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Chapter 18. Header
Overview
The header language provides a convenient way of accessing header values in the current message. When you supply a header name, the header language performs a case-insensitive lookup and returns the corresponding header value.
The header language is part of camel-core
.
XML example
For example, to resequence incoming exchanges according to the value of a SequenceNumber
header (where the sequence number must be a positive integer), you can define a route as follows:
<camelContext xmlns="http://camel.apache.org/schema/spring"> <route> <from uri="SourceURL"/> <resequence> <language language="header">SequenceNumber</language> </resequence> <to uri="TargetURL"/> </route> </camelContext>
Java example
The same route can be defined in Java, as follows:
from("SourceURL") .resequence(header("SequenceNumber")) .to("TargetURL");