Hello,
I'm trying to contact a Jini lookup service (reggie) from a simple servlet. I'm using Tomcat 5.5.7, Java 1.5.0_01, Jini 1.2.1 and Solaris8.
The problem is that, after the call to LookupDiscoveryManager() (see source code below), the "discovered()" method is never called back.
Here is what I get in my browser after an exec : ******** before LookupDiscoveryManager end ********
I have successfully run a similar code in a standalone Java app (i.e. without Tomcat / servlet), and everything is OK.
In fact, I have no error message nor Exception thrown. :-( I simply don't have any response from reggie.
Any help would be appreciate, Olive
PS: I'm new to Tomcat and Jini.
===================== == core servlet =====================
protected void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException { response.setContentType("text/plain");
PrintWriter out = response.getWriter(); new searchALookup(out).start();
try {
Thread.sleep(30000);
} catch (InterruptedException ie) {
out.println("InterruptedException: " + ie.getMessage());
}
out.println("end");
out.close();
}====================== == searchALookup.java ======================
import java.io.*; import net.jini.core.discovery.LookupLocator; import net.jini.core.lookup.*; import net.jini.discovery.*;
public class searchALookup extends Thread implements DiscoveryListener { private LookupDiscoveryManager discover;
private PrintWriter sortie; public chercheLookup(PrintWriter out) {
sortie = out;
} public void run() {
try {
startServiceDiscovery();
} catch (IOException ioe) {
sortie.println("Error while connecting to service");
}
} public synchronized void discovered(DiscoveryEvent dev) {
sortie.println("--> Discovered");
ServiceRegistrar[] lookup = dev.getRegistrars();
// We may have discovered one or more lookup services
sortie.println(lookup.length +" lookups decouverts");
} public synchronized void discarded(DiscoveryEvent dev) {
sortie.println("discarded");
} private void startServiceDiscovery()
throws IOException { String[] groups = null;
LookupLocator[] locators = null; try{
LookupLocator locator =
new LookupLocator("jini://REGGIE_HOSTNAME");
locators = new LookupLocator[]{locator};
groups=DiscoveryGroupManagement.NO_GROUPS;
}catch(java.net.MalformedURLException e){
groups = new String[]{"public"};
sortie.println("Groups ="+groups[0]);
}
// Initialize for receiving events from the lookup service
sortie.println("before LookupDiscoveryManager");
discover = new LookupDiscoveryManager(groups, locators, this);
}
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