Examples of net.jini.lease.LeaseRenewalSet

net.jini.lease.LeaseRenewalSet
A collection of leases being managed by a lease renewal service.
Clients of the renewal service organize the leases they wish to have renewed into lease renewal sets (or sets, for short). These sets are represented by objects implementing this interface. The LeaseRenewalService.createLeaseRenewalSet method is provided to create sets. Sets are populated by methods on the sets themselves. Two leases in the same set need not be granted by the same service or have the same expiration time; in addition, they can be added or removed from the set independently.
This interface is not a remote interface; each implementation of the renewal service exports proxy objects that implement the LeaseRenewalSet interface that use an implementation-specific protocol to communicate with the actual remote server. All of the proxy methods obey normal RMI remote interface semantics except where explicitly noted. Two proxy objects are equal if they are proxies for the same set created by the same renewal service. Every method invocation (on both a LeaseRenewalService and all the LeaseRenewalSet instances created by that server) is atomic with respect to other invocations.
A number of the methods in this class throw RemoteException, each of these may throw the java.rmi.NoSuchObjectException subclass. If a client receives a NoSuchObjectException when calling a method on a renewal set, the client can infer that the set has been destroyed; however, it should not infer that the renewal service has been destroyed.
The term client lease is used to refer to a lease that has been placed into a renewal set. Client leases are distinct from the leases that the renewal service grants on renewal sets it has created.
Each client lease has two expiration related times associated with it: the desired expiration time for the lease, and the actual expiration time granted when the lease was created or last renewed. The desired expiration represents when the client would like the lease to expire. The actual expiration represents when the lease is going to expire if it is not renewed. Both time values are absolute times, not relative time durations. When a client lease's desired expiration arrives, the lease will be removed from the set without further client intervention.
Each client lease also has two other associated attributes: a desired renewal duration and a remaining desired duration. The desired renewal duration is specified by the client (directly or indirectly) when the lease is added to the set. This duration must normally be a positive number, however, it may be Lease.ANY if the lease's desired expiration is Lease.FOREVER. The remaining desired duration is always the desired expiration less the current time.
Each time a client lease is renewed, the renewal service will ask for an extension equal to the lease's renewal duration if the renewal duration is:
- Lease.ANY, or
- less than the remaining desired duration,
otherwise, it will ask for an extension equal to the lease's remaining desired duration.
If a client lease's actual expiration is later than its desired expiration, the renewal service will not renew the lease; the lease will remain in the set until its desired expiration is reached, the set is destroyed, or it is removed by the client.
Each set is leased from the renewal service. If the lease on a set expires or is cancelled, the renewal service will destroy the set and take no further action with regard to the client leases in the set. Each lease renewal set has associated with it an expiration warning event that occurs at a client-specified time before the lease on the set expires. Clients can register for warning events using methods provided by the set. A registration for warning events does not have its own lease, but instead is covered by the same lease under which the set was granted.
The term definite exception is used to refer to an exception that could be thrown by an operation on a client lease (such as a remote method call) that would be indicative of a permanent failure of the client lease. For purposes of this document, all bad object exceptions, bad invocation exceptions, and LeaseExceptions are considered to be definite exceptions.
Each lease renewal set has associated with it a renewal failure event that will occur in either of two cases: if any client lease in the set reaches its actual expiration before its desired expiration is reached, or if the renewal service attempts to renew a client lease and gets a definite exception. Clients can register for failure events using methods provided by the set. A registration for failure event does not have its own lease, but instead is covered by the same lease under which the set was granted.
Once placed in a set, a client lease will stay there until one or more of the following occurs:
- The lease on the set itself expires or is cancelled, causing destruction of the set
- The client lease is removed by the client
- The client lease's actual or desired expiration is reached
- A renewal attempt on the client lease results in a definite exception
Each client lease in a set will be renewed as long as it is in the set. If a renewal call throws an indefinite exception, the renewal service should retry the lease renewal until the lease would otherwise be removed from the set. The renewal service will never cancel a client lease. The preferred method of cancelling a client lease is for the client to first remove the lease from the set and then call cancel on it. It is also permissible for the client to cancel the lease without first removing the lease from the set, although this is likely to result in additional network traffic.
Client leases get returned to clients in a number of ways (via remove and getLeases calls, as components of events, etc.). In general, they should have their serial format set to Lease.DURATION before being transferred to the client's virtual machine. In some exceptional circumstances, this may not be possible (for example, the client lease was recovered from persistent storage and could not be deserialized in the server's virtual machine). In these cases, it is acceptable to transfer the lease to the client using the Lease.ABSOLUTE serial format.
Whenever a client lease gets returned to a client, its actual expiration should reflect either:
- The result of the last successful renewal call that the renewal service made or
- The expiration time the lease originally had when it was added to the set, if the renewal service has not yet successfully renewed the lease
@author Sun Microsystems, Inc. @see LeaseRenewalService


