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Chapter 15. EL
Overview 링크 복사링크가 클립보드에 복사되었습니다!
링크 복사링크가 클립보드에 복사되었습니다!
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 링크 복사링크가 클립보드에 복사되었습니다!
링크 복사링크가 클립보드에 복사되었습니다!
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 링크 복사링크가 클립보드에 복사되었습니다!
링크 복사링크가 클립보드에 복사되었습니다!
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 링크 복사링크가 클립보드에 복사되었습니다!
링크 복사링크가 클립보드에 복사되었습니다!
Table 15.1, “EL variables” lists the variables that are accessible when using EL.
Variable | Type | Value |
---|---|---|
exchange | org.apache.camel.Exchange | The current Exchange |
in | org.apache.camel.Message | The IN message |
out | org.apache.camel.Message | The OUT message |
Example 링크 복사링크가 클립보드에 복사되었습니다!
링크 복사링크가 클립보드에 복사되었습니다!
Example 15.2, “Routes using EL” shows two routes that use EL.
Example 15.2. Routes using EL