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Chapter 15. EL
Overview
The Unified Expression Language (EL) was originally specified as part of the JSP 2.1 standard (JSR-245), but it is now available as a standalone language. Apache Camel integrates with JUEL (http://juel.sourceforge.net/), which is an open source implementation of the EL language.
Adding JUEL package
				To use EL in your routes you need to add a dependency on camel-juel to your project as shown in Example 15.1, “Adding the camel-juel dependency”.
			
Example 15.1. Adding the camel-juel dependency
Static import
				To use the el() static method in your application code, include the following import statement in your Java source files:
			
import static org.apache.camel.language.juel.JuelExpression.el;
import static org.apache.camel.language.juel.JuelExpression.el;Variables
Table 15.1, “EL variables” lists the variables that are accessible when using EL.
| Variable | Type | Value | 
|---|---|---|
| 
								 | 
								 | The current Exchange | 
| 
								 | 
								 | The IN message | 
| 
								 | 
								 | The OUT message | 
Example
Example 15.2, “Routes using EL” shows two routes that use EL.
Example 15.2. Routes using EL