[jira] [Updated] (CAMEL-5579) Add an abstract grouped by aggregator strategy that users can extend from.

["Claudio Corsi (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CAMEL-5579?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Claudio Corsi updated CAMEL-5579:
---------------------------------

    Attachment: GroupedByExchangeAggregationStrategy.java
                AbstractGroupedByValueAggregationStrategy.java

Here are the sources that implements this improvement to the grouped by aggregation strategy approach.  This will then simplify the task of implementing a grouped by aggregation strategy by extending this class instead and not having the re-implement what the default grouped by process already does.

I have also include an example of extending this class so that it does the same thing as the already existing grouped by exchange aggregation strategy class.

                
> Add an abstract grouped by aggregator strategy that users can extend from.
> --------------------------------------------------------------------------
>
>                 Key: CAMEL-5579
>                 URL: https://issues.apache.org/jira/browse/CAMEL-5579
>             Project: Camel
>          Issue Type: Improvement
>          Components: camel-core
>            Reporter: Claudio Corsi
>            Priority: Minor
>              Labels: camel-core,
>             Fix For: 2.11.0
>
>         Attachments: AbstractGroupedByValueAggregationStrategy.java, GroupedByExchangeAggregationStrategy.java
>
>
> The current GroupedExchangeAggregationStrategy will combine a list of exchange instances for a given correlation expression and propagate the exchange with that list.   This is great as long as users are content with processing the list of exchanges.  
> What about users that would like to extract data from the exchange and add that to the forwarded list?  This is something that require users to create their own strategy.
> What I propose is that we provide base class for users to extend such that it manages the grouped list and have the user state and return the type of instances that will be added to the grouped list.
> I will attach a base class that users can extend and an example of a sub-classed version that will return a list of exchange instances like the default GroupedExchangeAggregateStrategy camel core class.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira