Hi Spring fans and welcome to another installment of This Week in Spring! This week I'm in Chicago, New York City and Denver talking to Pivotal customers. We've got a lot of good stuff to look at this week so let's get to it!

• Spring Data ninja Thomas Risberg just announced Spring for Apache Hadoop 2.5.0.RC1. The new release is primarily a bugfix. The post looks forward to Spring for Apache Hadoop 3.0, which will be based on Spring Boot, a Java 8 baseline, Spark 2.0 integration, and Spring Batch 4.0 readers and writers.
• Spring Data ninja Mark Paluch looks at a lot of the new features in Spring Data Kay including support for fluent MongoOperations, Kotlin,smarter MongoDB collation, Java 9 compatability, and so much more.
• I liked Arnold Galovics's post on how to configure a DataSource proxy in Spring Boot.
• Kotlin's hidden costs - Benchmarks - Renato Athaydes…

New release candidate for Spring for Apache Hadoop 2.5

We are pleased to announce the Spring for Apache Hadoop 2.5 release candidate release.

The 2.5 version is primarily a bug fix and version upgrade release.

See the release changelog for details.

We continue to provide version specific artifacts with their respective transitive dependencies in the Spring IO milestone repository:

• 2.5.0.RC1 (default - Apache Hadoop stable 2.7.3)
• 2.5.0.RC1-cdh5 (Cloudera CDH 5.10)
• 2.5.0.RC1-hdp26 (Hortonworks HDP 2.6)

Spring for Apache Hadoop Future

The Hadoop ecosystem is shifting and we think it is time to…

As we’ve just shipped the fourth milestone release of Spring Data release train Kay, let’s take a look at the changes and features that come with the 13 modules on the train since our first milestone. This blog post covers a set of changes but is no means comprehensive of the 550+ changes between M2 and M4. To get a full list of changes, take a look into our Jira for Kay M1, M2, M3, and M4 changes.

Here’s a curated list of our key changes:

• Adjustments in the reactive support

• Composable repositories

• Improved naming scheme for CRUD methods

• Fluent MongoOperations API

• Kotlin extension for MongoDB’s Template API

• MongoDB Collation Support

• Redis client configuration

• Cassandra Lightweight transaction support and Query/Update objects

• Java 9 compatibility

• Upgrade to Elasticsearch 5.4

…

Hi Spring fans and welcome to another installment of This Week in Spring! This week I'm in Krakow, Poland for the epic Devoxx PL event and then it's off to Luxembourg for the VoxxedDays Luxembourg event! If you're around, don't hesitate to say hi

• Spring Framework lead Juergen Hoeller just announced Spring Framework 5.0 RC2. The new release is a major revision of RC1, refactoring the reactive support and path pattern parsing. It introduces JSR 305 based @Nullable / @NonNullApi Spring annotations into the codebase.
• Spring Data Release Train Kay M4 Released - Spring Data ninja Mark Paluch just announced Spring Data Train Kay M4, packed with new features and updates. Get the bits now!
• Spring IO Platform Athens-SR6 - Spring IO Platform lead Andy Wilkinson has just announced Spring IO Platform Athens-SR6, available from repo.spring.io and Maven Central. The new maintenance release includes Spring Boot 1.4.7, Spring Framework 4.3.9, Sspring Integration 4.3.10, Spring REST…

On behalf of the Spring Integration team I am pleased to announce that the fifth milestone for the Spring Integration 5.0 release (5.0.0.M5) is now available.

21 JIRAs (and some GitHub issues) made into this release, including bug fixes and a number of new features. Some highlights of features in M4 and M5, since the previously announced Milestone 3:

• The Splitter now can deal with the Java Stream and Reactor Flux payloads. If the output channel is a ReactiveStreamsSubscribableChannel, splitting supports back-pressure.

• A ErrorMessagePublisher together with the ErrorMessageStrategy have been introduced to pursue better error handling experience with the inception message for the ErrorMessage. The MessageListenerContainer in Spring Kafka 2.0 and Spring AMQP 2.0 are supplied with their own ErrorMessageStrategy to represent the original data in the ErrorMessage for the error handling flow.

• The new MockMessageHandler has been added to Spring Integration Test framework for replacing real `MessageHandler`s for unit testing:

  MessageHandler mockMessageHandler = mockMessageHandler() .handleNextAndReply(m -> m.getPayload().toString().toUpperCase());

  this.mockIntegrationContext .substituteMessageHandlerFor("myServiceActivator", mockMessageHandler);

  this.pojoServiceChannel.send(new GenericMessage<>("foo")); receive = this.results.receive(10000);

  assertEquals("FOO", receive.getPayload());

  …

On behalf of the community, I’m pleased to announce the release of Spring Security 5.0.0 M2. This release includes bug fixes, new features, and is based off of Spring Framework 5.0.0 RC2.

A complete example of using Spring Security to secure a Spring WebFlux application can be found in the Spring Security samples at hellowebflux and hellowebfluxfn.

The highlights of the release include:

• Simplified Reactive Security Configuration

• WebTestClient Support

Simplified Reactive Security Configuration

It is now very easy to setup a minimal Reactive Security Configuration. Add @EnableWebFluxSecurity and provide a …

On behalf of the community I’m pleased to announce the release of Spring Session 2.0.0.M2. This release is focused primarily on ensuring compatibility with Spring Framework 5.0.0.RC2 and Spring Data Kay-M4 which is the minimum Spring version required.

We expect that Spring Session 2.0.0.M3 will have a new Java 8 friendly API along with Support for Spring WebFlux.

Supported Data Stores

As an update to our new story for supported repositories, we now have sub projects for Spring Session Geode (GemFire) and Spring Session MongoDB. You can find the Spring Session MongoDB release announcement here.

Shortly after Spring Framework 5.0 RC2, a second milestone of Spring Boot 2 is now available from our milestone repository. This release closes over 90 issues and pull requests, thanks to all that contributed!

For a complete list of changes, and upgrade instructions, see the Spring Boot 2.0.0.M2 Release Notes on the WIKI and the updated reference documentation.

If you want to get started and discover those new feature, you can easily bootstrap a new project on https://start.spring.io

Project Page | GitHub | Issues | Documentation | Stack Overflow | Gitter

Dear Spring Community,

Last month, Spring Session lead Rob Winch announced the release of Spring Session 2.0.0.M1 (notice the lack of MongoDB there?) In that post, he pared back Spring Session to officially supporting Redis, JDBC, and Hazelcast. No more MongoDB.

I’m here to announce that I’ve pick up the torch for Spring Session MongoDB. Managing both Spring Session and Spring Security (among other responsibilities), Rob couldn’t maintain high caliber support with too many data stores. Being a member of the Spring Data team, I felt better suited toward providing MongoDB support of Spring Session, so I reinstated it as a separate project…