/**
* A private method used to re-establish a zookeeper session with a peer cluster.
*
* @param ke
* @param peer
*/
private void reconnectPeer(KeeperException ke, ReplicationPeer peer) {
if (ke instanceof ConnectionLossException
|| ke instanceof SessionExpiredException
|| ke instanceof AuthFailedException) {
LOG.warn("Lost the ZooKeeper connection for peer " + peer.getClusterKey(), ke);
try {
peer.reloadZkWatcher();
peer.getZkw().registerListener(new PeerRegionServerListener(peer));
} catch (IOException io) {
LOG.warn("Creation of ZookeeperWatcher failed for peer " + peer.getClusterKey(), io);
}
}
}
/**
* This method connects this cluster to another one and registers it in this region server's
* replication znode
*
* @param peerId id of the peer cluster
*/
public boolean connectToPeer(String peerId) throws IOException {
if (this.clientOnly) {
return false;
}
if (this.peerClusters.containsKey(peerId)) {
return false;
// TODO remove when we support it
} else if (this.peerClusters.size() > 0) {
LOG.warn("Multiple slaves feature not supported");
return false;
}
ReplicationPeer peer = getPeer(peerId);
if (peer == null) {
return false;
}
this.peerClusters.put(peerId, peer);
this.zookeeperWrapper.ensureExists(
this.zookeeperWrapper.getZNode(this.rsServerNameZnode, peerId));
LOG.info("Added new peer cluster " + peer.getClusterKey());
return true;
}
@Override
public boolean connectToPeer(String peerId) throws ReplicationException {
if (peerClusters == null) {
return false;
}
if (this.peerClusters.containsKey(peerId)) {
return false;
}
ReplicationPeer peer = null;
try {
peer = getPeer(peerId);
} catch (Exception e) {
throw new ReplicationException("Error connecting to peer with id=" + peerId, e);
}
if (peer == null) {
return false;
}
this.peerClusters.put(peerId, peer);
LOG.info("Added new peer cluster " + peer.getClusterKey());
return true;
}
