Remove redundant auto-configuration of SI Micrometer metrics

Spring Integration no longer requires a `MicrometerMetricsFactory` to
support Micrometer metrics so there's nothing for Boot to
auto-configure.

See gh-12287

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

-/*
- * Copyright 2012-2018 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
- *
- *      http://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.export.simple.SimpleMetricsExportAutoConfiguration;
-import org.springframework.boot.autoconfigure.AutoConfigureAfter;
-import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
-import org.springframework.boot.autoconfigure.integration.IntegrationAutoConfiguration;
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.integration.config.EnableIntegration;
-import org.springframework.integration.support.management.micrometer.MicrometerMetricsFactory;
-
-/**
- * {@link EnableAutoConfiguration Auto-configuration} for Spring Integration Micrometer
- * support.
- *
- * @author Phillip Webb
- * @author Gary Russell
- * @since 2.0.0
- */
-@Configuration
-@ConditionalOnClass({ EnableIntegration.class, MeterRegistry.class })
-@AutoConfigureAfter({ IntegrationAutoConfiguration.class,
-		SimpleMetricsExportAutoConfiguration.class })
-@ConditionalOnBean(MeterRegistry.class)
-public class IntegrationMetricsAutoConfiguration {
-
-	@Bean
-	public MicrometerMetricsFactory integrationMicrometerMetricsFactory(
-			MeterRegistry meterRegistry) {
-		return new MicrometerMetricsFactory(meterRegistry);
-	}
-
-}

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

-/*
- * Copyright 2012-2018 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
- *
- *      http://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.
- */
-
-/**
- * Actuator support for Spring Integration metrics.
- */
-package org.springframework.boot.actuate.autoconfigure.metrics.integration;

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

@@ -26,25 +26,19 @@ import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.integration.support.MessageBuilder;
-import org.springframework.integration.support.management.AbstractMessageChannelMetrics;
-import org.springframework.integration.support.management.DefaultMetricsFactory;
-import org.springframework.integration.support.management.MetricsFactory;
 import org.springframework.messaging.Message;
 import org.springframework.messaging.SubscribableChannel;
-import org.springframework.test.util.ReflectionTestUtils;
-
-import static org.assertj.core.api.Assertions.assertThat;
 
 /**
  * Tests for {@link IntegrationMetricsAutoConfiguration}.
  *
  * @author Phillip Webb
+ * @author Gary Russell
  */
 public class IntegrationMetricsAutoConfigurationTests {
 
-	private ApplicationContextRunner contextRunner = new ApplicationContextRunner()
-			.withConfiguration(AutoConfigurations.of(IntegrationAutoConfiguration.class,
-					IntegrationMetricsAutoConfiguration.class))
+	private final ApplicationContextRunner contextRunner = new ApplicationContextRunner()
+			.withConfiguration(AutoConfigurations.of(IntegrationAutoConfiguration.class))
 			.withUserConfiguration(BaseConfiguration.class)
 			.withPropertyValues("spring.jmx.enabled=false");
 
@@ -56,20 +50,7 @@ public class IntegrationMetricsAutoConfigurationTests {
 					SubscribableChannel.class);
 			channel.send(message);
 			MeterRegistry registry = context.getBean(MeterRegistry.class);
-			registry.get("errorChannel.timer").timer();
-			registry.get("errorChannel.errorCounter").counter();
-		});
-	}
-
-	@Test
-	public void autoConfigurationBacksOffWhenHasMetricsFactory() {
-		this.contextRunner.withUserConfiguration(LegacyConfiguration.class)
-				.run((context) -> {
-					SubscribableChannel channel = context.getBean("errorChannel",
-							SubscribableChannel.class);
-					AbstractMessageChannelMetrics metrics = (AbstractMessageChannelMetrics) ReflectionTestUtils
-							.getField(channel, "channelMetrics");
-					assertThat(metrics.getTimer()).isNull();
+			registry.get("spring.integration.send").tag("name", "errorChannel").timer();
 		});
 	}
 
@@ -83,14 +64,4 @@ public class IntegrationMetricsAutoConfigurationTests {
 
 	}
 
-	@Configuration
-	static class LegacyConfiguration {
-
-		@Bean
-		public MetricsFactory legacyMetricsFactory() {
-			return new DefaultMetricsFactory();
-		}
-
-	}
-
 }