  // create a lease renewal set that hangs around a long time
  logger.log(Level.FINE, "Creating Set with lease duration of " +
        "Lease.FOREVER.");
  long renewSetDur = Lease.FOREVER;
  LeaseRenewalSet set = lrs.createLeaseRenewalSet(renewSetDur);
  set = prepareSet(set);


  // register the listener to receive renewal failure events
  logger.log(Level.FINE, "Registering listener to receive " +
        "RenewalFailureEvents.");
  set.setRenewalFailureListener(normalListener, null);


  // create a lease that will fail during renewal attempts
  logger.log(Level.FINE, "Creating lease with duration of " +
        renewGrant + " milliseconds.");
  TestLease lease = 
      leaseProvider.createNewLease(failingOwner, 
           rstUtil.durToExp(renewGrant));
  
  // add the lease to the renewal set w/ membership of renewGrant
  logger.log(Level.FINE, "Adding lease to renewal set.");
  long membership = renewGrant;
  logger.log(Level.FINE, "membership = " + membership + " milliseconds.");
  set.renewFor(lease, membership);


  // wait for the failure to roll in ...
  rstUtil.waitForRemoteEvents(normalListener, 1, renewGrant * 2);


  // capture the event

View Full Code Here


  // get a lease renewal set w/ duration for as long as we can
  logger.log(Level.FINE, "Creating the lease renewal set with duration" +
        " of Lease.FOREVER");
  LeaseRenewalService lrs = getLRS();
  LeaseRenewalSet set = lrs.createLeaseRenewalSet(Lease.FOREVER);
  set = prepareSet(set);
  lrm.renewFor(prepareLease(set.getRenewalSetLease()), Lease.FOREVER, null);


  // register listener to receive events
  logger.log(Level.FINE, "Registering listener for renewal failure" +
        " events.");
  set.setRenewalFailureListener(rrl  , null);


  // create the lease to be managed
  logger.log(Level.FINE, "Creating lease with duration of " +
        renewGrant + " milliseconds.");
  Lease testLease = 
      leaseProvider.createNewLease(owner, 
           rstUtil.durToExp(renewGrant));


  // wait for the lease to expire
  rstUtil.waitForLeaseExpiration(testLease,
               "for client lease to expire.");


  /* this should trigger an immediate renewal failure event.
     (implementation dependent? I think so.) */
  set.renewFor(testLease, Lease.FOREVER);


  // wait for an event to arrive
  rstUtil.waitForRemoteEvents(rrl, 1, 30000L);


  // assert we received exactly one event

View Full Code Here

  // grab the ever popular LRS
  LeaseRenewalService lrs = getLRS();


  // create a renewal set
  long renewSetDur = Lease.FOREVER;
  LeaseRenewalSet set = lrs.createLeaseRenewalSet(renewSetDur);
  set = prepareSet(set);
  logger.log(Level.FINE, "Created renewal set with lease duration of " +
        "Lease.FOREVER.");


  // create a test lease to be managed
  logger.log(Level.FINE, "Creating the lease to be managed.");
  logger.log(Level.FINE, "Duration == Lease.FOREVER");
  TestLease testLease = 
      leaseProvider.createNewLease(leaseOwner, Lease.FOREVER);


  // start managing the lease for the base membership time
  logger.log(Level.FINE, "Adding lease with membership of " +
        membershipDuration + " milliseconds");
  set.renewFor(testLease, membershipDuration);


