Automated correlation ID generation (system UID)

If you do not specify a callback handler and set type="callback" (or entirely omit the type attribute), then the id will be generated automatically as system UID, and the value will be the same for request and response:

Enabling via feature:

<jaxrs:features>
    <bean class="org.talend.esb.policy.correlation.feature.CorrelationIDFeature"/>
</jaxrs:features>