Apache Camel：setProperty和Groovy

Question

I have the following Camel route:

<route id="myroute">
    <from uri="timer://runOnce?repeatCount=1&amp;delay=10" />

    <!-- Set a new property on the exchange. -->
    <to uri="bean:propSetter?method=setProp" />

    <to uri="direct:fizz" />
</route>

My PropSetter bean:

public class PropSetter {
    // Add new "buzz" ArrayList<Long> to the exchange.
    public void setProp(Exchange exchange) {
        exchange.setProperty("buzz", new ArrayList<Long>());
    }
}

I would like to rewrite this without a Java bean and instead use Camel's <setProperty/> element. The only thing I can think of is to use the built-in Groovy expression:

<route id="myroute">
    <from uri="timer://runOnce?repeatCount=1&amp;delay=10" />

    <!-- Set a new property on the exchange. -->
    <setProperty propertyName="buzz">
        <groovy>new ArrayList&lt;Long&gt;();</groovy>
    </setProperty>

    <to uri="direct:fizz" />
</route>

But this does not seem to work. So how can I use XML to set a new ArrayList<Long> on the exchange called buzz ?

Answer 1

Define a list using Spring's util namespace as :

<util:list id="myList" value-type="java.lang.String">
</util:list>

Then using the simple language you can access the bean and set in an exchange property

<camel:setProperty propertyName="buzz">
  <camel:simple>${bean:myList}</camel:simple>
</camel:setProperty>