move consumers to new sub-project

core/build.gradle.kts

@@ -4,7 +4,10 @@ version = "single-version"
 dependencies {
     implementation(project(":db"))
 
+    implementation(rootProject.libs.spring.boot.starter.actuator)
     implementation(rootProject.libs.spring.boot.starter.jdbc)
     implementation(rootProject.libs.spring.boot.starter.validation)
     implementation(rootProject.libs.json.schema.validator)
+
+    testImplementation(rootProject.libs.spring.boot.starter.actuatorAutoconfigure)
 }

core/src/main/kotlin/com/github/dannecron/demo/core/services/metrics/MetricSender.kt

@@ -0,0 +1,5 @@
+package com.github.dannecron.demo.core.services.metrics
+
+interface MetricsSender {
+    fun incrementConsumerCityCreate()
+}

core/src/main/kotlin/com/github/dannecron/demo/core/services/metrics/MetricSenderImpl.kt

@@ -0,0 +1,18 @@
+package com.github.dannecron.demo.core.services.metrics
+
+import io.micrometer.core.instrument.Counter
+import io.micrometer.core.instrument.MeterRegistry
+import org.springframework.stereotype.Service
+
+@Service
+class MetricsSenderImpl(
+    metricRegistry: MeterRegistry,
+) : MetricsSender {
+    private val consumerCityCreateCounter = Counter.builder("kafka_consumer_city_create")
+        .description("consumed created city event")
+        .register(metricRegistry)
+
+    override fun incrementConsumerCityCreate() {
+        consumerCityCreateCounter.increment()
+    }
+}