The #convertAndSend and #receiveAndConvert methods and the
MessageConverter interface currently are not type safe. Everywhere
Object is passed around casts have to be made.
This pull request tries to address the issue by:
- split MessageConverter into two interfaces, MessageDecoder and
MessageEncoder so that Java 8 lambdas can be used
- add generics to MessageConverter, MessageDecoder and
MessageEncoder
- for every #convertAndSend method add a new one that has a
MessageEncoder as a second argument
- for every #receiveAndConvert method add a new one that
has a MessageDecoder as a second argument
- add generics to the new #convertAndSend and
#receiveAndConvert methods
MessageConverter and MessageDecoder are not be best names but the best ones I could come up with.
Maybe MessageConverter and MessageDecoder should be annotated with
java.lang.FunctionalInterface but this would have to be done over the
entire code base eg. org.springframework.jdbc.core.RowMapper.
As usual, I'm not one hundred percent certain when it comes to wild cards.
And tests are missing.
Issue: SPR-10412 https://jira.springsource.org/browse/SPR-10412
Comment From: snicoll
Thanks for the PR and sorry for the time it took to get back to you. We're not keen to add a bunch of overloaded methods like this to JmsTemplate itself. JmsTemplate is usually used internally with a more defined API where such rich type is exposed at that level.