feat: add new metric to monitor deliveries

gradle.properties

@@ -1,2 +1,2 @@
 fabric8Version=5.12.4
-horizonParentVersion=4.1.0
+horizonParentVersion=4.3.0

src/main/java/de/telekom/horizon/pulsar/service/SseTask.java

@@ -8,6 +8,7 @@
 import com.fasterxml.jackson.databind.ObjectMapper;
 import de.telekom.eni.pandora.horizon.cache.service.DeDuplicationService;
 import de.telekom.eni.pandora.horizon.kafka.event.EventWriter;
+import de.telekom.eni.pandora.horizon.metrics.HorizonMetricsHelper;
 import de.telekom.eni.pandora.horizon.model.event.Status;
 import de.telekom.eni.pandora.horizon.model.event.StatusMessage;
 import de.telekom.eni.pandora.horizon.model.event.SubscriptionEventMessage;
@@ -40,6 +41,8 @@
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.stream.Stream;
 
+import static de.telekom.eni.pandora.horizon.metrics.HorizonMetricsConstants.METRIC_SENT_SSE_EVENTS;
+
 /**
  * Represents a Server-Sent Events (SSE) task responsible for emitting events to clients.
  *
@@ -61,6 +64,7 @@ public class SseTask implements Runnable {
     private final EventWriter eventWriter;
     private final DeDuplicationService deDuplicationService;
     private final HorizonTracer tracingHelper;
+    private final HorizonMetricsHelper metricsHelper;
 
     @Setter
     private String contentType = APPLICATION_STREAM_JSON_VALUE;
@@ -99,6 +103,7 @@ public SseTask(SseTaskStateContainer sseTaskStateContainer,
         this.eventWriter = factory.getEventWriter();
         this.deDuplicationService = factory.getDeDuplicationService();
         this.tracingHelper = factory.getTracingHelper();
+        this.metricsHelper = factory.getMetricsHelper();
     }
 
     /**
@@ -316,6 +321,8 @@ private void sendEvent(SubscriptionEventMessage msg, boolean includeHttpHeaders)
 
             bytesConsumed.addAndGet(eventJson.getBytes(StandardCharsets.UTF_8).length);
             numberConsumed.incrementAndGet();
+
+            metricsHelper.getRegistry().counter(METRIC_SENT_SSE_EVENTS, metricsHelper.buildTagsFromSubscriptionEventMessage(msg)).increment();
         } catch (JsonProcessingException e) {
             var err = String.format("Error occurred while emitting the event: %s", e.getMessage());
             log.info(err, e);

src/main/java/de/telekom/horizon/pulsar/service/SseTaskFactory.java

@@ -6,6 +6,7 @@
 
 import de.telekom.eni.pandora.horizon.cache.service.DeDuplicationService;
 import de.telekom.eni.pandora.horizon.kafka.event.EventWriter;
+import de.telekom.eni.pandora.horizon.metrics.HorizonMetricsHelper;
 import de.telekom.eni.pandora.horizon.mongo.repository.MessageStateMongoRepo;
 import de.telekom.eni.pandora.horizon.tracing.HorizonTracer;
 import de.telekom.horizon.pulsar.cache.ConnectionCache;
@@ -36,6 +37,7 @@ public class SseTaskFactory {
     private final DeDuplicationService deDuplicationService;
     private final HorizonTracer tracingHelper;
     private final EventWriter eventWriter;
+    private final HorizonMetricsHelper metricsHelper;
 
     /**
      * Constructs an instance of {@code SseTaskFactory}.
@@ -57,6 +59,7 @@ public SseTaskFactory(
             KafkaPicker kafkaPicker,
             MessageStateMongoRepo messageStateMongoRepo,
             DeDuplicationService deDuplicationService,
+            HorizonMetricsHelper metricsHelper,
             HorizonTracer tracingHelper) {
 
         this.pulsarConfig = pulsarConfig;
@@ -66,8 +69,8 @@ public SseTaskFactory(
         this.tracingHelper = tracingHelper;
         this.connectionCache = connectionCache;
         this.deDuplicationService = deDuplicationService;
-
         this.eventWriter = eventWriter;
+        this.metricsHelper = metricsHelper;
     }
 
