For comparing XML I would google or have a look at XMLUnit [1].
AFAI understand Camel it reacts on one message. But you want to compare two
files.
So the message could contain the content of both files.
from("direct:in")
.bean(MyXmlDiff.class, "compare(${headers.XML_ONE}, ${headers.XML_TWO}")
.to("velocity:...")
.to("direct:out")
I assume that the content of both files is available via the two message
headers XML_ONE and XML_TWO.
I use bean binding [3] for invoking my custom bean.
That uses XMLUnit for just doing the comparison
public class MyXmlDiff {
public String compare(String xml1, String xml2) {
StringBuilder rv = new StringBuilder;
Diff xmlunitDiff = new Diff(xml1, xml2);
if (xmlunitDiff.similar()) {
// use XMLUnit classes for getting the diffs and add
// them to this return value.
rv.add(...);
}
// The return value of this method is the body
// of the next Camel step.
return rv.toSting();
}
}
Then use a template language for generating the final artifact.
Because I am not sure if headers are copied via the bean binding, maybe use
message properties instead.
Jan
[1] http://xmlunit.sourceforge.net/
[2] https://camel.apache.org/bean-binding.html
> -----Ursprüngliche Nachricht-----
> Von: Stephen Cameron [mailto:[email protected]]
> Gesendet: Montag, 5. Mai 2014 05:59
> An: [email protected]
> Betreff: comparing two XML files
>
> Hi,
>
> I want to do a data processing task, that involves comparing the
> contents of two XML files. This is simply to match the equivalent
> record in the second for every record in the first, make a decision by
> comparing these matches, then generate a third file with the actions
> messages based on the the comparison result.
>
> If there is no match made that is another message type that needs to be
> created.
>
> I procedural code this is a inner and outer loop kind of situation. How
> can I set up the same thing in Camel. Or, should I write some custom
> code to do it?
>
> Thanks for your advice, or pointing me in a good direction.
>
> Steve Cameron
