internal virtual void becomeSingletonMember(Address mbr)
{
Digest initial_digest;
ViewId view_id = null;
ArrayList mbrs = ArrayList.Synchronized(new ArrayList(1));
// set the initial digest (since I'm the first member)
initial_digest = new Digest(1); // 1 member (it's only me)
initial_digest.add(gms.local_addr, 0, 0); // initial seqno mcast by me will be 1 (highest seen +1)
gms.Digest = initial_digest;
view_id = new ViewId(mbr); // create singleton view with mbr as only member
mbrs.Add(mbr);
View v = new View(view_id, mbrs);
v.CoordinatorGmsId = gms.unique_id;
ArrayList subgroupMbrs = new ArrayList();
subgroupMbrs.Add(mbr);
gms._subGroupMbrsMap[gms.subGroup_addr] = subgroupMbrs;
gms._mbrSubGroupMap[mbr] = gms.subGroup_addr;
v.SequencerTbl = gms._subGroupMbrsMap.Clone() as Hashtable;
v.MbrsSubgroupMap = gms._mbrSubGroupMap.Clone() as Hashtable;
v.AddGmsId(mbr, gms.unique_id);
gms.installView(v);
gms.becomeCoordinator(); // not really necessary - installView() should do it
gms.Stack.IsOperational = true;
gms.Stack.NCacheLog.Debug("pb.ClientGmsImpl.becomeSingletonMember()", "created group (first member). My view is " + gms.view_id + ", impl is " + gms.Impl.GetType().FullName);
}
public override void down(Event evt)
{
Message msg;
long time_to_wait, start_time;
switch (evt.Type)
{
case Event.FIND_INITIAL_MBRS: // sent by GMS layer, pass up a GET_MBRS_OK event
//We pass this event down to tcp so that it can take some measures.
passDown(evt);
initial_members.Clear();
msg = new Message(null, null, null);
msg.putHeader(HeaderType.TCPPING, new PingHeader(PingHeader.GET_MBRS_REQ, (System.Object)local_addr, group_addr));
// if intitial nodes have been specified and static is true, then only those
// members will form the cluster, otherwise, nodes having the same IP Multicast and port
// will form the cluster dyanamically.
mbrDiscoveryInProcess = true;
lock (members.SyncRoot)
{
if (initial_hosts != null)
{
for (System.Collections.IEnumerator it = initial_hosts.GetEnumerator(); it.MoveNext();)
{
Address addr = (Address)it.Current;
msg.Dest = addr;
if (Stack.NCacheLog.IsInfoEnabled)
{
Stack.NCacheLog.Info("[FIND_INITIAL_MBRS] sending PING request to " + msg.Dest);
}
passDown(new Event(Event.MSG_URGENT, msg.copy(), Priority.Critical));
}
}
}
// 2. Wait 'timeout' ms or until 'num_initial_members' have been retrieved
if (Stack.NCacheLog.IsInfoEnabled)
{
Stack.NCacheLog.Info("TcpPing.down()", "[FIND_INITIAL_MBRS] waiting for results...............");
}
lock (initial_members.SyncRoot)
{
start_time = (System.DateTime.Now.Ticks - 621355968000000000) / 10000;
time_to_wait = timeout;
while (initial_members.Count < num_initial_members && time_to_wait > 0)
{
try
{
if (Stack.NCacheLog.IsInfoEnabled)
{
Stack.NCacheLog.Info("TcpPing.down()", "initial_members Count: " + initial_members.Count + "initialHosts Count: " + num_initial_members);
}
if (Stack.NCacheLog.IsInfoEnabled)
{
Stack.NCacheLog.Info("TcpPing.down()", "Time to wait for next response: " + time_to_wait);
}
///Big_clusterd: initial members will be pulsed in case connection is not available.
///so here we dont have to wait till each member is timed out.
