[[Exchange-MessageExchange]]
=== Message Exchange

To support various message exchange patterns
like one way Event Message and
Request Reply messages Camel uses an
http://camel.apache.org/maven/current/camel-core/apidocs/org/apache/camel/Exchange.html[Exchange]
interface which has a *pattern* property which can be set to *InOnly*
for an Event Message which has a single inbound
Message, or *InOut* for a
Request Reply where there is an inbound and
outbound Message.

[[Exchange-SeeAlso]]
==== See Also

* Event Message
* Request Reply
* Exchange Pattern
* Message
