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https://issues.apache.org/jira/browse/GEODE-3646?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Brian Baynes updated GEODE-3646:
--------------------------------
    Description: 
As a dev using the new protocol, I need to be able to update an entry that 
already exists, receiving an error if the key is not already in the cache.

Create "update" message.

Client should receive error if key does not already exist. Put should only 
succeed if key was already present.

  was:
As a user of Geode's new client/server protocol, I need to be able to put 
(replace) an entry if and only if the key already exists in the region.
Add replace-only-if-present message to new protocol.


        Summary: Protobuf: Add update message  (was: Add 
replace-only-if-present message)

> Protobuf: Add update message
> ----------------------------
>
>                 Key: GEODE-3646
>                 URL: https://issues.apache.org/jira/browse/GEODE-3646
>             Project: Geode
>          Issue Type: New Feature
>          Components: client/server
>            Reporter: Brian Baynes
>            Priority: Major
>
> As a dev using the new protocol, I need to be able to update an entry that 
> already exists, receiving an error if the key is not already in the cache.
> Create "update" message.
> Client should receive error if key does not already exist. Put should only 
> succeed if key was already present.



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