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https://issues.apache.org/jira/browse/CAMEL-4169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13058497#comment-13058497
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Richard Kettelerij commented on CAMEL-4169:
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Marco, note that you can work around this limitation in the Simple Language by
using one of the other languages supported in Camel. Like OGNL, MVEL and SpEL.
I know the latter two support calculations.
> simple calculations in route
> ----------------------------
>
> Key: CAMEL-4169
> URL: https://issues.apache.org/jira/browse/CAMEL-4169
> Project: Camel
> Issue Type: New Feature
> Components: camel-core
> Affects Versions: 2.7.2
> Reporter: Marco Westermann
> Priority: Minor
> Fix For: Future
>
>
> create calculation possibilities in simple language. For example to increment
> a header property: ${header.counter}++
> example:
> from("direct:getLastValueFromCache")
> .transform().simple("${header.lastProcessedOrder}++")
> .to("direct:createNewOrderWithNewProcessingNumber");
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