Re: jdbc works in java app, fails in servlet: "no suitable jdbc found"

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От Craig Ringer
Тема Re: jdbc works in java app, fails in servlet: "no suitable jdbc found"
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Msg-id 4C074A53.9020004@postnewspapers.com.au
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Ответ на Re: jdbc works in java app, fails in servlet: "no suitable jdbc found"  (Lew <noone@lewscanon.com>)
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On 3/06/2010 6:58 AM, Lew wrote:


>> You can use the classloader that loaded the currently running object
>> with:
>>
>> this.getClass().getClassLoader().loadClass('org.postgresql.Driver');
>
> The driver should be loaded in a static context, not an instance
> context. Furthermore, that code as shown will not compile.

Oops, wrong quotes. Point.

> Further
> furthermore, I see nothing in the documentation for
> 'ClassLoader#loadClass()' that promises to initialize the class, unlike
> 'Class.forName()'. If the class is not initialized, the driver won't
> register with the 'DriverManager'. I think you're selling a pig in a
> poke here.

Fair call - the beahaviour would depend on the classloader, and probably
shouldn't be assumed.

> Go with the Tomcat way and forget the kludgey direct uses of Java
> reflection.

The fact that I haven't done much in servelet environments kinda shows,
I suspect. JNDI is certainly the way to go based on what you referred to.

--
Craig Ringer

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