This article is part of a blog series that explores the newly redesigned Spring Cloud Stream applications based on Java Functions. In this episode, we are investigating the Aggregator function and its relationship with the Splitter function. We will see how we can customize the default behavior. We will also take a look at the importance of configuring a shared message store for the aggregator.

Here are all the previous parts of this blog series.

• Introducing Function Based Streaming Applications

• Function Composition with Streaming Applications

• How to Build a Supplier and Source Application

• How to Build a Consumer and Sink Application

• Build and Run a Simple Stream Application

• Case Study: HTTP Request Function and Processor

• Case Study: File Source and MongoDB Sink

• Case Study: Relational Database Source and File Sink

• Case Study: Remote File Ingest with Spring Cloud Data Flow

…

Hi, Spring fans! In this installment Josh Long (@starbuxman) talks to Optic (@UseOptic) CEO Aidan Cunniffe (@aidandcunniffe) about OpenAPI, contract testing, and so much more

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Hi Spring fans! Welcome to another installment of This Week in Spring! How're things? It's been unseasonably warm here in San Francisco so I am writing this from my balcony with a warm cup of coffee and hope in my heart. It is still very hard to believe we're near Halloween, though! Crazy how time flies. There's lots of good stuff to look at this week so let's get to it! Hopefully you can enjoy this week's news from some warm, safe and healthy spot in your life, too.

• A Bootiful Podcast: DataStax's Patrick McFadin on DataStax Astra, Cassandra, Cassandra data modeling patterns, and more
• A tutorial on Batch and REST
• History of Open Source and Free Software: Dirk & Swap: Conversations on Open Source
• Incubator support for Spring and GraphQL
• Premiering: Bootiful Kotlin
• Proposed schedule for JDK 16
• Spring Authorization Server 0.0.2 available now
• Spring Boot 2.4.0-M4 available now
• Spring Data 2020.0 RC2 out now
• Spring Integration 5.4 Release Candidate 1 Available
• Spring Security: Delegating authorization checks to bean methods
• …

Hi, Spring fans! In this talk Spring Developer Advocate, Java Champion, and Kotlin Google Developer Advocate Josh Long (@starbuxman) introduces the Kotlin ecosystem, the language, and its application when building server-side Spring applications.

This is a roving tour of all things Kotlin, and there's a lot to cover, including:

• building Android applications with Kotlin on mobile devices
• building native applications with Kotlin and Kotlin Native ((m)alloc, pointers, and POSIX APIs, oh, my!)
• giving existing APIs like the venerable JdbcTemplate a fresh coat of paint with Kotlin
• using Kotlin ecosystem libraries like the Exposed ORM with Spring
• using rich DSLs such as those provided for Spring Framework's programmatic bean registration, HTTP endpoints, and for Spring Cloud Gateway
• kicking up our reactive applications a notch with coroutines
…

Hi, Spring fans! In this episode Josh Long (@starbuxman) talks about all the wonderful shows he's been at, the epic new support for Kubernetes-ready native images in Spring Boot 2.3 and Spring Boot 2.4, and then he talks to DataStax's own Patrick McFadin (@PatrickMcFadin), a legend in the JVM and Cassandra communities, and an all around amiable gent.

Hi, Spring fans! Welcome to another installment of This Week in Spring! There's just so much to talk about this week and I scarcely know where to start so let's just get into it.

• A Bootiful Podcast: Reactor team engineer, fellow Java Champion, and conference organizer Audrey Neveu
• A look at the Sentry Spring Boot starter
• Apache Tomcat 10.0.0-M9 (alpha) is out
• Documenting Spring Boot Microservices with Optic
• Dr. B Talks About IoT and Edge Technology in Open Source and Why It’s Important
• Google Cloud now supports buildpacks | Google Cloud Blog
• JDK 15 Security Enhancements
• Last Call: VMworld Special Savings on Training & Certification
• Missed VMworld 2020?
• New candidate JEP: 395: Records
• Spring Cloud 2020.0.0-M4 (aka Ilford) Is Available
• …

Hi, Spring fans! In this episode Josh Long (@starbuxman) talks to Reactor team engineer, fellow Java Champion, and conference organizer Audrey Neveu (@Audrey_Neveu)

Hi, Spring fans! Welcome to another installment of This Week in Spring! It's been a fun week thus far - I spoke Monday at the first ever Garden State JUG event on testing Spring-based application and services and then today I spoke at the NYJava SIG about RSocket. Thank you so much for having me!

I can't believe it's already October 6th! We're closer to 2021 than 2019. Crazy. A quarter of a year to go. I just write these roundups and things seem to fly as a result.

We've got a lot to get to, so let's dive right in

• I wrote a preface for a Chinese-language book on reactive programming with Spring and you might enjoy the book, too
• A Bootiful Podcast: Long time Spring Framework engineer Arjen Poutsma on Spring's web support, Scala, API Design, Reactive programming and more
• Premiering: Cloud Native Java, Redux. I put together this quick, almost 50 minutes-long video, covering a ton of things: distributed locks, reactive service orchestration and…

The Spring on Azure team, in partnership with the Azure Cosmos DB team, are proud to have just made the Spring Data Azure Cosmos DB v3 generally available. This is the latest version of Azure Cosmos DB’s SQL API Spring Data connector.

Azure Cosmos is a highly-available globally-distributed multi-model database with competitive performance SLAs. With Spring Data Azure Cosmos DB, developers may use Spring Data natively on top of the Azure Cosmos DB SQL API to manipulate documents and issue custom or derived queries.

With the launch of the v3 connector, and its deep integration with Spring on…