Greg,
On 12/3/25 3:34 AM, Greg Huber wrote:
A while back this thread was posted here and it works great on my local
dev box (using a background thread) using vhost="localhost/". When I
deploy it as a war the vhost name changes.
From the output:
Attributes for object: Catalina:j2eeType=Servlet,WebModule=//localhost/
##914-develop,name=MyServlet,J2EEApplication=none,J2EEServer=none:
How do I reliably get the vhost / WebModule name when using a war?
In ganeral, the WebModule name should be //[host]/[appname][##version]
but you have a special case here with the ROOT context which makes the
web application "name" into an empty-string.
The attribute "org.apache.catalina.webappVersion" gives "914-develop"
but its missing the ##
My war is called: ROOT##914-develop.war
Right. You'll need to see if you have a non-empty "version" and if so,
append not only the version string itself but a ## prefix.
Hope that helps,
-chris
On 16/10/2025 18:02, Christopher Schultz wrote:
I recently added reload capabilities to my application for users with
admin roles. The code is basically (after triple-checking
authentication and some app-specific bells and whistles):
ServletContext app = getServletContext();
MBeanServer mbs = getServer();
if(null != mbs) {
try {
String vhost = getHostname();
ObjectName objectName = new
ObjectName("Catalina:j2eeType=WebModule,name=//" + vhost +
app.getContextPath() + ",J2EEApplication=none,J2EEServer=none");
if(mbs.isRegistered(objectName)) {
mbs.invoke(objectName, "reload", null, null);
}
} catch (MBeanException | MalformedObjectNameException |
InstanceNotFoundException | ReflectionException e) {
app.log(getClass().getSimpleName() + ": Failed to
reload application ", e);
}
}
... with the helper functions:
private String hostname = "localhost"; // This is an init-param
public String getHostname() {
return hostname;
}
private static MBeanServer getServer() {
ArrayList<MBeanServer> mbservers =
MBeanServerFactory.findMBeanServer(null);
if (mbservers.size() > 0) {
MBeanServer mbserver = mbservers.get(0);
if (mbserver != null)
return mbserver;
}
return null;
}
Just wire this into your application somewhere. You don't need to
install anything else, even the Manager application.
-chris
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