  // wait for 1/2 the membership time
  long sleepTime = membershipDuration / 2;
  rstUtil.sleepAndTell(sleepTime, "1/2 lease membership duration.");


  // now add the lease again doubling the membership duration
  long doubleDuration = membershipDuration * 2;
  logger.log(Level.FINE, "Adding lease with membership of " +
        doubleDuration + " milliseconds");
  set.renewFor(testLease, doubleDuration);


  // sleep for 3/4 of the doubled membershipDuration
  sleepTime = doubleDuration * 3 / 4;
  rstUtil.sleepAndTell(sleepTime, "3/4 lease membership duration.");


  /* if the membership duration was honored we should be able
     to remove the lease */
  Lease managedLease = set.remove(testLease);
  if (managedLease == null) { // new membership was not honored
      String message = "The membership duration was apparently ";
      message += "not updated to the longer value\n";
      message += "when the lease was re-added to the set.";
      throw new TestException(message);
  }


  /* now assert that a shorter time will also be honored.
     start managing the lease for the base membership time
     again */
  logger.log(Level.FINE, "Adding lease with membership of " +
        doubleDuration + " milliseconds");
  set.renewFor(testLease, doubleDuration);
  logger.log(Level.FINE, "Re-adding lease with membership of " +
        membershipDuration + " milliseconds");
  set.renewFor(testLease, membershipDuration);
  
  // sleep 1.5 times the membership to ensure expiration
  sleepTime = membershipDuration + (membershipDuration / 2);
  rstUtil.sleepAndTell(sleepTime, "1.5 X membership duration.");


  /* if the membership duration was honored we should NOT be able
     to remove the lease because its membership has expired */
  managedLease = set.remove(testLease);
  if (managedLease != null) { // new membership was not honored
      String message = "The membership duration was apparently\n";
      message += "updated to a value that was longer than\n";
      message += "the base membership duration when the lease\n";
      message += "was re-added to the set.";

View Full Code Here

  LeaseRenewalService lrs = getLRS();


  // create a renewal set for the requested duration
  logger.log(Level.FINE, "Creating renewal set w/ duration = " +
        renewSetDur + " milliseconds.");
  LeaseRenewalSet set = lrs.createLeaseRenewalSet(renewSetDur);
  set = prepareSet(set);


  // register listener #1 to receive events
  logger.log(Level.FINE, "Registering listener for warning events.");
  logger.log(Level.FINE, "minWarning = " + minWarning + ".");
  set.setExpirationWarningListener(rrl, minWarning, null);


  // sleep the length of the lease duration
  rstUtil.waitForLeaseExpiration(prepareLease(set.getRenewalSetLease()), 
               "for renewal set to be renewed.");
  
  /* by now it should have been renewed exactly once.
     clear the listener multiple times to ensure no ill effect. */
  try {
      for (int i = 0; i < 10; ++i) {
    set.clearExpirationWarningListener();
      }
  } catch (Exception ex) {
      String message = "Multiple calls to " +
    "clearExpirationWarningListener raises an exception.";
      throw new TestException(message, ex);
  }


  RemoteEvent[] events = rrl.getEvents();
  if (events.length < 1) {
      String message = "Listener did not receive any events.\n" +
    "Should have received exactly one.";
      throw new TestException(message);
  } else if (events.length > 1) {
      String message = "Listener received " + events.length +
    "events.\n" + "Should have received exactly one.";
      throw new TestException(message);
  }


  // There is only one event received, now allow lease to expire
  Lease setLease = rrl.getLastLeaseRenewed();
  rstUtil.waitForLeaseExpiration(setLease,
               "for renewal set to expire.");
  
  // lease should now be expired, prove it ...
  try {
      set.setExpirationWarningListener(rrl, minWarning, null);
      String message = "The set's lease did not expire as expected.";
      throw new TestException(message);
      // we should not get to this place
  } catch (NoSuchObjectException ex) {
      // we are golden if we get to here so just keep on trucking ...

