Location of Persistent UserAdmin Data

headers Pascal Rapicault | 4 Jun 2006 11:09

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<br>Eclipse update is not in a position
of deciding with full satisfaction of the user whether things should be
"updated", "installed", "uninstalled then installed".
For example, if one had junit 3.8 and wanted to install junit 4.0... what
should happen? For that it needs to 
<br><br>If OSGi was not alwasys tightening up
its lose ends with the magic "management agent" 
<br><br>PaScaL
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<td width="40%">Thomas Watson &lt;tjwatson@...&gt;

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<p>06/01/2006 02:28 PM
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<td valign="top">Re: [equinox-dev] Location
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See bug https://bugs.eclipse.org/bugs/show_bug.cgi?id=73013 against Eclipse-&gt;Platform-&gt;Update.
<br><br>
If eclipse update would use the proper Bundle.update method instead of
uninstalling/installing each time a new version of a bundle bacame available
then these types of issues would be solved. <br><br>
Tom <br><br><br><br>
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<td width="37%">Roy Paterson/Austin/IBM <at> IBMUS
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<p>06/01/2006 01:04 PM

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BJ's answer is correct from an OSGi spec standpoint, but there are Eclipse<br>
considerations which are relavant to Benjamin's questions. &nbsp;See<br>
http://bugs.eclipse.org/bugs/show_bug.cgi?id=124176#c10.<br><br>
In summary bundle ids do not change between framework launches, but if
you<br>
update a bundle using Eclipse update it actually uninstalls the old version<br>
and installs the new version, resulting in a new bundle id. &nbsp;This
was an<br>
issue with the OSGi Prefs implementation. &nbsp;In the end we just documented
it<br>
as a known limitation.<br><br>
Regards,<br>
Roy<br><br>
-----------------------------------------<br>
Roy Paterson<br>
IBM Pervasive Computing<br>
Austin, TX<br>
Phone: (512) 838-8898<br><br><br><br>
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&nbsp;Subject <br>
 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;06/01/2006 12:20 &nbsp; &nbsp;
&nbsp; &nbsp; &nbsp;Re: [equinox-dev] Location of &nbsp; &nbsp; &nbsp;
<br>
 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;PM &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Persistent UserAdmin
Data &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br>
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Bundle ids cannot change between framework launches. The bundle id is the<br>
primary key of the bundle and may not change or ever be reused within a<br>
framework instance.<br><br>
BJ Hargrave<br>
Senior Technical Staff Member, IBM<br>
OSGi Fellow and CTO of the OSGi Alliance<br>
hargrave@...<br>
Office: +1 407 849 9117 Mobile: +1 386 848 3788<br><br><br><br>
"Benjamin Schmaus" &lt;benjamin.schmaus@...&gt;<br>
Sent by: equinox-dev-bounces@...<br>
2006-06-01 12:46 PM<br>
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Subject<br>
[equinox-dev] Location of Persistent UserAdmin Data<br><br><br><br><br><br><br>
Equinox Developers,<br><br>
I've been developing a user/group admin bundle that runs on top of the<br>
Equinox OSGi UserAdmin service &nbsp;implementation, and I've noticed that
data<br>
is persisted to a file that is named like so:<br><br>
"org.eclipse.core.runtime.preferences.OSGiPreferences." +<br>
bundle.getBundleId()<br><br>
So the actual file name might end up being something like:<br>
"org.eclipse.core.runtime.preferences.OSGiPreferences.27.prefs"<br><br>
Since a bundle's id can change between framework starts and stops, users<br>
and roles created by a given bundle during one execution of the framework<br>
won't necessarily be available to that bundle in another execution of the<br>
framework ( i.e. since bundle id can vary across runs).<br><br>
Should a bundle have to re-create user and role assignments on every start<br>
of the framework if persistent data can't be located? &nbsp;That doesn't
seem<br>
right to me.<br><br>
It could be that user admin data can be persisted to a static (known<br>
before runtime) location via the Equinox UserAdmin impl, but it's not<br>
clear to me how this should be done.<br><br>
- Ben Schmaus_______________________________________________<br>
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Re: Location of Persistent UserAdmin Data