ikr.simlib.entities.queues

Class BoundedLIFOQueue

java.lang.Object

ikr.simlib.entities.Entity

ikr.simlib.entities.queues.Queue

ikr.simlib.entities.queues.LIFOQueue

ikr.simlib.entities.queues.BoundedLIFOQueue

public class BoundedLIFOQueue
extends LIFOQueue

This class implements a bounded LIFO (Last In First Out) queue, i.e., it has a finite buffer size. If a new message arrives and there is not enough buffer space left in the queue to store the message, messages are deleted from the head of the queue until there is enough buffer space in the drop-head queue to hold the new message. The messages are deleted by the HandleLossMessage()-method. You can overwrite this virtual method if you want something else to be done with the message. If the arriving message is larger than the maximum available buffer space in the queue, then it is discarded immediately and no messages within the queue are deleted.

Nested Class Summary

Nested classes/interfaces inherited from class ikr.simlib.entities.queues.Queue

Queue.QueueEntry

Nested classes/interfaces inherited from class ikr.simlib.entities.Entity

Entity.PortAlias

Field Summary

Fields

Modifier and Type	Field and Description
protected int	maxSizeInUnits

Fields inherited from class ikr.simlib.entities.queues.Queue

currentNumberOfUnits, inputPort, lossProbability, numberOfMessages, numberOfUnits, outputPort, transferTime, waitingTime

Fields inherited from class ikr.simlib.entities.Entity

portAliases, ports, simNode

Constructor Summary

Constructors

Constructor and Description
BoundedLIFOQueue(int size, java.lang.String name, SimNode owner)

Method Summary

Methods

Modifier and Type	Method and Description
int	getMaxSizeInUnits()
boolean	isFull(Message msg)

Methods inherited from class ikr.simlib.entities.queues.LIFOQueue

get, getCurrentNumberOfMessages, getCurrentNumberOfUnits, handleMessageIndication, isEmpty, put

Methods inherited from class ikr.simlib.entities.queues.Queue

getInput, getOutput, handleGetMessage, handleIsMessageAvailable, handleLossMessage

Methods inherited from class ikr.simlib.entities.Entity

addPort, aliasPort, aliasPort, connect, disconnect, getName, getNode, getPortByName, getPorts, isPortKnown, unaliasPort

Methods inherited from class java.lang.Object

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

Field Detail

maxSizeInUnits

protected int maxSizeInUnits

Constructor Detail

BoundedLIFOQueue

public BoundedLIFOQueue(int size,
                java.lang.String name,
                SimNode owner)

Method Detail

isFull

public boolean isFull(Message msg)

Specified by:

isFull in class Queue

Returns:

true if the queue cannot store the given message due to its bounded buffer size.

getMaxSizeInUnits

public int getMaxSizeInUnits()

Overrides:

getMaxSizeInUnits in class LIFOQueue

Returns:

maximum size of queue or Integer.MAX_VALUE if queue is unbounded.