Groovy Renderer User Guide
This page presents how to editing the route definition in groovy language through the Web Console and which DSLs are supported currently.
Getting Started
Through Web Console, you can review every route in the CamelContext. After opening a route in your browser, the URL may be http://localhost:8080/routes/route1, you can choose the edit link with groovy language to update it. A Groovy Renderer will turn the route into groovy route definition. For example, after chooseing to edit a route defined by the following XML:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<route id="route1" xmlns:ns2="http://camel.apache.org/schema/web" xmlns="http://camel.apache.org/schema/spring">
<description>This is an example route which you can start, stop and modify</description>
<from uri="seda:foo"/>
<to uri="mock:results" id="to1"/>
</route>
The GroovyRenderer will translate it into a route definition as follows:
import org.apache.camel.language.groovy.GroovyRouteBuilder;
class GroovyRoute extends GroovyRouteBuilder {
void configure() {
from("seda:foo").to("mock:results")
}
}
Then we can update the route by input new DSL into the configure method. For example, we can change it into a Content Based Router by updating it as follows.
class GroovyRoute extends GroovyRouteBuilder {
void configure() {
from("seda:a").choice().when(header("foo").isEqualTo("bar")).to("seda:b")
.when(header("foo").isEqualTo("cheese")).to("seda:c").otherwise().to("seda:d")
}
}
Save it and the route will deliver the following messages by parsing its header.
Guide for more DSLs
Though all kinds of DSLs can be accepted to create routes, but groovy renderer can't render every details of the routes when opening them. Web Console focuses on providing a editor for developers to update a route at runtime, but won't try to provide a development environment with full support of DSL. Following is a list showing which DSLs are fully supported and which can't be.