Dear Spring community,

On behalf of the team and all the contributors, it’s my pleasure to announce a General Availability for Spring Integration 5.5, plus Spring Integration 5.4.7 patch release.

Both versions can be obtained from Maven Central and it is recommended to upgrade your projects or just pull them transitively from respective latest Spring Boot patch versions!

compile 'org.springframework.integration:spring-integration-core:5.5.0'

Spring Integration 5.4.7 version contains mostly critical bug fixes and here is a highlight of notable changes made to Spring Integration 5.5, which, in general, is based on the community feedback to make the framework useful for end-user use-cases:

• A support for Spring Native compatibility - a lot of bean definition reflection has been reworked to the functional style, which improves a start up time even for regular JVM application!

• The FileAggregator component was introduced. See its JavaDocs for more info;

• All the persistent MessageGroupStore implementations provide a streamMessagesForGroup(Object groupId) contract based on the target database streaming API;

• The integrationGlobalProperties custom bean now has to be an instance of org.springframework.integration.context.IntegrationProperties instead of deprecated java.util.Properties representation. All these Integration properties are now exposed as auto-configuration properties in Spring Boot;

• The maxMessagesPerPoll == 0 for an AbstractPollingEndpoint is treated now as to skip calling the source;

• A @Reactive sub-annotation was introduced for annotation configuration to apply a Function<? super Flux<Message<?>>, ? extends Publisher<Message<?>>> reactiveCustomizer for underlying consumer endpoint and make it as reactive independently of the input channel. Same behavior can be achieved in Java DSL via ConsumerEndpointSpec.reactive() option;

• MongoDb message sources now have an optional update to mark document which have just been pulled from the collection;

• WebSocket server endpoint-based channel adapters can now be registered (and removed) at runtime;

• The MessageGroup abstraction has now a condition property which can be consulted later on instead of the whole group iteration. The AbstractCorrelatingMessageHandler, in turn, exposes a BiFunction<Message<?>, String, String> conditionSupplier to extract possible group condition from the currently processed message;

• The DelayHandler now registers a TransactionSynchronization to schedule a delay task only when current transaction is committed;

• The GreenMail library is used now for email integration tests.

See What’s New in documentation for more information. Be sure to consult the Migration Guide since the upgrade may cause some breaking changes.

Stay tuned for Spring Boot 2.5.0 later today!

Cheers, 
Artem

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