In the XML DSL, you can use a simple expression by putting inside a
simple element. For example, to define a route that performs
filtering based on the contents of the foo header:
<route id="simpleExample">
<from uri="seda:orders"/>
<filter>
<simple>in.header.foo</simple>
<to uri="mock:fooOrders"/>
</filter>
</route>If you are embedding a simple expression inside a plain text string, you must use
the placeholder syntax, ${. For
example, to embed the Expression}in.header.name expression in a string:
<simple>Hello ${in.header.name}, how are you?</simple>Sometimes—for example, if you have enabled Spring property placeholders or
OSGi blueprint property placeholders—you might find that the
${ syntax clashes with
another property placeholder syntax. In this case, you can disambiguate the
placeholder using the alternative syntax,
Expression}$simple{, for the simple
expression. For example:Expression}
<simple>Hello $simple{in.header.name}, how are you?</simple> |  |  |
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