Auto-configure observation of Redis with Lettuce

See gh-46975

Signed-off-by: Đặng Minh Dũng <dungdm93@live.com>

module/spring-boot-data-redis/src/main/java/org/springframework/boot/data/redis/autoconfigure/LettuceTracingAutoConfiguration.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2012-present 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.data.redis.autoconfigure;
+
+import io.lettuce.core.RedisClient;
+import io.lettuce.core.tracing.MicrometerTracing;
+import io.micrometer.observation.ObservationRegistry;
+import org.springframework.boot.actuate.autoconfigure.observation.ObservationAutoConfiguration;
+import org.springframework.boot.autoconfigure.AutoConfiguration;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.data.redis.ClientResourcesBuilderCustomizer;
+import org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration;
+import org.springframework.context.annotation.Bean;
+
+/**
+ * Auto-configuration for Lettuce tracing.
+ *
+ * @author Dũng Đăng Minh
+ * @since 4.0.0
+ */
+@AutoConfiguration(
+    before = RedisAutoConfiguration.class,
+    after = ObservationAutoConfiguration.class
+)
+@ConditionalOnClass({RedisClient.class, MicrometerTracing.class, ObservationRegistry.class})
+@ConditionalOnBean(ObservationRegistry.class)
+public final class LettuceTracingAutoConfiguration {
+    /// [lettuce doc](https://redis.github.io/lettuce/advanced-usage/#tracing)
+    @Bean
+    public ClientResourcesBuilderCustomizer lettuceTracing(ObservationRegistry observationRegistry) {
+        return (client) -> client.tracing(new MicrometerTracing(observationRegistry, "Redis"));
+    }
+}

module/spring-boot-data-redis/src/main/resources/META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports

@@ -1,4 +1,5 @@
 org.springframework.boot.data.redis.autoconfigure.DataRedisAutoConfiguration
+org.springframework.boot.data.redis.autoconfigure.LettuceTracingAutoConfiguration
 org.springframework.boot.data.redis.autoconfigure.DataRedisReactiveAutoConfiguration
 org.springframework.boot.data.redis.autoconfigure.DataRedisRepositoriesAutoConfiguration
 org.springframework.boot.data.redis.autoconfigure.health.DataRedisHealthContributorAutoConfiguration