Order EmbeddedServletContainerCustomizers

Add Ordered interface to all EmbeddedServletContainerCustomizers with
a value of 0. Prior to this commit it was difficult for a user to
define a customizer that would be applied before ours, even if they
implemented Ordered or added @Order annotations.

Fixes gh-2123

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/EndpointWebMvcChildContextConfiguration.java

@@ -50,6 +50,7 @@ import org.springframework.boot.context.embedded.EmbeddedServletContainerCustomi
 import org.springframework.boot.context.embedded.ErrorPage;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.core.Ordered;
 import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
 import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
 import org.springframework.web.servlet.DispatcherServlet;
@@ -79,7 +80,7 @@ public class EndpointWebMvcChildContextConfiguration {
 
 	@Configuration
 	protected static class ServerCustomization implements
-			EmbeddedServletContainerCustomizer {
+			EmbeddedServletContainerCustomizer, Ordered {
 
 		@Value("${error.path:/error}")
 		private String errorPath = "/error";
@@ -93,6 +94,11 @@ public class EndpointWebMvcChildContextConfiguration {
 
 		private ServerProperties server;
 
+		@Override
+		public int getOrder() {
+			return 0;
+		}
+
 		@Override
 		public void customize(ConfigurableEmbeddedServletContainer container) {
 			if (this.managementServerProperties == null) {

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ErrorMvcAutoConfiguration.java

@@ -70,7 +70,8 @@ import org.springframework.web.util.HtmlUtils;
 // available
 @AutoConfigureBefore(WebMvcAutoConfiguration.class)
 @Configuration
-public class ErrorMvcAutoConfiguration implements EmbeddedServletContainerCustomizer {
+public class ErrorMvcAutoConfiguration implements EmbeddedServletContainerCustomizer,
+		Ordered {
 
 	@Value("${error.path:/error}")
 	private String errorPath = "/error";
@@ -78,6 +79,11 @@ public class ErrorMvcAutoConfiguration implements EmbeddedServletContainerCustom
 	@Autowired
 	private ServerProperties properties;
 
+	@Override
+	public int getOrder() {
+		return 0;
+	}
+
 	@Bean
 	@ConditionalOnMissingBean(value = ErrorAttributes.class, search = SearchStrategy.CURRENT)
 	public DefaultErrorAttributes errorAttributes() {

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ServerProperties.java

@@ -43,6 +43,7 @@ import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletCon
 import org.springframework.boot.context.embedded.undertow.UndertowEmbeddedServletContainerFactory;
 import org.springframework.boot.context.properties.ConfigurationProperties;
 import org.springframework.boot.context.properties.NestedConfigurationProperty;
+import org.springframework.core.Ordered;
 import org.springframework.util.StringUtils;
 
 /**
@@ -56,7 +57,7 @@ import org.springframework.util.StringUtils;
  * @author Ivan Sopov
  */
 @ConfigurationProperties(prefix = "server", ignoreUnknownFields = false)
-public class ServerProperties implements EmbeddedServletContainerCustomizer {
+public class ServerProperties implements EmbeddedServletContainerCustomizer, Ordered {
 
 	/**
 	 * Server HTTP port.
@@ -96,6 +97,11 @@ public class ServerProperties implements EmbeddedServletContainerCustomizer {
 	 */
 	private final Map<String, String> contextParameters = new HashMap<String, String>();
 
+	@Override
+	public int getOrder() {
+		return 0;
+	}
+
 	public Tomcat getTomcat() {
 		return this.tomcat;
 	}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ServerPropertiesAutoConfiguration.java

@@ -28,6 +28,7 @@ import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextAware;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.core.Ordered;
 import org.springframework.util.Assert;
 import org.springframework.util.StringUtils;
 
@@ -41,10 +42,15 @@ import org.springframework.util.StringUtils;
 @EnableConfigurationProperties
 @ConditionalOnWebApplication
 public class ServerPropertiesAutoConfiguration implements ApplicationContextAware,
-		EmbeddedServletContainerCustomizer {
+		EmbeddedServletContainerCustomizer, Ordered {
 
 	private ApplicationContext applicationContext;
 
+	@Override
+	public int getOrder() {
+		return 0;
+	}
+
 	@Bean
 	@ConditionalOnMissingBean(search = SearchStrategy.CURRENT)
 	public ServerProperties serverProperties() {

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/websocket/WebSocketContainerCustomizer.java

@@ -22,6 +22,7 @@ import org.springframework.boot.context.embedded.ConfigurableEmbeddedServletCont
 import org.springframework.boot.context.embedded.EmbeddedServletContainerCustomizer;
 import org.springframework.boot.context.embedded.EmbeddedServletContainerFactory;
 import org.springframework.boot.context.web.NonEmbeddedServletContainerFactory;
+import org.springframework.core.Ordered;
 import org.springframework.core.ResolvableType;
 
 /**
@@ -34,10 +35,15 @@ import org.springframework.core.ResolvableType;
  * @since 1.2.0
  */
 public abstract class WebSocketContainerCustomizer<T extends EmbeddedServletContainerFactory>
-		implements EmbeddedServletContainerCustomizer {
+		implements EmbeddedServletContainerCustomizer, Ordered {
 
 	private Log logger = LogFactory.getLog(getClass());
 
+	@Override
+	public int getOrder() {
+		return 0;
+	}
+
 	@SuppressWarnings("unchecked")
 	@Override
 	public void customize(ConfigurableEmbeddedServletContainer container) {