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List:       subversion-issues
Subject:    [Issue 4570] New - Add sane error information to JavaHL
From:       rhuijben () tigris ! org
Date:       2015-03-06 14:21:34
Message-ID: iz4570 () subversion ! tigris ! org
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http://subversion.tigris.org/issues/show_bug.cgi?id=4570
                 Issue #|4570
                 Summary|Add sane error information to JavaHL
               Component|subversion
                 Version|1.9.x
                Platform|All
                     URL|
              OS/Version|All
                  Status|NEW
       Status whiteboard|
                Keywords|
              Resolution|
              Issue type|DEFECT
                Priority|P3
            Subcomponent|bindings_javahl
             Assigned to|issues@subversion
             Reported by|rhuijben






------- Additional comments from rhuijben@tigris.org Fri Mar  6 06:21:33 -0800 2015 -------
Currently JavaHL apis only have the (potentially localized) error output to see 
why some operation failed.

This error output includes generic messages for error codes, where the creator 
of the error intended specific messages... so the resulting message is not what 
a user would expect *and* not an easy way for applications to access the 
problem causes.

Eventually we should try to:
* Provide an easy way to access to causes of problems.
Probably a combination of creating multiple exception types, extending the 
ClientException. Perhaps providing access to error codes/error classes?

* Marshal the JavaHL exceptions through Subversion, using similar magic as that 
in SharpSVN. (Errors have their own pool and we can attach information to 
that... and pool cleanup handles the case where Subversion decides to ignore 
the error). This allows handling Java errors as Java errors.

* Make it easy to generate a valuable end-user message, similar to what is 
shown in other clients.
Without the 'freely added' generic messages in unexpected places in the chain, 
etc.

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