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https://issues.apache.org/jira/browse/SCB-209?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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WeiChao resolved SCB-209.
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Resolution: Fixed
> pullTask,use rev to ensure data consistency and reduce service center work
> load
> -------------------------------------------------------------------------------
>
> Key: SCB-209
> URL: https://issues.apache.org/jira/browse/SCB-209
> Project: Apache ServiceComb
> Issue Type: Improvement
> Components: Java-Chassis
> Reporter: WeiChao
> Assignee: WeiChao
> Priority: Major
> Fix For: java-chassis-1.0.0-m2
>
>
> When pull task,SC will return to the result with the version number
> X-Resource-Revision in the HEADER，SDK recodes this rev and sends it to SC at
> the next request.
> If the rev of SDK is greater than or equal to the rev of SC, it means that
> SDK no need to refresh, SC doesn't need to be processed, and returns 304 to
> indicate that SDK's cache is not refreshed.
> If the rev of SDK is less than SC's rev, SC returns the updated result set to
> SDK, SDK refreshes the cache and updates the Rev.
> The effect is that SDK requests different SC and does not have data
> inconsistencies, at the same time reducing the amount of data transmission in
> the channel
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