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Date: Mon, 11 Sep 2006 19:05:30 +0200
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From: Frank Knoll <Knoll_Frank@web.de>
To: axis-dev@ws.apache.org, axis-user@ws.apache.org
Subject: how can two WebServices share the same data?
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Dear Axis-Users and -Developers,

I have installed Axis 1.4 over Tomcat 5.5.17 over Java 1.5 and have one qu=
estion and one problem:
My question is: I have two WebServices deployed in the same container whic=
h want to share the same data (e.g. one instance of my class FileResourceH=
ome). I figured out that this data can be stored in a property (e.g. "Text=
Grid.FileResourceHome") of the ServletContext which I can access out of an=
y WebService deployed in the same container, right or wrong=3F
Here is is the code I am using so far for this scenario:

import org.apache.axis.MessageContext;
import org.apache.axis.transport.http.HTTPConstants;
import javax.servlet.http.HttpServlet;
import javax.servlet.ServletContext;
...
private static final String fileResourceHomeName =3D "TextGrid.FileResourceH=
ome";
public static FileResourceHome getInstance()
{
  MessageContext messageContext =3D MessageContext.getCurrentContext();
  HttpServlet httpServlet =3D (HttpServlet)messageContext.getProperty(HTTPCo=
nstants.MC=5FHTTP=5FSERVLET);
  ServletContext servletContext =3D httpServlet.getServletContext();

  FileResourceHome fileResourceHome =3D (FileResourceHome)servletContext.get=
Attribute(fileResourceHomeName);
  if(fileResourceHome =3D=3D null)
  {
    fileResourceHome =3D new FileResourceHome();
    servletContext.setAttribute(fileResourceHomeName, fileResourceHome);
  }
=09
  return fileResourceHome;
}

My problem is: This code does compile, but doesn't execute, because the li=
ne
MessageContext messageContext =3D MessageContext.getCurrentContext();
from above results in a java.lang.reflect.InvocationTargetException. I don=
't understand this, because the class MessageContext is in the file axis.j=
ar which is stored in the webapps/axis/WEB-INF/lib directory of my tomcat-=
installation.

What did I do wrong=3F Can someone help me, please=3F

Cheers
Frank

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