What is the difference between a channel adapter and a messaging gateway pattern?

Question

No matter how much I read about those two patterns I just can\'t see the difference.

Answer 1

From Spring integration reference docs:

Whereas the JMS Channel Adapters are intended for unidirectional Messaging (send-only or receive-only), Spring Integration also provides inbound and outbound JMS Gateways for request/reply operations.

See http://static.springsource.org/spring-integration/reference/htmlsingle/#jms