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Date: Mon, 10 Oct 2011 22:15:09 +0800
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 <CALS1ypDrfxY0GaQv0TtxDs8sZCU-mVbDAtQPdoGofjuDAN6Kyw@mail.gmail.com>
Subject: Re: GERONIMO-6185: SchemaFactory.newInstance() fails on IBM JDK
From: Ivan <xhhsld@gmail.com>
To: dev@geronimo.apache.org
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I read those comments on this JIRA, seems we have many solutions, I listed
them all, so that we could compare them clearly. Personally, I like the
option b and e.
a. Use the equonix specific compatible bootdelegation
    For this, I am not sure whether Equonix provides a filter option, so it
only will try those classes from system classloader as the last try. While I
guess that, in most scenario, this will not bring any issue. The only
problem, I think is that whether we would support other OSGi framework, and
actually, we ship Felix.

b. Use JVM specific bootdelegation properties
    I think that this option is fine, and I saw that we have already added
some com.ibm.... packages in the bootdelgation configuration.

c. Replicate SchemaFactory
    I am not sure I understand this correctly, if it means to create same
name classes with OSGi searching algorithm, so do we need to fork all those
classes ?

d. Set the context classloader with null.
    This may require the users to update their codes, guess that it is not a
good idea.

e. Create a wrapper SchemaFactory implementation
    Geronimo could provide a wrapper implementation for the SchemaFactory,
and we could do any hack in the class, it is also require to configure a
global system property and export that class in the
org.osgi.framework.system.packages.extra property.


2011/10/8 Jarek Gawor <jgawor@gmail.com>

> Hi all,
>
> Just looking for opinions on GERONIMO-6185 and what we can do about
> it. For example, should we have JVM specific bootdelegation
> properties? Or should we find some way to replicate SchemaFactory
> class with our own that has some fall back mechanism? Other ideas?
>
> Thanks,
>
> Jarek
>


-- 
Ivan

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I read those comments on this JIRA, seems we have many solutions, I listed =
them all, so that we could compare them clearly. Personally, I like the opt=
ion b and e.<br>a. Use the equonix specific compatible bootdelegation<br>
=A0=A0=A0 For this, I am not sure whether Equonix provides a filter option,=
 so it only will try those classes from system classloader as the last try.=
 While I guess that, in most scenario, this will not bring any issue. The o=
nly problem, I think is that whether we would support other OSGi framework,=
 and actually, we ship Felix.<br>
<br>b. Use JVM specific bootdelegation properties<br>=A0=A0=A0 I think that=
 this option is fine, and I saw that we have already added some com.ibm....=
 packages in the bootdelgation configuration. <br><br>c. Replicate SchemaFa=
ctory<br>
=A0=A0=A0 I am not sure I understand this correctly, if it means to create =
same name classes with OSGi searching algorithm, so do we need to fork all =
those classes ?<br><br>d. Set the context classloader with null.<br>=A0=A0=
=A0 This may require the users to update their codes, guess that it is not =
a good idea.<br>
=A0 =A0=A0 =A0=A0=A0 <br>e. Create a wrapper SchemaFactory implementation<b=
r>=A0 =A0 Geronimo could provide a wrapper implementation for the SchemaFac=
tory, and we could do any hack in the class, it is also require to configur=
e a global system property and export that class in the org.osgi.framework.=
system.packages.extra property.<br>
<br><br><div class=3D"gmail_quote">2011/10/8 Jarek Gawor <span dir=3D"ltr">=
&lt;<a href=3D"mailto:jgawor@gmail.com">jgawor@gmail.com</a>&gt;</span><br>=
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex;">
Hi all,<br>
<br>
Just looking for opinions on GERONIMO-6185 and what we can do about<br>
it. For example, should we have JVM specific bootdelegation<br>
properties? Or should we find some way to replicate SchemaFactory<br>
class with our own that has some fall back mechanism? Other ideas?<br>
<br>
Thanks,<br>
<font color=3D"#888888"><br>
Jarek<br>
</font></blockquote></div><br><br clear=3D"all"><br>-- <br>Ivan<br>

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