Delay initialization AuthenticationProvider in Global Authentication

Author: kse-music

config/src/main/java/org/springframework/security/config/annotation/authentication/configuration/InitializeAuthenticationProviderBeanManagerConfigurer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2024 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.
@@ -16,8 +16,7 @@
 
 package org.springframework.security.config.annotation.authentication.configuration;
 
-import java.util.ArrayList;
-import java.util.List;
+import java.util.Arrays;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
@@ -63,62 +62,24 @@ public void configure(AuthenticationManagerBuilder auth) {
 			if (auth.isConfigured()) {
 				return;
 			}
-			List<BeanWithName<AuthenticationProvider>> authenticationProviders = getBeansWithName(
-					AuthenticationProvider.class);
-			if (authenticationProviders.isEmpty()) {
+			String[] beanNames = InitializeAuthenticationProviderBeanManagerConfigurer.this.context
+				.getBeanNamesForType(AuthenticationProvider.class);
+			if (beanNames.length == 0) {
 				return;
 			}
-			else if (authenticationProviders.size() > 1) {
-				List<String> beanNames = authenticationProviders.stream().map(BeanWithName::getName).toList();
+			else if (beanNames.length > 1) {
 				this.logger.info(LogMessage.format("Found %s AuthenticationProvider beans, with names %s. "
 						+ "Global Authentication Manager will not be configured with AuthenticationProviders. "
 						+ "Consider publishing a single AuthenticationProvider bean, or wiring your Providers directly "
-						+ "using the DSL.", authenticationProviders.size(), beanNames));
+						+ "using the DSL.", beanNames.length, Arrays.toString(beanNames)));
 				return;
 			}
-			AuthenticationProvider authenticationProvider = authenticationProviders.get(0).getBean();
-			String authenticationProviderBeanName = authenticationProviders.get(0).getName();
-
+			AuthenticationProvider authenticationProvider = InitializeAuthenticationProviderBeanManagerConfigurer.this.context
+				.getBean(beanNames[0], AuthenticationProvider.class);
 			auth.authenticationProvider(authenticationProvider);
 			this.logger.info(LogMessage.format(
 					"Global AuthenticationManager configured with AuthenticationProvider bean with name %s",
-					authenticationProviderBeanName));
-		}
-
-		/**
-		 * @return a list of beans of the requested class, along with their names. If
-		 * there are no registered beans of that type, the list is empty.
-		 */
-		private <T> List<BeanWithName<T>> getBeansWithName(Class<T> type) {
-			List<BeanWithName<T>> beanWithNames = new ArrayList<>();
-			String[] beanNames = InitializeAuthenticationProviderBeanManagerConfigurer.this.context
-				.getBeanNamesForType(type);
-			for (String beanName : beanNames) {
-				T bean = InitializeAuthenticationProviderBeanManagerConfigurer.this.context.getBean(beanName, type);
-				beanWithNames.add(new BeanWithName<T>(bean, beanName));
-			}
-			return beanWithNames;
-		}
-
-		static class BeanWithName<T> {
-
-			private final T bean;
-
-			private final String name;
-
-			BeanWithName(T bean, String name) {
-				this.bean = bean;
-				this.name = name;
-			}
-
-			T getBean() {
-				return this.bean;
-			}
-
-			String getName() {
-				return this.name;
-			}
-
+					beanNames[0]));
 		}
 
 	}