public UpHandler(Alachisoft.NCache.Common.DataStructures.Queue mq, Protocol handler, string name, int id)
{
this.mq = mq;
this.handler = handler;
if(name != null)
Name = name;
IsBackground = true;
this.id = id;
}
public virtual void stopProtocolStack(Protocol start_prot)
{
while (start_prot != null)
{
start_prot.stopInternal();
start_prot.destroy();
start_prot = start_prot.DownProtocol;
}
}
public virtual void startProtocolStack(Protocol bottom_prot)
{
while (bottom_prot != null)
{
bottom_prot.startDownHandler();
bottom_prot.startUpHandler();
bottom_prot = bottom_prot.UpProtocol;
}
}
public UpHandler(Alachisoft.NCache.Common.DataStructures.Queue mq, Protocol handler)
{
this.mq = mq;
this.handler = handler;
if (handler != null)
{
Name = "UpHandler (" + handler.Name + ')';
}
else
{
Name = "UpHandler";
}
IsBackground = true;
}
/// <summary> This constructor whould be used when we want AckSenderWindow to send the message added
/// by add(), rather then ourselves.
/// </summary>
public AckSenderWindow(AckSenderWindow.RetransmitCommand com, long[] interval, Protocol transport, ILogger NCacheLog)
{
//this.nTrace = nTrace;
_ncacheLog = NCacheLog;
InitBlock();
retransmit_command = com;
this.interval = interval;
this.transport = transport;
retransmitter.RetransmitTimeouts = interval;
}
public override void stop()
{
isClosing = true;
local_addr = null;
if (_asyncProcessor != null)
_asyncProcessor.Stop();
_asyncProcessor = null;
if (_keepAlive != null) _keepAlive.Stop();
ct.stop();
upper = null;
}
public override void start()
{
// Incase of TCP stack we'll get a reference to TOTAL, which is the top
// protocol in our case.
upper = Stack.findProtocol("TOTAL");
ct = getConnectionTable(reaper_interval, conn_expire_time, bind_addr1, bind_addr2, start_port, _retries, _retryInterval);
ct.addConnectionListener(this);
ct.ReceiveBufferSize = recv_buf_size;
ct.SendBufferSize = send_buf_size;
local_addr = ct.LocalAddress;
if (additional_data != null /*&& local_addr is Address*/)
((Address)local_addr).AdditionalData = additional_data;
passUp(new Event(Event.SET_LOCAL_ADDRESS, local_addr, Priority.Critical));
_asyncProcessor = new AsyncProcessor(stack.NCacheLog);
_asyncProcessor.Start();
_keepAlive = new ConnectionKeepAlive(this, ct, _heartBeatInterval);
if (_useKeepAlive)
_keepAlive.Start();
Stack.NCacheLog.CriticalInfo("TCP.start", "operating parameters -> [ heart_beat:" + _useKeepAlive + " ;heart_beat_interval: " + _heartBeatInterval + " ;async_up_deliver: " + asyncPassup + " ;connection_retries: " + _retries + " ;connection_retry_interval: " + _retryInterval + " ]");
}
/// <summary> Handle the stop() method travelling down the stack.
/// <p>
/// The local addr is set to null, since after a Start->Stop->Start
/// sequence this member's addr is not guaranteed to be the same
///
/// </summary>
public override void stop()
{
// *** Get an exclusive lock
try
{
stateLock.AcquireWriterLock(Timeout.Infinite);
try
{
state = NULL_STATE;
retransmitter.reset();
_mcastRetransmitter.reset();
reqTbl.Clear();
upTbl.Clear();
addr = null;
// *** Revoke the exclusive lock
}
finally
{
stateLock.ReleaseWriterLock();
transport = null;
}
}
catch (ThreadInterruptedException ex)
{
Stack.NCacheLog.Error("Protocols.TOTAL.stop", ex.ToString());
}
}
/// <summary> Prepare this layer to receive messages from above</summary>
public override void start()
{
TimeScheduler timer;
// Incase of TCP stack we'll get a reference to TCP, which is the transport
// protocol in our case. For udp stack we'll fail.
