On Fri, May 17, 2013 at 1:03 PM, Peter Hilton <pedro+ca...@lunatech.com> wrote: > On 17 May 2013, at 09:33, Claus Ibsen <claus.ib...@gmail.com> wrote: >> You can use the move option on the Camel file consumer, and then use a >> bean to calculate the file name. http://camel.apache.org/file2 > > Claus, by the way, your comment let to an 'aha' moment - the kind that > Manning talk about :) > > Being new to Camel, I hadn't realised the implications of the documentation > for File Component’s 'move' property (the implication being that I can write > my own code to calculate the file name): > >> move: Expression (such as File Language) used to dynamically set the >> filename when moving it after processing. > > Note that a later sentence on the same page seems to contract that I can use > this to calculate the file name: > >> The move and preMove options should be a directory name, which can be either >> relative or absolute. >
Ah yeah let me update the docs to make this more clear. Thanks for spotting this. > > Anyway, your suggestion to use a bean prompted me to drill down (→ > http://camel.apache.org/expression → http://camel.apache.org/bean-language) > and realise that I can always implement an expression or predicate as a > method in my own bean class. > Yes any expression / predicate can just be a method on a bean. For the predicate the returned value is evaluated as a boolean or a non empty value will be considered true. > For what it’s worth, I don’t yet see how I would discover that my bean must > have a 'calculateFileName' method - whether Camel will pick this method > because it's the only one, or whether it has to have that name, for example. > I’ll save that for another day. > Yeah if there is only one method then that's picked up. You can also tell Camel the name of the method to use move=bean:myBean.myMethod The bean selection logic is covered in CiA book chapter 4, or you can find some details on the camel bean wiki pages, somewhere. > Thanks again, > Peter > -- Claus Ibsen ----------------- www.camelone.org: The open source integration conference. Red Hat, Inc. FuseSource is now part of Red Hat Email: cib...@redhat.com Web: http://fusesource.com Twitter: davsclaus Blog: http://davsclaus.com Author of Camel in Action: http://www.manning.com/ibsen
