/**
* We need to resend our first message with our conn_id
*
* @param sender
* @param seqno Resend messages in the range [lowest .. seqno]
*/
private void handleResendingOfFirstMessage(Address sender, long seqno) {
if (log.isTraceEnabled())
log.trace(local_addr + " <-- SEND_FIRST_SEQNO(" + sender + "," + seqno + ")");
SenderEntry entry = send_table.get(sender);
AckSenderWindow win = entry != null ? entry.sent_msgs : null;
if (win == null) {
if (log.isErrorEnabled())
log.error(local_addr + ": sender window for " + sender + " not found");
return;
}
long lowest = win.getLowest();
Message rsp = win.get(lowest);
if (rsp == null) return;
// We need to copy the UnicastHeader and put it back into the message because Message.copy()
// doesn't copy
// the headers and therefore we'd modify the original message in the sender retransmission
// window
// (https://jira.jboss.org/jira/browse/JGRP-965)
Message copy = rsp.copy();
Unicast2Header hdr = (Unicast2Header) copy.getHeader(this.id);
Unicast2Header newhdr = hdr.copy();
newhdr.first = true;
copy.putHeader(this.id, newhdr);
if (log.isTraceEnabled()) {
StringBuilder sb = new StringBuilder();
sb.append(local_addr)
.append(" --> DATA(")
.append(copy.getDest())
.append(": #")
.append(newhdr.seqno)
.append(", conn_id=")
.append(newhdr.conn_id);
if (newhdr.first) sb.append(", first");
sb.append(')');
log.trace(sb);
}
down_prot.down(new Event(Event.MSG, copy));
if (++lowest > seqno) return;
for (long i = lowest; i <= seqno; i++) {
rsp = win.get(i);
if (rsp != null) down_prot.down(new Event(Event.MSG, rsp));
}
}
/**
* 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 highest_delivered
* @param highest_seen
*/
protected void stable(Address sender, short conn_id, long highest_delivered, long highest_seen) {
SenderEntry entry = send_table.get(sender);
AckSenderWindow 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(highest_delivered)
.append("-")
.append(highest_seen)
.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.ack(highest_delivered);
long win_high = win.getHighest();
if (win_high > highest_seen) {
for (long seqno = highest_seen; seqno <= win_high; 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));
}
}
}
private void handleXmitRequest(Address sender, long low, long high) {
if (log.isTraceEnabled())
log.trace(
new StringBuilder()
.append(local_addr)
.append(" <-- XMIT(")
.append(sender)
.append(": #")
.append(low)
.append("-")
.append(high)
.append(')'));
SenderEntry entry = send_table.get(sender);
AckSenderWindow win = entry != null ? entry.sent_msgs : null;
if (win != null) {
for (long i = low; i <= high; i++) {
Message msg = win.get(i);
if (msg == null) {
if (log.isWarnEnabled() && !local_addr.equals(sender)) {
StringBuilder sb = new StringBuilder();
sb.append("(requester=").append(sender).append(", local_addr=").append(this.local_addr);
sb.append(") message ").append(sender).append("::").append(i);
sb.append(" not found in retransmission table of ")
.append(sender)
.append(":\n")
.append(win);
log.warn(sb.toString());
}
continue;
}
down_prot.down(new Event(Event.MSG, msg));
num_xmits++;
}
}
}
void reset() {
if (sent_msgs != null) sent_msgs.reset();
sent_msgs_seqno = DEFAULT_FIRST_SEQNO;
}
