protected void handleAckReceived(Address sender, long seqno, short conn_id) {
if (log.isTraceEnabled())
log.trace(
new StringBuilder()
.append(local_addr)
.append(" <-- ACK(")
.append(sender)
.append(": #")
.append(seqno)
.append(", conn-id=")
.append(conn_id)
.append(')'));
SenderEntry entry = send_table.get(sender);
if (entry != null && entry.send_conn_id != conn_id) {
if (log.isTraceEnabled())
log.trace(
local_addr
+ ": my conn_id ("
+ entry.send_conn_id
+ ") != received conn_id ("
+ conn_id
+ "); discarding ACK");
return;
}
Table<Message> win = entry != null ? entry.sent_msgs : null;
if (win != null) {
win.purge(seqno, true); // removes all messages <= seqno (forced purge)
num_acks_received++;
}
}
/**
* Purge all messages in window for local_addr, which are <= low. Check if the window's highest
* received message is > high: if true, retransmit all messages from high - win.high to sender
*
* @param sender
* @param hd Highest delivered seqno
* @param hr Highest received seqno
*/
protected void stable(Address sender, short conn_id, long hd, long hr) {
SenderEntry entry = send_table.get(sender);
Table<Message> win = entry != null ? entry.sent_msgs : null;
if (win == null) return;
if (log.isTraceEnabled())
log.trace(
new StringBuilder()
.append(local_addr)
.append(" <-- STABLE(")
.append(sender)
.append(": ")
.append(hd)
.append("-")
.append(hr)
.append(", conn_id=" + conn_id)
+ ")");
if (entry.send_conn_id != conn_id) {
log.warn(
local_addr
+ ": my conn_id ("
+ entry.send_conn_id
+ ") != received conn_id ("
+ conn_id
+ "); discarding STABLE message !");
return;
}
win.purge(hd, true);
long win_hr = win.getHighestReceived();
if (win_hr > hr) {
for (long seqno = hr; seqno <= win_hr; seqno++) {
Message msg =
win.get(
seqno); // destination is still the same (the member which sent the STABLE message)
if (msg != null) down_prot.down(new Event(Event.MSG, msg));
}
}
}