rice.pastry.direct
Class BasicNetworkSimulator

java.lang.Object
  rice.pastry.direct.BasicNetworkSimulator

All Implemented Interfaces:

NetworkSimulator

Direct Known Subclasses:

EuclideanNetwork, GenericNetwork, SphereNetwork

public abstract class BasicNetworkSimulator
extends java.lang.Object
implements NetworkSimulator

Field Summary

protected Logger	logger
protected SelectorManager	manager
protected int	maxDiameter
protected int	MIN_DELAY
protected int	minDelay
protected RandomSource	random

Constructor Summary

BasicNetworkSimulator(Environment env)

Method Summary

boolean	addSimulatorListener(SimulatorListener sl)
ScheduledMessage	deliverMessage(Message msg, DirectPastryNode node) node should always be a local node, because this will be delivered instantly
ScheduledMessage	deliverMessage(Message msg, DirectPastryNode node, int delay) Deliver message.
ScheduledMessage	deliverMessage(Message msg, DirectPastryNode node, int delay, int period) Deliver message.
ScheduledMessage	deliverMessageFixedRate(Message msg, DirectPastryNode node, int delay, int period) Deliver message.
void	destroy(DirectPastryNode node) set the liveliness of a NodeId
CancellableTask	enqueueDelivery(Delivery d, int delay) Deliver message.
DirectNodeHandle	getClosest(DirectNodeHandle nh) find the closest NodeId to an input NodeId out of all NodeIds in the network
Environment	getEnvironment()
TestRecord	getTestRecord() get TestRecord
boolean	isAlive(DirectNodeHandle nh) testing if a NodeId is alive
float	networkDelay(DirectNodeHandle a, DirectNodeHandle b) computes the proximity between two NodeIds
void	notifySimulatorListeners(Message m, NodeHandle from, NodeHandle to, int delay) Call this when a message is sent.
float	proximity(DirectNodeHandle a, DirectNodeHandle b) Determines rtt between two nodes.
void	registerNode(DirectPastryNode dpn) Registers a node handle with the simulator.
void	removeNode(DirectPastryNode node)
boolean	removeSimulatorListener(SimulatorListener sl)
void	setFullSpeed() unlimited maxSpeed
void	setMaxSpeed(float speed) The max rate of the simulator compared to realtime.
void	setTestRecord(TestRecord tr) set TestRecord
void	start()
void	stop()

Methods inherited from class java.lang.Object

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

Methods inherited from interface rice.pastry.direct.NetworkSimulator

generateNodeRecord

Field Detail

logger

protected Logger logger

random

protected RandomSource random

MIN_DELAY

protected int MIN_DELAY

manager

protected SelectorManager manager

maxDiameter

protected final int maxDiameter

minDelay

protected final int minDelay

Constructor Detail

BasicNetworkSimulator

public BasicNetworkSimulator(Environment env)

Method Detail

start

public void start()

Specified by:

start in interface NetworkSimulator

stop

public void stop()

Specified by:

stop in interface NetworkSimulator

getTestRecord

public TestRecord getTestRecord()

get TestRecord

Specified by:

getTestRecord in interface NetworkSimulator

Returns:

the returned TestRecord

setTestRecord

public void setTestRecord(TestRecord tr)

set TestRecord

Specified by:

setTestRecord in interface NetworkSimulator

Parameters:

tr - input TestRecord

enqueueDelivery

public CancellableTask enqueueDelivery(Delivery d,
                                       int delay)

Description copied from interface: NetworkSimulator

Deliver message.

Specified by:

enqueueDelivery in interface NetworkSimulator

deliverMessage

public ScheduledMessage deliverMessage(Message msg,
                                       DirectPastryNode node)

node should always be a local node, because this will be delivered instantly

Specified by:

deliverMessage in interface NetworkSimulator

Parameters:

msg - message to deliver.

node - the Pastry node to deliver it to.

deliverMessage

public ScheduledMessage deliverMessage(Message msg,
                                       DirectPastryNode node,
                                       int delay)

Description copied from interface: NetworkSimulator

Deliver message.

