Hi, Spring fans! In this installment, Josh Long (@starbuxman) talks to Dr. Yordan Karadzhov about instrumenting and visualizing the Linux Kernel, and understanding what's happening from the perspective of the platform, containers, and cloud-native Spring applications.

Hi, Spring fans! Welcome to another installment of This Week in Spring! What a wonderful week it's been and it's only Tuesday! I spoke to folks in Switzerland on Monday, had a few awesome meetings with folks later, then today spoke to folks in Germany in the morning and then folks in APJ (Singapore, mostly) in the evening. And tomorrow, I'm speaking at the JPoint virtual conference about Bootiful Kotlin. I'd love to see you there!

Now then, we've got a ton of things to look at this roundup so let's get to it!

• URL Matching with PathPattern in Spring MVC
• I did a webinar introducing Tazu Wavefront last week that you can watch now - do not miss this!
• I also released an episode of A Bootiful Podcast: Tanzu Wavefront co-founder and VMware Principal Engineer Clement Pang which I highly recommend if you want to learn more about Wavefront and the incredible scale that allows it meet the scale demands of Reddit, Home Depot, and more.
• A great screencast from Matt Raible: Angular Docker with a Big Hug from Spring Boot
• Angular Docker with a Big Hug from Spring Boot | Okta Developer
• …

The recent Spring Framework 5.3 M1 release announcement mentions "Spring MVC comes with PathPattern parsing for efficient URL matching". This post expands on that with more context and detail.

Overview

In Spring applications AntPathMatcher is used to identify classpath, file system, remote, and other resources in Spring configuration. It has also been used in Spring MVC to match URL paths. Over time the use of patterns in web applications grew in number and syntax with AntPathMatcher evolving to meet those needs but some pain points remain without a solution:

1. In web applications, patterns need to be matched many times per request and therefore any gains in performance and efficiency matter. However String pattern matching limits what can be achieved.

2. Choosing the most specific pattern among several that match a request has proven challenging over the years with no simple ways to make it more predictable without impacting other cases.

3. Matching a String path to a String pattern makes it difficult to avoid URI encoding issues. For example should the incoming path be decoded first and then matched? That allows for patterns themselves to be declared without encoded characters, but what if the request path contains %2F or %3B which are / and ; respectively? Once decoded those alter the structure of the path making it harder to match reliably. We could leave the request path encoded via UrlPathHelper#urlDecode…

Hi Spring fans! In this installment Josh Long (@starbuxman) talks to Wavefront co-founder and VMware Principal Engineer Clement Pang (@panghy).

Hi, Spring fans! What a week it's been! Tomorrow I'll be presenting a webinar on the easy integration between Spring Boot and Tanzu Wavefront. Wavefront is an all-in-one, integrated distributed tracing metrics analytics observability platform. Join us tomorrow to learn about observability, about Wavefront, and their integration in the Spring ecosystem with Spring Cloud Sleuth and Micrometer, among other things.

We've so many great things to look at this week so let's get to it!

• Spring Tools 4.7.0 released
• A Bootiful Podcast: Nisha Kumar and Rose Judge on the Linux Foundation's project Tern
• What's new in Spring Boot 2.3
• Getting Started With RSocket: Spring Security
• Spring Tips: Spring and Graal (pt. 2)
• Spring Boot for Apache Geode & VMware GemFire 1.1.8.RELEASE and 1.2.8.RELEASE available!
• Julien Dubois on an Azure Native Function with Spring Cloud Function
• VMworld 2020 Digital Edition
• I love this Spring Data JDBC example demonstrating an integration with JOOQ.
• Check out the rewritten getting started guide on using Spring Data JPA with Azure Database for MySQL
• A great post on Okta Developer: Angular, Docker with a Big Hug from Spring Boot …

Hi, Spring fans! In this installment Josh Long (@starbuxman) talks to Nisha Kumar and Rose Judge who work on the Linux Foundation's project Tern.

• Tern from the Linux Foundation
• Shift Left testing
• SPDX
• A Maven plugin supporting SPDX

Speaker: Phil Webb (@phillip_webb)

Timecodes

Use the timecodes below if you want to jump to a specific part of the presentation:

• 00:27 - Intro
• 01:59 - Creating the Demo
• 04:01 - Building Docker Images with the Spring Boot Plugin
• 09:21 - Building Docker Images with a Dockerfile
• 16:40 - Customizing Layers
• 21:38 - Graceful Shutdown
• 25:19 - Kubernetes Probes
• 30:55 - Configuration Properties End-to-End Traceability
• 33:00 - Wrap-up and Upgrade Gotchas

Links

The following links are referenced in the presentation:

• Building OCI Images [Maven|Gradle]
• Packaging Layered Jars [Maven|Gradle]
• Customizing Layers [Maven|Gradle]
• Writing a Dockerfile
• Release Notes
• Contributing Instructions
…

Reading time: about 6 minutes Coding time: about 20 minutes

If you've been following my series on RSocket, you've already learned how to build client-server applications with Spring Boot. In today's exercise, you're going to learn how to add security to your RSocket applications.

The task of securing RSocket applications is greatly simplified when you use Spring Security. Spring Security is a must-have module for any production application. It allows you to easily plugin many different authentication providers and restricts each user's access to your application based on their identity and…

speaker: Josh Long (@starbuxman)

Hi Spring fans! Welcome to a very special, interregnum episode of Spring Tips where we revisit Spring and GraalVM native images. I wanted to get this video out in light of the recent Spring Graal 0.7.1 release which drastically simplifies things even compared to the last time we looked at Spring and Graal waaay back in April 2020.

TL;DR: GraalVm is a JIT replacement that you can use with a stock-standard JVM, and that's worth looking into in its own right. GraalVM also offers a separate feature supporting native image compilation. This native-image builder takes bytecode and turns it into an architecture-specific binary that sheds the JVM and embeds something called SubstrateVM. Native images are fast to startup and they take way…