OGNL
Camel allows OGNL to be used as an Expression or Predicate the DSL or Xml Configuration.
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You can use OGNL dot notation to invoke operations. If you for instance have a body that contains a POJO that has a getFamiliyName
getFamilyName
method then you can construct the syntax as follows:
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"request.body.familyName"
// or
"getRequest().getBody().getFamilyName()"
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For example you could use OGNL inside a Message Filter in XML
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<route>
<from uri="seda:foo"/>
<filter>
<ognl>request.headers.foo == 'bar'</ognl>
<to uri="seda:bar"/>
</filter>
</route>
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And the sample using Java DSL:
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from("seda:foo").filter().ognl("request.headers.foo == 'bar'").to("seda:bar");
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You can externalize the script and have Camel load it from a resource such as "classpath:"
, "file:"
, or "http:"
.
This is done using the following syntax: "resource:scheme:location"
, eg to refer to a file on the classpath you can do:
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.setHeader("myHeader").ognl("resource:classpath:myognl.txt")
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If you use maven you could just add the following to your pom.xml, substituting the version number for the latest & greatest release (see the download page for the latest versions).
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<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-ognl</artifactId>
<version>x.x.x</version>
</dependency>
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