Groovy
Camel supports Groovy among other Scripting Languages to allow an Expression or Predicate to be used in the DSL or Xml Configuration.
To use a Groovy expression use the following Java code
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... groovy("someGroovyExpression") ...
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For example you could use the groovy function to create an Predicate in a Message Filter or as an Expression for a Recipient List
Customizing Groovy Shell
Sometimes you may need to use custom GroovyShell instance in your Groovy expressions. To provide custom GroovyShell, add implementation of the org.apache.camel.language.groovy.GroovyShellFactory SPI interface to your Camel registry. For example after adding the following bean to your Spring context...
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public class CustomGroovyShellFactory implements GroovyShellFactory {
public GroovyShell createGroovyShell(Exchange exchange) {
ImportCustomizer importCustomizer = new ImportCustomizer();
importCustomizer.addStaticStars("com.example.Utils");
CompilerConfiguration configuration = new CompilerConfiguration();
configuration.addCompilationCustomizers(importCustomizer);
return new GroovyShell(configuration);
}
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...Camel will use your custom GroovyShell instance (containing your custom static imports), instead of the default one.
Example
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// lets route if a line item is over $100
from("queue:foo").filter(groovy("request.lineItems.any { i -> i.value > 100 }")).to("queue:bar")
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And the Spring DSL:
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<route>
<from uri="queue:foo"/>
<filter>
<groovy>request.lineItems.any { i -> i.value > 100 }</groovy>
<to uri="queue:bar"/>
</filter>
</route>
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| Scripting Languages Context |
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| Scripting Languages Context |
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