Migrate to updated micrometer Tags class

See gh-11575

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/amqp/RabbitMetricsConfiguration.java

@@ -20,7 +20,6 @@ import java.util.Map;
 
 import com.rabbitmq.client.ConnectionFactory;
 import io.micrometer.core.instrument.MeterRegistry;
-import io.micrometer.core.instrument.Tag;
 import io.micrometer.core.instrument.Tags;
 
 import org.springframework.amqp.rabbit.connection.AbstractConnectionFactory;
@@ -66,9 +65,11 @@ public class RabbitMetricsConfiguration {
 
 	private void bindConnectionFactoryToRegistry(String beanName,
 			AbstractConnectionFactory connectionFactory) {
-		Iterable<Tag> tags = Tags.zip("name", getConnectionFactoryName(beanName));
-		new RabbitMetrics(connectionFactory.getRabbitConnectionFactory(), this.metricName,
-				tags).bindTo(this.registry);
+		ConnectionFactory rabbitConnectionFactory = connectionFactory
+				.getRabbitConnectionFactory();
+		String connectionFactoryName = getConnectionFactoryName(beanName);
+		new RabbitMetrics(rabbitConnectionFactory, this.metricName,
+				Tags.of("name", connectionFactoryName)).bindTo(this.registry);
 	}
 
 	/**

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/jdbc/DataSourcePoolMetricsConfiguration.java

@@ -22,7 +22,6 @@ import java.util.Map;
 import javax.sql.DataSource;
 
 import io.micrometer.core.instrument.MeterRegistry;
-import io.micrometer.core.instrument.Tag;
 import io.micrometer.core.instrument.Tags;
 
 import org.springframework.beans.factory.annotation.Autowired;
@@ -68,9 +67,9 @@ public class DataSourcePoolMetricsConfiguration {
 	}
 
 	private void bindDataSourceToRegistry(String beanName, DataSource dataSource) {
-		Iterable<Tag> tags = Tags.zip("name", getDataSourceName(beanName));
+		String dataSourceName = getDataSourceName(beanName);
 		new DataSourcePoolMetrics(dataSource, this.metadataProviders, this.metricName,
-				tags).bindTo(this.registry);
+				Tags.of("name", dataSourceName)).bindTo(this.registry);
 	}
 
 	/**

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/cache/CacheMetricsRegistrar.java

@@ -16,10 +16,7 @@
 
 package org.springframework.boot.actuate.metrics.cache;
 
-import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Collection;
-import java.util.List;
 
 import io.micrometer.core.instrument.MeterRegistry;
 import io.micrometer.core.instrument.Tag;
@@ -69,8 +66,7 @@ public class CacheMetricsRegistrar {
 	 * @return {@code true} if the {@code cache} is supported and was registered
 	 */
 	public boolean bindCacheToRegistry(Cache cache, Tag... tags) {
-		List<Tag> allTags = new ArrayList<>(Arrays.asList(tags));
-		MeterBinder meterBinder = getMeterBinder(cache, allTags);
+		MeterBinder meterBinder = getMeterBinder(cache, Tags.of(tags));
 		if (meterBinder != null) {
 			meterBinder.bindTo(this.registry);
 			return true;
@@ -79,8 +75,8 @@ public class CacheMetricsRegistrar {
 	}
 
 	@SuppressWarnings({ "unchecked", "rawtypes" })
-	private MeterBinder getMeterBinder(Cache cache, Iterable<Tag> tags) {
-		Iterable<Tag> withAdditionalTags = Tags.concat(tags, getAdditionalTags(cache));
+	private MeterBinder getMeterBinder(Cache cache, Tags tags) {
+		tags = tags.and(getAdditionalTags(cache));
 		for (CacheMeterBinderProvider<?> binderProvider : this.binderProviders) {
 			Class<?> cacheType = ResolvableType
 					.forClass(CacheMeterBinderProvider.class, binderProvider.getClass())
@@ -88,7 +84,7 @@ public class CacheMetricsRegistrar {
 			if (cacheType.isInstance(cache)) {
 				try {
 					MeterBinder meterBinder = ((CacheMeterBinderProvider) binderProvider)
-							.getMeterBinder(cache, this.metricName, withAdditionalTags);
+							.getMeterBinder(cache, this.metricName, tags);
 					if (meterBinder != null) {
 						return meterBinder;
 					}
@@ -121,7 +117,7 @@ public class CacheMetricsRegistrar {
 	 * @return a list of additional tags to associate to that {@code cache}.
 	 */
 	protected Iterable<Tag> getAdditionalTags(Cache cache) {
-		return Tags.zip("name", cache.getName());
+		return Tags.of("name", cache.getName());
 	}
 