Specified by:

deliverMessage in interface NetworkSimulator

Parameters:

msg - message to deliver.

node - the Pastry node to deliver it to.

deliverMessage

public ScheduledMessage deliverMessage(Message msg,
                                       DirectPastryNode node,
                                       int delay,
                                       int period)

Description copied from interface: NetworkSimulator

Deliver message.

Specified by:

deliverMessage in interface NetworkSimulator

Parameters:

msg - message to deliver.

node - the Pastry node to deliver it to.

period - to deliver the message after the delay

deliverMessageFixedRate

public ScheduledMessage deliverMessageFixedRate(Message msg,
                                                DirectPastryNode node,
                                                int delay,
                                                int period)

Description copied from interface: NetworkSimulator

Deliver message.

Specified by:

deliverMessageFixedRate in interface NetworkSimulator

Parameters:

msg - message to deliver.

node - the Pastry node to deliver it to.

period - to deliver the message after the delay

setMaxSpeed

public void setMaxSpeed(float speed)

Description copied from interface: NetworkSimulator

The max rate of the simulator compared to realtime. The rule is that the simulated clock will not be set to a value greater than the factor from system-time that the call was made. Thus if 1 hour ago, you said the simulator should run at 10x realtime the simulated clock will only have advanced 10 hours. Note that if the simulator cannot keep up with the system clock in the early part, it may move faster than the value you set to "catch up" To prevent this speed-up from becoming unbounded, you may wish to call setMaxSpeed() periodically or immediately after periods of expensive calculations. Setting the simulation speed to zero will not pause the simulation, you must call stop() to do that.

Specified by:

setMaxSpeed in interface NetworkSimulator

setFullSpeed

public void setFullSpeed()

Description copied from interface: NetworkSimulator

unlimited maxSpeed

Specified by:

setFullSpeed in interface NetworkSimulator

isAlive

public boolean isAlive(DirectNodeHandle nh)

testing if a NodeId is alive

Specified by:

isAlive in interface NetworkSimulator

Parameters:

nid - the NodeId being tested

Returns:

true if nid is alive false otherwise

destroy

public void destroy(DirectPastryNode node)

set the liveliness of a NodeId

Specified by:

destroy in interface NetworkSimulator

Parameters:

nid - the NodeId being set

alive - the value being set

networkDelay

public float networkDelay(DirectNodeHandle a,
                          DirectNodeHandle b)

computes the proximity between two NodeIds

Specified by:

networkDelay in interface NetworkSimulator

Parameters:

a - the first NodeId

b - the second NodeId

Returns:

the proximity between the two input NodeIds

proximity

public float proximity(DirectNodeHandle a,
                       DirectNodeHandle b)

Description copied from interface: NetworkSimulator

Determines rtt between two nodes.

Specified by:

proximity in interface NetworkSimulator

Parameters:

a - a node id.

b - another node id.

Returns:

proximity of b to a.

getClosest

public DirectNodeHandle getClosest(DirectNodeHandle nh)

find the closest NodeId to an input NodeId out of all NodeIds in the network

Specified by:

getClosest in interface NetworkSimulator

Parameters:

nid - the input NodeId

Returns:

the NodeId closest to the input NodeId in the network

registerNode

public void registerNode(DirectPastryNode dpn)

Description copied from interface: NetworkSimulator

Registers a node handle with the simulator.

Specified by:

registerNode in interface NetworkSimulator

removeNode

public void removeNode(DirectPastryNode node)

Specified by:

removeNode in interface NetworkSimulator

getEnvironment

public Environment getEnvironment()

Specified by:

getEnvironment in interface NetworkSimulator

addSimulatorListener

public boolean addSimulatorListener(SimulatorListener sl)

Specified by:

addSimulatorListener in interface NetworkSimulator

Returns:

true if added, false if already a listener

removeSimulatorListener

public boolean removeSimulatorListener(SimulatorListener sl)

Specified by:

removeSimulatorListener in interface NetworkSimulator

Returns:

true if removed, false if not already a listener

notifySimulatorListeners

public void notifySimulatorListeners(Message m,
                                     NodeHandle from,
                                     NodeHandle to,
                                     int delay)

Description copied from interface: NetworkSimulator

Call this when a message is sent.

Specified by:

notifySimulatorListeners in interface NetworkSimulator

Parameters:

m - the message

from - the source

to - the destination

delay - the network proximity (when the message will be received)