/**
  * Indicates if a peer needs a maintenance check.
  *
  * @param peerStatatistic The peer with its statistics
  * @return True if the peer needs a maintenance check
  */
 protected boolean needMaintenance(final PeerStatatistic peerStatatistic) {
   final int onlineSec = peerStatatistic.onlineTime() / 1000;
   int index;
   if (onlineSec <= 0) {
     index = 0;
   } else {
     index = intervalSeconds.length - 1;
     for (int i = 0; i < intervalSeconds.length; i++) {
       // interval is 2,4,8,16,32,64
       // examples
       // I have seen a peer online for 5 sec -> next interval to check is 8
       // I have seen a peer online for 4 sec -> next interval to check is 4
       // I have seen a peer online for 17 sec -> next interval to check is 32
       // I have seen a peer online for 112321 sec -> next interval to check is 64
       if (intervalSeconds[i] >= onlineSec) {
         index = i;
         break;
       }
     }
   }
   final int time = intervalSeconds[index];
   final long lastTimeWhenChecked =
       Timings.currentTimeMillis() - peerStatatistic.getLastSeenOnline();
   return lastTimeWhenChecked > TimeUnit.SECONDS.toMillis(time);
 }
Example #2
0
 private void addToMaintenanceQueue(PeerAddress remotePeer) {
   if (maintenanceTimeoutsSeconds.length == 0) return;
   long scheduledCheck;
   if (peerMapStat.getLastSeenOnlineTime(remotePeer) == 0) {
     // we need to check now!
     scheduledCheck = Timings.currentTimeMillis();
   } else {
     // check for next schedule
     int checked = peerMapStat.getChecked(remotePeer);
     if (checked >= maintenanceTimeoutsSeconds.length)
       checked = maintenanceTimeoutsSeconds.length - 1;
     scheduledCheck = Timings.currentTimeMillis() + (maintenanceTimeoutsSeconds[checked] * 1000L);
   }
   synchronized (maintenance) {
     maintenance.put(remotePeer, scheduledCheck);
   }
 }
Example #3
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 /**
  * Checks if this peer has been removed. A peer that has been removed will be stored in a cache
  * list for a certain time. This method is tread-safe
  *
  * @param node The node to check
  * @return True if the peer has been removed recently
  */
 public boolean isPeerRemovedTemporarly(PeerAddress remotePeer) {
   Log log;
   synchronized (peerOfflineLogs) {
     log = peerOfflineLogs.get(remotePeer);
   }
   if (log != null) {
     synchronized (log) {
       if (shouldPeerBeRemoved(log)) return true;
       else if (Timings.currentTimeMillis() - log.getLastOffline() > cacheTimeout) {
         // remove the peer if timeout occured
         synchronized (peerOfflineLogs) {
           peerOfflineLogs.remove(remotePeer);
         }
       }
     }
   }
   return false;
 }
Example #4
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 public Collection<PeerAddress> peersForMaintenance() {
   Collection<PeerAddress> result = new ArrayList<PeerAddress>();
   final long now = Timings.currentTimeMillis();
   synchronized (maintenance) {
     for (Iterator<Map.Entry<PeerAddress, Long>> iterator = maintenance.entrySet().iterator();
         iterator.hasNext(); ) {
       Map.Entry<PeerAddress, Long> entry = iterator.next();
       if (entry.getValue() <= now) {
         iterator.remove();
         result.add(entry.getKey());
       }
     }
   }
   // add to maintenance queue with new timings
   for (PeerAddress peerAddress : result) {
     addToMaintenanceQueue(peerAddress);
   }
   return result;
 }
Example #5
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 private void inc() {
   counter++;
   lastOffline = Timings.currentTimeMillis();
 }
Example #6
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 private boolean shouldPeerBeRemoved(Log log) {
   return Timings.currentTimeMillis() - log.getLastOffline() <= cacheTimeout
       && log.getCounter() >= maxFail;
 }
Example #7
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 private void set(int counter) {
   this.counter = counter;
   lastOffline = Timings.currentTimeMillis();
 }