 }

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

 /*
- * Copyright 2012-2017 the original author or authors.
+ * 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.
@@ -45,7 +45,7 @@ import org.springframework.integration.support.management.PollableChannelManagem
  */
 public class SpringIntegrationMetrics implements MeterBinder, SmartInitializingSingleton {
 
-	private final Iterable<Tag> tags;
+	private final Tags tags;
 
 	private Collection<MeterRegistry> registries = new ArrayList<>();
 
@@ -56,9 +56,9 @@ public class SpringIntegrationMetrics implements MeterBinder, SmartInitializingS
 	}
 
 	public SpringIntegrationMetrics(IntegrationManagementConfigurer configurer,
-			Iterable<Tag> tags) {
+			Iterable<? extends Tag> tags) {
 		this.configurer = configurer;
-		this.tags = tags;
+		this.tags = Tags.of(tags);
 	}
 
 	@Override
@@ -81,7 +81,7 @@ public class SpringIntegrationMetrics implements MeterBinder, SmartInitializingS
 	private void addSourceMetrics(MeterRegistry registry) {
 		for (String source : this.configurer.getSourceNames()) {
 			MessageSourceMetrics sourceMetrics = this.configurer.getSourceMetrics(source);
-			Iterable<Tag> tagsWithSource = Tags.concat(this.tags, "source", source);
+			Iterable<Tag> tagsWithSource = this.tags.and("source", source);
 			registerFunctionCounter(registry, sourceMetrics, tagsWithSource,
 					"spring.integration.source.messages",
 					"The number of successful handler calls",
@@ -93,7 +93,7 @@ public class SpringIntegrationMetrics implements MeterBinder, SmartInitializingS
 		for (String handler : this.configurer.getHandlerNames()) {
 			MessageHandlerMetrics handlerMetrics = this.configurer
 					.getHandlerMetrics(handler);
-			Iterable<Tag> tagsWithHandler = Tags.concat(this.tags, "handler", handler);
+			Iterable<Tag> tagsWithHandler = this.tags.and("handler", handler);
 			registerTimedGauge(registry, handlerMetrics, tagsWithHandler,
 					"spring.integration.handler.duration.max",
 					"The maximum handler duration",
@@ -116,7 +116,7 @@ public class SpringIntegrationMetrics implements MeterBinder, SmartInitializingS
 		for (String channel : this.configurer.getChannelNames()) {
 			MessageChannelMetrics channelMetrics = this.configurer
 					.getChannelMetrics(channel);
-			Iterable<Tag> tagsWithChannel = Tags.concat(this.tags, "channel", channel);
+			Iterable<Tag> tagsWithChannel = this.tags.and("channel", channel);
 			registerFunctionCounter(registry, channelMetrics, tagsWithChannel,
 					"spring.integration.channel.sendErrors",
 					"The number of failed sends (either throwing an exception or rejected by the channel)",

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/web/reactive/server/RouterFunctionMetrics.java

@@ -16,17 +16,17 @@
 
 package org.springframework.boot.actuate.metrics.web.reactive.server;
 
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.Collections;
 import java.util.concurrent.TimeUnit;
 import java.util.function.BiFunction;
 
 import io.micrometer.core.instrument.MeterRegistry;
 import io.micrometer.core.instrument.Tag;
 import io.micrometer.core.instrument.Tags;
+import reactor.core.publisher.Mono;
 
