffe48837b3a89d2b736a441e0
author Wludzik, Jozef <jozef.wludzik@intel.com> Fri Oct 23 13:20:52 2020 +0200
committer Krzysztof Grobelny <krzysztof.grobelny@intel.com> Thu Dec 03 13:49:24 2020 +0000
tree abf8efc4686909e9bf547ef113dbc76e56ad7236
parent 6ccfcbf54c3c808d99e754013008b2d7291dc347

Add support for EmitReadingsUpdate property

EmitReadingsUpdate property determines whether Readings
property emits PropertiesChange signal on update.
EmitReadingsUpdate can be used to reduce broadcasting of
signals from Telemetry to lower DBus utilization and hide
Readings update information from other DBus applications.

Tested:
 - Verify if properties are properly propated during Report
   creation.
 - Verify if emitting PropertiesCahgned signal for Readings
   property is disabled when emitReadingsUpdate is set to false.
 - Unit tests are passed with success.

Change-Id: I81be5bc17de6d583dd5820e091d077d474fe424e
Signed-off-by: Wludzik, Jozef <jozef.wludzik@intel.com>

src/report.cpp

diff --git a/src/report.cpp b/src/report.cpp
index c1b7d5f..4d91787 100644
--- a/src/report.cpp
+++ b/src/report.cpp
@@ -4,6 +4,7 @@
 #include "utils/transform.hpp"
 
 #include <phosphor-logging/log.hpp>
+#include <sdbusplus/vtable.hpp>
 
 #include <numeric>
 
@@ -83,9 +84,14 @@
                     return true;
                 },
                 [this](const auto&) { return persistency; });
+
+            auto readingsFlag = sdbusplus::vtable::property_::none;
+            if (emitsReadingsUpdate)
+            {
+                readingsFlag = sdbusplus::vtable::property_::emits_change;
+            }
             dbusIface.register_property_r(
-                "Readings", readings,
-                sdbusplus::vtable::property_::emits_change,
+                "Readings", readings, readingsFlag,
                 [this](const auto&) { return readings; });
             dbusIface.register_property_r(
                 "ReportingType", reportingType,