/**
* Sends the new view and digest to all subgroup coordinors in coords. Each coord will in turn
*
* <ol>
* <li>broadcast the new view and digest to all the members of its subgroup (MergeView)
* <li>on reception of the view, if it is a MergeView, each member will set the digest and
* install the new view
* </ol>
*/
private void sendMergeView(
Collection<Address> coords, MergeData combined_merge_data, MergeId merge_id) {
if (coords == null || combined_merge_data == null) return;
View view = combined_merge_data.view;
Digest digest = combined_merge_data.digest;
if (view == null || digest == null) {
if (log.isErrorEnabled())
log.error("view or digest is null, cannot send consolidated merge view/digest");
return;
}
if (log.isDebugEnabled())
log.debug(
gms.local_addr + ": sending merge view " + view.getVid() + " to coordinators " + coords);
gms.merge_ack_collector.reset(coords);
int size = gms.merge_ack_collector.size();
long timeout = gms.view_ack_collection_timeout;
long start = System.currentTimeMillis();
for (Address coord : coords) {
Message msg = new Message(coord, null, null);
GMS.GmsHeader hdr = new GMS.GmsHeader(GMS.GmsHeader.INSTALL_MERGE_VIEW);
hdr.view = view;
hdr.my_digest = digest;
hdr.merge_id = merge_id;
msg.putHeader(gms.getId(), hdr);
gms.getDownProtocol().down(new Event(Event.MSG, msg));
}
// [JGRP-700] - FLUSH: flushing should span merge
// if flush is in stack wait for acks from separated island coordinators
if (gms.flushProtocolInStack) {
try {
gms.merge_ack_collector.waitForAllAcks(timeout);
long stop = System.currentTimeMillis();
if (log.isTraceEnabled())
log.trace(
"received all ACKs ("
+ size
+ ") for merge view "
+ view
+ " in "
+ (stop - start)
+ "ms");
} catch (TimeoutException e) {
log.warn(
gms.local_addr
+ ": failed to collect all ACKs for merge ("
+ size
+ ") for view "
+ view
+ " after "
+ timeout
+ "ms, missing ACKs from "
+ gms.merge_ack_collector.printMissing());
}
}
}
/**
* Fetches the digests from all members and installs them again. Used only for diagnosis and
* support; don't use this otherwise !
*/
void fixDigests() {
Digest digest = fetchDigestsFromAllMembersInSubPartition(gms.view.getMembers());
Message msg = new Message();
GMS.GmsHeader hdr = new GMS.GmsHeader(GMS.GmsHeader.INSTALL_DIGEST);
hdr.my_digest = digest;
msg.putHeader(gms.getId(), hdr);
gms.getDownProtocol().down(new Event(Event.MSG, msg));
}
/** Send back a response containing view and digest to sender */
private void sendMergeResponse(Address sender, View view, Digest digest, MergeId merge_id) {
Message msg = new Message(sender).setFlag(Message.Flag.OOB, Message.Flag.INTERNAL);
GMS.GmsHeader hdr = new GMS.GmsHeader(GMS.GmsHeader.MERGE_RSP);
hdr.merge_id = merge_id;
hdr.view = view;
hdr.my_digest = digest;
msg.putHeader(gms.getId(), hdr);
if (log.isTraceEnabled()) log.trace(gms.local_addr + ": sending merge response=" + hdr);
gms.getDownProtocol().down(new Event(Event.MSG, msg));
}