Hi Mark,
Actually, I am declaring a Loader in tomcat\conf\context.xml file as
--------------------------------------------------------------------------------------------------------------------
<Loader
className="com.teradata.viewpoint.portal.container.loader.SharedClasspathWebappLoader"
/>
in its startInternal() method, we are creating SharedClassLoader as like
this.
Field field = WebappLoader.class.getDeclaredField("parentClassLoader");
field.setAccessible(true);
field.set(this, SharedClassLoader.getInstance());
The SharedClassLoader returns its instance, through this code.
sharedClassLoader = new
SharedClassLoader(WebappLoader.class.getClassLoader());
Its constructor is like this
public SharedClassLoader(ClassLoader parent) throws Exception
{
super(parent);
this.parentClassLoader = parent;
for (URL url : parseClassPath(SHARED_LOCATION))
{
addURL(url);
}
start();
}
for Tomcat 7.0.68, It was working fine.
-----------------------------------------------------------------------------------------------------------------------
After upgrade to tomcat 9.0.17.
The start method of SharedClassLoader.java is expecting resources variable
needs to be populated.
How can I pass the Resources to above SharedClassLoader?
Any idea?
Regards,
Akram.
On Fri, Apr 19, 2019 at 4:09 AM Mark Thomas <ma...@apache.org> wrote:
> On 16/04/2019 20:32, Christopher Schultz wrote:
> > Akram,
> >
> > On 4/16/19 12:41, Akram Hussain wrote:
> >> I have gone through it, But it was not clear to me.
> >
> >> If an example is provided, how to pass resources to
> >> SharedClassLoader, it could be helpful.
> >
> > If you configure something like this in your META-INF/context.xml:
> >
> > <Resources>
> > <PostResources webAppMount="/WEB-INF/classes"
> > base="/path/to/your/shared/libraries"
> > className="org.apache.catalina.webresources.DirResourceSet" />
> > </Resources>
> >
> > That should allow your application to load JAR files from your
> > /path/to/your/shared/libraries directory.
>
> The OP is trying to load JARs so the /path/to/your/shared/libraries
> directory needs to be mounted at WEB-INF/lib, not WEB-INF/classes.
>
> We (OK I since I wrote this stuff) should probably have better
> documented which implementation to pick.
>
> You pick the implementation based on where the files you want to insert
> are located.
>
> If you want to insert a single file, use FileResourceSet
> If you want to insert a directory tree, use DirResourceSet
> If you want to insert files from inside an archive (JAR) then use a
> JarResourceSet.
>
> Note: Using a JarResourceSet effectively unpacks the archive as far as
> Tomcat is concerned so Tomcat sees directories and files, not a single
> JAR file.
>
> In this case you have a directory of JAR files so you want a
> DirResourceSet.
>
> Assuming you want those JAR files to be treated as if they were placed
> in WEB-INF/lib then you want:
>
> <Resources>
> <PostResources
> webAppMount="/WEB-INF/lib"
> base="/path/to/your/shared/libraries"
> className="org.apache.catalina.webresources.DirResourceSet"
> />
> </Resources>
>
> That has the same effect as copying the entire contents of
> /path/to/your/shared/libraries to WEB-INF/lib.
>
> If you want this to apply to every web application you deploy then add
> the above to global context.xml in CATALINA_BASE/conf/context.xml
>
> Mark
>
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