Merge pull request #24095 from artembilan

* gh-24095:
  Polish "Ensure that MeterRegistry bean is defined before SI looks for it"
  Ensure that MeterRegistry bean is defined before SI looks for it

Closes gh-24095

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/integration/IntegrationMetricsAutoConfiguration.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2012-2020 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.boot.actuate.autoconfigure.metrics.integration;
+
+import io.micrometer.core.instrument.MeterRegistry;
+
+import org.springframework.boot.actuate.autoconfigure.metrics.CompositeMeterRegistryAutoConfiguration;
+import org.springframework.boot.actuate.autoconfigure.metrics.MetricsAutoConfiguration;
+import org.springframework.boot.autoconfigure.AutoConfigureAfter;
+import org.springframework.boot.autoconfigure.AutoConfigureBefore;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.integration.IntegrationAutoConfiguration;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * {@link EnableAutoConfiguration Auto-configuration} for Spring Integration's metrics.
+ * Orders auto-configuration classes to ensure that the {@link MeterRegistry} bean has
+ * been defined before Spring Integration's Micrometer support queries the bean factory
+ * for it.
+ *
+ * @author Andy Wilkinson
+ */
+@AutoConfigureAfter({ MetricsAutoConfiguration.class, CompositeMeterRegistryAutoConfiguration.class })
+@AutoConfigureBefore(IntegrationAutoConfiguration.class)
+@Configuration(proxyBeanMethods = false)
+class IntegrationMetricsAutoConfiguration {
+
+}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/integration/package-info.java

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2012-2019 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.
+ */
+
+/**
+ * Auto-configuration for Spring Integration metrics.
+ */
+package org.springframework.boot.actuate.autoconfigure.metrics.integration;

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/resources/META-INF/spring.factories

@@ -65,6 +65,7 @@ org.springframework.boot.actuate.autoconfigure.metrics.export.signalfx.SignalFxM
 org.springframework.boot.actuate.autoconfigure.metrics.export.simple.SimpleMetricsExportAutoConfiguration,\
 org.springframework.boot.actuate.autoconfigure.metrics.export.statsd.StatsdMetricsExportAutoConfiguration,\
 org.springframework.boot.actuate.autoconfigure.metrics.export.wavefront.WavefrontMetricsExportAutoConfiguration,\
+org.springframework.boot.actuate.autoconfigure.metrics.integration.IntegrationMetricsAutoConfiguration,\
 org.springframework.boot.actuate.autoconfigure.metrics.jdbc.DataSourcePoolMetricsAutoConfiguration,\
 org.springframework.boot.actuate.autoconfigure.metrics.jersey.JerseyServerMetricsAutoConfiguration,\
 org.springframework.boot.actuate.autoconfigure.metrics.orm.jpa.HibernateMetricsAutoConfiguration,\

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/metrics/integration/IntegrationMetricsAutoConfigurationTests.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2012-2020 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.boot.actuate.autoconfigure.metrics.integration;
+
+import io.micrometer.core.instrument.Gauge;
+import io.micrometer.core.instrument.MeterRegistry;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.boot.actuate.autoconfigure.integration.IntegrationGraphEndpointAutoConfiguration;
+import org.springframework.boot.actuate.autoconfigure.metrics.amqp.RabbitMetricsAutoConfiguration;
+import org.springframework.boot.actuate.autoconfigure.metrics.test.MetricsRun;
+import org.springframework.boot.autoconfigure.AutoConfigurations;
+import org.springframework.boot.autoconfigure.integration.IntegrationAutoConfiguration;
+import org.springframework.boot.test.context.runner.ApplicationContextRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link RabbitMetricsAutoConfiguration}.
+ *
+ * @author Artem Bilan
+ */
+class IntegrationMetricsAutoConfigurationTests {
+
+	private final ApplicationContextRunner contextRunner = new ApplicationContextRunner()
+			.withConfiguration(AutoConfigurations.of(IntegrationAutoConfiguration.class,
+					IntegrationGraphEndpointAutoConfiguration.class, IntegrationMetricsAutoConfiguration.class))
+			.with(MetricsRun.simple()).withPropertyValues("management.metrics.tags.someTag=someValue");
+
+	@Test
+	void integrationMetersAreInstrumented() {
+		this.contextRunner.run((context) -> {
+			MeterRegistry registry = context.getBean(MeterRegistry.class);
+			Gauge gauge = registry.get("spring.integration.channels").tag("someTag", "someValue").gauge();
+			assertThat(gauge).isNotNull().extracting(Gauge::value).isEqualTo(2.0);
+		});
+	}
+
+}