Examples of net.jini.core.event.EventRegistration

net.jini.core.event.EventRegistration
A utility class for use as a return value for event-interest registration methods. Objects of this class are meant to encapsulate the information needed by a client to identify a notification as a response to a registration request and to maintain that registration request. It is not mandatory for an event-interest registration method to use this class.
A registration of interest in some kind of event that occurs within the scope of a transaction is leased in the same way as other event interest registrations. However, the duration of the registration is the minimum of the length of the lease and the duration of the transaction. Simply put, when the transaction ends (either because of a commit or an abort) the interest registration also ends. This is true even if the lease for the event registration has not expired and no call has been made to cancel the lease. @author Sun Microsystems, Inc. @since 1.0

             new StorableObject[]{tmpl});


      templates.add(reg, tmpl);
  }


  return new EventRegistration(eventID, spaceProxy, 
      leaseFactory.newLease(cookie, reg.getExpiration()),
      0);
    }

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  }


  protected void setupNotify() {
    if(registrar != null) {
      try {
  EventRegistration reg =
      registrar.notify(stmpl,
           ServiceRegistrar.TRANSITION_MATCH_NOMATCH |
           ServiceRegistrar.TRANSITION_NOMATCH_MATCH |
           ServiceRegistrar.TRANSITION_MATCH_MATCH,
           receiver.proxy,
           null,
           Lease.ANY);
  elease = (Lease) browser.leasePreparer.prepareProxy(reg.getLease());
  browser.leaseMgr.renewUntil(elease, Lease.ANY,
            new Browser.LeaseNotify());
  eventID = reg.getID();
  seqNo = reg.getSequenceNumber();
      } catch (Throwable t) {
  logger.log(Level.INFO, "event registration failed", t);
      }
    }
  }

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      for (int i=0; i<tmpls.length; i++) {
    templates.add(reg, tmpls[i]);
      }
  }


  return new EventRegistration(eventID, spaceProxy, 
      leaseFactory.newLease(cookie, reg.getExpiration()),
      0);
    }

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                    ServiceTemplate tmpl,
                    RemoteEventListener listenerProxy,
                    long duration)  throws RemoteException
    {
        /* Register with the event mechanism of the given lookup service */
        EventRegistration e = null;
        int transition = (   ServiceRegistrar.TRANSITION_NOMATCH_MATCH
                           | ServiceRegistrar.TRANSITION_MATCH_NOMATCH
                           | ServiceRegistrar.TRANSITION_MATCH_MATCH   );
        e = proxy.notify(tmpl, transition, listenerProxy, null, duration);
        /* Proxy preparation -
         * 
         * Prepare the proxy to the lease on the event registration just
         * returned. Because lease management (renewal and cancellation)
         * involves remote calls, lease proxies should be prepared before
         * management of the associated leases begins. This allows one to
         * verify trust in the lease, and ensures that the appropriate
         * constraints are attached to the lease.
         */
        Lease eventLease = e.getLease();
        eventLease = (Lease)eventLeasePreparer.prepareProxy(eventLease);
        logger.log(Level.FINEST, "ServiceDiscoveryManager - proxy to event "
                   +"registration lease prepared: {0}", eventLease);
        /* Management the lease on the event registration */
        leaseRenewalMgr.renewFor(eventLease,
                                 duration,
                                 new LeaseListenerImpl(proxy));
        /* Wrap source, id, event sequence & lease in EventReg, and return. */
        return ( new EventReg(e.getSource(),
                              e.getID(),
                              e.getSequenceNumber(),
                              eventLease) );
    }//end registerListener

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  throws RemoteException
    {  
  concurrentObj.writeLock();
  try {
      ready.check();
      EventRegistration reg = notifyDo(
    tmpl, transitions, listener, handback, leaseDuration);
      if (logger.isLoggable(Level.FINE)) {
    logger.log(
        Level.FINE,
        "registered event listener {0} as {1}",
        new Object[]{
      listener,
      ((ReferentUuid) reg.getLease()).getReferentUuid()
        });
      }
      return reg;
  } finally {
      concurrentObj.writeUnlock();

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  /* see if the expire thread needs to wake up earlier */
  if (reg.leaseExpiration < minEventExpiration) {
      minEventExpiration = reg.leaseExpiration;
      concurrentObj.waiterNotify(eventNotifier);
  }
  return new EventRegistration(
      reg.eventID,
      proxy,
      EventLease.getInstance(
    myRef,
    myServiceID,

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      elease = null;
  }
  if (lookup == null)
      return;
  try {
      EventRegistration reg =
    lookup.notify(tmpl,
            ServiceRegistrar.TRANSITION_MATCH_NOMATCH |
            ServiceRegistrar.TRANSITION_NOMATCH_MATCH |
            ServiceRegistrar.TRANSITION_MATCH_MATCH,
            listen.proxy, null, Lease.ANY);
      elease = (Lease) leasePreparer.prepareProxy(reg.getLease());
      leaseMgr.renewUntil(elease, Lease.ANY, lnotify);
      eventID = reg.getID();
      seqNo = reg.getSequenceNumber();
  } catch (Throwable t) {
      failure(t);
  }
    }

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  set = prepareSet(set);
  logger.log(Level.FINE, "Created Set with lease duration of " +
        "Lease.FOREVER.");


  // register listener to receive events
  EventRegistration evReg = set.setRenewalFailureListener(rrl, null);
  evReg = prepareRegistration(evReg);


  // check event registration (not formally part of this test)
  if (rstUtil.isValidRenewFailEventReg(evReg, set) == false) {
      String message = "Registration is invalid because:\n" +

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  // create a handback object
  MarshalledObject handback = new MarshalledObject(new Integer(99));


  // register listener to receive events
  EventRegistration evReg = 
      set.setExpirationWarningListener(rrl, minWarning, handback);
  evReg = prepareRegistration(evReg);


  if (rstUtil.isValidExpWarnEventReg(evReg, set) == false) {
      String message = "Event Registration is invalid.";

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  // create a handback object
  MarshalledObject handback = new MarshalledObject(new Integer(99));


  // register listener to receive events
  EventRegistration evReg = 
      set.setRenewalFailureListener(rrl, handback);
  evReg = prepareRegistration(evReg);


  // create a lease that will fail to renew
  logger.log(Level.FINE, "Creating the lease to be managed.");

View Full Code Here

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