JIRA: https://jira.spring.io/browse/INT-4131
Specify an expression on the outbound endpoints to set the `x-delay` header when
using the RabbitMQ Delayed Message Exchange plugin.
Polishing
- PR Comments
- Add `setDelay`
- Port `FunctionExpression` from DSL
- Add `SupplierExpression`
Javadoc Fixes
Use ValueExpression for delay
* Simple polishing for `SupplierExpression`
* Mention plain `delay` property in the `amqp.adoc`
Conflicts:
spring-integration-amqp/src/test/java/org/springframework/integration/amqp/outbound/OutboundEndpointTests.java
Resolved.
Backport Polishing
Java 6 cpmpatibility; deprecation warnings.
5b41dc1513