Oleg Zhurakousky

We are pleased to announce the second Milestone of the Spring Cloud Function - 2.0.0.M2.

Individual modules of Spring Cloud Function 2.0.0.M2 are available for use in the Spring Milestone repository.

Aside form general enhancements and bug fixes, the primary themes for this release are

• Kotlin support
• new programming model for Azure Functions (blog to follow)
• automatic (optional) export of Supplier on startup in web adapter

How can you help?

If you’re interested in helping out, check out the “ideal for contribution” tag in the issue repository. If you have general questions, please ask on stackoverflow.com using the spring-cloud-function tag.

Rarely we blog about a single feature, but given that this one was one of the most requested ones in Spring Cloud Function (relatively young project), we thought it may be appropriate, so here it is.

Initial support for Kotlin lambdas has been added to Spring Cloud Function. What it means is that Spring Cloud Function can now recognize Kotlin lambdas that effectively match to one of Java’s Supplier, Function or Consumer and treat them as such.

That is:

@Bean
open fun kotlinFunction(): (String) -> String {
    return  { it.toUpperCase() }
}

@Bean
open fun kotlinConsumer(): (String) -> Unit {
    return  { println(it) }
}

@Bean
open fun kotlinSupplier(): () -> String {
    return  { "Hello Kotlin" }
}

We are pleased to announce the second Milestone of the Spring Cloud Stream Fishtown release train - Fishtown.M2/2.1.0.M2.

Spring Cloud Stream Fishtown 2.1.0.M2 is available for use in the Spring Milestone repository. The release notes include relevant information about version compatibility with Spring Boot, Spring Cloud, Spring AMQP, and Spring for Apache Kafka.

The following section provides a brief summary of features and improvements included in this release.

Notable Dependency Upgrades

• Spring Boot 2.1.0.M2 (now fully compatible with Spring Initializr)
• Reactor Californium M2

We are pleased to announce the first Milestone of the Spring Cloud Stream Fishtown release train - Fishtown.M1/2.1.0.M1.

Spring Cloud Stream Fishtown 2.1.0.M1 is available for use in the Spring Milestone repository. The release notes include relevant information about version compatibility with Spring Boot, Spring Cloud, Spring AMQP, and Spring for Apache Kafka.

The following section provides a brief summary of features and improvements included in this release.

Notable Features, Improvements & enhancements

After a long and exciting journey, we are pleased to announce the General Availability release of the Spring Cloud Stream Elmhurst release train - Elmhurst.RELEASE/2.0.0.RELEASE.

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-stream-dependencies</artifactId>
            <version>Elmhurst.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

This is the first blog in a series of pre-release blogs in preparation for Spring Cloud Stream 2.0.0.RELEASE.

Preface

Spring Cloud Stream 2.0 includes a complete revamp of content-type negotiation for the channel-based binders to address performance, flexibility and most importantly consistency. The following blog touches on some of the key points around what has been done, what to expect and how it may help you.

Introduction

Data transformation is one of the core features of any message-driven microservice architecture. In Spring Cloud Stream, such data is represented as a Spring Message.

After a long and exciting journey we are pleased to announce the first Release Candidate of the Spring Cloud Stream Elmhurst release train - Elmhurst.RC1/2.0.0.RC1.

Spring Cloud Stream Elmhurst 2.0.0.RC1 is available for use in the Spring Milestone repository. The release notes include relevant information about version compatibility with Spring Boot, Spring Cloud, Spring AMQP, and Spring for Apache Kafka.

Given that this is a Release Candidate the following section provides a brief summary of features and improvements not just included in this release but for 2.0 in general, with details to follow in a form of upcoming blogs and documentation updates in preparation for 2.0.0.RELEASE.

We are pleased to announce the 2.0.0.M4 release of the Spring Cloud Stream Elmhurst release train.

Spring Cloud Stream Elmhurst 2.0.0.M4 is available for use in the Spring Milestone repository. The release notes include relevant information about version compatibility with Spring Boot, Spring Cloud, Spring AMQP, and Spring for Apache Kafka.

The following sections list the summary of features and improvements included in this release:

• Continuing performance improvements around Content-type resolution
• Introduction of Polling Source as an alternative to the event-driven message consumption
• StreamListener Infrastructure enhancements to primarily deal with multiple destination (details to follow)
• Continuing Documentation improvements
• Various other enhancements and bug fixes

We are pleased to announce the 2.0.0.M3 release of the Spring Cloud Stream Elmhurst release train.

Spring Cloud Stream Elmhurst 2.0.0.M3 is available for use in the Spring Milestone repository. The release notes include relevant information about version compatibility with Spring Boot, Spring Cloud, Spring AMQP, and Spring for Apache Kafka.

The following sections list new features and improvements included in this release:

Improved Content Type Resolution

The content-type resolution has been improved and consolidated in the channel interceptors, which makes it configurable for situations that require application-level customizations. Also, based on the community feedback, we now set the default content-type as application/json. However, it is still possible to override it via BindingProperties or it can be passed with the Message coming from an upstream application.