HPCC-33167 Add unique ID to each metric

Added unique ID to each metric when constructed Signed-Off-By: Kenneth Rowland kenneth.rowland@lexisnexisrisk.com
hpcc-systems · Jan 13, 2025 · d8b1d29 · d8b1d29
1 parent eb69d88
commit d8b1d29
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Showing 3 changed files with 34 additions and 1 deletion.
diff --git a/system/jlib/jmetrics.cpp b/system/jlib/jmetrics.cpp
@@ -28,6 +28,8 @@ MODULE_EXIT()
     metricsManager.destroy();
 }
 
+// MetricBase static member
+std::atomic<unsigned int> MetricBase::metricId = 0;
 
 HistogramMetric::HistogramMetric(const char *_name, const char *_desc, StatisticMeasure _units, const std::vector<__uint64> &_bucketLimits, const MetricMetaData &_metaData) :
     MetricBase(_name, _desc, MetricType::METRICS_HISTOGRAM, _units, _metaData)

diff --git a/system/jlib/jmetrics.hpp b/system/jlib/jmetrics.hpp
@@ -126,6 +126,7 @@ class jlib_decl MetricBase : public IMetric
     StatisticMeasure queryUnits() const override { return units; }
     virtual std::vector<__uint64> queryHistogramValues() const override { return {}; }
     virtual std::vector<__uint64> queryHistogramBucketLimits() const override { return {}; }
+    unsigned int queryId() const { return myId; }
 
 
 protected:
@@ -135,14 +136,18 @@ class jlib_decl MetricBase : public IMetric
         description{_desc},
         metricType{_metricType},
         units{_units},
-        metaData{_metaData} { }
+        metaData{_metaData} { myId = ++metricId; }
 
 protected:
     std::string name;
     std::string description;
     MetricType metricType;
     StatisticMeasure units;
     MetricMetaData metaData;
+
+private:
+    static std::atomic<unsigned int> metricId;
+    unsigned int myId;
 };
 
 

diff --git a/testing/unittests/metrics/MetricFrameworkTests.cpp b/testing/unittests/metrics/MetricFrameworkTests.cpp
@@ -76,6 +76,7 @@ class MetricFrameworkTests : public CppUnit::TestFixture
         CPPUNIT_TEST(Test_metric_meta_data);
         CPPUNIT_TEST(Test_gauge_by_counters_metric);
         CPPUNIT_TEST(Test_histogram_metric);
+        CPPUNIT_TEST(Test_validate_unique_metric_ids);
     CPPUNIT_TEST_SUITE_END();
 
 protected:
@@ -469,6 +470,31 @@ class MetricFrameworkTests : public CppUnit::TestFixture
         CPPUNIT_ASSERT(result);
     }
 
+    void Test_validate_unique_metric_ids()
+    {
+        std::shared_ptr<CounterMetric> pCounter1 = std::make_shared<CounterMetric>("testcounter1", "description", SMeasureCount);
+        auto initialMetricId1 = pCounter1->queryId();
+        std::shared_ptr<CounterMetric> pCounter2 = std::make_shared<CounterMetric>("testcounter2", "description", SMeasureCount);
+        auto initialMetricId2 = pCounter2->queryId();
+        std::shared_ptr<CounterMetric> pCounter3 = std::make_shared<CounterMetric>("testcounter3", "description", SMeasureCount);
+        auto initialMetricId3 = pCounter3->queryId();
+
+        // make sure initial id query values all different
+        bool different = initialMetricId1 != initialMetricId2 && initialMetricId1 != initialMetricId3 && initialMetricId2 != initialMetricId3;
+        CPPUNIT_ASSERT(different);
+
+        // requery values since some were queried before additional metrics allocated
+        auto afterMetricId1 = pCounter1->queryId();
+        auto afterMetricId2 = pCounter2->queryId();
+        auto afterMetricId3 = pCounter3->queryId();
+
+        bool different2 = afterMetricId1 != afterMetricId2 && afterMetricId1 != afterMetricId3 && afterMetricId2 != afterMetricId3;
+        CPPUNIT_ASSERT(different2);
+
+        bool unchanged = initialMetricId1 == afterMetricId1 && initialMetricId2 == afterMetricId2 && initialMetricId3 == afterMetricId3;
+        CPPUNIT_ASSERT(unchanged);
+    }
+
 protected:
     MetricsManager frameworkTestManager;
     MetricFrameworkTestSink *pTestSink;