[bs-14] Ensure all servlet context initializers are called

Misuse of TreeSet in EmbeddedWebApplicationContext corrected
(use List and Comparator instead of TreeSet).

[Fixes #48055339]

spring-bootstrap/src/main/java/org/springframework/bootstrap/context/embedded/EmbeddedWebApplicationContext.java

@@ -18,13 +18,12 @@ package org.springframework.bootstrap.context.embedded;
 
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.Comparator;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map.Entry;
 import java.util.Set;
-import java.util.SortedSet;
-import java.util.TreeSet;
 
 import javax.servlet.Filter;
 import javax.servlet.Servlet;
@@ -194,7 +193,7 @@ public class EmbeddedWebApplicationContext extends GenericWebApplicationContext
 
 		if (initializers.isEmpty()) {
 
-			SortedSet<Entry<String, Servlet>> servletBeans = getOrderedBeansOfType(Servlet.class);
+			List<Entry<String, Servlet>> servletBeans = getOrderedBeansOfType(Servlet.class);
 			for (Entry<String, Servlet> servletBean : servletBeans) {
 				String url = (servletBeans.size() == 1 ? "/" : "/"
 						+ servletBean.getKey().toLowerCase() + "/*");
@@ -258,16 +257,17 @@ public class EmbeddedWebApplicationContext extends GenericWebApplicationContext
 		}
 	}
 
-	private <T> SortedSet<Entry<String, T>> getOrderedBeansOfType(Class<T> type) {
-		SortedSet<Entry<String, T>> beans = new TreeSet<Entry<String, T>>(
-				new Comparator<Entry<String, T>>() {
-					@Override
-					public int compare(Entry<String, T> o1, Entry<String, T> o2) {
-						return AnnotationAwareOrderComparator.INSTANCE.compare(
-								o1.getValue(), o2.getValue());
-					}
-				});
+	private <T> List<Entry<String, T>> getOrderedBeansOfType(Class<T> type) {
+		List<Entry<String, T>> beans = new ArrayList<Entry<String, T>>();
+		Comparator<Entry<String, T>> comparator = new Comparator<Entry<String, T>>() {
+			@Override
+			public int compare(Entry<String, T> o1, Entry<String, T> o2) {
+				return AnnotationAwareOrderComparator.INSTANCE.compare(o1.getValue(),
+						o2.getValue());
+			}
+		};
 		beans.addAll(getBeanFactory().getBeansOfType(type, true, true).entrySet());
+		Collections.sort(beans, comparator);
 		return beans;
 	}
 

spring-bootstrap/src/test/java/org/springframework/bootstrap/context/embedded/EmbeddedWebApplicationContextTests.java

@@ -33,8 +33,6 @@ import org.springframework.beans.MutablePropertyValues;
 import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.beans.factory.config.ConstructorArgumentValues;
 import org.springframework.beans.factory.support.RootBeanDefinition;
-import org.springframework.bootstrap.context.embedded.EmbeddedWebApplicationContext;
-import org.springframework.bootstrap.context.embedded.FilterRegistrationBean;
 import org.springframework.context.ApplicationContextException;
 import org.springframework.context.support.AbstractApplicationContext;
 import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
@@ -244,6 +242,22 @@ public class EmbeddedWebApplicationContextTests {
 		ordered.verify(initializer2).onStartup(servletContext);
 	}
 
+	@Test
+	public void unorderedServletContextInitializerBeans() throws Exception {
+		addEmbeddedServletContainerFactoryBean();
+		ServletContextInitializer initializer1 = mock(ServletContextInitializer.class);
+		ServletContextInitializer initializer2 = mock(ServletContextInitializer.class);
+		this.context.registerBeanDefinition("initializerBean2",
+				beanDefinition(initializer2));
+		this.context.registerBeanDefinition("initializerBean1",
+				beanDefinition(initializer1));
+		this.context.refresh();
+		ServletContext servletContext = getEmbeddedServletContainerFactory()
+				.getServletContext();
+		verify(initializer1).onStartup(servletContext);
+		verify(initializer2).onStartup(servletContext);
+	}
+
 	@Test
 	public void servletContextInitializerBeansSkipsServletsAndFilters() throws Exception {
 		addEmbeddedServletContainerFactoryBean();