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https://issues.apache.org/jira/browse/CAMEL-5628?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claus Ibsen updated CAMEL-5628:
-------------------------------
Priority: Minor (was: Major)
Fix Version/s: (was: 2.11.0)
Future
> Sticky load balancer to support initial call problem for example with http
> session ids
> --------------------------------------------------------------------------------------
>
> Key: CAMEL-5628
> URL: https://issues.apache.org/jira/browse/CAMEL-5628
> Project: Camel
> Issue Type: Improvement
> Components: camel-core, eip
> Affects Versions: 2.10.0
> Reporter: Claus Ibsen
> Priority: Minor
> Fix For: Future
>
>
> If you use the sticky load balancer over http endpoints, and want to use the
> http session id as correlation expression, then you may have a problem on the
> initial call (eg no http session yet). Then the correlation expression would
> yield empty/null.
> We should add an option to the sticky load balancer, in that case, when the
> correlation expression is empty/null, to pick a random (or we can do round
> robin) endpoint, and then *after* the call, then execute the correlation
> expression again, to grab the value (eg such as a http session). Then it
> should use this matching for the future so on the next call it will pick the
> same http endpoint again.
> The trick though is that the algorithm is no longer a simple hashing. But
> would need to be per client. And as we don't want to keep this matching list
> forever in Camel, we would need to use a LRUCache so the matching can expire
> if not in use. And for that we should offer an option to set the idle timeout
> value. So you can match that with eg the http session timeout. For example 30
> minutes etc.
> This would make it much easier to use Camel as http load balancer with the
> http session id from the remote http endpoints.
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