/// <summary>
/// Processes <c>Events</c> traveling down the stack
/// </summary>
/// <param name="evt">The Event to be processed</param>
public override void down(Event evt)
{
Message msg;
Object dst;
Entry entry;
UnicastHeader hdr;
switch(evt.Type)
{
case Event.MSG: // Add UnicastHeader, add to AckSenderWindow and pass down
msg=(Message)evt.Arg;
dst=msg.Destination;
/* only handle unicast messages */
if(dst == null || ((Address)dst).isMulticastAddress())
break;
entry = (Entry)connections[dst];
if(entry == null)
{
entry = new Entry(this);
connections.Add(dst, entry);
}
hdr = new UnicastHeader(UnicastHeader.DATA, entry.sent_msgs_seqno);
if(entry.sent_msgs == null)
{ // first msg to peer 'dst'
hdr.first=true;
entry.sent_msgs = new AckSenderWindow(this, timeout, this);
if(window_size > 0)
entry.sent_msgs.setWindowSize(window_size, min_threshold);
}
msg.putHeader(getName(), hdr);
if(Trace.trace)
Trace.info("UNICAST.down()", "[" + local_addr + "] --> DATA(" + dst + ": #" + entry.sent_msgs_seqno + ", first=" + hdr.first + ")");
entry.sent_msgs.add(entry.sent_msgs_seqno, msg); // add *including* UnicastHeader
entry.sent_msgs_seqno++;
return; // AckSenderWindow will send message for us
case Event.BECOME_SERVER:
operational=true;
break;
case Event.VIEW_CHANGE: // remove connections to peers that are not members anymore !
ArrayList new_members=((View)evt.Arg).getMembers();
ArrayList left_members = new ArrayList();
lock(members)
{
foreach(Address a in members)
left_members.Add(a.Copy());
members.Clear();
if(new_members != null)
members.AddRange(new_members);
foreach(Address a in members)
{
if(left_members.Contains(a))
left_members.Remove(a);
}
foreach(Address oldMbr in left_members)
{
entry=(Entry)connections[oldMbr];
entry.reset();
connections.Remove(oldMbr);
}
}
break;
} // switch
passDown(evt); // Pass on to the layer below us
}
/// <summary>
/// Processes <c>Events</c> traveling down the stack
/// </summary>
/// <param name="evt">The Event to be processed</param>
public override void down(Event evt)
{
Message msg;
Object dst;
Entry entry;
UnicastHeader hdr;
switch (evt.Type)
{
case Event.MSG: // Add UnicastHeader, add to AckSenderWindow and pass down
msg = (Message)evt.Arg;
dst = msg.Destination;
/* only handle unicast messages */
if (dst == null || ((Address)dst).isMulticastAddress())
{
break;
}
entry = (Entry)connections[dst];
if (entry == null)
{
entry = new Entry(this);
connections.Add(dst, entry);
}
hdr = new UnicastHeader(UnicastHeader.DATA, entry.sent_msgs_seqno);
if (entry.sent_msgs == null)
{ // first msg to peer 'dst'
hdr.first = true;
entry.sent_msgs = new AckSenderWindow(this, timeout, this);
if (window_size > 0)
{
entry.sent_msgs.setWindowSize(window_size, min_threshold);
}
}
msg.putHeader(getName(), hdr);
if (Trace.trace)
{
Trace.info("UNICAST.down()", "[" + local_addr + "] --> DATA(" + dst + ": #" + entry.sent_msgs_seqno + ", first=" + hdr.first + ")");
}
entry.sent_msgs.add(entry.sent_msgs_seqno, msg); // add *including* UnicastHeader
entry.sent_msgs_seqno++;
return; // AckSenderWindow will send message for us
case Event.BECOME_SERVER:
operational = true;
break;
case Event.VIEW_CHANGE: // remove connections to peers that are not members anymore !
ArrayList new_members = ((View)evt.Arg).getMembers();
ArrayList left_members = new ArrayList();
lock (members)
{
foreach (Address a in members)
{
left_members.Add(a.Copy());
}
members.Clear();
if (new_members != null)
{
members.AddRange(new_members);
}
foreach (Address a in members)
{
if (left_members.Contains(a))
{
left_members.Remove(a);
}
}
foreach (Address oldMbr in left_members)
{
entry = (Entry)connections[oldMbr];
entry.reset();
connections.Remove(oldMbr);
}
}
break;
} // switch
passDown(evt); // Pass on to the layer below us
}