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https://issues.apache.org/jira/browse/CAMEL-7448?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Elvio Caruana updated CAMEL-7448:
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Description:
Throttler Documentation [1] states "If the header is absent, then the Throttler
uses the old value. So that allows you to only provide a header if the value
is to be changed".
however if the expression evaluates to null (header missing from message) the
Throttler throws an exception (Throttler.java:108).
The workaround is to ensure that all messages carry the value (if the value is
the same no changes will take affect). Adding an option to turn this on and off
(e.g. allowNullException) would make it much easier to use (as per camel-users
thread [2]).
[1] http://camel.apache.org/throttler.html
[2]
http://camel.465427.n5.nabble.com/throttle-EIP-unchanged-value-td5751300.html
was:
Throttler Documentation [1] states "If the header is absent, then the Throttler
uses the old value. So that allows you to only provide a header if the value
is to be changed".
However:
.throttle(header("throttleHeader"))
however if the above evaluates to null (header missing from message) the
Throttler throws an exception (Throttler.java:108).
The workaround is to ensure that all messages carry the value (if the value is
the same no changes will take affect). Adding an option to turn this on and off
(e.g. allowNullException) would make it much easier to use (as per camel-users
thread [2]).
[1] http://camel.apache.org/throttler.html
[2]
http://camel.465427.n5.nabble.com/throttle-EIP-unchanged-value-td5751300.html
> throttle EIP - unchanged value
> ------------------------------
>
> Key: CAMEL-7448
> URL: https://issues.apache.org/jira/browse/CAMEL-7448
> Project: Camel
> Issue Type: Bug
> Components: camel-core, eip
> Affects Versions: 2.13.1
> Reporter: Elvio Caruana
> Priority: Minor
>
> Throttler Documentation [1] states "If the header is absent, then the
> Throttler uses the old value. So that allows you to only provide a header if
> the value is to be changed".
> however if the expression evaluates to null (header missing from message) the
> Throttler throws an exception (Throttler.java:108).
> The workaround is to ensure that all messages carry the value (if the value
> is the same no changes will take affect). Adding an option to turn this on
> and off (e.g. allowNullException) would make it much easier to use (as per
> camel-users thread [2]).
> [1] http://camel.apache.org/throttler.html
> [2]
> http://camel.465427.n5.nabble.com/throttle-EIP-unchanged-value-td5751300.html
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