Polish "Improve LDAP auto-configuration conditions"

Closes gh-13143

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/ldap/LdapAutoConfigurationTests.java

@@ -22,6 +22,7 @@ import org.springframework.boot.autoconfigure.AutoConfigurations;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
 import org.springframework.ldap.core.ContextSource;
 import org.springframework.ldap.core.LdapTemplate;
 import org.springframework.ldap.core.support.LdapContextSource;
@@ -120,7 +121,6 @@ public class LdapAutoConfigurationTests {
 							"urls");
 					assertThat(urls).containsExactly("ldap://localhost:389");
 					assertThat(contextSource.isAnonymousReadOnly()).isFalse();
-					context.getBean(PooledContextSource.class);
 				});
 	}
 
@@ -128,6 +128,7 @@ public class LdapAutoConfigurationTests {
 	static class PooledContextSourceConfig {
 
 		@Bean
+		@Primary
 		public PooledContextSource pooledContextSource(
 				LdapContextSource ldapContextSource) {
 			PooledContextSource pooledContextSource = new PooledContextSource(

spring-boot-project/spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc

@@ -4539,6 +4539,11 @@ URLs of your server in your application.properties, as shown in the following ex
 If you need to customize connection settings, you can use the `spring.ldap.base` and
 `spring.ldap.base-environment` properties.
 
+A `LdapContextSource` is auto-configured based on these settings. If you need to customize
+it, for instance to use a `PooledContextSource`, you can still inject the auto-configured
+`LdapContextSource`. Make sure to flag your customized `ContextSource` as `@Primary` so
+that the auto-configured `LdapTemplate` uses it.
+
 
 
 [[boot-features-ldap-spring-data-repositories]]