/// <remarks>
/// Finds the corresponding NakReceiverWindow and adds the message to it (according to seqno). Then removes
/// as many messages as possible from the NRW and passes them up the stack. Discards messages from non-members.
/// </remarks>
/// <summary>
/// Results in all possible messages from sender being delivered up the stacks
/// </summary>
/// <param name="msg"></param>
/// <param name="hdr"></param>
void handleMessage(Message msg, NakAckHeader hdr)
{
NakReceiverWindow win = null;
Message msg_to_deliver;
Address sender;
if (msg == null || hdr == null)
{
if (Trace.trace)
{
Trace.error("NAKACK.handleMessage()", "msg or header is null");
}
return;
}
sender = msg.Source;
if (sender == null)
{
if (Trace.trace)
{
Trace.error("NAKACK.handleMessage()", "sender of message is null");
}
return;
}
if (Trace.trace)
{
Trace.info("NAKACK.handleMessage()", "[" + local_addr + "] received <" + sender + "#" + hdr.seqno + ">");
}
// msg is potentially re-sent later as result of XMIT_REQ reception; that's why hdr is added !
msg.putHeader(getName(), hdr);
win = (NakReceiverWindow)received_msgs[sender];
if (win == null)
{ // discard message if there is no entry for sender
if (leaving)
{
return;
}
if (Trace.trace)
{
Trace.warn("NAKACK.handleMessage()", "[" + local_addr + "] discarded message from non-member " + sender);
}
return;
}
win.add(hdr.seqno, msg); // add in order, then remove and pass up as many msgs as possible
while ((msg_to_deliver = win.remove()) != null)
{
msg_to_deliver.removeHeader(getName());
passUp(new Event(Event.MSG, msg_to_deliver));
}
}
/* ---------------------- Interface Retransmitter.RetransmitCommand ---------------------- */
/// <summary>
/// Implementation of Retransmitter.RetransmitCommand, sends XMIT_REQ to originator of message
/// </summary>
/// <param name="first_seqno">First sequence number missing</param>
/// <param name="last_seqno">Last sequence number missing</param>
/// <param name="sender">Origin of the message</param>
public void retransmit(long first_seqno, long last_seqno, Address sender)
{
lock (this)
{
NakAckHeader hdr;
Message retransmit_msg = new Message(sender, null, null);
if (Trace.trace)
{
Trace.info("NAKACK.retransmit()", "sending XMIT_REQ ([" + first_seqno +
", " + last_seqno + "]) to " + sender);
}
hdr = new NakAckHeader(NakAckHeader.XMIT_REQ, first_seqno, last_seqno);
retransmit_msg.putHeader(getName(), hdr);
passDown(new Event(Event.MSG, retransmit_msg));
}
}
/// <remarks>
/// Finds the corresponding NakReceiverWindow and adds the message to it (according to seqno). Then removes
/// as many messages as possible from the NRW and passes them up the stack. Discards messages from non-members.
/// </remarks>
/// <summary>
/// Results in all possible messages from sender being delivered up the stacks
/// </summary>
/// <param name="msg"></param>
/// <param name="hdr"></param>
void handleMessage(Message msg, NakAckHeader hdr)
{
NakReceiverWindow win=null;
Message msg_to_deliver;
Address sender;
if(msg == null || hdr == null)
{
if(Trace.trace)
Trace.error("NAKACK.handleMessage()", "msg or header is null");
return;
}
sender=msg.Source;
if(sender == null)
{
if(Trace.trace)
Trace.error("NAKACK.handleMessage()", "sender of message is null");
return;
}
if(Trace.trace)
Trace.info("NAKACK.handleMessage()", "[" + local_addr + "] received <" + sender + "#" + hdr.seqno + ">");
// msg is potentially re-sent later as result of XMIT_REQ reception; that's why hdr is added !
msg.putHeader(getName(), hdr);
win=(NakReceiverWindow)received_msgs[sender];
if(win == null)
{ // discard message if there is no entry for sender
if(leaving)
return;
if(Trace.trace)
Trace.warn("NAKACK.handleMessage()", "[" + local_addr + "] discarded message from non-member " + sender);
return;
}
win.add(hdr.seqno, msg); // add in order, then remove and pass up as many msgs as possible
while((msg_to_deliver=win.remove()) != null)
{
msg_to_deliver.removeHeader(getName());
passUp(new Event(Event.MSG, msg_to_deliver));
}
}
/* ---------------------- Interface Retransmitter.RetransmitCommand ---------------------- */
/// <summary>
/// Implementation of Retransmitter.RetransmitCommand, sends XMIT_REQ to originator of message
/// </summary>
/// <param name="first_seqno">First sequence number missing</param>
/// <param name="last_seqno">Last sequence number missing</param>
/// <param name="sender">Origin of the message</param>
public void retransmit(long first_seqno, long last_seqno, Address sender)
{
lock(this)
{
NakAckHeader hdr;
Message retransmit_msg = new Message(sender, null, null);
if(Trace.trace)
Trace.info("NAKACK.retransmit()", "sending XMIT_REQ ([" + first_seqno +
", " + last_seqno + "]) to " + sender);
hdr=new NakAckHeader(NakAckHeader.XMIT_REQ, first_seqno, last_seqno);
retransmit_msg.putHeader(getName(), hdr);
passDown(new Event(Event.MSG, retransmit_msg));
}
}