feat: Added new metadata fields to Registration and Metrics

src/main/java/io/getunleash/metric/ClientMetrics.java

@@ -2,6 +2,7 @@
 
 import io.getunleash.event.UnleashEvent;
 import io.getunleash.event.UnleashSubscriber;
+import io.getunleash.lang.Nullable;
 import io.getunleash.util.UnleashConfig;
 
 public class ClientMetrics implements UnleashEvent {
@@ -10,12 +11,20 @@ public class ClientMetrics implements UnleashEvent {
     private final String instanceId;
     private final MetricsBucket bucket;
     private final String environment;
+    private final String specVersion;
+    private final String platformName;
+    private final String platformVersion;
+    @Nullable private final String yggdrasilVersion;
 
     ClientMetrics(UnleashConfig config, MetricsBucket bucket) {
         this.environment = config.getEnvironment();
         this.appName = config.getAppName();
         this.instanceId = config.getInstanceId();
         this.bucket = bucket;
+        this.specVersion = config.getClientSpecificationVersion();
+        this.platformName = System.getProperty("java.vm.name", "JRE");
+        this.platformVersion = System.getProperty("java.vm.version", "1.8");
+        this.yggdrasilVersion = null;
     }
 
     public String getAppName() {
@@ -34,6 +43,23 @@ public String getEnvironment() {
         return environment;
     }
 
+    public String getSpecVersion() {
+        return specVersion;
+    }
+
+    public String getPlatformName() {
+        return platformName;
+    }
+
+    public String getPlatformVersion() {
+        return platformVersion;
+    }
+
+    @Nullable
+    public String getYggdrasilVersion() {
+        return yggdrasilVersion;
+    }
+
     @Override
     public void publishTo(UnleashSubscriber unleashSubscriber) {
         unleashSubscriber.clientMetrics(this);

src/main/java/io/getunleash/metric/ClientRegistration.java

@@ -2,6 +2,7 @@
 
 import io.getunleash.event.UnleashEvent;
 import io.getunleash.event.UnleashSubscriber;
+import io.getunleash.lang.Nullable;
 import io.getunleash.util.UnleashConfig;
 import java.time.LocalDateTime;
 import java.util.Set;
@@ -14,6 +15,10 @@ public class ClientRegistration implements UnleashEvent {
     private final LocalDateTime started;
     private final long interval;
     private final String environment;
+    private final String platformName;
+    private final String platformVersion;
+    @Nullable private final String yggdrasilVersion;
+    private final String specVersion;
 
     ClientRegistration(UnleashConfig config, LocalDateTime started, Set<String> strategies) {
         this.environment = config.getEnvironment();
@@ -23,6 +28,10 @@ public class ClientRegistration implements UnleashEvent {
         this.started = started;
         this.strategies = strategies;
         this.interval = config.getSendMetricsInterval();
+        this.specVersion = config.getClientSpecificationVersion();
+        this.platformName = System.getProperty("java.vm.name", "JRE");
+        this.platformVersion = System.getProperty("java.vm.version", "1.8");
+        this.yggdrasilVersion = null;
     }
 
     public String getAppName() {
@@ -53,6 +62,22 @@ public String getEnvironment() {
         return environment;
     }
 
+    public String getPlatformName() {
+        return platformName;
+    }
+
+    public String getPlatformVersion() {
+        return platformVersion;
+    }
+
+    public @Nullable String getYggdrasilVersion() {
+        return yggdrasilVersion;
+    }
+
+    public String getSpecVersion() {
+        return specVersion;
+    }
+
     @Override
     public void publishTo(UnleashSubscriber unleashSubscriber) {
         unleashSubscriber.clientRegistered(this);

src/main/java/io/getunleash/metric/UnleashMetricServiceImpl.java

@@ -13,7 +13,6 @@ public class UnleashMetricServiceImpl implements UnleashMetricService {
     private static final Logger LOGGER = LoggerFactory.getLogger(UnleashMetricServiceImpl.class);
     private final LocalDateTime started;
     private final UnleashConfig unleashConfig;
-
     private final MetricSender metricSender;
 
     // mutable
@@ -40,6 +39,7 @@ public UnleashMetricServiceImpl(
                         300,
                         unleashConfig.getUnleashURLs().getClientMetricsURL());
         long metricsInterval = unleashConfig.getSendMetricsInterval();
+
         executor.setInterval(sendMetrics(), metricsInterval, metricsInterval);
     }
 

src/test/java/io/getunleash/metric/UnleashMetricServiceImplTest.java

@@ -5,6 +5,7 @@
 
 import io.getunleash.util.UnleashConfig;
 import io.getunleash.util.UnleashScheduledExecutor;
+import java.time.LocalDateTime;
 import java.util.HashSet;
 import java.util.Set;
 import org.junit.jupiter.api.Test;
@@ -412,4 +413,49 @@ public void url_not_found_immediately_increases_interval_to_max() {
         assertThat(unleashMetricService.getFailures()).isEqualTo(0);
         assertThat(unleashMetricService.getSkips()).isEqualTo(0);
     }
+
+    @Test
+    public void should_add_new_metrics_data_to_bucket() {
+        UnleashConfig config =
+                UnleashConfig.builder()
+                        .appName("test")
+                        .sendMetricsInterval(10)
+                        .unleashAPI("http://unleash.com")
+                        .build();
+
+        UnleashScheduledExecutor executor = mock(UnleashScheduledExecutor.class);
+        DefaultHttpMetricsSender sender = mock(DefaultHttpMetricsSender.class);
+
+        UnleashMetricService unleashMetricService =
+                new UnleashMetricServiceImpl(config, sender, executor);
+
+        ArgumentCaptor<Runnable> sendMetricsCallback = ArgumentCaptor.forClass(Runnable.class);
+        verify(executor).setInterval(sendMetricsCallback.capture(), anyLong(), anyLong());
+
+        sendMetricsCallback.getValue().run();
+        ArgumentCaptor<ClientMetrics> metricsSent = ArgumentCaptor.forClass(ClientMetrics.class);
+        verify(sender, times(1)).sendMetrics(metricsSent.capture());
+        ClientMetrics metrics = metricsSent.getValue();
+        assertThat(metrics.getSpecVersion()).isNotEmpty();
+        assertThat(metrics.getYggdrasilVersion()).isNull();
+        assertThat(metrics.getPlatformName()).isNotEmpty();
+        assertThat(metrics.getPlatformVersion()).isNotEmpty();
+    }
+
+    @Test
+    public void client_registration_also_includes_new_metrics_metadata() {
+        UnleashConfig config =
+                UnleashConfig.builder()
+                        .appName("test")
+                        .sendMetricsInterval(10)
+                        .unleashAPI("http://unleash.com")
+                        .build();
+        Set<String> strategies = new HashSet<>();
+        strategies.add("default");
+        ClientRegistration reg = new ClientRegistration(config, LocalDateTime.now(), strategies);
+        assertThat(reg.getPlatformName()).isNotEmpty();
+        assertThat(reg.getPlatformVersion()).isNotEmpty();
+        assertThat(reg.getSpecVersion()).isEqualTo(config.getClientSpecificationVersion());
+        assertThat(reg.getYggdrasilVersion()).isNull();
+    }
 }