Re: New update: User authentication, DB connection pool functionalities.

["Ilya A. Volynets-Evenbakh" <ilya@total-knowledge.com>]

Use ServletContext::getInitParameter() instead of
ServletConfig::getInitParameter();

sergey@total-knowledge.com wrote:
>>> + */
>>> +
>>> +void UuServlet::init()
>>> +{
>>> +
>>> +   string strDsn =     getServletConfig().getInitParameter("DSN");
>>> +   string strUid =     getServletConfig().getInitParameter("UID");
>>> +   string strPwd =     getServletConfig().getInitParameter("PWD");
>>> +   string strDb =      getServletConfig().getInitParameter("DB");
>>> +   string strNumCon =
>>> getServletConfig().getInitParameter("num_connections");
>>> +   string strTimeout = getServletConfig().getInitParameter("timeout");
>>>
>>>       
>> Do you expect to provide these parameters for _each_ servlet?
>> Do you plan to actually instantiate UuServlet? This is wrong.
>> What you should do is
>> 1. Use App-level parameters (these can be retrieved from ServletContext)
>>     
>
> The problem is with saving those app-level parameters in context.
> I tried to do it this way:
>
> <app name="">
>         <parameter name="UID" value="sergey"/>
> .....
> </app>
>
> but getInitParameter("UID") returns null in UuServlet::init().
> Looks like it can be parsed only if it's under <servlet...> tag.
> If it's not a bug, what's the appropriate syntax for app-level parameters
> which are independent from servlets?
>
>
>   
>> 2. provide virtual uuInit() method, for derived servlets to override
>> 3. call it from UuServlet::init()
>> 4. Derived servlets should not override init(). (Not sure if there is a
>> syntactic
>> way of making sure of that)
>>
>>     
>
>
>   

-- 
Ilya A. Volynets-Evenbakh
Total Knowledge. CTO
http://www.total-knowledge.com