[Red5] Classloader Issues with Hibernate

Tue Apr 14 15:49:44 PDT 2009

I dont use AOP so I wasnt commenting on its use. I do believe that Dominick
and I are using AOP in the project where the dir list came from, but I didnt
configure it.. he did.
Paul

On Tue, Apr 14, 2009 at 3:45 PM, Tyler Kocheran <rfkrocktk at gmail.com> wrote:

> My AOP project works great using the spring-aop library, but yeah I'm not
> using namespaces but the old way in my markup.
>
> On Tue, Apr 14, 2009 at 1:13 PM, Daniel Rossi <electroteque at gmail.com>wrote:
>
>> SO the recommended system is to not use AOP, and use the old v 1.0 way for
>> transactions ?
>>
>> On 15/04/2009, at 5:24 AM, Mondain wrote:
>>
>> It should, but i would have to test it to find out if it actually works.
>> I've heard that Spring does some funky stuff in their weavers...
>>
>> On Tue, Apr 14, 2009 at 10:31 AM, Tyler Kocheran <rfkrocktk at gmail.com>wrote:
>>
>>> For all Spring-related stuff, does the webapp class-loader automatically
>>> delegate to the global class loader? IE: Should I put all Spring libraries
>>> in the global lib? (Eg: Spring ORM)
>>>
>>> 2009/4/13 Mondain <mondain at gmail.com>
>>>
>>> I had a problem with the primary quartz scheduler recently because it is
>>>> loaded outside of the webapp where I was trying access it. This is why
>>>> changed the codebase to allow schedulers based within a webapp/red5app when
>>>> required. My particular problem was that the scheduler could not load a
>>>> class inside my webapp since it had no idea that my webapp classloader
>>>> existed and since it was loaded by the urlclassloader it only checked itself
>>>> and the appclassloader (main top level parent). This may be the problem with
>>>> your client registry, if you are not creating the registry class within your
>>>> webapp then it will not be able to use your webapp classes properly.
>>>> AppClassLoader <- UrlClassLoader <- WebAppClassLoader (one of these for
>>>> each of your apps)
>>>>
>>>> I know this seems very simple, but trust me when I say it is not..
>>>>
>>>> A lot of the time the problem finding classes will be that a library or
>>>> instance is trying to use Thread.getCurrentContext().getClassLoader() or it
>>>> will just do a Class.forName() without supplying the loader to use (so it
>>>> uses AppClassLoader). If the thread is within the Red5 process it will not
>>>> find your webapp classes, this has caused a lot of problems.. and continues
>>>> to confuse and irritate the #$!% out of me.
>>>>
>>>> Enough rambling..
>>>>
>>>> Paul
>>>>
>>>>
>>>> On Mon, Apr 13, 2009 at 7:42 PM, Daniel Rossi <electroteque at gmail.com>wrote:
>>>>
>>>>>
>>>>> On 14/04/2009, at 12:02 PM, Mondain wrote:
>>>>>
>>>>> How is it broken again?
>>>>>
>>>>>
>>>>> It was all working and I alerted about that and then suddenly I was
>>>>> getting class not found errors again. It is still working for the
>>>>> hibernateTest app but not my other app which does hibernate stuff inside a
>>>>> ClientRegistry thats where the class not found error happens. So i will have
>>>>> to setup tests for that aswell now.
>>>>>
>>>>>
>>>>> Look at my directory list and clearly it works fine. As for your
>>>>> question TK, youve pretty much got it nailed except the last bit where it
>>>>> searches the AppClassLoader which the top-most level and if it doesnt find
>>>>> the class there (-cp xxxx.jar) then you get the exception. Webapp class
>>>>> loaders look down first and then follow standard class loading procedure by
>>>>> looking up the loader list.
>>>>> Paul
>>>>>
>>>>> On Mon, Apr 13, 2009 at 4:29 PM, Daniel Rossi <electroteque at gmail.com>wrote:
>>>>>
>>>>>> No the classloader was fixed, but after a recent update it suddenly
>>>>>> broke again, I will try and create an example app for this, the
>>>>>> hibernateTest works, but when trying to do hibernate stuff inside the
>>>>>> ClientRegistry it somehow breaks and cannot find a class. I had to move all
>>>>>> the jars into the common lib to get around it.
>>>>>>
>>>>>> On 14/04/2009, at 5:55 AM, Mondain wrote:
>>>>>>
>>>>>> Tyler,Here is the directory dump of a project that Dominick and I are
>>>>>> working on.. Both webapps use hibernate + mysql (names and some jars removed
>>>>>> to protect the innocent) and work without fail. Hopefully this will help you
>>>>>> with placement of your jars, also note that the r3509 was our base version
>>>>>> and we are currently running trunk.
>>>>>>
>>>>>> http://pastebin.com/m69b741c3
>>>>>>
>>>>>> Paul
>>>>>>
>>>>>> On Mon, Apr 13, 2009 at 11:46 AM, Tyler Kocheran <rfkrocktk at gmail.com
>>>>>> > wrote:
>>>>>>
>>>>>>> I'm trying to set up a pretty simple Hibernate project for use with
>>>>>>> Red5, using the latest trunk. The project is built with Ant and Ivy, which
>>>>>>> makes it easy to have all of the dependencies resolved. However, the Red5
>>>>>>> class loader seems to still be having some issues with loading classes. The
>>>>>>> reason I believe that the project is not starting is because of all of the
>>>>>>> 'unnecessary' dependencies that Ivy satisfies anyway (eg. commons-logging
>>>>>>> etc.).
>>>>>>>
>>>>>>> On start of my server, the webapp begins to start, but my datasource
>>>>>>> (ComboPooledDataSource, I love c3p0) cannot find my database driver
>>>>>>> (com.mysql.jdbc.Driver) in the classpath. I have tried copying my JAR files
>>>>>>> from the webapp lib to the global lib, but if I do that, the server won't
>>>>>>> start at all. I'm ready to start messing around with the Java ClassLoader
>>>>>>> for Red5, since it seems to be the cause of my problems. How should I dive
>>>>>>> in to fixing that? Any tips, recommendations? I'd love to help lay this bug
>>>>>>> to rest, since it seems to have been present for so long.
>>>>>>>
>>>>>>>  - TK
>>>>>>> (I can also attach my project to the list if that's helpful at all,
>>>>>>> but I'll probably just post it to JIRA)
>>>>>>>
>>>>>>> --
>>>>>>> And do this, knowing the time, that now it is high time to awake out
>>>>>>> of sleep;
>>>>>>> for now our salvation is nearer than when we first believed.
>>>>>>>
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>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> http://gregoire.org/
>>>>>> http://osflash.org/red5
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>>>>>>
>>>>>>
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>>>>>>
>>>>>
>>>>>
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>>>>> http://gregoire.org/
>>>>> http://osflash.org/red5
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>>>>>
>>>>
>>>>
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>>>> http://gregoire.org/
>>>> http://osflash.org/red5
>>>>
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>>>
>>>
>>> --
>>> And do this, knowing the time, that now it is high time to awake out of
>>> sleep;
>>> for now our salvation is nearer than when we first believed.
>>>
>>> _______________________________________________
>>> Red5 mailing list
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>>
>>
>> --
>> http://gregoire.org/
>> http://osflash.org/red5
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>
>
> --
> And do this, knowing the time, that now it is high time to awake out of
> sleep;
> for now our salvation is nearer than when we first believed.
>
> _______________________________________________
> Red5 mailing list
> Red5 at osflash.org
> http://osflash.org/mailman/listinfo/red5_osflash.org
>
>

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