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Date: Wed, 21 Sep 2016 08:45:46 +0800
From: Willem Jiang <willem.jiang@gmail.com>
To: users@camel.apache.org, Emre Kartoglu Ismail
 <ismailemrekartoglu@gmail.com>
Message-ID: <etPan.57e1d83a.1f536eb2.1641@gmail.com>
In-Reply-To: <e4557e4d-d623-2a7f-567f-813991e42945@gmail.com>
References: <e4557e4d-d623-2a7f-567f-813991e42945@gmail.com>
Subject: Re: rabbitmq component headers
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archived-at: Wed, 21 Sep 2016 00:46:59 -0000

Even you specify the routingKey in the rabbitmq uri, camel cannot find ou=
t the exchange name without checking it from message header.
So you cannot comment out the exchange name setting part.=C2=A0

-- =20
Willem Jiang


Blog: http://willemjiang.blogspot.com (English) =20
http://jnn.iteye.com (Chinese)
Twitter: willemjiang =20
Weibo: =E5=A7=9C=E5=AE=81willem


On September 21, 2016 at 5:14:54 AM, Emre Kartoglu Ismail (ismailemrekart=
oglu=40gmail.com) wrote:
> Hello Camel users,
> =20
> I have a question regarding the camel-rabbitmq component. The following=

> code sends the message =E2=80=9Ctest=E2=80=9D to exchange =E2=80=9CA=E2=
=80=9D with routing key =E2=80=9CB=E2=80=9D every
> 5 seconds:
> =20
> =20
> from(=22timer:test=3Fperiod=3D5000=22).process(new Processor() =7B
> =40Override
> public void process(Exchange exchange) throws Exception =7B
> exchange.getOut().setBody(=22test=22, String.class);
> exchange.getOut().getHeaders().put(=22rabbitmq.EXCHANGE=5FNAME=22, =22A=
=E2=80=9D); **
> exchange.getOut().getHeaders().put(=22rabbitmq.ROUTING=5FKEY=22, =22B=E2=
=80=9D); **
> =7D
> =7D)
> .to(=22rabbitmq://localhost/A=3Fusername=3Dguest&password=3Dguest&routi=
ngKey=3DB&threadPoolSize=3D1&autoAck=3Dfalse=22); =20
> =20
> =20
> =20
> However when I comment out the lines with **, the message does not get
> sent. Is this an expected behaviour=3F I found this stack overflow post=
,
> essentially discussing the same issue:
> http://stackoverflow.com/questions/22449086/apache-camel-rabbitmq-endpo=
int-not-creating =20
> .
> =20
> There is a paragraph at http://camel.apache.org/rabbitmq.html that says=

> =20
> =22Headers are set by the consumer once the message is received. The
> producer will also set the headers for downstream processors once the
> exchange has taken place. Any headers set prior to production that the
> producer sets will be overridden.=E2=80=9D
> =20
> The last sentence seems to suggest that the behaviour I described here
> is expected. My question then is would it not make more sense if we did=

> not have to specifically set the headers in the out message=3F
> =20
> =20
> Kind regards,
> Ismail
> =20