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https://issues.apache.org/jira/browse/PROTON-264?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Keith Wall closed PROTON-264.
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> Proton-J and Proton-C transports make inconsistent use of return values 
> within methods input and output
> -------------------------------------------------------------------------------------------------------
>
>                 Key: PROTON-264
>                 URL: https://issues.apache.org/jira/browse/PROTON-264
>             Project: Qpid Proton
>          Issue Type: Bug
>          Components: proton-c, proton-j
>    Affects Versions: 0.4
>            Reporter: Keith Wall
>            Assignee: Keith Wall
>            Priority: Minor
>             Fix For: 0.5
>
>
> This defect refers to the transport interface already in the process of being 
> deprecated by PROTON-225.  The scope of PROTON-225 has been increased (=noted 
> in Jira) to ensure that this defect is not carried forward to the new 
> interface and we end up with consistent behaviour.
> Currently, in Proton-C pn_transport_output() returns PN_EOS (=-1) to signal 
> that the Transport will produce no further output, and  pn_transport_input() 
> returns PN_EOS to signal that the Transport will accept no further input.   
> However, Proton-J, output always returns the number bytes output (even if 
> zero), and input returns the number of bytes accepted (again even if zero).
> This difference presents a problem to tests utilising the Proton-JNI binding. 
>   As a temporary workaround, JNITransport class will changed to hide this 
> difference from the caller.

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