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From "Kathey Marsden (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-974) ClientDriver can lose some connection properties
Date Sun, 09 Jul 2006 17:56:30 GMT
    [ http://issues.apache.org/jira/browse/DERBY-974?page=comments#action_12419927 ] 

Kathey Marsden commented on DERBY-974:

Hello Michael if you you are still monitoring this issue. I wanted to follow up  and see if
 if you were still interested in pursuing posting a patch to  issue.  It seems like it would
be very useful for Network Client not to lose properties.    I hope that Deepa's  comment
answered your questions about creating a patch and tests.

I looked briefly at  ProperiesTest.java and see that  it does show  how using keys()  would
be a problem. I think though that it would be good as Deepa said to have a reproducible case/test
to show the functional  impact with  Derby.

I will be happy to try out and review your patch/repro  if/when you  submit it.    Please
let us know if you are still interested in working on this issue.  

> ClientDriver can lose some connection properties
> ------------------------------------------------
>          Key: DERBY-974
>          URL: http://issues.apache.org/jira/browse/DERBY-974
>      Project: Derby
>         Type: Bug

>   Components: Network Client
>     Versions:,
>  Environment: Linux, Sun JRE 1.5
>     Reporter: Michael Hackett
>     Priority: Minor
>  Attachments: ClientDriver.java-diff, PropertiesTest.java
> Internally, the ClientDriver class's appendDatabaseAttributes() method uses keys() on
the connection properties to get a list of the property names. However, this misses any properties
in the default set. The correct method for a Properties object is propertyNames(). This will
return the same type of object as keys(), but will include all properties.
> (It is unfortunate that Sun chose to make Properties a subclass of Hashtable, instead
of giving Properties a Hashtable, as the former exposes too much implementation.)
> The fix is to simply replace calls to keys() on all Property objects to use propertyNames().
A quick search revealed that this is not the only place in the code base where this is done,
so a more thorough scan should be made.

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