Hi, Spring fans! Welcome to another installment of This Week in Spring! How're you? What're you building these days? I'm sitting here enjoying a cup of coffee and a mooncake. I had a customer call at 6 am this morning. It was a ton of fun, but the entire time I was thinking about those delicious mooncakes. Mooncakes, you see, are a kind of cake commonly eaten by the Chinese diaspora worldwide for the Mid-Autumn Festival. I queued up at Golden Gate Bakery here in San Francisco for three hours yesterday in the overcast and slightly rainy weather for these much-beloved mooncakes. San Francisco is 35-40% Asian, and 20% Chinese, so we're a part of that amazing diaspora. Fall is well and truly upon us! But it is also delicious. And to those who celebrate, happy Mid-Autumn Festival!

If you're sitting there sipping on a warm cup of coffee and gnashing on a mooncake, then we've got just the weekly roundup for you! Let's dive right in!

• I'm writing a book on Spring Security! It's free! And open-source! Get the bits here And it's not finished but it's coming right along!
• Have you heard about "Jev"? Of course you have! It's a new kind of model that's extraordinarily fast at decisions, making it ideal for the outer routing loop of your agentic harness. Spring AI lead Christian Tsolov has a great post for more
• Last week I really enjoyed my conversation with Spring Tools lead Martin Lippert
• Spring Tools 5.4.0 released
• Conversational memory helps an AI remember what you’ve talked about. But the longer the conversation runs, the more context it has to carry around. What if it could remember the important stuff without remembering every word? Craig Walls looks at this in yet another installment of his Spring AI recipes series
• Java architect Ron Pressler has an amazing talk looking at memory management principles in Java
• An oldie but a goodie: I look at how to [use Spring Batch's new MongoDB-backed repository support](MongoDB-backed Spring Batch Job Repositories (new in Spring Boot 4.1)

)

• Baeldung has a nice post on the EnvironmentPostProcessor in Spring Boot
• They also have a nice post on registering with Spring Security
• Speaking of Spring Security, you might appreciate the code for this talk Spring Security lead Rob Winch and I did in Kansas City a few weeks ago for the KCDC conference, looking at different ways to secure various workloads with Spring