On behalf of the team and everyone who contributed, I am pleased to announce the third Milestone for Spring Integration 6.4.0 generation.

In addition the regular bug fixes and dependency upgrades were release as Spring Integration 6.3.4 and 6.2.9.

Here are some notable improvements and new features in Spring Integration 6.4:

• First class support for IndexAccessor from SpEL and JsonIndexAccessor implementation (shout out to Sam Brannen for contribution);
• Performance and memory improvements for dynamic integration flow registrations;
• Control Bus Management via ControlBusCommandRegistry and deprecation for SpEL-based (and Groovy) Control Bus components;
• The ControlBusController at /control-bus to expose an endpoint for Control Bus Management via REST API;
• Fix JdbcMetadataStore for PostgreSQL and MySQL (and cover with respective tests);
• Introduce an MqttMessageNotDeliveredEvent to be emitted from the MqttActionListener.onFailure() callback.

See What's New in 6.4 for more details.

Also a Migration Guide contains some breaking changes in this new version.

We are looking for any feedback on 6.4 generation to further improve the Framework and your experience in upcoming release candidate in October.

Cheers, 
Artem

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