udt
Class UDTSender

java.lang.Object
  udt.UDTSender

public class UDTSender
extends Object

sender part of a UDT entity

See Also:

UDTReceiver

Constructor Summary

UDTSender(UDTSession session, UDPEndPoint endpoint)

Method Summary

long	getCurrentSequenceNumber()
long	getLargestSentSequenceNumber() returns the largest sequence number sent so far
long	getLastAckSequenceNumber() returns the last Ack.
long	getNextSequenceNumber() the next sequence number for data packets.
protected void	handleResubmit(Long seqNumber) re-submits an entry from the sender loss list
protected void	onAcknowledge(Acknowledgement acknowledgement)
protected void	onNAKPacketReceived(NegativeAcknowledgement nak) procedure when a NAK is received (spec.
void	pause()
protected void	putUnacknowledgedPacketsIntoLossList() for processing EXP event (see spec.
protected void	receive(UDTPacket p)
protected void	sendAck2(long ackSequenceNumber)
void	senderAlgorithm()
protected void	sendKeepAlive()
protected boolean	sendUdtPacket(DataPacket p, int timeout, TimeUnit units) writes a data packet into the sendQueue, waiting at most for the specified time if this is not possible due to a full send queue
void	start() start the sender thread
void	stop()
void	waitForAck() wait for the next acknowledge
void	waitForAck(long sequenceNumber) wait until the given sequence number has been acknowledged

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

UDTSender

public UDTSender(UDTSession session,
                 UDPEndPoint endpoint)

Method Detail

start

public void start()

start the sender thread

sendUdtPacket

protected boolean sendUdtPacket(DataPacket p,
                                int timeout,
                                TimeUnit units)
                         throws IOException,
                                InterruptedException

writes a data packet into the sendQueue, waiting at most for the specified time if this is not possible due to a full send queue

Parameters:

p -

timeout -

units -

Returns:

trueif the packet was added, false if the packet could not be added because the queue was full

Throws:

IOException

InterruptedException

receive

protected void receive(UDTPacket p)
                throws IOException

Throws:

IOException

onAcknowledge

protected void onAcknowledge(Acknowledgement acknowledgement)
                      throws IOException

Throws:

IOException

onNAKPacketReceived

protected void onNAKPacketReceived(NegativeAcknowledgement nak)

procedure when a NAK is received (spec. p 14)

Parameters:

nak -

sendKeepAlive

protected void sendKeepAlive()
                      throws Exception

Throws:

Exception

sendAck2

protected void sendAck2(long ackSequenceNumber)
                 throws IOException

Throws:

IOException

senderAlgorithm

public void senderAlgorithm()
                     throws InterruptedException,
                            IOException

Throws:

InterruptedException

IOException

handleResubmit

protected void handleResubmit(Long seqNumber)

re-submits an entry from the sender loss list

Parameters:

entry -

putUnacknowledgedPacketsIntoLossList

protected void putUnacknowledgedPacketsIntoLossList()

for processing EXP event (see spec. p 13)

getNextSequenceNumber

public long getNextSequenceNumber()

the next sequence number for data packets. The initial sequence number is "0"

getCurrentSequenceNumber

public long getCurrentSequenceNumber()

getLargestSentSequenceNumber

public long getLargestSentSequenceNumber()

returns the largest sequence number sent so far

getLastAckSequenceNumber

public long getLastAckSequenceNumber()

returns the last Ack. sequence number

waitForAck

public void waitForAck(long sequenceNumber)
                throws InterruptedException

wait until the given sequence number has been acknowledged

Throws:

InterruptedException

waitForAck

public void waitForAck()
                throws InterruptedException

wait for the next acknowledge

Throws:

InterruptedException

stop

public void stop()

pause

public void pause()