@Override
public void peerInserted(final PeerAddress peerAddress, final boolean verified) {
if (!isReplicationEnabled() || !verified) {
return;
}
LOG.debug("The peer {} was inserted in my map. I'm {}", peerAddress, selfAddress);
// check if we should change responsibility.
Collection<Number160> myResponsibleLocations =
replicationStorage.findContentForResponsiblePeerID(selfAddress.getPeerId());
LOG.debug("I ({}) am currently responsibel for {}", selfAddress, myResponsibleLocations);
for (Number160 myResponsibleLocation : myResponsibleLocations) {
PeerAddress closest = closest(myResponsibleLocation);
if (!closest.getPeerId().equals(selfAddress.getPeerId())) {
if (replicationStorage.updateResponsibilities(myResponsibleLocation, closest.getPeerId())) {
// notify that someone else is now responsible for the
// content with key responsibleLocations
notifyOtherResponsible(myResponsibleLocation, closest, false);
// cancel any pending notifyMeResponsible*, as we are not responsible anymore.
}
} else if (isInReplicationRange(myResponsibleLocation, peerAddress, replicationFactor)) {
// we are still responsible, but a new peer joined and if it is within the x close peers, we
// need to
// replicate
if (replicationStorage.updateResponsibilities(
myResponsibleLocation, selfAddress.getPeerId())) {
// I figured out I'm the new responsible, so check all my peer in the replication range
notifyMeResponsible(myResponsibleLocation);
} else {
// new peer joined, I'm responsible, so replicate to that peer
notifyMeResponsible(myResponsibleLocation, peerAddress);
}
}
}
}
/**
* Update responsibilities. This happens for a put / add.
*
* @param locationKey The location key.
*/
public void updateAndNotifyResponsibilities(final Number160 locationKey) {
if (!isReplicationEnabled()) {
return;
}
PeerAddress closest = closest(locationKey);
if (closest.getPeerId().equals(selfAddress.getPeerId())) {
if (replicationStorage.updateResponsibilities(locationKey, closest.getPeerId())) {
// I am responsible for this content
notifyMeResponsible(locationKey);
}
} else {
if (replicationStorage.updateResponsibilities(locationKey, closest.getPeerId())) {
// notify that someone else is now responsible for the
// content with key responsibleLocations
notifyOtherResponsible(locationKey, closest, false);
}
}
}
@Override
public void peerRemoved(final PeerAddress peerAddress, final PeerStatatistic peerStatatistic) {
if (!isReplicationEnabled()) {
return;
}
// check if we should change responsibility.
Collection<Number160> otherResponsibleLocations =
replicationStorage.findContentForResponsiblePeerID(peerAddress.getPeerId());
Collection<Number160> myResponsibleLocations =
replicationStorage.findContentForResponsiblePeerID(selfAddress.getPeerId());
// check if we are now responsible for content where the other peer was responsible
for (Number160 otherResponsibleLocation : otherResponsibleLocations) {
PeerAddress closest = closest(otherResponsibleLocation);
if (closest.getPeerId().equals(selfAddress.getPeerId())) {
if (replicationStorage.updateResponsibilities(
otherResponsibleLocation, closest.getPeerId())) {
// notify that someone I'm now responsible for the
// content
// with key responsibleLocations
notifyMeResponsible(otherResponsibleLocation);
// we don't need to check this again, so remove it from the list if present
myResponsibleLocations.remove(otherResponsibleLocation);
}
} else {
if (replicationStorage.updateResponsibilities(
otherResponsibleLocation, closest.getPeerId())) {
LOG.debug("We should check if the closer peer has the content");
notifyOtherResponsible(otherResponsibleLocation, closest, true);
}
}
}
// now check for our responsibilities. If a peer is gone and it was in the replication range, we
// need make sure
// we have enough copies
for (Number160 myResponsibleLocation : myResponsibleLocations) {
if (isInReplicationRange(myResponsibleLocation, peerAddress, replicationFactor)) {
notifyMeResponsible(myResponsibleLocation);
}
}
}