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ASF GitHub Bot commented on SCB-706:
------------------------------------

liubao68 opened a new pull request #803:  [SCB-706]change filters to discovery 
filters and support invocation based filters
URL: https://github.com/apache/incubator-servicecomb-java-chassis/pull/803
 
 
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> refactor loadbalance filters logic to support invocation based filter
> ---------------------------------------------------------------------
>
>                 Key: SCB-706
>                 URL: https://issues.apache.org/jira/browse/SCB-706
>             Project: Apache ServiceComb
>          Issue Type: Improvement
>            Reporter: liubao
>            Assignee: liubao
>            Priority: Major
>
> Why we do this?
>  # When implement invocation based filter, e.g. darklaunch deployment, we 
> need to filter servers based on invocation parameters. But now, we create a 
> Loadbalaner instance for each service, and Robin filter interface can not 
> pass Invocation to it. Before refactor, we doing this by ThreadLocal and 
> cache Invocation, and use in filter implementation. This is error prone and 
> users can't handle this complixity
>  # We have other improvements, e.g. SCB-700, we can do server status check, 
> and add a filter a choose from active servers. We need to consider filter 
> orders and other feature, current implementation not satisfy this.
>  # We want to make loadbalance code handy by remove some compatible fixes. 



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