One way to do this is to assemble the list of destinations in a header,
then reference that. Here's a rough example:
.process( new Processor() {
public void process(Exchange exchange) {
Message in = exchange.getIn();
List<String> mediaList = ((YourPojo) in.getBody()).getMedia();
String destinations = "";
int i = 0;
for (String media : mediaList) {
if (i++ > 0) {
destinations += ",";
}
destinations += "direct:" + media;
}
in.setHeader("mediaDestinations", destinations);
}
})
.recipientList(header("mediaDestinations"))
This has a nice side-effect of making it really easy to debug by
dropping a log statement before the recipientList.
You could also use bean binding instead of a processor:
.setHeader(method(new MyRouter(), "route(${body.media})"))
with a class like:
public class MyRouter {
public String route(List<String> media) {...} // returns
comma-seperated endpoints
}
Jakub
On 19/01/15 18:01, James Green wrote:
> You mean a class implementing Expression?
>
> On 19 January 2015 at 17:56, Claus Ibsen <claus.ib...@gmail.com> wrote:
>
>> You can use a method call expression (aka java bean) where you add the
>> direct: prefix to the media headers.
>>
>> Or try look at groovy or something which may be able to prefix to a
>> list. I think I have seen that done in fabric8 v1.
>>
>>
>> On Mon, Jan 19, 2015 at 6:32 PM, James Green <james.mk.gr...@gmail.com>
>> wrote:
>>> .recipientList(simple("direct:${body.media}"))
>>>
>>> So media is a List<String> property where each entry has a media value:
>>> "sms", "email", etc.
>>>
>>> What I get out of this is an exception (where "sms" is the only media):
>>>
>>> org.apache.camel.component.direct.DirectConsumerNotAvailableException: No
>>> consumers available on endpoint: Endpoint[direct://%5Bsms%5D].
>>>
>>> If I remove the direct: from the simple expression and place it directly
>> in
>>> the media property value it works fine. But then my POJO "knows" about
>>> direct: prefixes. Not what I had hoped.
>>>
>>> Any ideas? I can't use transform() as the rest of the message needs to be
>>> passed onwards.
>>>
>>> James
>>
>>
>> --
>> Claus Ibsen
>> -----------------
>> Red Hat, Inc.
>> Email: cib...@redhat.com
>> Twitter: davsclaus
>> Blog: http://davsclaus.com
>> Author of Camel in Action: http://www.manning.com/ibsen
>> hawtio: http://hawt.io/
>> fabric8: http://fabric8.io/
>>
