Home » Eclipse Projects » Remote Application Platform (RAP) » Store Initial Parameters from web.xml
| Store Initial Parameters from web.xml [message #117589] |
Tue, 06 January 2009 10:55  |
Eclipse User |
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Originally posted by: benjamin.wolff.web.de
Hi,
when starting my application i want to read some values from the web.xml an store them with application scope.
my question is, what would be suitable to use? i need a store which doesn't need a ui-session because i want to
call it when starting the app, would using the PluginPreferenceStore be a proper way to do that?
moreover i'd like to ask, whether the Activator start() method is a common way to 'initialize' the plugin with
values from the web.xml? the values don't have to be stored persistent, restarting the app will cause a reload,
that's a wanted behaviour.
thx in common.
greetings,
ben
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| Re: Store Initial Parameters from web.xml [message #118299 is a reply to message #117589] |
Mon, 12 January 2009 13:29  |
 Rüdiger Herrmann
Messages: 581
Registered: July 2009 |
Senior Member |
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Ben W. wrote:
> Hi,
>
>
> when starting my application i want to read some values from the web.xml
> an store them with application scope.
Just out of curiosity, how do you *read* values from the web.xml?
From what I know, the web.xml is not intended to be read.
> my question is, what would be suitable to use? i need a store which
> doesn't need a ui-session because i want to
> call it when starting the app, would using the PluginPreferenceStore be
> a proper way to do that?
Use a pref store only if the values should be persisted.
> moreover i'd like to ask, whether the Activator start() method is a
> common way to 'initialize' the plugin with
> values from the web.xml? the values don't have to be stored persistent,
> restarting the app will cause a reload,
> that's a wanted behaviour.
Activator#start() is a good place to do application-wide initialization.
>
> thx in common.
>
> greetings,
> ben
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| Re: Store Initial Parameters from web.xml [message #118317 is a reply to message #118299] |
Mon, 12 January 2009 15:02 |
| Eclipse User |
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Originally posted by: benjamin.wolff.web.de
Hi Rüdiger,
with reading the web.xml i mean extracting some parameters. i contribute some environment variables, e.g. to make the connection to the database.
i couldn't manage to use a JNDI DataSource so far with RAP so i still connect manually with the DriverManager#getConnection().
now i'm using the Activator#getPluginPreferences() to store non-ui relevant application wide values and for the workbench (session) scope i use
Activator#getPreferenceStore(). actually i'm using utility classes which provide static getter and setter for the values, but the underlying containers
are those mentioned above. works quit well for now.
by the way, if there are any tutorials or howtos about using a JNDI DataSource with RAP (to be more specific: using the servletbridge) i'd be grateful for
some pointers. i'd like to define the DataSource completely in the web.xml, without touching the context.xml oder server.xml of the underlying servlet container.
i couldn't figure out how to do this until now, nevertheless i'm already using the BridgeServlet classloader "hack" to access the web.xml.
greetings,
ben
Rüdiger Herrmann schrieb:
> Ben W. wrote:
>> Hi,
>>
>>
>> when starting my application i want to read some values from the
>> web.xml an store them with application scope.
> Just out of curiosity, how do you *read* values from the web.xml? From
> what I know, the web.xml is not intended to be read.
>
>> my question is, what would be suitable to use? i need a store which
>> doesn't need a ui-session because i want to
>> call it when starting the app, would using the PluginPreferenceStore
>> be a proper way to do that?
> Use a pref store only if the values should be persisted.
>
>> moreover i'd like to ask, whether the Activator start() method is a
>> common way to 'initialize' the plugin with
>> values from the web.xml? the values don't have to be stored
>> persistent, restarting the app will cause a reload,
>> that's a wanted behaviour.
> Activator#start() is a good place to do application-wide initialization.
>
>>
>> thx in common.
>>
>> greetings,
>> ben
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| Re: Store Initial Parameters from web.xml [message #118335 is a reply to message #118317] |
Mon, 12 January 2009 15:36 |
Rüdiger Herrmann
Messages: 581
Registered: July 2009 |
Senior Member |
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|
Ben W. wrote:
> Hi Rüdiger,
>
>
> with reading the web.xml i mean extracting some parameters. i contribute
> some environment variables, e.g. to make the connection to the database.
> i couldn't manage to use a JNDI DataSource so far with RAP so i still
> connect manually with the DriverManager#getConnection().
>
> now i'm using the Activator#getPluginPreferences() to store non-ui
> relevant application wide values and for the workbench (session) scope i
> use
> Activator#getPreferenceStore(). actually i'm using utility classes which
> provide static getter and setter for the values, but the underlying
> containers
> are those mentioned above. works quit well for now.
>
>
> by the way, if there are any tutorials or howtos about using a JNDI
> DataSource with RAP (to be more specific: using the servletbridge) i'd
> be grateful for
> some pointers. i'd like to define the DataSource completely in the
> web.xml, without touching the context.xml oder server.xml of the
> underlying servlet container.
> i couldn't figure out how to do this until now, nevertheless i'm already
> using the BridgeServlet classloader "hack" to access the web.xml.
I am not aware of such a tutorial...
>
>
> greetings,
> ben
>
>
>
>
>
> Rüdiger Herrmann schrieb:
>> Ben W. wrote:
>>> Hi,
>>>
>>>
>>> when starting my application i want to read some values from the
>>> web.xml an store them with application scope.
>> Just out of curiosity, how do you *read* values from the web.xml? From
>> what I know, the web.xml is not intended to be read.
>>
>>> my question is, what would be suitable to use? i need a store which
>>> doesn't need a ui-session because i want to
>>> call it when starting the app, would using the PluginPreferenceStore
>>> be a proper way to do that?
>> Use a pref store only if the values should be persisted.
>>
>>> moreover i'd like to ask, whether the Activator start() method is a
>>> common way to 'initialize' the plugin with
>>> values from the web.xml? the values don't have to be stored
>>> persistent, restarting the app will cause a reload,
>>> that's a wanted behaviour.
>> Activator#start() is a good place to do application-wide initialization.
>>
>>>
>>> thx in common.
>>>
>>> greetings,
>>> ben
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