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  LeaseRenewalService lrs = getLRS();


  // capture times for roundTrip calculations
        // expand round-trip time to tolerate gc-delays, etc.
  long time01 = System.currentTimeMillis();
  LeaseRenewalSet set = lrs.createLeaseRenewalSet(renewSetDur);
  set = prepareSet(set);
  long time02 = System.currentTimeMillis();
  long roundTrip = (time02 - time01) * 10;
  warnLease = prepareLease(set.getRenewalSetLease());
  long warnLeaseExpiration = warnLease.getExpiration();
  
  // create the lease to be managed
  logger.log(Level.FINE, "Creating lease with duration of " +
        renewGrant + " milliseconds.");
  failLease = 
      leaseProvider.createNewLease(owner, 
           rstUtil.durToExp(renewGrant));
  long failLeaseLocalExpiration = failLease.getExpiration();
  set.renewFor(failLease, Lease.FOREVER);
  long nextFailExpiration = failLeaseLocalExpiration + renewGrant;


  // register listener to receive expiration warning events
  long minWarning = renewSetDur / 2;
  logger.log(Level.FINE, "Registering listener for expiration" +
        " warning events.");
  logger.log(Level.FINE, "minWarning = " + minWarning + " milliseconds.");
  set.setExpirationWarningListener(warnListener, minWarning, null);


  // register listener to receive renewal failure events
  logger.log(Level.FINE, "Registering listener for renewal" +
        " failure events.");
  set.setRenewalFailureListener(failListener, null);


  /* wait for the events to get arrive. We do this by creating
     two threads that wait for the events to arrive and then
     join with both. */
  Thread warnWaitThread = 
      rstUtil.createRemoteEventWaitThread(warnListener, 1);
  Thread failWaitThread = 
      rstUtil.createRemoteEventWaitThread(failListener, 1);


  long maxWaitTime = Math.max(renewSetDur, renewGrant);


  // wait for expiration warning event
  warnWaitThread.join(maxWaitTime);


  if (warnWaitThread.isAlive() == true) {
      String message = "ExpirationWarningEvent was never received.";
      throw new TestException(message);
  }
  
  // capture the expiration time of the warning event
  ExpirationWarningEvent warnEvent = 
      (ExpirationWarningEvent) warnListener.getEvents()[0];
  long warnEventExpiration = 
      prepareLease(warnEvent.getRenewalSetLease()).getExpiration();


  // wait for renewal failure event
  failWaitThread.join(maxWaitTime);


  // if the thread is still alive then the event was never received.
  if (failWaitThread.isAlive() == true) {
      String message = "RenewalFailureEvent was never received.";
      throw new TestException(message);
  }


  // capture the expiration time of the renewal failure event
  RenewalFailureEvent failEvent = 
      (RenewalFailureEvent) failListener.getEvents()[0];
  long failEventExpiration = failEvent.getLease().getExpiration();


  logger.log(Level.FINE, "Number of failure events = " + 
        warnListener.getEvents().length);
  logger.log(Level.FINE, "Number of warning events = " + 
        failListener.getEvents().length);




  /* ASSERTION #1 :
     assert that the leases are the ones we expect */
  if (warnLease.equals(prepareLease(warnEvent.getRenewalSetLease())) == false) {
      String message = "Assertion #1 failed.\n" +
    "Expiration warning lease does not match\n" +
    "the lease encapsulated in the ExpirationWarningEvent " +
    "object.";
      throw new TestException(message);
  }


  if (failLease.equals(failEvent.getLease()) == false) {
      String message = "Assertion #1 has failed.\n" +
    "Renewal failure lease does not match the " +
    "lease encapsulated in the RenewalFailureEvent object.";
      throw new TestException(message);
  }


  logger.log(Level.FINE, "Assertion #1 passed.");


  /* ASSERTION #2 :
     the expiration will reflect the expiration of the lease
     when the event occurred. */


  long delta = warnLeaseExpiration - warnEventExpiration;
  if (Math.abs(delta) > roundTrip) {
      logger.log(Level.FINE, "Assertion #2 failed, delta = " + delta 
          + "  10*roundTrip = " + roundTrip);
      String message = "Assertion #2 has failed.\n" +
    "Expiration time of lease in warning event does not\n" +
    "reflect the expiration of the lease when the event " +
    "occurred.";
      throw new TestException(message);
  } else {
      logger.log(Level.FINE, "Assertion #2 passed, delta = " + delta 
          + "  10*roundTrip = " + roundTrip);
  }


