feat: support tracking

Author: louis-launchdarkly

build.gradle

@@ -107,7 +107,7 @@ nexusPublishing {
 dependencies {
     implementation group: 'com.launchdarkly', name: 'launchdarkly-java-server-sdk', version: '[7.1.0, 8.0.0)'
 
-    implementation 'dev.openfeature:sdk:[1.7.0,2.0.0)'
+    implementation 'dev.openfeature:sdk:[1.14.0,2.0.0)'
 
     // Use JUnit test framework
     testImplementation(platform('org.junit:junit-bom:5.10.0'))

src/main/java/com/launchdarkly/openfeature/serverprovider/Provider.java

@@ -222,6 +222,32 @@ public void shutdown() {
         }
     }
 
+    @Override
+    public void track(String eventName, EvaluationContext ctx, TrackingEventDetails details) {
+        if(ctx == null) {
+            logger.info("LaunchDarkly track methods require an EvaluationContext to work");
+            return;
+        }
+
+        if(details != null) {
+            Double metricValue = null;
+            if (details.getValue().isPresent()) {
+                metricValue = (Double)details.getValue().get();
+            }
+            LDValue data = valueConverter.toLdValue(new Value(details));
+
+            if (metricValue != null) {
+                client.trackMetric(eventName, evaluationContextConverter.toLdContext(ctx), data, metricValue);
+            } else if (!data.isNull() && data.size() > 0) {
+                client.trackData(eventName, evaluationContextConverter.toLdContext(ctx), data);
+            } else {
+                client.track(eventName, evaluationContextConverter.toLdContext(ctx));
+            }
+        } else {
+            client.track(eventName, evaluationContextConverter.toLdContext(ctx));
+        }
+    }
+
     /**
      * Get the LaunchDarkly client associated with this provider.
      * <p>

src/main/java/com/launchdarkly/openfeature/serverprovider/Version.java

@@ -4,5 +4,5 @@ abstract class Version {
   private Version() {}
 
   // This constant is updated automatically by our Gradle script during a release, if the project version has changed
-  static final String SDK_VERSION = "0.2.0";
+  static final String SDK_VERSION = "1.0.1";
 }

src/test/java/com/launchdarkly/openfeature/serverprovider/ProviderTest.java

@@ -126,4 +126,79 @@ public void itCanDoAValueEvaluation() {
         assertEquals("84", detailed.getVariant());
         assertEquals("TARGETING_MATCH", detailed.getReason());
     }
+
+    @Test
+    public void itCanTrackNoTrackingEventDetails() {
+        EvaluationContext evaluationContext = new ImmutableContext("user-key");
+        EvaluationContextConverter evaluationContextConverter = new EvaluationContextConverter(null);
+
+        OpenFeatureAPI.getInstance().setProvider(ldProvider);
+
+        OpenFeatureAPI
+            .getInstance()
+            .getClient().track("metric-key", evaluationContext);
+
+        verify(mockedLdClient).track(
+            "metric-key",
+            evaluationContextConverter.toLdContext(evaluationContext));
+    }
+
+    @Test
+    public void itCanTrackEmptyTrackingEventDetails() {
+        EvaluationContext evaluationContext = new ImmutableContext("user-key");
+        EvaluationContextConverter evaluationContextConverter = new EvaluationContextConverter(null);
+
+        TrackingEventDetails trackingEventDetails = new MutableTrackingEventDetails(null);
+
+        OpenFeatureAPI.getInstance().setProvider(ldProvider);
+
+        OpenFeatureAPI
+            .getInstance()
+            .getClient().track("metric-key", evaluationContext, trackingEventDetails);
+            
+        verify(mockedLdClient).track(
+            "metric-key", 
+            evaluationContextConverter.toLdContext(evaluationContext));
+    }
+
+    @Test
+    public void itCanTrackTrackingEventDetailsWithNoValue() {
+        EvaluationContext evaluationContext = new ImmutableContext("user-key");
+        EvaluationContextConverter evaluationContextConverter = new EvaluationContextConverter(null);
+        ValueConverter valueConverter = new ValueConverter(null);
+
+        TrackingEventDetails trackingEventDetails = new MutableTrackingEventDetails(null).add("currency", "USD");
+
+        OpenFeatureAPI.getInstance().setProvider(ldProvider);
+
+        OpenFeatureAPI
+            .getInstance()
+            .getClient().track("metric-key", evaluationContext, trackingEventDetails);
+
+        verify(mockedLdClient).trackData(
+            "metric-key",
+            evaluationContextConverter.toLdContext(evaluationContext), 
+            valueConverter.toLdValue(new Value(trackingEventDetails)));
+    }
+
+    @Test
+    public void itCanTrackFullTrackingEventDetails() {
+        EvaluationContext evaluationContext = new ImmutableContext("user-key");
+        EvaluationContextConverter evaluationContextConverter = new EvaluationContextConverter(null);
+        ValueConverter valueConverter = new ValueConverter(null);
+
+        TrackingEventDetails trackingEventDetails = new MutableTrackingEventDetails(99.77).add("currency", "USD");
+
+        OpenFeatureAPI.getInstance().setProvider(ldProvider);
+
+        OpenFeatureAPI
+            .getInstance()
+            .getClient().track("metric-key", evaluationContext, trackingEventDetails);
+
+        verify(mockedLdClient).trackMetric(
+            "metric-key",
+            evaluationContextConverter.toLdContext(evaluationContext),
+            valueConverter.toLdValue(new Value(trackingEventDetails)),
+            99.77);
+    }
 }