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Spring Cloud Stream Elmhurst.RC1/2.0.0.RC1 发布

Spring Cloud Stream Elmhurst 的候选版 Elmhurst.RC1/2.0.0.RC1 已发布，Spring Cloud Stream Elmhurst 2.0.0.RC1 可在 Spring Milestone 仓库获取到。

发布说明包含了与 Spring Boot, Spring Cloud, Spring AMQP, 以及 Spring for Apache Kafka 版本兼容性的相关信息。

下面简要介绍本次发布的版本包含的特性和改进：

Polling Source as an alternative to the event-driven message consumption.
Custom MessageConverters via @StreamMessageConverter annotation.
New Test Binder - a binder backed by Spring Integration to support testing at the level of binder destinations rather then its internal channels.
Actuator endpoints for binding control - allows one to not only see the existing bindings but to manage their lifecycle (i.e., stop/start etc)
Micrometer, micrometer, micrometer! - Metrics support is now based on Micrometer
Complete revamping of Kafka Streams binder - details to follow.

Improved and consistent Content-Type negotiation
StreamListener Infrastructure enhancements to deal with multiple destinations
Configurable RetryTemplate
Configurable Web environment - optional by default yet giving user a choice to bring reactive (Netty) or conventional (Tomcat) based on the provided boot starter.
Partitioning is now Spring configured - providing for more user flexibility when customizations around partitioning is required.
Actuator is becoming optional -
Initializer (start.spring.io) improvements - improved user experience when creating new Spring Cloud Stream applications.