+import org.springframework.util.Assert;
 import org.springframework.web.reactive.function.server.HandlerFilterFunction;
+import org.springframework.web.reactive.function.server.HandlerFunction;
 import org.springframework.web.reactive.function.server.RouterFunction;
 import org.springframework.web.reactive.function.server.ServerRequest;
 import org.springframework.web.reactive.function.server.ServerResponse;
@@ -41,53 +41,53 @@ public class RouterFunctionMetrics {
 
 	private final MeterRegistry registry;
 
-	private BiFunction<ServerRequest, ServerResponse, Collection<Tag>> defaultTags = (
-			ServerRequest request, ServerResponse response) -> response != null
-					? Arrays.asList(method(request), status(response))
-					: Collections.singletonList(method(request));
+	private final BiFunction<ServerRequest, ServerResponse, Iterable<Tag>> defaultTags;
 
 	public RouterFunctionMetrics(MeterRegistry registry) {
+		Assert.notNull(registry, "Registry must not be null");
 		this.registry = registry;
+		this.defaultTags = this::defaultTags;
+	}
+
+	private RouterFunctionMetrics(MeterRegistry registry,
+			BiFunction<ServerRequest, ServerResponse, Iterable<Tag>> defaultTags) {
+		Assert.notNull(registry, "Registry must not be null");
+		Assert.notNull(defaultTags, "DefaultTags must not be null");
+		this.registry = registry;
+		this.defaultTags = defaultTags;
+	}
+
+	private Iterable<Tag> defaultTags(ServerRequest request, ServerResponse response) {
+		if (response == null) {
+			return Tags.of(getMethodTag(request));
+		}
+		return Tags.of(getMethodTag(request), getStatusTag(response));
 	}
 
 	/**
-	 * Configures the default tags.
+	 * Returns a new {@link RouterFunctionMetrics} instance with the specified default
+	 * tags.
 	 * @param defaultTags Generate a list of tags to apply to the timer.
 	 * {@code ServerResponse} may be null.
 	 * @return {@code this} for further configuration
 	 */
 	public RouterFunctionMetrics defaultTags(
-			BiFunction<ServerRequest, ServerResponse, Collection<Tag>> defaultTags) {
-		this.defaultTags = defaultTags;
-		return this;
+			BiFunction<ServerRequest, ServerResponse, Iterable<Tag>> defaultTags) {
+		return new RouterFunctionMetrics(this.registry, defaultTags);
 	}
 
 	public HandlerFilterFunction<ServerResponse, ServerResponse> timer(String name) {
-		return timer(name, Collections.emptyList());
+		return timer(name, Tags.empty());
 	}
 
 	public HandlerFilterFunction<ServerResponse, ServerResponse> timer(String name,
 			String... tags) {
-		return timer(name, Tags.zip(tags));
+		return timer(name, Tags.of(tags));
 	}
 
 	public HandlerFilterFunction<ServerResponse, ServerResponse> timer(String name,
 			Iterable<Tag> tags) {
-		return (request, next) -> {
-			final long start = System.nanoTime();
-			return next.handle(request).doOnSuccess((response) -> {
-				Iterable<Tag> allTags = Tags.concat(tags,
-						this.defaultTags.apply(request, response));
-				this.registry.timer(name, allTags).record(System.nanoTime() - start,
-						TimeUnit.NANOSECONDS);
-			}).doOnError((error) -> {
-				// FIXME how do we get the response under an error condition?
-				Iterable<Tag> allTags = Tags.concat(tags,
-						this.defaultTags.apply(request, null));
-				this.registry.timer(name, allTags).record(System.nanoTime() - start,
-						TimeUnit.NANOSECONDS);
-			});
-		};
+		return new MetricsFilter(name, Tags.of(tags));
 	}
 
 	/**
@@ -95,7 +95,7 @@ public class RouterFunctionMetrics {
 	 * @param request The HTTP request.
 	 * @return A "method" tag whose value is a capitalized method (e.g. GET).
 	 */
-	public static Tag method(ServerRequest request) {
+	public static Tag getMethodTag(ServerRequest request) {
 		return Tag.of("method", request.method().toString());
 	}
 