  /*
   * This portion of the assertion is pretty weak. All it says
   * is that the expiration time on the lease is at least
   * within one renewGrant times worth of the original lease.
   * That's pretty broad and may not be particularly useful.
   * The problem is that there is no real way of determining
   * exactly what the lease expiration was at the time the renewal
   * failure event occurred and there is a significant (5 second)
   * time interval between the delivery of the marshalling of the
   * lease object and the delivery of the event.
   */
  if (failEventExpiration > nextFailExpiration) {
      String message = "Assertion #2 has failed.\n" +
    "Expiration time of lease in failure event does not\n" +
    "reflect the expiration of the lease when the event " +
    "occurred.";
      throw new TestException(message);
  }


  logger.log(Level.FINE, "Assertion #2 passed.");


  /* ASSERTION #3 :
     The Throwable Object is the one expected. */         
  Throwable failException = failEvent.getThrowable();
  Throwable targetException = getExpectedException();


  if (! (failException.getClass() == targetException.getClass())) {
      String message = "Assertion #3 has failed.\n" +
    "Throwable encapsulated by the RenewalFailureEvent is" +
    " of type " + failException.getClass() + 
    "\nbut an exception of type " + 
    targetException.getClass() + " is excepted.";
      throw new TestException(message);
  }


  if ((failException.getMessage().equals
       (targetException.getMessage())) == false) {
      String message = "Assertion #3 has failed.\n" +
    "Throwable encapsulated by the RenewalFailureEvent is" +
    " of type " + failException.getClass() + 
    "\nas expected but the instances are different.";
      throw new TestException(message);
  }


  logger.log(Level.FINE, "Assertion #3 passed.");


  /* ASSERTION #4
     The lease whose renewal failed should have been removed
     from the renewal set. */
  Lease managedLease = set.remove(failLease);
  if (managedLease != null) {
      String message = "Assertion #4 failed.\n" +
    "Failed lease was never removed from renewal set.";
      throw new TestException(message);
  }

View Full Code Here


  // create a renewal set
  long renewSetDur = 30000L; // 30 second lease
  logger.log(Level.FINE, "Creating renewal set with lease duration of " +
        renewSetDur + " milliseconds.");
  LeaseRenewalSet set = lrs.createLeaseRenewalSet(renewSetDur);
  set = prepareSet(set);
  lrm.renewFor(prepareLease(set.getRenewalSetLease()), renewSetDur, null);


  // grab two instances of the renewal set lease
  Lease lease01 = prepareLease(set.getRenewalSetLease());
  Lease lease02 = prepareLease(set.getRenewalSetLease());


  // they should be the same
  if (lease01.equals(lease02) == false) {
      String message = "GetRenewalSetLease has returned an\n" +
           "invalid lease.";
      throw new TestException(message);
  }


  /* okay they are the same lease but are they the correct lease??
     well, we can't be sure but we can check to make sure that the
     lease will expire in at least setRenewDur time. */
  logger.log(Level.FINE, "Removing lease from the LRM.");
  lrm.remove(lease01);
  lease01 = prepareLease(set.getRenewalSetLease());
  rstUtil.sleepAndTell(renewSetDur, "for client lease to expire.");
  if (rstUtil.isExpired(lease01) == false) {
      String message = "getRenewalSetLease seems to have\n" +
           "returned an invalid lease based upon\n" +
           "the expiration time.";

View Full Code Here

  // get a lease renewal set w/ duration of setLeaseGrant
  logger.log(Level.FINE, "Creating the lease renewal set.");
  logger.log(Level.FINE, "Duration = " + setLeaseGrant + 
        " milliseconds.");
  LeaseRenewalService lrs = getLRS();
  LeaseRenewalSet set = lrs.createLeaseRenewalSet(setLeaseGrant);
  set = prepareSet(set);
  
  // get a lease for some time less than the renewal set
  logger.log(Level.FINE, "Creating the lease to be managed.");
  logger.log(Level.FINE, "Duration = " + renewGrant);
  TestLease testLease = 
      leaseProvider.createNewLease(owner, 
           rstUtil.durToExp(renewGrant));


