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 [Facebook]<http://www.facebook.com/Finansbank> [Twitter] <http://twitter.com/finansbank> [https://www.finansbank.com.tr/Disclaimer/BannerImages.aspx?date=13.04.201611:5100]<https://www.finansbank.com.tr/Disclaimer/Bannerlink.aspx?date=13.04.201611:5100> Bu e-posta'nın içerdiği bilgiler (ekleri dahil olmak üzere) gizlidir. Onayımız olmaksızın üçüncü kişilere açiklanamaz. Bu mesajın gönderilmek istendiği kişi değilseniz, lütfen mesajı sisteminizden derhal siliniz. IBTech A.Ş. bu mesajın içerdiği bilgilerin doğruluğu veya eksiksiz olduğu konusunda bir garanti vermemektedir. Bu nedenle bilgilerin ne şekilde olursa olsun içeriğinden, iletilmesinden, alınmasından, saklanmasından sorumlu değildir. Bu mesajın içeriği yazarına ait olup, IBTech A.Ş.'nin görüşlerini içermeyebilir. The information contained in this e-mail (including any attachments)is confidential. It must not be disclosed to any person without our authority. If you are not the intended recipient, please delete it from your system immediately. IBTech A.S. makes no warranty as to the accuracy or completeness of any information contained in this message and hereby excludes any liability of any kind for the information contained therein or for the information transmission, reception, storage or use of such in any way whatsoever. Any opinions expressed in this message are those of the author and may not necessarily reflect the opinions of IBTech A.S.