transport = Stack.findProtocol("TCP");
reqTbl = Hashtable.Synchronized(new Hashtable());
upTbl = Hashtable.Synchronized(new Hashtable());
//======================================================
_mcastReqTbl = Hashtable.Synchronized(new Hashtable());
_mcastUpTbl = Hashtable.Synchronized(new Hashtable());
//======================================================
retransmitter = new AckSenderWindow(new Command(this), AVG_RETRANSMIT_INTERVAL, stack.NCacheLog);
_mcastRetransmitter = new AckSenderWindow(new MCastCommand(this), AVG_MCAST_RETRANSMIT_INTERVAL, stack.NCacheLog);
}
public override void destroy()
{
if (top_prot != null)
{
conf.stopProtocolStack(top_prot); // destroys msg queues and threads
if (perfStatsColl != null) perfStatsColl.Dispose();
top_prot = null;
}
}
/// <summary> Inserts an already created (and initialized) protocol into the protocol list. Sets the links
/// to the protocols above and below correctly and adjusts the linked list of protocols accordingly.
/// Note that this method may change the value of top_prot or bottom_prot.
/// </summary>
/// <param name="prot">The protocol to be inserted. Before insertion, a sanity check will ensure that none
/// of the existing protocols have the same name as the new protocol.
/// </param>
/// <param name="position">Where to place the protocol with respect to the neighbor_prot (ABOVE, BELOW)
/// </param>
/// <param name="neighbor_prot">The name of the neighbor protocol. An exception will be thrown if this name
/// is not found
/// </param>
/// <exception cref=""> Exception Will be thrown when the new protocol cannot be created, or inserted.
/// </exception>
public virtual void insertProtocol(Protocol prot, int position, string neighbor_prot)
{
conf.insertProtocol(prot, position, neighbor_prot, this);
}
public virtual void setup()
{
if (top_prot == null)
{
top_prot = conf.setupProtocolStack(setup_string, this);
if (top_prot == null)
throw new System.Exception("ProtocolStack.setup(): couldn't create protocol stack");
top_prot.UpProtocol = this;
bottom_prot = conf.getBottommostProtocol(top_prot);
conf.startProtocolStack(bottom_prot); // sets up queues and threads
}
}
public virtual Protocol findProtocol(Protocol prot_stack, string name)
{
string s;
Protocol curr_prot = prot_stack;
while (true)
{
s = curr_prot.Name;
if (s == null)
continue;
if (s.Equals(name))
return curr_prot;
curr_prot = curr_prot.DownProtocol;
if (curr_prot == null)
break;
}
return null;
}
/// <summary> Inserts an already created (and initialized) protocol into the protocol list. Sets the links
/// to the protocols above and below correctly and adjusts the linked list of protocols accordingly.
/// </summary>
/// <param name="prot"> The protocol to be inserted. Before insertion, a sanity check will ensure that none
/// of the existing protocols have the same name as the new protocol.
/// </param>
/// <param name="position">Where to place the protocol with respect to the neighbor_prot (ABOVE, BELOW)
/// </param>
/// <param name="neighbor_prot">The name of the neighbor protocol. An exception will be thrown if this name
/// is not found
/// </param>
/// <param name="stack">The protocol stack
/// </param>
/// <exception cref=""> Exception Will be thrown when the new protocol cannot be created, or inserted.
/// </exception>
public virtual void insertProtocol(Protocol prot, int position, string neighbor_prot, ProtocolStack stack)
{
if (neighbor_prot == null)
throw new System.Exception("Configurator.insertProtocol(): neighbor_prot is null");
if (position != ProtocolStack.ABOVE && position != ProtocolStack.BELOW)
throw new System.Exception("Configurator.insertProtocol(): position has to be ABOVE or BELOW");
// find the neighbors below and above
// connect to the protocol layer below and above
}
public virtual Protocol getBottommostProtocol(Protocol prot_stack)
{
Protocol tmp = null, curr_prot = prot_stack;
while (true)
{
if ((tmp = curr_prot.DownProtocol) == null)
break;
curr_prot = tmp;
}
return curr_prot;
}
