public void sendDiscoveryRequest(String cluster_name, Promise promise, ViewId view_id)
throws Exception {
PingData data = null;
PhysicalAddress physical_addr =
(PhysicalAddress) down(new Event(Event.GET_PHYSICAL_ADDRESS, local_addr));
if (view_id == null) {
List<PhysicalAddress> physical_addrs = Arrays.asList(physical_addr);
data = new PingData(local_addr, null, false, UUID.get(local_addr), physical_addrs);
}
PingHeader hdr = new PingHeader(PingHeader.GET_MBRS_REQ, data, cluster_name);
hdr.view_id = view_id;
Collection<PhysicalAddress> cluster_members = fetchClusterMembers(cluster_name);
if (cluster_members == null) {
Message msg = new Message(null); // multicast msg
msg.setFlag(Message.OOB);
msg.putHeader(getId(), hdr);
sendMcastDiscoveryRequest(msg);
} else {
if (cluster_members.isEmpty()) { // if we don't find any members, return immediately
if (promise != null) promise.setResult(null);
} else {
for (final Address addr : cluster_members) {
if (addr.equals(physical_addr)) // no need to send the request to myself
continue;
final Message msg = new Message(addr, null, null);
msg.setFlag(Message.OOB);
msg.putHeader(this.id, hdr);
if (log.isTraceEnabled())
log.trace("[FIND_INITIAL_MBRS] sending discovery request to " + msg.getDest());
if (!sendDiscoveryRequestsInParallel()) {
down_prot.down(new Event(Event.MSG, msg));
} else {
timer.execute(
new Runnable() {
public void run() {
try {
down_prot.down(new Event(Event.MSG, msg));
} catch (Exception ex) {
if (log.isErrorEnabled())
log.error("failed sending discovery request to " + addr + ": " + ex);
}
}
});
}
}
}
}
}
public Responses findMembers(
final List<Address> members, final boolean initial_discovery, boolean async) {
num_discovery_requests++;
int num_expected = members != null ? members.size() : 0;
int capacity = members != null ? members.size() : 16;
final Responses rsps =
new Responses(num_expected, initial_discovery && break_on_coord_rsp, capacity);
synchronized (ping_responses) {
ping_responses.put(System.nanoTime(), rsps);
}
if (async || async_discovery)
timer.execute(() -> findMembers(members, initial_discovery, rsps));
else findMembers(members, initial_discovery, rsps);
weedOutCompletedDiscoveryResponses();
return rsps;
}
protected synchronized void startCacheDissemination(
List<Address> curr_mbrs, List<Address> left_mbrs, List<Address> new_mbrs) {
timer.execute(new DiscoveryCacheDisseminationTask(curr_mbrs, left_mbrs, new_mbrs));
}