Dynamically variable in Camel

[Elezabeth <El...@ibsplc.com>]

Hi ,

I am new to Camel. 

My requirement is something like this . I have to read a csv file in a
folder when an HTTP url is invoked. 

This is fine. But I will get a url with a requestparameter called "fileName" 
and now this is the name of that csv file which i have to read. 

Eg;

if my url is*/ http://localhost/test?filename=sample-2.csv/* , then I have
to read *sample-2.csv *from that folder.
I tried doing this in either way - using XML  and using Java code.

This is how I configured the route

public class OagBuilder extends RouteBuilder {

	CamelContext camelContext = new DefaultCamelContext();
	DataFormat bindy = new BindyCsvDataFormat(
			"jp.co.airlink.gavss.adapter.eai.oag.job");
	String file = null;

	public void add(Exchange exchnage){
		
		file= (String) exchnage.getIn().getHeader("filename");
	}
	
	@Override
	public void configure() throws Exception {
		
	
from("jetty:http://localhost:8080/test").inOnly("seda:myfile").to("bean:oagProcessor?method=add");	 
		//file= Exchange.HTTP_QUERY.split("filename");
		//System.out.println("fileis " + file) ;
		from("seda:myfile").pollEnrich("file:d:/a/?fileName=" +
file).unmarshal(bindy).to("bean:validateFileInput?method=configure");
	}

}

I am not getting the value of the variable "file" in the second route.

Can anyone help me . 






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Re: Dynamically variable in Camel

[Claus Ibsen <cl...@gmail.com>]

Hi

The RouteBuilder configure method is only invoked once, to setup the
Camel routes.

So if you want in the 2nd route to refer to a file name from a header,
you can use the file/simple language for that.

 from("seda:myfile").pollEnrich("file:d:/a/?fileName=" +
 file).unmarshal(bindy).to("bean:validateFileInput?method=configure");

Should be

 from("seda:myfile").pollEnrich("file:d:/a/?fileName=${header.filename}")
.unmarshal(bindy).to("bean:validateFileInput?method=configure");

eg notice the fileName parameter refers to a header with the key filename.

Some links to check:

http://camel.apache.org/simple.html
http://camel.apache.org/file-language.html
http://camel.apache.org/file2

On Mon, Sep 17, 2012 at 12:13 PM, Elezabeth
<El...@ibsplc.com> wrote:
> Hi ,
>
> I am new to Camel.
>
> My requirement is something like this . I have to read a csv file in a
> folder when an HTTP url is invoked.
>
> This is fine. But I will get a url with a requestparameter called "fileName"
> and now this is the name of that csv file which i have to read.
>
> Eg;
>
> if my url is*/ http://localhost/test?filename=sample-2.csv/* , then I have
> to read *sample-2.csv *from that folder.
> I tried doing this in either way - using XML  and using Java code.
>
> This is how I configured the route
>
> public class OagBuilder extends RouteBuilder {
>
>         CamelContext camelContext = new DefaultCamelContext();
>         DataFormat bindy = new BindyCsvDataFormat(
>                         "jp.co.airlink.gavss.adapter.eai.oag.job");
>         String file = null;
>
>         public void add(Exchange exchnage){
>
>                 file= (String) exchnage.getIn().getHeader("filename");
>         }
>
>         @Override
>         public void configure() throws Exception {
>
>
> from("jetty:http://localhost:8080/test").inOnly("seda:myfile").to("bean:oagProcessor?method=add");
>                 //file= Exchange.HTTP_QUERY.split("filename");
>                 //System.out.println("fileis " + file) ;
>                 from("seda:myfile").pollEnrich("file:d:/a/?fileName=" +
> file).unmarshal(bindy).to("bean:validateFileInput?method=configure");
>         }
>
> }
>
> I am not getting the value of the variable "file" in the second route.
>
> Can anyone help me .
>
>
>
>
>
>
> --
> View this message in context: http://camel.465427.n5.nabble.com/Dynamically-variable-in-Camel-tp5719462.html
> Sent from the Camel - Users mailing list archive at Nabble.com.



-- 
Claus Ibsen
-----------------
FuseSource
Email: cibsen@fusesource.com
Web: http://fusesource.com
Twitter: davsclaus, fusenews
Blog: http://davsclaus.com
Author of Camel in Action: http://www.manning.com/ibsen

Re: Dynamic variable in Camel

[Elezabeth <El...@ibsplc.com>]

Hi ,

I tried the way u suggested , but still it is not working .. 

While searching I came across a link in which it is mentioned that for
*PollEnrich* , the ${ } is not working... 

This is the link :

https://issues.apache.org/jira/browse/CAMEL-4596

Can you suggest any other way?

Thanks in advance
Elz



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