@@ -104,8 +104,48 @@ public class RouterFunctionMetrics {
 	 * @param response The HTTP response.
 	 * @return A "status" tag whose value is the numeric status code.
 	 */
-	public static Tag status(ServerResponse response) {
+	public static Tag getStatusTag(ServerResponse response) {
 		return Tag.of("status", response.statusCode().toString());
 	}
 
+	/**
+	 * {@link HandlerFilterFunction} to handle calling micrometer.
+	 */
+	private class MetricsFilter
+			implements HandlerFilterFunction<ServerResponse, ServerResponse> {
+
+		private final String name;
+
+		private final Tags tags;
+
+		MetricsFilter(String name, Tags tags) {
+			this.name = name;
+			this.tags = tags;
+		}
+
+		@Override
+		public Mono<ServerResponse> filter(ServerRequest request,
+				HandlerFunction<ServerResponse> next) {
+			long start = System.nanoTime();
+			return next.handle(request).doOnSuccess((response) -> {
+				timer(start, request, response);
+			}).doOnError((error) -> {
+				// FIXME how do we get the response under an error condition?
+				timer(start, request, null);
+			});
+		}
+
+		private Iterable<Tag> getDefaultTags(ServerRequest request,
+				ServerResponse response) {
+			return RouterFunctionMetrics.this.defaultTags.apply(request, response);
+		}
+
+		private void timer(long start, ServerRequest request, ServerResponse response) {
+			Tags allTags = this.tags.and(getDefaultTags(request, response));
+			RouterFunctionMetrics.this.registry.timer(this.name, allTags)
+					.record(System.nanoTime() - start, TimeUnit.NANOSECONDS);
+		}
+
+	}
+
 }

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/web/servlet/WebMvcMetrics.java

@@ -34,7 +34,6 @@ import io.micrometer.core.annotation.Timed;
 import io.micrometer.core.annotation.TimedSet;
 import io.micrometer.core.instrument.LongTaskTimer;
 import io.micrometer.core.instrument.MeterRegistry;
-import io.micrometer.core.instrument.Tag;
 import io.micrometer.core.instrument.Tags;
 import io.micrometer.core.instrument.Timer;
 import org.apache.commons.logging.Log;
@@ -252,7 +251,7 @@ public class WebMvcMetrics {
 
 		private final String name;
 
-		private final Iterable<Tag> extraTags;
+		private final Tags extraTags;
 
 		private final double[] percentiles;
 
@@ -260,14 +259,14 @@ public class WebMvcMetrics {
 
 		TimerConfig(String name, boolean histogram) {
 			this.name = name;
-			this.extraTags = Collections.emptyList();
+			this.extraTags = Tags.empty();
 			this.percentiles = new double[0];
 			this.histogram = histogram;
 		}
 
 		TimerConfig(Timed timed, Supplier<String> name) {
 			this.name = buildName(timed, name);
-			this.extraTags = Tags.zip(timed.extraTags());
+			this.extraTags = Tags.of(timed.extraTags());
 			this.percentiles = timed.percentiles();
 			this.histogram = timed.histogram();
 		}
@@ -285,7 +284,7 @@ public class WebMvcMetrics {
 			return this.name;
 		}
 
-		Iterable<Tag> getExtraTags() {
+		Tags getExtraTags() {
 			return this.extraTags;
 		}
 

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/amqp/RabbitMetricsTests.java

@@ -43,7 +43,7 @@ public class RabbitMetricsTests {
 	public void connectionFactoryWithTagsIsInstrumented() {
 		ConnectionFactory connectionFactory = mockConnectionFactory();
 		SimpleMeterRegistry registry = new SimpleMeterRegistry();
-		new RabbitMetrics(connectionFactory, "test", Tags.zip("env", "prod"))
+		new RabbitMetrics(connectionFactory, "test", Tags.of("env", "prod"))
 				.bindTo(registry);
 		assertThat(registry.get("test.connections").tags("env", "prod").meter())
 				.isNotNull();