     /**

src/test/java/de/telekom/horizon/pulsar/service/EventMessageSupplierTest.java

@@ -12,6 +12,9 @@
 import de.telekom.eni.pandora.horizon.model.event.StatusMessage;
 import de.telekom.horizon.pulsar.helper.StreamLimit;
 import de.telekom.horizon.pulsar.testutils.MockHelper;
+import io.micrometer.core.instrument.Counter;
+import io.micrometer.core.instrument.MeterRegistry;
+import io.micrometer.core.instrument.Tags;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.kafka.clients.consumer.ConsumerRecord;
 import org.junit.jupiter.api.BeforeEach;
@@ -83,7 +86,6 @@ void testGetEventMessageContext(int polls) {
         var eventWriterMock = mock(EventWriter.class);
         ReflectionTestUtils.setField(eventMessageSupplier, "eventWriter", eventWriterMock, EventWriter.class);
 
-
         // We do multiple calls to EventMessageSupplier.get() in order to test
         // that each call will fetch the next event message in the queue
         for (int i = 0; i < polls; i++) {

src/test/java/de/telekom/horizon/pulsar/service/SseTaskFactoryTest.java

@@ -38,7 +38,7 @@ class SseTaskFactoryTest {
     void setupSseTaskFactoryTest() {
         MockHelper.init();
 
-        sseTaskFactorySpy = spy(new SseTaskFactory(MockHelper.pulsarConfig, MockHelper.connectionCache, MockHelper.connectionGaugeCache, MockHelper.eventWriter, MockHelper.kafkaPicker, MockHelper.messageStateMongoRepo, MockHelper.deDuplicationService, MockHelper.tracingHelper));
+        sseTaskFactorySpy = spy(new SseTaskFactory(MockHelper.pulsarConfig, MockHelper.connectionCache, MockHelper.connectionGaugeCache, MockHelper.eventWriter, MockHelper.kafkaPicker, MockHelper.messageStateMongoRepo, MockHelper.deDuplicationService, MockHelper.metricsHelper, MockHelper.tracingHelper));
     }
 
     SubscriptionResource createSubscriptionResource() {

src/test/java/de/telekom/horizon/pulsar/service/SseTaskTest.java

@@ -18,6 +18,9 @@
 import de.telekom.horizon.pulsar.helper.SseTaskStateContainer;
 import de.telekom.horizon.pulsar.helper.StreamLimit;
 import de.telekom.horizon.pulsar.testutils.MockHelper;
+import io.micrometer.core.instrument.Counter;
+import io.micrometer.core.instrument.MeterRegistry;
+import io.micrometer.core.instrument.Tags;
 import lombok.extern.slf4j.Slf4j;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -39,6 +42,7 @@
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 
+import static de.telekom.horizon.pulsar.testutils.MockHelper.metricsHelper;
 import static org.awaitility.Awaitility.await;
 import static org.junit.jupiter.api.Assertions.*;
 import static org.mockito.Mockito.*;
@@ -59,7 +63,6 @@ void setupSseServiceTest() {
         MockHelper.init();
 
         var sseTask = new SseTask(sseTaskStateContainerMock, eventMessageSupplierMock, MockHelper.openConnectionGaugeValue, MockHelper.sseTaskFactory);
-
         sseTaskSpy = spy(sseTask);
     }
 
@@ -108,6 +111,12 @@ void testRun() throws IOException, InterruptedException {
         // Used for verifying the timout worked
         var started = Instant.now();
 
+        var counterMock = Mockito.mock(Counter.class);
+        var registryMock = Mockito.mock(MeterRegistry.class);
+        when(registryMock.counter(any(), any(Tags.class))).thenReturn(counterMock);
+        when(metricsHelper.buildTagsFromSubscriptionEventMessage(any())).thenReturn(Tags.empty());
+        when(metricsHelper.getRegistry()).thenReturn(registryMock);
+
         // PUBLIC METHOD WE WANT TO TEST
         sseTaskSpy.run();
 
@@ -191,6 +200,12 @@ void testTerminateConnection() throws InterruptedException, IOException {
         var succeededFuture = CompletableFuture.completedFuture(sendResult);
         when(eventWriterMock.send(anyString(), notNull(), any())).thenReturn(succeededFuture);
 
+        var counterMock = Mockito.mock(Counter.class);
+        var registryMock = Mockito.mock(MeterRegistry.class);
+        when(registryMock.counter(any(), any(Tags.class))).thenReturn(counterMock);
+        when(metricsHelper.buildTagsFromSubscriptionEventMessage(any())).thenReturn(Tags.empty());
+        when(metricsHelper.getRegistry()).thenReturn(registryMock);
+
         sseTaskSpy.run();
 
         var reachedZero = latch.await(10000, TimeUnit.MILLISECONDS);
@@ -243,6 +258,12 @@ void testTerminateConnectionThroughMaxNumberStreamLimit() throws IOException {
         var succeededFuture = CompletableFuture.completedFuture(sendResult);
         when(eventWriterMock.send(anyString(), notNull(), any())).thenReturn(succeededFuture);
 