  // start managing the lease for as long as we can
  logger.log(Level.FINE, "Adding managed lease to lease renewal set.");
  set.renewFor(testLease, Long.MAX_VALUE);
  
  // Remove the lease. Removal should succeed.
  logger.log(Level.FINE, "Removing the managed lease from the set.");
  Lease managedLease = set.remove(testLease);
  if (managedLease == null) {
      String message = "Lease could not be removed from\n";
      message += "renewal set.";
      throw new TestException(message);
  }

View Full Code Here

  // grab the ever popular LRS
  LeaseRenewalService lrs = getLRS();


  // create a renewal set
  long renewSetDur = Lease.FOREVER;
  LeaseRenewalSet set = lrs.createLeaseRenewalSet(renewSetDur);
  set = prepareSet(set);
  logger.log(Level.FINE, "Created Set 01 with lease duration of " +
        "Lease.FOREVER.");


  // create a test lease to be managed
  logger.log(Level.FINE, "Creating the lease to be managed.");
  logger.log(Level.FINE, "Duration == Lease.FOREVER");
  TestLease testLease = 
      leaseProvider.createNewLease(leaseOwner, Lease.FOREVER);


  /* assert that using a membership duration of 0
     does NOT generate an IllegalArgumentException */
  try {
      set.renewFor(testLease, 0);
      // success, keep on trucking ...
  } catch (IllegalArgumentException ex) {
      String message = "An attempt to add a client lease\n";
      message += " with a 0 membership duration has failed.";
      throw new TestException(message, ex);
  }      


  /* assert that using a membership duration of -99 (negative test)
     does NOT generate an IllegalArgumentException */
  try {
      set.renewFor(testLease, -99);
      // success, keep on trucking ...  
  } catch (IllegalArgumentException ex) {
      String message = "An attempt to add a client lease\n";
      message += "with a negative membership duration has ";
      message += "failed.";
      throw new TestException(message, ex);
  }      


  // trying to remove the lease should result in null value
  Lease managedLease = set.remove(testLease);
  if (managedLease != null) {
      String message = "Lease was added to renewal set in error\n";
      message += "from a call to renewFor with 0 membership.";
      throw new TestException(message);
  }
  
  /* assert that using a membership duration of Lease.ANY
     does NOT generate an IllegalArgumentException */
  try {
      set.renewFor(testLease, Lease.ANY);
      set.remove(testLease);
      // success, keep on trucking ...
  } catch (IllegalArgumentException ex) {
      String message = "An attempt to add a client lease\n";
      message += "with a Lease.ANY membership duration\n";
      message += "has failed with an IllegalArgumentException.";
      throw new TestException(message, ex);
  }      


  /* assert that using a membership duration of Lease.FOREVER
     does NOT generate an IllegalArgumentException */
  try {
      set.renewFor(testLease, Lease.FOREVER);
      set.remove(testLease);
      // success, keep on trucking ...
  } catch (IllegalArgumentException ex) {
      String message = "An attempt to add a client lease\n";
      message += "with a Lease.FOREVER membership duration\n";
      message += "has failed with an IllegalArgumentException.";
      throw new TestException(message, ex);
  }      


  /* assert that using a membership duration of Long.MAX_VALUE
     does NOT generate an IllegalArgumentException */
  try {
      set.renewFor(testLease, Long.MAX_VALUE);
      set.remove(testLease);
      // success, keep on trucking ...
  } catch (IllegalArgumentException ex) {
      String message = "An attempt to add a client lease\n";
      message += "with a Long.MAX_VALUE membership duration\n";
      message += "has failed with an IllegalArgumentException.";
      throw new TestException(message, ex);
  }      


  /* assert that using a membership duration of 1 (edge case)
     does NOT generate an IllegalArgumentException */
  try {
      set.renewFor(testLease, 1);
      set.remove(testLease);
      // success, keep on trucking ...
  } catch (IllegalArgumentException ex) {
      String message = "An attempt to add a client lease\n";
      message += "with a 1 millisecond membership duration\n";
      message += "has failed with an IllegalArgumentException.";
      throw new TestException(message, ex);
  }      