///this significantly improves time for initial member discovery.
bool timeExpire = System.Threading.Monitor.Wait(initial_members.SyncRoot, TimeSpan.FromMilliseconds(time_to_wait));
}
catch (System.Exception e)
{
Stack.NCacheLog.Error("TCPPing.down(FIND_INITIAL_MBRS)", e.ToString());
}
time_to_wait = timeout - ((System.DateTime.Now.Ticks - 621355968000000000) / 10000 - start_time);
}
mbrDiscoveryInProcess = false;
}
if (Stack.NCacheLog.IsInfoEnabled)
{
Stack.NCacheLog.Info("TcpPing.down()", "[FIND_INITIAL_MBRS] initial members are " + Global.CollectionToString(initial_members));
}
if (Stack.NCacheLog.IsInfoEnabled)
{
Stack.NCacheLog.Info("TcpPing.down()", "[FIND_INITIAL_MBRS] initial members count " + initial_members.Count);
}
//remove those which are not functional due to twoPhaseConnect
for (int i = initial_members.Count - 1; i >= 0; i--)
{
PingRsp rsp = initial_members[i] as PingRsp;
if (!rsp.IsStarted)
{
initial_members.RemoveAt(i);
}
}
// 3. Send response
passUp(new Event(Event.FIND_INITIAL_MBRS_OK, initial_members));
break;
case Event.TMP_VIEW:
case Event.VIEW_CHANGE:
System.Collections.ArrayList tmp;
if ((tmp = ((View)evt.Arg).Members) != null)
{
lock (members.SyncRoot)
{
members.Clear();
members.AddRange(tmp);
}
}
passDown(evt);
break;
/****************************After removal of NackAck *********************************/
//TCPPING emulates a GET_DIGEST call, which is required by GMS. This is needed
//since we have now removed NAKACK from the stack!
case Event.GET_DIGEST:
pbcast.Digest digest = new pbcast.Digest(members.Count);
for (int i = 0; i < members.Count; i++)
{
Address sender = (Address)members[i];
digest.add(sender, 0, 0);
}
passUp(new Event(Event.GET_DIGEST_OK, digest));
return;
case Event.SET_DIGEST:
// Not needed! Just here to let you know that it is needed by GMS!
return;
/********************************************************************************/
case Event.BECOME_SERVER: // called after client has joined and is fully working group member
if (Stack.NCacheLog.IsInfoEnabled)
{
Stack.NCacheLog.Info("TcpPing.down()", "received BECOME_SERVER event");
}
passDown(evt);
is_server = true;
break;
case Event.CONNECT:
object[] addrs = ((object[])evt.Arg);
group_addr = (string)addrs[0];
subGroup_addr = (string)addrs[1];
twoPhaseConnect = (bool)addrs[3];
if (twoPhaseConnect)
{
timeout = 1000;
}
passDown(evt);
break;
case Event.DISCONNECT:
passDown(evt);
break;
case Event.HAS_STARTED:
hasStarted = true;
passDown(evt);
break;
default:
passDown(evt); // Pass on to the layer below us
break;
}
}
internal virtual void becomeSingletonMember(Address mbr)
{
Digest initial_digest;
ViewId view_id = null;
ArrayList mbrs = ArrayList.Synchronized(new ArrayList(1));
// set the initial digest (since I'm the first member)
initial_digest = new Digest(1); // 1 member (it's only me)
initial_digest.add(gms.local_addr, 0, 0); // initial seqno mcast by me will be 1 (highest seen +1)
gms.Digest = initial_digest;
view_id = new ViewId(mbr); // create singleton view with mbr as only member
mbrs.Add(mbr);
View v = new View(view_id, mbrs);
v.CoordinatorGmsId = gms.unique_id;
ArrayList subgroupMbrs = new ArrayList();
subgroupMbrs.Add(mbr);
gms._subGroupMbrsMap[gms.subGroup_addr] = subgroupMbrs;
gms._mbrSubGroupMap[mbr] = gms.subGroup_addr;
v.SequencerTbl = gms._subGroupMbrsMap.Clone() as Hashtable;
v.MbrsSubgroupMap = gms._mbrSubGroupMap.Clone() as Hashtable;
v.AddGmsId(mbr, gms.unique_id);
gms.installView(v);
gms.becomeCoordinator(); // not really necessary - installView() should do it
gms.Stack.IsOperational = true;
gms.Stack.NCacheLog.Debug("pb.ClientGmsImpl.becomeSingletonMember()", "created group (first member). My view is " + gms.view_id + ", impl is " + gms.Impl.GetType().FullName);
}
public override void down(Event evt)
{
Message msg;
long time_to_wait, start_time;
switch (evt.Type)
{
case Event.FIND_INITIAL_MBRS: // sent by GMS layer, pass up a GET_MBRS_OK event
//We pass this event down to tcp so that it can take some measures.
