/** * 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; }