v4.2.0-RC1

⭐ New Features

• Remove noNullElements from RabbitAdmin #3731
• Simplify buildMessage logic #3730
• Fix the local antora task #3729
• Map received exchange and routing key from AMQP 1.0 annotations #3699
• Map non-string message and correlation ids in RabbitAmqpUtils #3694
• Simplify conditional logic #3693
• Map expiration to AMQP 1.0 header ttl #3692
• Map Date headers to AMQP 1.0 timestamp properties #3676
• Map priority and delivery mode in RabbitAmqpUtils #3668
• Add missing @Override annotation #3667
• Expose method for declaring multiple Declarable objects [AMQP-842] #2392

🐞 Bug Fixes

• Return null from RabbitAmqpAdmin.getQueueInfo for missing queue #3725
• Fix queue type handling in RabbitAmqpAdmin #3715
• Allow AMQP 1.0 listener container restart right after stop #3714
• Use URI constructor and test bad requests #3711
• Honor template defaults in RabbitAmqpTemplate.convertAndSend with MPP #3704

📔 Documentation

• Fix typos in documentation and assertions #3710

🔨 Dependency Upgrades

• Upgrade micrometer to 1.18.0-RC1 #3758
• Upgrade reactor to 2026.0.0-RC1 #3757
• Upgrade spring-data-bom to 2026.1.0-RC1 #3756
• Upgrade spring-framework to 7.1.0-RC1 #3755
• Bump com.github.spotbugs:spotbugs-annotations from 4.10.4 to 4.10.5 #3739
• Bump gradle-wrapper from 9.8.0 to 9.8.1 #3724
• Bump com.rabbitmq:stream-client from 1.11.0 to 1.12.0 #3723
• Bump org.apache.qpid:protonj2-client from 1.3.0 to 1.4.0 #3722
• Bump com.rabbitmq.client:amqp-client from 1.5.0 to 1.6.0 #3721
• Bump kotlinVersion from 2.4.20 to 2.4.21 #3720
• Bump ch.qos.logback:logback-classic from 1.6.4 to 1.6.5 #3709
• Bump com.rabbitmq:amqp-client from 5.36.0 to 5.37.0 #3708
• Bump gradle-wrapper from 9.7.1 to 9.8.0 #3691
• Bump ch.qos.logback:logback-classic from 1.6.3 to 1.6.4 #3690
• Bump com.fasterxml.jackson:jackson-bom from 2.22.2 to 2.22.3 #3687
• Bump tools.jackson:jackson-bom from 3.2.2 to 3.2.3 #3686
• Bump org.mockito:mockito-bom from 5.23.0 to 5.24.0 #3685

❤️ Contributors

Thank you to all the contributors who worked on this release:

@janwaleed09, @kdelay, @ngocnhan-tran1996, and @sharanggupta