  /* assert that using a membership duration of 30000 (normal case)
     does NOT generate an IllegalArgumentException */
  try {
      set.renewFor(testLease, 30000L);
      set.remove(testLease);
      // success, keep on trucking ...
  } catch (IllegalArgumentException ex) {
      String message = "An attempt to add a client lease\n";
      message += "with a 30000 millisecond membership duration\n";
      message += "has failed with an IllegalArgumentException.";

View Full Code Here


  // get a lease renewal set w/ duration for as long as we can
  logger.log(Level.FINE, "Creating the lease renewal set with duration" +
        " of Lease.FOREVER");
  LeaseRenewalService lrs = getLRS();
  LeaseRenewalSet set = lrs.createLeaseRenewalSet(Lease.FOREVER);
  set = prepareSet(set);
  lrm.renewFor(prepareLease(set.getRenewalSetLease()), Lease.FOREVER, null);


  
  // register listener to receive events
  logger.log(Level.FINE, "Registering listener for renewal failure" +
        " events.");
  set.setRenewalFailureListener(rrl  , null);


  /* create 6 test leases which will throw definite exceptions
     and add then to the renewal set. Three lease's expiration
     times are 30 seconds, the rest are 60 seconds. */
  TestLease[] lease = new TestLease[6];


  for (int i = 0; i < 6; i += 2) {
      logger.log(Level.FINE, "Creating lease with duration of " +
            renewGrant + " milliseconds.");
      lease[i] = 
    shortLeaseProvider.createNewLease(owner, 
               rstUtil.durToExp(renewGrant));
      set.renewFor(lease[i], Lease.FOREVER);
      logger.log(Level.FINE, "Creating lease with duration of " +
            renewGrant*3 + " milliseconds.");
      lease[i+1] = 
    longLeaseProvider.createNewLease(owner, 
             rstUtil.durToExp(renewGrant*3));
      set.renewFor(lease[i+1], Lease.FOREVER);
  }


  // allow the leases with lower duration times to expire
  rstUtil.waitForLeaseExpiration(lease[4],
      "for client leases with lower expiration times to expire.");


  // remove the listener many times to ensure no ill effect
  try {
      for (int i = 0; i < 10; ++i) {
    set.clearRenewalFailureListener();
      }
  } catch (Exception ex) {
      String message = "Multiple calls to " +
    "clearRenewalFailureListener raises an exception.";
      throw new TestException(message, ex);
  }


  // assert that only 3 calls to notify have been made
  int numberOfEvents = rrl.getEvents().length;
  if (numberOfEvents != 3) {
      String message = "Check #1:\n" +
    "Listener received " + numberOfEvents +
    " events but is required to receive exactly 3.";
      throw new TestException(message);
  }
  
  // wait for the rest of the leases to expire
  rstUtil.waitForLeaseExpiration(lease[5],
       "for the remaining client leases to expire.");


  // assert that all leases have expired
  for (int i = 0; i < 6; ++i) {
      Lease managedLease = set.remove(lease[i]);
      if (managedLease != null) {
    String message = "Lease #" + i + " did not expire as " +
        "expect.";
    throw new TestException(message);
      }

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      setTable.put(newID, newSet);
  } finally {
      store.releaseMutatorLock();
  }


  LeaseRenewalSet result = SetProxy.create(serverProxy, newID, newLease);
  logger.log(Level.FINE, "Created lease renewal set {0}", result);
  return result;
    }

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Related Classes of net.jini.lease.LeaseRenewalSet

com.sun.jini.norm.NormServerBaseImpl

com.sun.jini.test.impl.norm.AddRenewRemoveTest

com.sun.jini.test.impl.norm.BatchRenewTest

com.sun.jini.test.impl.norm.ExpiredLeaseTest

com.sun.jini.test.impl.norm.GetLeasesTest

com.sun.jini.test.impl.norm.LeaseExpirationTest

com.sun.jini.test.impl.norm.OneExpireOneNotTest

com.sun.jini.test.impl.norm.RemoveExactlyOneTest

com.sun.jini.test.impl.norm.RenewalFailureTest

com.sun.jini.test.impl.norm.RenewAtTest

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