I ended up with a Processor that built a new Map on a header iterating over
the media and prefixing each in the header variant.
I may in-line this in the camel route (as per your example) to level the
knowledge a little better though.
Thanks for the suggestions.
On 20 January 2015 at 15:16, Jakub Korab <jakub.korab.li...@gmail.com>
wrote:
> 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/
> >>
>
>