+        var counterMock = Mockito.mock(Counter.class);
+        var registryMock = Mockito.mock(MeterRegistry.class);
+        when(registryMock.counter(any(), any(Tags.class))).thenReturn(counterMock);
+        when(metricsHelper.buildTagsFromSubscriptionEventMessage(any())).thenReturn(Tags.empty());
+        when(metricsHelper.getRegistry()).thenReturn(registryMock);
+
         sseTaskSpy.run();
 
         verify(emitterMock, times(maxNumberLimit)).send(anyString());
@@ -292,6 +313,12 @@ void testTerminateConnectionThroughMaxByteStreamLimit() throws IOException {
         var succeededFuture = CompletableFuture.completedFuture(sendResult);
         when(eventWriterMock.send(anyString(), notNull(), any())).thenReturn(succeededFuture);
 
+        var counterMock = Mockito.mock(Counter.class);
+        var registryMock = Mockito.mock(MeterRegistry.class);
+        when(registryMock.counter(any(), any(Tags.class))).thenReturn(counterMock);
+        when(metricsHelper.buildTagsFromSubscriptionEventMessage(any())).thenReturn(Tags.empty());
+        when(metricsHelper.getRegistry()).thenReturn(registryMock);
+
         sseTaskSpy.run();
 
         ArgumentCaptor<String> jsonCaptor = ArgumentCaptor.forClass(String.class);
@@ -348,6 +375,12 @@ void testTerminateConnectionThroughMaxMinutesStreamLimit() throws IOException {
         var succeededFuture = CompletableFuture.completedFuture(sendResult);
         when(eventWriterMock.send(anyString(), notNull(), any())).thenReturn(succeededFuture);
 
+        var counterMock = Mockito.mock(Counter.class);
+        var registryMock = Mockito.mock(MeterRegistry.class);
+        when(registryMock.counter(any(), any(Tags.class))).thenReturn(counterMock);
+        when(metricsHelper.buildTagsFromSubscriptionEventMessage(any())).thenReturn(Tags.empty());
+        when(metricsHelper.getRegistry()).thenReturn(registryMock);
+
         sseTaskSpy.run();
 
         assertEquals(maxMinutes, ChronoUnit.MINUTES.between(sseTaskSpy.getStartTime(), sseTaskSpy.getStopTime()));

src/test/java/de/telekom/horizon/pulsar/testutils/MockHelper.java

@@ -10,6 +10,7 @@
 import de.telekom.eni.pandora.horizon.cache.service.DeDuplicationService;
 import de.telekom.eni.pandora.horizon.kafka.config.KafkaProperties;
 import de.telekom.eni.pandora.horizon.kafka.event.EventWriter;
+import de.telekom.eni.pandora.horizon.metrics.HorizonMetricsHelper;
 import de.telekom.eni.pandora.horizon.model.db.Coordinates;
 import de.telekom.eni.pandora.horizon.model.db.PartialEvent;
 import de.telekom.eni.pandora.horizon.model.db.State;
@@ -62,6 +63,7 @@ public class MockHelper {
     public static Environment environment;
     public static ResponseBodyEmitter emitter;
     public static TokenService tokenService;
+    public static HorizonMetricsHelper metricsHelper;
 
     public static DeDuplicationService deDuplicationService;
 
@@ -85,6 +87,7 @@ public static void init() {
         subscriberCache = mock(SubscriberCache.class);
         pulsarConfig = mock(PulsarConfig.class);
         messageStateMongoRepo = mock(MessageStateMongoRepo.class);
+        metricsHelper = mock(HorizonMetricsHelper.class);
         tracingHelper = mock(HorizonTracer.class);
         environment = mock(Environment.class);
         emitter = mock(ResponseBodyEmitter.class);
@@ -99,7 +102,7 @@ public static void init() {
         lenient().when(pulsarConfig.getQueueCapacity()).thenReturn(100);
 
         kafkaPicker = new KafkaPicker(kafkaTemplate);
-        sseTaskFactory = new SseTaskFactory(pulsarConfig, connectionCache, connectionGaugeCache, eventWriter, kafkaPicker, messageStateMongoRepo, deDuplicationService, tracingHelper);
+        sseTaskFactory = new SseTaskFactory(pulsarConfig, connectionCache, connectionGaugeCache, eventWriter, kafkaPicker, messageStateMongoRepo, deDuplicationService, metricsHelper, tracingHelper);
     }
 
     public static SubscriptionEventMessage createSubscriptionEventMessageForTesting(DeliveryType deliveryType, boolean withAdditionalFields) {