private void monitorDnsChange(final SingleServerConfig cfg) {
monitorFuture =
GlobalEventExecutor.INSTANCE.scheduleWithFixedDelay(
new Runnable() {
@Override
public void run() {
try {
InetAddress master = currentMaster.get();
InetAddress now = InetAddress.getByName(cfg.getAddress().getHost());
if (!now.getHostAddress().equals(master.getHostAddress())) {
log.info(
"Detected DNS change. {} has changed from {} to {}",
cfg.getAddress().getHost(),
master.getHostAddress(),
now.getHostAddress());
if (currentMaster.compareAndSet(master, now)) {
changeMaster(
MAX_SLOT, cfg.getAddress().getHost(), cfg.getAddress().getPort());
log.info("Master has been changed");
}
}
} catch (Exception e) {
log.error(e.getMessage(), e);
}
}
},
cfg.getDnsMonitoringInterval(),
cfg.getDnsMonitoringInterval(),
TimeUnit.MILLISECONDS);
}
private void scheduleClusterChangeCheck(final ClusterServersConfig cfg) {
monitorFuture =
GlobalEventExecutor.INSTANCE.schedule(
new Runnable() {
@Override
public void run() {
List<URI> nodes = new ArrayList<URI>();
List<URI> slaves = new ArrayList<URI>();
AtomicReference<Throwable> lastException = new AtomicReference<Throwable>();
for (ClusterPartition partition : lastPartitions.values()) {
if (!partition.isMasterFail()) {
nodes.add(partition.getMasterAddress());
}
Set<URI> partitionSlaves = new HashSet<URI>(partition.getSlaveAddresses());
partitionSlaves.removeAll(partition.getFailedSlaveAddresses());
slaves.addAll(partitionSlaves);
}
// master nodes first
nodes.addAll(slaves);
checkClusterState(cfg, nodes.iterator(), lastException);
}
},
cfg.getScanInterval(),
TimeUnit.MILLISECONDS);
}
public Future<Boolean> addAsync(final V value) {
final Promise<Boolean> promise = new DefaultPromise<Boolean>() {};
GlobalEventExecutor.INSTANCE.execute(
new Runnable() {
@Override
public void run() {
try {
boolean res = add(value);
promise.setSuccess(res);
} catch (Exception e) {
promise.setFailure(e);
}
}
});
return promise;
}