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Chapter 15. Groovy
Overview Copier lienLien copié sur presse-papiers!
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Groovy is a Java-based scripting language that allows quick parsing of object. The Groovy support is part of the
camel-script
module.
Adding the script module Copier lienLien copié sur presse-papiers!
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To use Groovy in your routes you need to add a dependency on
camel-script
to your project as shown in Example 15.1, “Adding the camel-script dependency”.
Example 15.1. Adding the camel-script dependency
Static import Copier lienLien copié sur presse-papiers!
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To use the
groovy()
static method in your application code, include the following import statement in your Java source files:
import static org.apache.camel.builder.camel.script.ScriptBuilder.*;
import static org.apache.camel.builder.camel.script.ScriptBuilder.*;
Built-in attributes Copier lienLien copié sur presse-papiers!
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Table 15.1, “Groovy attributes” lists the built-in attributes that are accessible when using Groovy.
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 | Function with a resolve method to make it easier to use the properties component inside scripts. |
The attributes all set at
ENGINE_SCOPE
.
Example Copier lienLien copié sur presse-papiers!
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Example 15.2, “Routes using Groovy” shows two routes that use Groovy scripts.
Example 15.2. Routes using Groovy
Using the properties component Copier lienLien copié sur presse-papiers!
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To access a property value from the properties component, invoke the
resolve
method on the built-in properties
attribute, as follows:
.setHeader("myHeader").groovy("properties.resolve(PropKey)")
.setHeader("myHeader").groovy("properties.resolve(PropKey)")
Where PropKey is the key of the property you want to resolve, where the key value is of
String
type.