Apache Camel: OGNL

OGNL

Camel allows OGNL to be used as an Expression or Predicate the DSL or Xml Configuration.

You could use OGNL to create an Predicate in a Message Filter or as an Expression for a Recipient List

You can use OGNL dot notation to invoke operations. If you for instance have a body that contains a POJO that has a getFamiliyName method then you can construct the syntax as follows:

"request.body.familyName"
   // or 
"getRequest().getBody().getFamilyName()"

Variables

Variable	Type	Description
this	Exchange	the Exchange is the root object
exchange	Exchange	the Exchange object
exception	Throwable	the Exchange exception (if any)
exchangeId	String	the exchange id
fault	Message	the Fault message (if any)
request	Message	the exchange.in message
response	Message	the exchange.out message (if any)
properties	Map	the exchange properties
property(name)	Object	the property by the given name
property(name, type)	Type	the property by the given name as the given type

Samples

For example you could use OGNL inside a Message Filter in XML

<route>
  <from uri="seda:foo"/>
  <filter>
    <ognl>request.headers.foo = 'bar'</ognl>
    <to uri="seda:bar"/>
  </filter>
</route>

And the sample using Java DSL:

from("seda:foo").filter().ognl("request.headers.foo = 'bar'").to("seda:bar");

Dependencies

To use OGNL in your camel routes you need to add the a dependency on camel-ognl which implements the OGNL language.

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).

<dependency>
  <groupId>org.apache.camel</groupId>
  <artifactId>camel-ognl</artifactId>
  <version>1.4.0</version>
</dependency>

OGNL

Variables

Samples

Dependencies

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