passDown(evt);
initial_members.Clear();
msg = new Message(null, null, null);
msg.putHeader(HeaderType.TCPPING, new PingHeader(PingHeader.GET_MBRS_REQ, (System.Object)local_addr,group_addr));
// if intitial nodes have been specified and static is true, then only those
// members will form the cluster, otherwise, nodes having the same IP Multicast and port
// will form the cluster dyanamically.
mbrDiscoveryInProcess = true;
lock (members.SyncRoot)
{
if( initial_hosts != null)
{
for (System.Collections.IEnumerator it = initial_hosts.GetEnumerator(); it.MoveNext(); )
{
Address addr = (Address) it.Current;
msg.Dest = addr;
if(Stack.NCacheLog.IsInfoEnabled) Stack.NCacheLog.Info("[FIND_INITIAL_MBRS] sending PING request to " + msg.Dest);
passDown(new Event(Event.MSG_URGENT, msg.copy(), Priority.Critical));
}
}
}
// 2. Wait 'timeout' ms or until 'num_initial_members' have been retrieved
if(Stack.NCacheLog.IsInfoEnabled) Stack.NCacheLog.Info("TcpPing.down()", "[FIND_INITIAL_MBRS] waiting for results...............");
lock (initial_members.SyncRoot)
{
start_time = (System.DateTime.Now.Ticks - 621355968000000000) / 10000;
time_to_wait = timeout;
while (initial_members.Count < num_initial_members && time_to_wait > 0)
{
try
{
if (Stack.NCacheLog.IsInfoEnabled) Stack.NCacheLog.Info("TcpPing.down()", "initial_members Count: " + initial_members.Count + "initialHosts Count: " + num_initial_members);
if (Stack.NCacheLog.IsInfoEnabled) Stack.NCacheLog.Info("TcpPing.down()", "Time to wait for next response: " + time_to_wait);
///Big_clusterd: initial members will be pulsed in case connection is not available.
///so here we dont have to wait till each member is timed out.
///this significantly improves time for initial member discovery.
bool timeExpire = System.Threading.Monitor.Wait(initial_members.SyncRoot, TimeSpan.FromMilliseconds(time_to_wait));
}
catch (System.Exception e)
{
Stack.NCacheLog.Error("TCPPing.down(FIND_INITIAL_MBRS)", e.ToString());
}
time_to_wait = timeout - ((System.DateTime.Now.Ticks - 621355968000000000) / 10000 - start_time);
}
mbrDiscoveryInProcess = false;
}
if(Stack.NCacheLog.IsInfoEnabled) Stack.NCacheLog.Info("TcpPing.down()", "[FIND_INITIAL_MBRS] initial members are " + Global.CollectionToString(initial_members));
if(Stack.NCacheLog.IsInfoEnabled) Stack.NCacheLog.Info("TcpPing.down()", "[FIND_INITIAL_MBRS] initial members count " + initial_members.Count);
//remove those which are not functional due to twoPhaseConnect
for (int i = initial_members.Count - 1; i >= 0; i--)
{
PingRsp rsp = initial_members[i] as PingRsp;
if (!rsp.IsStarted) initial_members.RemoveAt(i);
}
// 3. Send response
passUp(new Event(Event.FIND_INITIAL_MBRS_OK, initial_members));
break;
case Event.TMP_VIEW:
case Event.VIEW_CHANGE:
System.Collections.ArrayList tmp;
if ((tmp = ((View) evt.Arg).Members) != null)
{
lock (members.SyncRoot)
{
members.Clear();
members.AddRange(tmp);
}
}
passDown(evt);
break;
/****************************After removal of NackAck *********************************/
//TCPPING emulates a GET_DIGEST call, which is required by GMS. This is needed
//since we have now removed NAKACK from the stack!
case Event.GET_DIGEST:
pbcast.Digest digest = new pbcast.Digest(members.Count);
for (int i = 0; i < members.Count; i++)
{
Address sender = (Address)members[i];
digest.add(sender, 0, 0);
}
passUp(new Event(Event.GET_DIGEST_OK, digest));
return;
case Event.SET_DIGEST:
// Not needed! Just here to let you know that it is needed by GMS!
return;
/********************************************************************************/
case Event.BECOME_SERVER: // called after client has joined and is fully working group member
if(Stack.NCacheLog.IsInfoEnabled) Stack.NCacheLog.Info("TcpPing.down()", "received BECOME_SERVER event");
passDown(evt);
is_server = true;
break;
case Event.CONNECT:
object[] addrs = ((object[])evt.Arg);
group_addr = (string)addrs[0];
subGroup_addr = (string)addrs[1];
twoPhaseConnect = (bool)addrs[3];
if (twoPhaseConnect) timeout = 1000;
passDown(evt);
break;
case Event.DISCONNECT:
passDown(evt);
break;
case Event.HAS_STARTED:
hasStarted = true;
passDown(evt);
break;
default:
passDown(evt); // Pass on to the layer below us
break;
}
}
/// <summary> Computes the new view (including the newly joined member) and get the digest from PBCAST.
