* GH-3763: Add `handleReactive()` for Java DSL Fixes https://github.com/spring-projects/spring-integration/issues/3763 Add a convenient terminal operator to `BaseIntegrationFlowDefinition` based on a `ReactiveMessageHandler`. Also add an overload like `handleReactive(ReactiveMessageHandlerSpec)` to let end-user to choose a protocol-specific channel adapter * * Fix `Namespace Factory` wording in the `BaseIntegrationFlowDefinition` Javadocs * Fix language in Docs Co-authored-by: Gary Russell <grussell@vmware.com> --------- Co-authored-by: Gary Russell <grussell@vmware.com>