apply review

spring-cloud-netflix-eureka-server/src/test/java/org/springframework/cloud/netflix/eureka/server/EurekaInstanceMonitorWithCustomTagsProviderTests.java

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+/*
+ * Copyright 2013-2024 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.netflix.eureka.server;
+
+import java.util.Map;
+
+import com.netflix.appinfo.InstanceInfo;
+import io.micrometer.core.instrument.MeterRegistry;
+import io.micrometer.core.instrument.Tags;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.cloud.netflix.eureka.server.metrics.EurekaInstanceTagsProvider;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.cloud.netflix.eureka.server.EurekaInstanceFixture.getInstanceInfo;
+import static org.springframework.cloud.netflix.eureka.server.EurekaInstanceFixture.getLeaseInfo;
+
+/**
+ * @author Wonchul Heo
+ */
+@SpringBootTest(classes = EurekaInstanceMonitorWithCustomTagsProviderTests.Application.class,
+		webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT,
+		value = { "spring.application.name=eureka", "eureka.server.metrics.enabled=true" })
+class EurekaInstanceMonitorWithCustomTagsProviderTests {
+
+	private static final String FOO_APP_NAME = "FOO-APP-NAME";
+
+	@Autowired
+	private InstanceRegistry instanceRegistry;
+
+	@Autowired
+	private MeterRegistry meterRegistry;
+
+	private InstanceInfo fooInstanceInfo;
+
+	private InstanceInfo fooInstanceInfo2;
+
+	@BeforeEach
+	void setup() {
+		instanceRegistry.clearRegistry();
+		meterRegistry.clear();
+		fooInstanceInfo = getInstanceInfo(FOO_APP_NAME, "my-host-name", "my-host-name:8008", 8008, getLeaseInfo());
+		fooInstanceInfo2 = getInstanceInfo(FOO_APP_NAME, "my-host-name", "my-host-name:8009", 8009, getLeaseInfo());
+	}
+
+	@Test
+	void testNoRegistration() {
+		assertThat(meterRegistry.find("eureka.server.instances").gauge()).isNull();
+	}
+
+	@Test
+	void testMultipleRegistrations() {
+		instanceRegistry.register(fooInstanceInfo, false);
+		instanceRegistry.register(fooInstanceInfo2, false);
+
+		final Map<Tags, Long> counts = Map.of(tags(fooInstanceInfo), 1L, tags(fooInstanceInfo2), 1L);
+		assertEurekaInstance(counts);
+	}
+
+	private static Tags tags(InstanceInfo instanceInfo) {
+		return Tags.of("port", String.valueOf(instanceInfo.getPort()));
+	}
+
+	private void assertEurekaInstance(Map<Tags, Long> meterRegistryCounts) {
+		meterRegistryCounts.forEach((tags,
+				count) -> assertThat((long) meterRegistry.get("eureka.server.instances").tags(tags).gauge().value())
+						.isEqualTo(count));
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@EnableAutoConfiguration
+	@EnableEurekaServer
+	protected static class Application {
+
+		@Bean
+		EurekaInstanceTagsProvider customEurekaInstanceTagsProvider() {
+			return instanceInfo -> Tags.of("port", String.valueOf(instanceInfo.getPort()));
+		}
+
+	}
+
+}