Minimal sample with Hazelcast and native-image

See micrometer-metrics/micrometer#5604

build.gradle

@@ -1,15 +1,15 @@
 plugins {
 	id 'java'
-	id 'org.springframework.boot' version '3.3.4'
+	id 'org.springframework.boot' version '3.3.5'
 	id 'io.spring.dependency-management' version '1.1.6'
-	id 'com.gorylenko.gradle-git-properties' version '2.4.2'
+	id 'org.graalvm.buildtools.native' version '0.10.3'
 }
 
 group = 'org.example'
 version = '0.0.1-SNAPSHOT'
 
 java {
-	toolchain { languageVersion = JavaLanguageVersion.of(23) }
+	toolchain { languageVersion = JavaLanguageVersion.of(22) }
 }
 
 springBoot {
@@ -23,8 +23,8 @@ dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-actuator'
 	implementation 'org.springframework.boot:spring-boot-starter-web'
 
-	implementation 'io.micrometer:micrometer-tracing-bridge-brave'
-//	implementation 'io.zipkin.reporter2:zipkin-reporter-brave'
+	implementation 'com.hazelcast:hazelcast-spring'
+
 	runtimeOnly 'io.micrometer:micrometer-registry-prometheus'
 
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'

docker-compose.yml

@@ -0,0 +1,8 @@
+services:
+    hazelcast:
+        container_name: hazelcast
+        image: hazelcast/hazelcast
+        extra_hosts: [ 'host.docker.internal:host-gateway' ]
+        restart: always
+        ports:
+            - 5701:5701

src/main/java/org/example/ecoli/EcoliApplication.java

@@ -1,11 +1,22 @@
 package org.example.ecoli;
 
+import com.hazelcast.client.config.ClientConfig;
+
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cache.annotation.EnableCaching;
+import org.springframework.context.annotation.Bean;
 
+@EnableCaching
 @SpringBootApplication
 public class EcoliApplication {
 	public static void main(String[] args) {
 		SpringApplication.run(EcoliApplication.class, args);
 	}
+
+	@Bean
+	ClientConfig hazelcastClientConfig() {
+		return new ClientConfig();
+	}
+
 }

src/main/java/org/example/ecoli/EcoliRestController.java

@@ -1,82 +1,17 @@
 package org.example.ecoli;
 
-import java.util.List;
-
-import io.micrometer.core.instrument.MeterRegistry;
-import io.micrometer.tracing.Span;
-import io.micrometer.tracing.TraceContext;
-import io.micrometer.tracing.Tracer;
-
+import org.springframework.cache.annotation.Cacheable;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RestController;
 
 @RestController
 public class EcoliRestController {
-	private final MeterRegistry meterRegistry;
-	private final Tracer tracer;
-
-	public EcoliRestController(MeterRegistry meterRegistry, Tracer tracer) {
-		this.meterRegistry = meterRegistry;
-		this.tracer = tracer;
-	}
 
+	@Cacheable("echo")
 	@GetMapping("/echo/{message}")
-	public EchoResponse echo(@PathVariable String message) {
-		return new EchoResponse(message);
+	public String echo(@PathVariable String message) {
+		return message;
 	}
 
-	@GetMapping("/throughput")
-	public ThroughputResponse throughput() {
-		List<String> counters = meterRegistry.find("http.server.requests").timers().stream()
-			.map(timer -> String.format("%s%s %d", timer.getId().getName(), timer.getId().getTags(), timer.count()))
-			.toList();
-		return new ThroughputResponse(counters);
-	}
-
-	@GetMapping("/span")
-	public SpanResponse span() {
-		return new SpanResponse(tracer.currentSpan());
-	}
-
-	public record EchoResponse(String message) {
-	}
-
-	public record ThroughputResponse(List<String> counters) {
-	}
-
-	public static class SpanResponse {
-		private final String traceId;
-		private final String spanId;
-		private final String parentSpanId;
-
-		SpanResponse(Span span) {
-			if (span != null) {
-				TraceContext traceContext = span.context();
-				this.traceId = traceContext.traceId();
-				this.spanId = traceContext.spanId();
-				this.parentSpanId = span.context().parentId();
-			}
-			else {
-				this.traceId = null;
-				this.spanId = null;
-				this.parentSpanId = null;
-			}
-		}
-
-		@SuppressWarnings("unused")
-		public String getTraceId() {
-			return this.traceId;
-		}
-
-		@SuppressWarnings("unused")
-		public String getSpanId() {
-			return this.spanId;
-		}
-
-		@SuppressWarnings("unused")
-		public String getParentSpanId() {
-			return this.parentSpanId;
-		}
-	}
 }

src/main/resources/application.properties

@@ -1,7 +1,3 @@
 spring.application.name=ecoli
 
 management.endpoints.web.exposure.include=*
-management.tracing.sampling.probability=1.0
-management.metrics.distribution.percentiles-histogram.http.server.requests=true
-
-logging.level.org.springframework.web.servlet.DispatcherServlet=DEBUG