The Simple Language

Table of Contents

Basic syntax
OGNL expressions
Predicates

The simple language provides various elementary expressions that return different parts of a message exchange. For example, the expression, header.timeOfDay, would return the contents of a header called timeOfDay from the incoming message. You can also construct predicates by testing expressions for equality. For example, the predicate, ${header.timeOfDay} == '14:30', tests whether the timeOfDay header in the incoming message is equal to 14:30.