Groovy is a Java-based scripting language that allows quick parsing of
object. The Groovy support is part of the camel-script
module.
To use Groovy in your routes you need to add a dependency on
camel-script
to your project as shown in
Example 4, “Adding the camel-script dependency”.
Example 4. Adding the camel-script dependency
<!-- Maven POM File --> <properties> <camel-version>2.11.0-fuse-00-xx</camel-version> ... </properties> <dependencies> ... <dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-script</artifactId> <version>${camel-version}</version> </dependency> ... </dependencies>
Table 3, “Groovy attributes” lists the built-in attributes that are accessible when using Groovy.
Table 3. Groovy attributes
Attribute | Type | Value |
---|---|---|
context | org.apache.camel.CamelContext | The Camel Context |
exchange | org.apache.camel.Exchange | The current Exchange |
request | org.apache.camel.Message | The IN message |
response | org.apache.camel.Message | The OUT message |
The attributes all set at ENGINE_SCOPE
.
Example 5, “Routes using Groovy” shows two routes that use Groovy scripts.
Example 5. Routes using Groovy
<camelContext> <route> <from uri=""mock:mock0" /> <filter> <language language="groovy">request.lineItems.any { i -> i.value > 100 }</language> <to uri="mock:mock1" /> </filter> </route> <route> <from uri="direct:in"/> <setHeader headerName="firstName"> <expression language="groovy">$user.firstName $user.lastName</expression> </setHeader> <to uri="seda:users"/> </route> </camelContext>