/// Returns both in the form of a JoinRsp
/// </summary>
public override JoinRsp handleJoin(Address mbr, string subGroup_name, bool isStartedAsMirror, string gmsId, ref bool acquireHashmap)
{
lock (this)
{
System.Collections.ArrayList new_mbrs = System.Collections.ArrayList.Synchronized(new System.Collections.ArrayList(1));
View v = null;
Digest d, tmp;
gms.Stack.NCacheLog.CriticalInfo("CoordGmsImpl.handleJoin", "mbr=" + mbr);
if (gms.local_addr.Equals(mbr))
{
gms.Stack.NCacheLog.Error("CoordGmsImpl.handleJoin", "cannot join myself !");
return null;
}
if (gms.members.contains(mbr))
{
gms.Stack.NCacheLog.Error("CoordGmsImpl.handleJoin()", "member " + mbr + " already present; returning existing view " + Global.CollectionToString(gms.members.Members));
acquireHashmap = false;
View view = new View(gms.view_id, gms.members.Members);
view.CoordinatorGmsId = gms.unique_id;
JoinRsp rsp = new JoinRsp(view, gms.Digest);
rsp.View.SequencerTbl = gms._subGroupMbrsMap;
rsp.View.MbrsSubgroupMap = gms._mbrSubGroupMap;
return rsp;
// already joined: return current digest and membership
}
new_mbrs.Add(mbr);
//=====================================
// update the subGroupMbrsMap and mbrSubGroupMap
if (gms._subGroupMbrsMap.Contains(subGroup_name))
{
lock (gms._subGroupMbrsMap.SyncRoot)
{
System.Collections.ArrayList groupMbrs = (System.Collections.ArrayList)gms._subGroupMbrsMap[subGroup_name];
if (!groupMbrs.Contains(mbr))
groupMbrs.Add(mbr);
}
}
else
{
lock (gms._subGroupMbrsMap.SyncRoot)
{
System.Collections.ArrayList groupMbrs = new System.Collections.ArrayList();
groupMbrs.Add(mbr);
gms._subGroupMbrsMap[subGroup_name] = groupMbrs;
}
}
if (!gms._mbrSubGroupMap.Contains(mbr))
{
lock (gms._mbrSubGroupMap.SyncRoot)
{
gms._mbrSubGroupMap[mbr] = subGroup_name;
}
}
//=====================================
tmp = gms.Digest; // get existing digest
if (tmp == null)
{
gms.Stack.NCacheLog.Error("CoordGmsImpl.handleJoin", "received null digest from GET_DIGEST: will cause JOIN to fail");
return null;
}
gms.Stack.NCacheLog.Debug("got digest=" + tmp);
d = new Digest(tmp.size() + 1);
// create a new digest, which contains 1 more member
d.add(tmp); // add the existing digest to the new one
d.add(mbr, 0, 0);
// ... and add the new member. it's first seqno will be 1
v = gms.getNextView(new_mbrs, null, null);
v.SequencerTbl = gms._subGroupMbrsMap;
v.MbrsSubgroupMap = gms._mbrSubGroupMap;
v.AddGmsId(mbr, gmsId);
//add coordinator own's gms id[bug fix]; so that new member could know cordinator id
v.AddGmsId(gms.local_addr, gms.unique_id);
if (gms.GmsIds != null)
{
Hashtable gmsIds = gms.GmsIds.Clone() as Hashtable;
IDictionaryEnumerator ide = gmsIds.GetEnumerator();
while (ide.MoveNext())
{
v.AddGmsId((Address)ide.Key,(string) ide.Value);
}
}
gms.Stack.NCacheLog.Debug("joined member " + mbr + ", view is " + v);
return new JoinRsp(v, d);
}
}
