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From Daniel Fagerstrom <>
Subject Re: Shielded class loading between blocks
Date Mon, 20 Nov 2006 12:59:44 GMT
Carsten Ziegeler skrev:
> Alexander Klimetschek wrote:
>> The optimal solution would be the OSGi support (!?), but this is too 
>> much work and won't be part of cocoon 2.2. My patch is a lot simpler, 
>> just fixing the BootstrapClassLoaderManager and the blocks-fw (where I 
>> just implemented the not-yet implemented methods of those servlet 
>> interfaces). Then it is just a simple configuration of the block servlet 
>> using the ShieldingServlet. Here is the xml snippet, the full config can 
>> be found in the jira issue:
>> So can this made be simpler? Having standard paths in the block 
>> directory for the shielded libs and some config option to enable 
>> shielding, which could be integrated directly in the BlockServlet?
> Hmm, yes, what about directly adding the support to the BlockServlet
> (where imho it belongs):
> <bean id="my-block" class="org.apache.cocoon.blocks.BlockServlet">
>     <property name="mountPath" value="/my-block" />
>     <property name="blockContextURL"
>       value="blockcontext:/mindquarry-solr-block/" />
>     <property name="properties">
>       <map>
>         <entry key="classpath-file"
>           value="/paranoid-classpath.txt" />
>         <entry key="classloader-debug" value="true" />
>         <entry key="classloader-factory"
>         value="org.apache.cocoon.classloader.DefaultClassLoaderFactory"
>       </map>
>     </property>
>  </bean>
> And yes, I think this should support some default paths, like
> {blockdir}/config/libs and {blockdir}/config/classes.
Seem like a good solution to me. I would prefer putting this 
functionality in a ShieldingBlockServlet that extends the BlockServlet 
though. If we put to much extras in the BlockServlet it will be hard for 
people to understand what it does and to contribute to make it stable.


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