Vladislav Sokolov created CAMEL-14602:
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Summary: Removed String headers appears in next endpoints
Key: CAMEL-14602
URL: https://issues.apache.org/jira/browse/CAMEL-14602
Project: Camel
Issue Type: Bug
Components: camel-core
Affects Versions: 2.22.5
Reporter: Vladislav Sokolov
Hello,
I create this issue because we noticed a strange behaviour with headers in
apache camel.
I say "strange behaviour" because we didn't find anything in documentation
about it. Maybe it's a normal behaviour, and we would like to see the part of
documentation which talks about it.
h2. Context
In our project, we have a bean which computes next endpoints and gives them to
the recipientList. It looks like this :
{code:java}
<routes>
<route>
<!-- our logic -->
<recipientList>
<method ref="ourBean" method="ourMethod"/>
</recipientList>
</route>
</routes>
{code}
In ourMethod(), we manipulate headers(create, modify, remove).
h2. Issue
However, inside ourMethod(), when we remove a header with
{code:java}
exchange.getIn().removeHeader(headerToRemove){code}
The removed headers appears again in the next route.
ourMethod looks like this :
{code:java}
public String ourMethod(Exchange exchange,@Header("ourHeader") String
headerToRemove) {
//some logic
if (!StringUtils.isEmpty(headerToRemove)){
//some logic
exchange.getIn().removeHeader(headerToRemove);
}
}
{code}
So with this code, the header is removed from exchange, but re-appears in the
next endpoint.
We have a workaround :
{code:java}
public String ourMethod(Exchange exchange,@Header("ourHeader") String
headerToRemove) {
//some logic
if (!StringUtils.isEmpty(headerToRemove)){
//some logic
exchange.getIn().setHeader(headerToRemove, "");
}
}
{code}
Instead of removing it, we set its value to an empty string.
h2. Explanations
We're puzzled, we don't understand if this should be a correct behaviour or
not. If yes, can you give us some explanations ?
Best Regards,
Vlad
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