Exchange Pattern

There are two Message Exchange Patterns you can use in messaging.

From there Enterprise Integration Patterns they are:

In Camel we have an org.apache.camel.ExchangePattern enumeration which can be configured on the exchangePattern property on the Message Exchange indicating if a message exchange is a one way Event Message (InOnly) or a Request Reply message exchange (InOut).

For example to override the default pattern on a JMS endpoint you could use the exchangePattern parameter in the Endpoint URI as shown: