core
Class CBRConnection

java.lang.Object
  core.Connection
      core.CBRConnection

public class CBRConnection
extends Connection

A constant bit-rate connection between two DTN nodes.

Field Summary

Fields inherited from class core.Connection

bytesTransferred, fromInterface, fromNode, msgFromNode, msgOnFly, toInterface, toNode

Constructor Summary

CBRConnection(DTNHost fromNode, NetworkInterface fromInterface, DTNHost toNode, NetworkInterface toInterface, int connectionSpeed)
Creates a new connection between nodes and sets the connection state to "up".

Method Summary

void	abortTransfer() Aborts the transfer of the currently transferred message.
int	getRemainingByteCount() Returns the amount of bytes to be transferred before ongoing transfer is ready or 0 if there's no ongoing transfer or it has finished already
double	getSpeed() returns the current speed of the connection
double	getTransferDoneTime() Gets the transferdonetime
boolean	isMessageTransferred() Returns true if the current message transfer is done.
int	startTransfer(DTNHost from, Message m) Sets a message that this connection is currently transferring.
java.lang.String	toString() Returns a String presentation of the connection.

Methods inherited from class core.Connection

clearMsgOnFly, finalizeTransfer, getMessage, getOtherInterface, getOtherNode, getTotalBytesTransferred, isInitiator, isReadyForTransfer, isUp, setUpState, update

Methods inherited from class java.lang.Object

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

Constructor Detail

CBRConnection

public CBRConnection(DTNHost fromNode,
                     NetworkInterface fromInterface,
                     DTNHost toNode,
                     NetworkInterface toInterface,
                     int connectionSpeed)

Creates a new connection between nodes and sets the connection state to "up".

Parameters:

fromNode - The node that initiated the connection

fromInterface - The interface that initiated the connection

toNode - The node in the other side of the connection

toInterface - The interface in the other side of the connection

connectionSpeed - Transfer speed of the connection (Bps) when the connection is initiated

Method Detail

startTransfer

public int startTransfer(DTNHost from,
                         Message m)

Sets a message that this connection is currently transferring. If message passing is controlled by external events, this method is not needed (but then e.g. Connection.finalizeTransfer() and isMessageTransferred() will not work either). Only a one message at a time can be transferred using one connection.

Specified by:

startTransfer in class Connection

Parameters:

from - The host sending the message

m - The message

Returns:

The value returned by MessageRouter.receiveMessage(Message, DTNHost)

abortTransfer

public void abortTransfer()

Aborts the transfer of the currently transferred message.

Overrides:

abortTransfer in class Connection

getTransferDoneTime

public double getTransferDoneTime()

Gets the transferdonetime

isMessageTransferred

public boolean isMessageTransferred()

Returns true if the current message transfer is done.

Specified by:

isMessageTransferred in class Connection

Returns:

True if the transfer is done, false if not

getSpeed

public double getSpeed()

returns the current speed of the connection

Specified by:

getSpeed in class Connection

getRemainingByteCount

public int getRemainingByteCount()

Returns the amount of bytes to be transferred before ongoing transfer is ready or 0 if there's no ongoing transfer or it has finished already

Specified by:

getRemainingByteCount in class Connection

Returns:

the amount of bytes to be transferred

toString

public java.lang.String toString()

Returns a String presentation of the connection.

Overrides:

toString in class Connection