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Attribute

Type

Value

context

org.apache.camel.CamelContext

The Camel Context

exchange

org.apache.camel.Exchange

The current Exchange

request

org.apache.camel.Message

The IN message

response

org.apache.camel.Message

The OUT message

properties

org.apache.camel.builder.script.PropertiesFunction

Camel 2.9: Function with a resolve method to make it easier to use Camels Properties component from scripts. See further below for example.

Attributes

You can add your own attributes with the attribute(name, value) DSL method, such as:

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Wiki Markup
{snippet:id=e1|lang=java|url=camel/trunk/components/camel-script/src/test/java/org/apache/camel/builder/script/JavaScriptExpressionTest.java}

Using properties function

Available as of Camel 2.9

If you need to use the Properties component from a script to lookup property placeholders, then its a bit cumbersome to do so.
For example to set a header name myHeader with a value from a property placeholder, which key is provided in a header named "foo".

Code Block

.setHeader("myHeader").groovy("context.resolvePropertyPlaceholders('{{' + request.headers.get('foo') + '}}')")

From Camel 2.9 onwards you can now use the properties function and the same example is simpler:

Code Block

.setHeader("myHeader").groovy("properties.resolve(request.headers.get('foo'))")

Dependencies

To use scripting languages in your camel routes you need to add the a dependency on camel-script which integrates the JSR-223 scripting engine.

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