Ken Paulsen wrote:
>
> Hi Kedar,
>
> Is there an existing Java EE api or GlassFish-specific API which does
> this?
>
> The Preferences API does what you described. However, it's a Java SE
> feature which uses XML files by default stored in the process (GF's
> process in this case) user's home directory.
Not so. It is platform dependent. On Windows it goes into the Windows
Registry by default.
>
> If GF provided a backing store implementation of the Preferences API
> would could implement a "persistent session" scope for web developers,
> or perhaps a persistent *application* scope as well (that ignores the
> current user -- the Preference API supports both concepts, i.e. Sytem
> and User preferences).
>
> Ken
>
>
> Kedar Mhaswade wrote:
>> Hi Ken,
>>
>> Maybe I am not understanding it well, but a user who is
>> an authenticated administrator of a web-application -- shouldn't
>> the preferences of such a user be stored on the app server that
>> serves that app? Doing it this way solves the problems below,
>> isn't it?
>>
>> -Kedar
>>
>>
>> Ken Paulsen wrote:
>>>
>>> Hi Lloyd,
>>>
>>> Thanks for the response, see my comments below.
>>>
>>>
>>> Lloyd Chambers wrote:
>>>> Ken,
>>>>
>>>> First, what kind of preferences are being stored?
>>> For our use (#1 in my original email), I'm looking for a way to
>>> store admin user preferences. this would include things like their
>>> favorite common tasks, customized help notes on pages, or other
>>> preferences that customize the admin console GUI.
>>>> Is this for developer or production use?
>>> For production.
>>>> My initial thought is that the user running Glassfish is
>>>> problematic. The user could be "root" or "_appserver" or "ken" or
>>>> "lloyd". But the user using the GUI is "admin" or "admin1", etc. So
>>>> shouldn't preferences be tied to the administrative user? It
>>>> doesn't make sense to me to associate them with the system user
>>>> running the server.
>>> Yes, this is true. So the "scope" would be application scope and we
>>> would either not store console-user specific data at all, or store
>>> it in a way where our application logic does the security checking
>>> to ensure information is not shared across users.
>>>
>>> If #2 in my email was implemented, then it could respect Java EE
>>> authenticated users (in addition to storing it in a location that is
>>> specific to the container vs. ~/.java). This would solve that part
>>> of the problem.
>>>
>>> Ken
>>>>
>>>> Lloyd
>>>>
>>>> On Aug 15, 2008, at 10:23 AM, Ken Paulsen wrote:
>>>>
>>>>>
>>>>> Hi everyone,
>>>>>
>>>>> I wanted to float an idea and see what people think. Java provides
>>>>> a "Preferences API"
>>>>> (http://java.sun.com/j2se/1.5.0/docs/api/java/util/prefs/Preferences.html).
>>>>> The default backing store for this api (on Linux anyway) stores
>>>>> the preference data in XML files in "~/.java/.userPrefs/*". This
>>>>> means if you use this API in GlassFish, the user running the GF
>>>>> process will get files put in their ~/.java/.userPrefs directory.
>>>>> If you move the application server or switch users which run GF,
>>>>> this preference data will be lost (unless you migrate the
>>>>> preference data also).
>>>>>
>>>>> I have 2 things I'd like feedback on:
>>>>>
>>>>> 1) Would it be acceptable for the GF Admin Console web application
>>>>> to use this API to store preferences knowing that it has the above
>>>>> limitations?
>>>>>
>>>>> 2) What do you think about adding a Java EE backing store that
>>>>> behaved more appropriately in a Java EE environment? This might be
>>>>> a nice developer-oriented feature to support in Java EE (or
>>>>> perhaps as a GlassFish value-add).
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Ken
>>>>>
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>>>>
>>>>
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Byron Nevins Work 408-276-4089, Home 650-359-1290, Cell 650-784-4123 - Sun Microsystems, Inc.