/**
* Remove a peer from the list. In order to not reappear, the node is put for a certain time in a
* cache list to keep the node removed. This method is thread-safe.
*
* @param remotePeer The node that should be removed
* @param force A flag that removes a peer immediately.
* @return True if the neighbor was removed and added to a cache list. False if peer has not been
* removed or is already in the peer removed temporarly list.
*/
public boolean peerOffline(final PeerAddress remotePeer, final boolean force) {
if (logger.isDebugEnabled()) {
logger.debug("peer " + remotePeer + " is offline");
}
if (remotePeer.getID().isZero() || self().equals(remotePeer.getID())) {
return false;
}
notifyPeerFail(remotePeer, force);
Log log;
synchronized (peerOfflineLogs) {
log = peerOfflineLogs.get(remotePeer);
if (log == null) {
log = new Log();
peerOfflineLogs.put(remotePeer, log);
}
}
synchronized (log) {
if (!force) {
if (shouldPeerBeRemoved(log)) {
remove(remotePeer, Reason.NOT_REACHABLE);
return true;
}
log.inc();
if (!shouldPeerBeRemoved(log)) {
peerMapStat.removeStat(remotePeer);
addToMaintenanceQueue(remotePeer);
return false;
}
} else {
log.set(maxFail);
}
}
remove(remotePeer, Reason.NOT_REACHABLE);
return true;
}
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;
}
private void prepareInsertOrUpdate(PeerAddress remotePeer, boolean firstHand) {
if (firstHand) {
peerMapStat.setSeenOnlineTime(remotePeer);
// get the amount of milliseconds for the online time
long online = peerMapStat.online(remotePeer);
// get the time we want to wait between maintenance checks
if (maintenanceTimeoutsSeconds.length > 0) {
int checked = peerMapStat.getChecked(remotePeer);
if (checked >= maintenanceTimeoutsSeconds.length)
checked = maintenanceTimeoutsSeconds.length - 1;
long time = maintenanceTimeoutsSeconds[checked] * 1000L;
// if we have a higer online time than the maintenance time,
// increase checked to increase the maintenace interval.
if (online >= time) {
peerMapStat.incChecked(remotePeer);
}
}
}
addToMaintenanceQueue(remotePeer);
}