es.ants.felixgm.trmsim_wsn.trm.eigentrust
Class EigenTrust_Sensor

java.lang.Object
  es.ants.felixgm.trmsim_wsn.network.Sensor
      es.ants.felixgm.trmsim_wsn.trm.eigentrust.EigenTrust_Sensor

All Implemented Interfaces:

java.lang.Runnable

public class EigenTrust_Sensor
extends Sensor

This class models a Sensor implementing EigenTrust

Since:

0.2

Version:

0.3

Author:

Félix Gómez Mármol, Gregorio Martínez Pérez and Antonio Bernárdez

Field Summary

protected static int	_numSensors Number of sensors composing the network this sensor belongs to
protected static double[]	_preTrustedPeersVector Vector p
protected static int	_windowSize Window size for storing transactions outcomes
protected double[]	globalTrustVector Vector t
protected java.util.Collection<EigenTrust_Sensor>	interactedServers Collection of severs who this sensor has interacted with
protected boolean	isPreTrustedPeer Indicates if this sensor is a pre-trusted peer (true) or not (false)
protected java.util.Collection<Transaction>	transactions Collection of Transactions this sensor has had

Fields inherited from class es.ants.felixgm.trmsim_wsn.network.Sensor

_maxDistance, activeState, collusion, dynamic, id, idCount, links, numRequests, numRequestsThreshold, numRequestsTimer, outcome, requiredService, runningSimulation, servicesGoodness, sleepTimer, sleepTimerAux, transmittedDistance, trmmodelWSN, xPosition, yPosition

Constructor Summary

EigenTrust_Sensor()
This constructor creates a new Sensor implementing EigenTrust

EigenTrust_Sensor(int id, double x, double y)
This constructor creates a new Sensor implementing EigenTrust

Method Summary

void	addNewTransaction(EigenTrust_Sensor client, EigenTrust_Sensor server, Outcome outcome) This method adds a new Transaction to the collection of transactions of this sensor
double[]	get_globalTrustVector() Returns the current global trust vector t_i^k
static double[]	get_preTrustedPeersVector() Returns the current pre-trusted peers vector p
double	getNormalizedLocalTrustValue(EigenTrust_Sensor server) This method computes the normalized local trust value c_{ij}\in[0,1]
static int	getNumSensors() Returns the number of sensors composing the network this sensor belongs to
boolean	isPreTrustedPeer() Indicates if this sensor is a pre-trusted peer (true) or not (false)
void	reset() This method resets a Sensor to its initial state
void	set_globalTrustVector(double[] globalTrustVector) Sets the new global trust vector t_i^{k+1}
static void	set_preTrustedPeersVector(double[] preTrustedPeersVector) Sets the new pre-trusted peers vector p
static void	set_windowSize(int windowSize) Sets the window size for storing transactions outcomes
static void	setNumSensors(int numSensors) Sets the number of sensors composing the network this sensor belongs to
void	setPreTrustedPeer(boolean isPreTrustedPeer) Sets this senor as a pre-trusted peer or not

Methods inherited from class es.ants.felixgm.trmsim_wsn.network.Sensor

addLink, addService, addTransmittedDistance, cancelAllTimers, distance, distanceInHops, equals, findSensors, get_goodness, get_numServices, get_outcome, get_requiredService, get_services, get_transmittedDistance, get_TRModel_WSN, getNeighbors, getService, getX, getY, id, isActive, isNeighbor, isRunningSimulation, offersService, offersService, removeAllNeighbors, removeLink, removeService, resetId, run, serve, set_goodness, set_requiredService, set_TRModel_WSN, setActiveState, setCollusion, setDynamic, setMaxDistance, setRunningSimulation, toString

Methods inherited from class java.lang.Object

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

Field Detail

_numSensors

protected static int _numSensors

Number of sensors composing the network this sensor belongs to

_windowSize

protected static int _windowSize

Window size for storing transactions outcomes

transactions

protected java.util.Collection<Transaction> transactions

Collection of Transactions this sensor has had

globalTrustVector

protected double[] globalTrustVector

Vector t

_preTrustedPeersVector

protected static double[] _preTrustedPeersVector

Vector p

interactedServers

protected java.util.Collection<EigenTrust_Sensor> interactedServers

Collection of severs who this sensor has interacted with

isPreTrustedPeer

protected boolean isPreTrustedPeer

Indicates if this sensor is a pre-trusted peer (true) or not (false)

Constructor Detail

EigenTrust_Sensor

public EigenTrust_Sensor()

This constructor creates a new Sensor implementing EigenTrust

EigenTrust_Sensor

public EigenTrust_Sensor(int id,
                         double x,
                         double y)

This constructor creates a new Sensor implementing EigenTrust

Parameters:

id - Identifier of the new sensor

x - X coordinate of the new sensor

y - Y coordinate of the new sensor

Method Detail

getNormalizedLocalTrustValue

public double getNormalizedLocalTrustValue(EigenTrust_Sensor server)

This method computes the normalized local trust value c_{ij}\in[0,1]

Parameters:

server - Server j

Returns:

c_{ij}

addNewTransaction

public void addNewTransaction(EigenTrust_Sensor client,
                              EigenTrust_Sensor server,
                              Outcome outcome)

This method adds a new Transaction to the collection of transactions of this sensor

Parameters:

client - The client who requested the service

server - The server who provided the service

outcome - Outcome of the trnsaction to be added

reset

public void reset()

Description copied from class: Sensor

This method resets a Sensor to its initial state

Specified by:

reset in class Sensor

set_globalTrustVector

public void set_globalTrustVector(double[] globalTrustVector)

Sets the new global trust vector t_i^{k+1}

Parameters:

globalTrustVector - New global trust vector t_i^{k+1}

get_globalTrustVector

public double[] get_globalTrustVector()

Returns the current global trust vector t_i^k

Returns:

The current global trust vector t_i^k

set_preTrustedPeersVector

public static void set_preTrustedPeersVector(double[] preTrustedPeersVector)

Sets the new pre-trusted peers vector p

Parameters:

preTrustedPeersVector - New pre-trusted peers vector p

get_preTrustedPeersVector

public static double[] get_preTrustedPeersVector()

Returns the current pre-trusted peers vector p

Returns:

The current pre-trusted peers vector p

getNumSensors

public static int getNumSensors()

Returns the number of sensors composing the network this sensor belongs to

Returns:

The number of sensors composing the network this sensor belongs to

isPreTrustedPeer

public boolean isPreTrustedPeer()

Indicates if this sensor is a pre-trusted peer (true) or not (false)

Returns:

true if this sensor is a pre-trusted peer, false otherwise

setNumSensors

public static void setNumSensors(int numSensors)

Sets the number of sensors composing the network this sensor belongs to

Parameters:

numSensors - The number of sensors composing the network this sensor belongs to

set_windowSize

public static void set_windowSize(int windowSize)

Sets the window size for storing transactions outcomes

Parameters:

windowSize - New window size for storing transactions outcomes

setPreTrustedPeer

public void setPreTrustedPeer(boolean isPreTrustedPeer)

Sets this senor as a pre-trusted peer or not

Parameters:

isPreTrustedPeer - true if this sensor is to be a pre-trusted peer, false otherwise