Or use an AtomicInteger or some other pojo to hold the value as a
reference. Java is copy by value
http://stackoverflow.com/questions/40480/is-java-pass-by-reference-or-pass-by-value
On Wed, Apr 13, 2016 at 12:57 PM, Siano, Stephan <stephan.si...@sap.com> wrote:
> Hi,
>
> If you manage to access your variable with a simple expression this should
> work (e.g. if a is a static field of YourRouteBuilder class, you might be
> able to access it as ${your.package.YourRouteBuilderClass.a}), though I have
> never tried that. A processor might be easier.
>
> Best regards
> Stephan
>
> -----Original Message-----
> From: Kasim Sert (Ibtech-Software Infrastructure)
> [mailto:kasim.s...@ibtech.com.tr]
> Sent: Mittwoch, 13. April 2016 12:08
> To: users@camel.apache.org
> Subject: RE: Changing header value
>
> Hi,
>
> You mean since its a constant expression it is evaluated at the beginning and
> not changed after as far as I understand. So can I do it with simple
> expression instead of constant or should I introduce new processor to make it
> read current value of variable a.
>
> Thank you.
>
> -----Original Message-----
> From: Siano, Stephan [mailto:stephan.si...@sap.com]
> Sent: Wednesday, April 13, 2016 12:11 PM
> To: users@camel.apache.org
> Subject: RE: Changing header value
>
> Hi,
>
> At the beginning of the route you are setting the header to the value a has
> when the route is started (it's a constant expression). In the processor you
> are incrementing the value and are then setting the header to the current
> value of the variable a, so the route behaves as one would expect.
>
> Best regards
> Stephan
>
> -----Original Message-----
> From: Kasim Sert (Ibtech-Software Infrastructure)
> [mailto:kasim.s...@ibtech.com.tr]
> Sent: Mittwoch, 13. April 2016 10:52
> To: users@camel.apache.org
> Subject: Changing header value
>
> Hi,
>
> Can somebody please explain, why header value for starting always remains
> same although its changed in processor ?
>
> Route:
> İnt a=1
> from("timer://myTimer2?period=1000")
> .setHeader("myheader", constant(a))
> .log("starting...${header[myheader]}")
> .process(new Processor() {
> @Override
> public void process(Exchange exchange)
> throws Exception {
> a = a+1 ;
>
> exchange.getIn().setHeader("myheader", constant(a));
> Thread.sleep(10000);
> }
> })
> .log("ending...${header[myheader]}");
>
>
> Log produced:
>
> 2016-04-13 11:45:47,894 [imer://myTimer2] INFO route1
> - starting...1
> 2016-04-13 11:45:57,899 [imer://myTimer2] INFO route1
> - ending...2
> 2016-04-13 11:45:57,900 [imer://myTimer2] INFO route1
> - starting...1
> 2016-04-13 11:46:07,900 [imer://myTimer2] INFO route1
> - ending...3
> 2016-04-13 11:46:07,900 [imer://myTimer2] INFO route1
> - starting...1
> 2016-04-13 11:46:17,901 [imer://myTimer2] INFO route1
> - ending...4
>
>
>
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-----------------
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