gridsim.util
Class TrafficGenerator

Object
  TrafficGenerator

public class TrafficGenerator
extends Object

A generator that tells how many packets sent and how big each packet is for every time interval. This generator is used by Output entity to generate junk packets or some background traffic.

This class uses eduni.simjava.distributions package which is available from SimJava2 only. If you want to use other distribution package, then you need to wrap each source file with either DiscreteGenerator or ContinuousGenerator interface class.

Since:

GridSim Toolkit 3.1

Author:

Anthony Sulistio

See Also:

DiscreteGenerator, ContinuousGenerator

Invariant:

$none

Field Summary

static int	SEND_ALL Sends junk packets to all entities at one time, including resources and/or users
static int	SEND_ONE_ONLY Sends junk packets to one of the entities at one time using a normal distribution from java.util.Random.nextInt(int)

Constructor Summary

TrafficGenerator(ContinuousGenerator freq, ContinuousGenerator timegen)
Creates a new background traffic generator.

TrafficGenerator(ContinuousGenerator freq, DiscreteGenerator timegen)
Creates a new background traffic generator.

TrafficGenerator(DiscreteGenerator freq, ContinuousGenerator timegen)
Creates a new background traffic generator.

TrafficGenerator(DiscreteGenerator freq, DiscreteGenerator timegen)
Creates a new background traffic generator.

Method Summary

long	getNextPacketFreq() Gets the next frequency or number of packets sent for each time.
long	getNextPacketSize() Gets the next packet size.
long	getNextPacketTime() Gets the next inter-arrival time between sending packets.
int	getPattern() Gets the sending packet pattern
int	getServiceType() Gets the service level of this packet.
boolean	setPacketSize(ContinuousGenerator sizegen) Sets the size of each junk packet using a continuous distribution
boolean	setPacketSize(DiscreteGenerator sizegen) Sets the size of each junk packet using a discrete distribution
boolean	setPattern(int pattern) Sets the sending packet pattern if one or more entities are known.
boolean	setServiceType(int type) Sets the service level of this packet.

Methods inherited from class Object

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

Field Detail

SEND_ALL

public static final int SEND_ALL

Sends junk packets to all entities at one time, including resources and/or users

See Also:

Constant Field Values

SEND_ONE_ONLY

public static final int SEND_ONE_ONLY

Sends junk packets to one of the entities at one time using a normal distribution from java.util.Random.nextInt(int)

See Also:

Constant Field Values

Constructor Detail

TrafficGenerator

public TrafficGenerator(DiscreteGenerator freq,
                        DiscreteGenerator timegen)

Creates a new background traffic generator. Each junk packet has a default size (Link.DEFAULT_MTU), a default service type (0), and it will send to all resource entities and users (if applicable) (SEND_ALL).

Parameters:

freq - a generator for frequency or number of packets sent at one time

timegen - a generator for inter-arrival sending time (second)

Pre Condition:

freq != null, timegen != null

Post Condition:

$none

TrafficGenerator

public TrafficGenerator(ContinuousGenerator freq,
                        ContinuousGenerator timegen)

Creates a new background traffic generator. Each junk packet has a default size (Link.DEFAULT_MTU), a default service type (0), and it will send to all resource entities and users (if applicable) (SEND_ALL).

Parameters:

freq - a generator for frequency or number of packets sent at one time

timegen - a generator for inter-arrival sending time (second)

Pre Condition:

freq != null, timegen != null

Post Condition:

$none

TrafficGenerator

public TrafficGenerator(DiscreteGenerator freq,
                        ContinuousGenerator timegen)

Creates a new background traffic generator. Each junk packet has a default size (Link.DEFAULT_MTU), a default service type (0), and it will send to all resource entities and users (if applicable) (SEND_ALL).

Parameters:

freq - a generator for frequency or number of packets sent at one time

timegen - a generator for inter-arrival sending time (second)

Pre Condition:

freq != null, timegen != null

Post Condition:

$none

TrafficGenerator

public TrafficGenerator(ContinuousGenerator freq,
                        DiscreteGenerator timegen)

Creates a new background traffic generator. Each junk packet has a default size (Link.DEFAULT_MTU), a default service type (0), and it will send to all resource entities and users (if applicable) (SEND_ALL).

Parameters:

freq - a generator for frequency or number of packets sent at one time

timegen - a generator for inter-arrival sending time (second)

Pre Condition:

freq != null, timegen != null

Post Condition:

$none

Method Detail

setPattern

public boolean setPattern(int pattern)

Sets the sending packet pattern if one or more entities are known. The pattern is one of the following:

• SEND_ALL: sends to all resources and users (if known)
• SEND_ONE_ONLY: sends to only one of them

Parameters:

pattern -

Returns:

true if successful, false otherwise

Pre Condition:

$none

Post Condition:

$none

getPattern

public int getPattern()

Gets the sending packet pattern

Returns:

packet pattern

Pre Condition:

$none

Post Condition:

$none

setPacketSize

public boolean setPacketSize(ContinuousGenerator sizegen)

Sets the size of each junk packet using a continuous distribution

Parameters:

sizegen - a generator for each packet size

Returns:

true if successful, false otherwise

Pre Condition:

sizegen != null

Post Condition:

$none

setPacketSize

public boolean setPacketSize(DiscreteGenerator sizegen)

Sets the size of each junk packet using a discrete distribution

Parameters:

sizegen - a generator for each packet size

Returns:

true if successful, false otherwise

Pre Condition:

sizegen != null

Post Condition:

$none

getNextPacketTime

public long getNextPacketTime()

Gets the next inter-arrival time between sending packets. For using continuous distribution, the value is rounded up to the nearest integer number.

Returns:

the next inter-arrival time

Pre Condition:

$none

Post Condition:

$none

getNextPacketFreq

public long getNextPacketFreq()

Gets the next frequency or number of packets sent for each time. For using continuous distribution, the value is rounded up to the nearest integer number.

Returns:

frequence or number of packets sent for each time

Pre Condition:

$none

Post Condition:

$none

getNextPacketSize

public long getNextPacketSize()

Gets the next packet size. By default, the packet size is Link.DEFAULT_MTU. For using continuous distribution, the value is rounded up to the nearest integer number.

Returns:

the next packet size

Pre Condition:

$none

Post Condition:

$none

getServiceType

public int getServiceType()

Gets the service level of this packet. By default, the value is 0 (zero).

Returns:

the service level of this packet

Pre Condition:

$none

Post Condition:

$none

setServiceType

public boolean setServiceType(int type)

Sets the service level of this packet.

Parameters:

type - the service level of this packet

Returns:

true if successful, false otherwise

Pre Condition:

type >= 0

Post Condition:

$none