The setHeader method does not accept as parameters (string, string) or
(string, object) but (string, expression)
The method setHeader(String, Expression) in the type
ProcessorType<ProcessorType> is not applicable for the arguments (String,
String)
What is purpose of "expression" when we want to place something in the
header ?
Regards,
Charles
James.Strachan wrote:
>
> On 18/03/2008, cmoulliard <[EMAIL PROTECTED]> wrote:
>>
>> Hi,
>>
>> I would like to know if this is possible to enrich the message(s) (by
>> adding
>> a property or a header) created during a transformation step.
>>
>> ex :
>> from("file:///c:/temp/test?noop=true")
>> .unmarshal().csv()
>> .to("test-jms:queue:test.queue");
>>
>> According to this DSL route, the files created in the dir c:/temp/test
>> will
>> be read, parsed and transformed using a CsvDataFormat. Next, the result
>> of
>> this tranformation will be placed into a queue (test.queue).
>>
>> My question is the following ?
>>
>> Is it possible to add a property/header to the messages posted in a
>> queue ?
>>
>> from("file:///c:/temp/test?noop=true")
>> .unmarshal().csv()
>> .setProperty("Client", "Jack")
>> .to("test-jms:queue:test.queue");
>>
>> The idea is that in the next route, I can check the property/header name
>> and
>> depending on the value I can process differently the messages.
>
> Absolutely!
>
> We have properties on an Exchange which are intended to be transient
> things during the processing, then headers on a Message which are
> typically intended to travel over the wire (some endpoints might
> filter out or transform some headers).
>
> So if you use
>
> from("file:///c:/temp/test?noop=true")
> .unmarshal().csv()
> .setHeader("Client", "Jack")
> .to("test-jms:queue:test.queue");
>
> it will populate the JMS header "Client"
>
> I guess part of the confusion is the JMS API refers to them as
> 'properties' :) We've kinda used HTTP/email style terminology for
> headers & properties which might cause confusion.
>
> --
> James
> -------
> http://macstrac.blogspot.com/
>
> Open Source Integration
> http://open.iona.com
>
>
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