Fix configureGlobal on SpringBootApplication

Fixes gh-2473

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/BootGlobalAuthenticationConfiguration.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright 2012-2015 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
+ *
+ *      http://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.autoconfigure.security;
+
+import java.util.Map;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
+import org.springframework.security.config.annotation.authentication.configuration.AuthenticationConfiguration;
+import org.springframework.security.config.annotation.authentication.configurers.GlobalAuthenticationConfigurerAdapter;
+
+/**
+ * This works with the {@link AuthenticationConfiguration} to ensure that users are able to use:
+ *
+ * <pre>
+ * public void configureGlobal(AuthenticationManagerBuilder auth) {
+ *     ...
+ * }
+ * </pre>
+ *
+ * within their classes annotated with {{@EnableAutoConfiguration}} or use {{@SpringBootApplication}}.
+ *
+ * @author Rob Winch
+ */
+@Configuration
+@ConditionalOnClass(GlobalAuthenticationConfigurerAdapter.class)
+public class BootGlobalAuthenticationConfiguration {
+
+	@Bean
+	public static BootGlobalAuthenticationConfigurationAdapter bootGlobalAuthenticationConfigurationAdapter(ApplicationContext context) {
+		return new BootGlobalAuthenticationConfigurationAdapter(context);
+	}
+
+	private static class BootGlobalAuthenticationConfigurationAdapter extends GlobalAuthenticationConfigurerAdapter {
+		private final ApplicationContext context;
+		private static final Log logger = LogFactory.getLog(BootGlobalAuthenticationConfiguration.class);
+
+		public BootGlobalAuthenticationConfigurationAdapter(ApplicationContext context) {
+			this.context = context;
+		}
+
+		@Override
+		public void init(AuthenticationManagerBuilder auth) {
+			Map<String, Object> beansWithAnnotation = context.getBeansWithAnnotation(EnableAutoConfiguration.class);
+			if(logger.isDebugEnabled()) {
+				logger.debug("Eagerly initializing " + beansWithAnnotation);
+			}
+		}
+	}
+}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/SecurityAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2014 the original author or authors.
+ * Copyright 2012-2015 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.
@@ -49,7 +49,8 @@ import org.springframework.security.config.annotation.web.configuration.WebSecur
 		GlobalAuthenticationConfigurerAdapter.class })
 @EnableConfigurationProperties
 @Import({ SpringBootWebSecurityConfiguration.class,
-		AuthenticationManagerConfiguration.class })
+		AuthenticationManagerConfiguration.class,
+		BootGlobalAuthenticationConfiguration.class})
 public class SecurityAutoConfiguration {
 
 	@Bean