Hi,
You can subclass it, should be fine.
Yoav Shapira
Millennium Research Informatics
-----Original Message-----
From: Michael Wille [mailto:[EMAIL PROTECTED]
Sent: Monday, July 26, 2004 2:26 PM
To: [EMAIL PROTECTED]
Subject: Subclassing WebdavServlet
Hello All,
I would like to know if its possible to subclass the webdav servlet
that comes with Tomcat 5.x. We have need of webdav in our
application,
but need to provide a different JNDI InitialContext then the file
system. The thought was we could just override the getResources()
method in WebdavServlet to return our own context.
What follows is a description of what we are doing:
It seems there is at least one obstacle to doing this. We would have
to move/copy the jar files: servlets-default.jar, servlets-common.jar,
and servlets-webdav.jar to the common/lib folder. It seemed when we
attempted to move the files to common/lib, all of the default webapps
couldn't be loaded as well as some of our application servlets. When
we leave the servlets*.jar files in both server/lib and common/lib, an
exception is thrown when accessing our servlet:
javax.servlet.ServletException: Error instantiating servlet class
com.test.webdav.XDav
And this is caused by:
java.lang.NoClassDefFoundError:
org.apache.catalina.servlets.DefaultServlet
This seems strange considering the app should have access to the
servlets-default.jar now that it is in common. Or is there an issue
with libs in both server and common?
Any help is hugely appreciated.
Thanks!
-Mike Wille
Our subclassed servlet (with only test code for the InitialContext):
package com.test.webdav;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.naming.directory.InitialDirContext;
import javax.naming.directory.DirContext;
import org.apache.catalina.servlets.*;
public class XDav extends WebdavServlet {
// need to dup this here because these have
// private access in apaches webdavservlet
protected static final String METHOD_HEAD =
"HEAD";
protected static final String METHOD_PROPFIND = "PROPFIND";
protected static final String METHOD_PROPPATCH = "PROPPATCH";
protected static final String METHOD_MKCOL =
"MKCOL";
protected static final String METHOD_COPY =
"COPY";
protected static final String METHOD_MOVE =
"MOVE";
protected static final String METHOD_LOCK =
"LOCK";
protected static final String METHOD_UNLOCK =
"UNLOCK";
protected Logger logger;
public void init (ServletConfig config) throws ServletException
{
// wake your parents
super.init(config);
}
public void destroy() {
// kill your parents
super.destroy();
}
/**
* Get resources. This method will try to retrieve the resources
through
* JNDI first, then in the servlet context if JNDI has failed
(it
could be
* disabled). It will return null.
*
* @return A JNDI DirContext, or null.
*/
protected DirContext getResources() {
InitialDirContext result = null;
// Try the servlet context
try {
//result = new IntitialLibraryContext();
result.bind("directory 1", "directory 1");
result.bind("directory 2", "directory 2");
result.bind("directory 3", "directory 3");
result.bind("directory 4", "directory 4");
result.bind("directory 3/subdirectory 5",
"subdirectory
5");
} catch(Exception e) {
logger.warning(UtilityTank.getErrorDetail(e));
}
return result;
}
}
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