Register error pages in a consistent way regardless of the use of an embedded servlet container.

Details: https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-1.4-Release-Notes#errorpageregistry

Addressed to #413

No functional changes.

Author: php-coder

src/main/java/ru/mystamps/web/support/spring/boot/ApplicationBootstrap.java

@@ -38,7 +38,7 @@
 	DispatcherServletContext.class,
 	ThymeleafViewResolverInitializingBean.class,
 	JettyServletContainerCustomizer.class,
-	ErrorPagesServletContainerCustomizer.class
+	ErrorPagesCustomizer.class
 })
 public class ApplicationBootstrap {
 

src/main/java/ru/mystamps/web/support/spring/boot/ErrorPagesServletContainerCustomizer.java renamed to src/main/java/ru/mystamps/web/support/spring/boot/ErrorPagesCustomizer.java

@@ -20,20 +20,22 @@
 import org.springframework.context.annotation.Configuration;
 import org.springframework.http.HttpStatus;
 
-import org.springframework.boot.context.embedded.ConfigurableEmbeddedServletContainer;
-import org.springframework.boot.context.embedded.EmbeddedServletContainerCustomizer;
 import org.springframework.boot.web.servlet.ErrorPage;
+import org.springframework.boot.web.servlet.ErrorPageRegistrar;
+import org.springframework.boot.web.servlet.ErrorPageRegistry;
 
 import ru.mystamps.web.Url;
 
 @Configuration
-public class ErrorPagesServletContainerCustomizer implements EmbeddedServletContainerCustomizer {
-	
+public class ErrorPagesCustomizer implements ErrorPageRegistrar {
+
 	@Override
-	public void customize(ConfigurableEmbeddedServletContainer container) {
-		container.addErrorPages(new ErrorPage(HttpStatus.FORBIDDEN, Url.FORBIDDEN_PAGE));
-		container.addErrorPages(new ErrorPage(HttpStatus.NOT_FOUND, Url.NOT_FOUND_PAGE));
-		container.addErrorPages(new ErrorPage(Exception.class, Url.INTERNAL_ERROR_PAGE));
+	public void registerErrorPages(ErrorPageRegistry registry) {
+		registry.addErrorPages(
+			new ErrorPage(HttpStatus.FORBIDDEN, Url.FORBIDDEN_PAGE),
+			new ErrorPage(HttpStatus.NOT_FOUND, Url.NOT_FOUND_PAGE),
+			new ErrorPage(Exception.class, Url.INTERNAL_ERROR_PAGE)
+		);
 	}
 
 }