Hi Spring fans! Welcome to another installment of This Week in Spring! This week I'm in blizzard-besieged Boston, Massachusetts, for the epic Spring One Tour Boston event. Unfortunately, due to this crazy snow storm / blizzard, the event's been postponed one day as we all grapple with the weather. Hope you were able to join the Spring Boot 2.0 launch webinar! If not the replay will be available here and don't forget to check out the launch blog!

Snow or no snow! The show must go on, at least here on the Spring blog, so without further ado:

• The Reactor team is looking for a motivated new engineer to join the team - apply now!
• Spring Cloud Data Flow ninja Gunnar Hillert has just announced Spring Cloud Data Flow 1.4 RC1
• Spring IO Platform Cairo-RC1 lead Andy Wilkinson has just announced the latest updates, including Spring Boot 2.0. Check it out and make sure works as you expect it to.
• I love this post by Spring team legend Stéphane Nicoll on upgrading the Spring Initializr (http://start.spring.io) to Spring Boot 2.0.
• The Spring Data JDBC project has added @Modify for marking queries that perform DML or DDL. Modifying queries will return type boolean or Boolean…

Spring Boot 2 was released recently and the production instance of Spring Initializr (start.spring.io) was upgraded to Spring Boot 2 the same day.

In this post, I'd like to walk you through the process of upgrading a Spring Boot 1.x app to Spring Boot 2.

Release notes and migration guide

A good first step is to get yourself familiar with the main changes in Spring Boot 2 by reading the migration guide and the release notes.

Build upgrade

If you are using Maven and the spring-boot-starter-parent, you need to be aware that several plugins are going to be updated as part of the upgrade. If you're not using the parent, it is worthwhile to inspect your build and upgrade the plugins that you are using. Spring Initializr is built with Maven so the easiest way is to scan spring-boot-dependencies…

Auto-configuration is one of the most powerful features of Spring Boot. Tests for auto-configuration classes usually follow the same pattern. Most tests start up an ApplicationContext with the auto-configuration class under test and depending on the test, also load additional configuration to simulate user behavior. The recurrence of this pattern can add a lot of repetition in the code base.

Spring Boot 2.0 provides a suite of new test helpers for easily configuring an ApplicationContext to simulate auto-configuration test scenarios. The following example configures an ApplicationContextRunner to test the UserServiceAutoConfiguration…

Spring Web Flow 2.5 is now GA and available for use. This release provides an upgrade path for applications using Web Flow to Spring Framework 5 with Java 8, Servlet 3.1, Hibernate 5, Tiles 3, and JSF 2.2 as minimum requirements.

One of the key features in Spring Security 5 is support for writing applications that integrate with services that are secured with OAuth 2. This includes the ability to sign into an application by way of an external service such as Facebook or GitHub.

But with a little bit of extra code, you can also obtain an OAuth 2 access token that can be used to perform authorized requests against the service’s API.

In this article, we’re going to look at how to develop a Spring Boot application that, using Spring Security 5, integrates with Facebook. You can find the complete code for this article at https://github.com/habuma/facebook-security5…

Last fall, a security vulnerability affecting Spring Data REST was discovered. We patched the affected modules and published a CVE. We've seen some recent news about this that's led to confusion. Here's the scoop:

tl;dr:

• There was a security vulnerability allowing arbitrary code execution in Spring Data REST up to version 2.6.8 and 3.0.0.
• This vulnerability has been fixed in the following versions:

-- Spring Data REST 2.6.9 (Ingalls SR9, Oct. 27th, 2017), included in Spring Boot 1.5.9 (Oct, 28th 2017). -- Spring Data REST 3.0.1 (Kay SR1, Oct. 27th 2017), included in Spring Boot 2.0 M6, (Nov…

The Spring Security SAML project has been an integral part of the Spring ecosystem since its inception nearly 9 years ago. This critically important project was born through the incredible effort and contributions of Vladimír Schäfer. I’d like to take the time to personally thank Vladimír and our fantastic community for their tireless work. Without all of their efforts, this project would not be what it is today.

Vladimír, our amazing community, and the Spring engineering team are planning to team up to enhance Spring Security SAML to achieve the following primary goals:

• Ensuring all dependencies are up to date

• Ensure all Spring Security APIs do not expose any dependency APIs

• Graduate Spring Security SAML from an extension into Spring Security proper

…

Hi Spring fans and welcome to another installment of This Week in Spring! As I write this it's early morning Tuesday in Sydney, Australia, where I've been visiting with some of Pivotal's amazing customers, and I'm now preparing for my flight to Dubai, in six short hours, where I'll visit some more of Pivotal's amazing customers. Later this week I'll be in Bangalore, India, for the amazing Agile India conference, and then - early next week on Tuesday - I'll be in Boston, MA for the first SpringOne Tour event. If you're around don't hesitate to say hi, as usual!

This week we've got a lot of…

This week, the software world found out that SAML Vulnerabilities Affecting Multiple Implementations were discovered. If you use Spring Security SAML’s defaults, you are not impacted by this vulnerability.

The underlying implementation that Spring Security SAML uses is Shibboleth’s OpenSAML Java library. The OpenSAML Java implementation was not listed in the libraries that contain the vulnerability (Shibboleth openSAML C++ was vulnerable). However, if the ParserPool has been customized, you may be impacted.

NOT Safe Configurations

Specifically, if the application explicitly sets the BasicParserPool or the StaticBasicParserPool to have ignoreComments = false, it is vulnerable to the…