Revise documentation for cache infrastructure setup

Closes gh-28250

framework-docs/modules/ROOT/pages/integration/cache/annotations.adoc

@@ -424,10 +424,13 @@ Placing this annotation on the class does not turn on any caching operation.
 An operation-level customization always overrides a customization set on `@CacheConfig`.
 Therefore, this gives three levels of customizations for each cache operation:
 
-* Globally configured, available for `CacheManager`, `KeyGenerator`.
+* Globally configured, e.g. through `CachingConfigurer`: see next section.
 * At the class level, using `@CacheConfig`.
 * At the operation level.
 
+NOTE: Provider-specific settings are typically available on the `CacheManager` bean,
+e.g. on `CaffeineCacheManager`. These are effectively also global.
+
 
 [[cache-annotation-enable]]
 == Enabling Caching Annotations
@@ -446,6 +449,13 @@ To enable caching annotations add the annotation `@EnableCaching` to one of your
 	@Configuration
 	@EnableCaching
 	public class AppConfig {
+
+		@Bean
+		CacheManager cacheManager() {
+			CaffeineCacheManager cacheManager = new CaffeineCacheManager();
+			cacheManager.setCacheSpecification(...);
+			return cacheManager;
+		}
 	}
 ----
 
@@ -460,7 +470,11 @@ Alternatively, for XML configuration you can use the `cache:annotation-driven` e
 			http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
 			http://www.springframework.org/schema/cache https://www.springframework.org/schema/cache/spring-cache.xsd">
 
-			<cache:annotation-driven/>
+		<cache:annotation-driven/>
+
+		<bean id="cacheManager" class="org.springframework.cache.caffeine.CaffeineCacheManager">
+			<property name="cacheSpecification" value="..."/>
+		</bean>
 	</beans>
 ----
 

spring-context/src/main/java/org/springframework/cache/annotation/CachingConfigurer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -24,8 +24,8 @@ import org.springframework.lang.Nullable;
 
 /**
  * Interface to be implemented by @{@link org.springframework.context.annotation.Configuration
- * Configuration} classes annotated with @{@link EnableCaching} that wish or need to
- * specify explicitly how caches are resolved and how keys are generated for annotation-driven
+ * Configuration} classes annotated with @{@link EnableCaching} that wish or need to specify
+ * explicitly how caches are resolved and how keys are generated for annotation-driven
  * cache management.
  *
  * <p>See @{@link EnableCaching} for general examples and context; see

spring-context/src/main/java/org/springframework/cache/annotation/EnableCaching.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -141,11 +141,8 @@ import org.springframework.core.Ordered;
  * must be provided explicitly. Return {@code null} or {@code new SimpleKeyGenerator()}
  * from this method if no customization is necessary.
  *
- * <p>{@link CachingConfigurer} offers additional customization options: it is recommended
- * to extend from {@link org.springframework.cache.annotation.CachingConfigurerSupport
- * CachingConfigurerSupport} that provides a default implementation for all methods which
- * can be useful if you do not need to customize everything. See {@link CachingConfigurer}
- * Javadoc for further details.
+ * <p>{@link CachingConfigurer} offers additional customization options:
+ * see the {@link CachingConfigurer} javadoc for further details.
  *
  * <p>The {@link #mode} attribute controls how advice is applied: If the mode is
  * {@link AdviceMode#PROXY} (the default), then the other attributes control the behavior