example.loadbalance
Class BasicBalance

java.lang.Object
  peersim.vector.SingleValueHolder
      example.loadbalance.BasicBalance

All Implemented Interfaces:

java.lang.Cloneable, CDProtocol, Protocol, SingleValue

Direct Known Subclasses:

AvgBalance

public class BasicBalance
extends SingleValueHolder
implements CDProtocol

This class implements a (simple) load balancing strategy: each node selects its most "distant" neighbor in terms of load difference and exchanges with it an amount of load not exceeding the PAR_QUOTA parameter.

The class subclasses SingleValueHolder in order to be type compatible with its observers and initializers object companions.

Parameter Summary

quota
Initial quota.

Field Summary

protected double

quota

Fields inherited from class peersim.vector.SingleValueHolder

value

Constructor Summary

BasicBalance(java.lang.String prefix)
Standard constructor that reads the configuration parameters.

Method Summary

protected void	doTransfer(BasicBalance neighbor) Performs the actual load exchange selecting to make a PUSH or PULL approach.
void	nextCycle(Node node, int protocolID) Using an underlying Linkable protocol choses a neighbor and performs a variance reduction step.
protected void	resetQuota() Resets the current node quota value.

Methods inherited from class peersim.vector.SingleValueHolder

clone, getValue, setValue, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface peersim.core.Protocol

clone

Parameter Detail

quota

Initial quota. Defaults to 1.

Field Detail

quota

protected double quota

Constructor Detail

BasicBalance

public BasicBalance(java.lang.String prefix)

Standard constructor that reads the configuration parameters. Invoked by the simulation engine.

Parameters:

prefix - the configuration prefix for this class.

Method Detail

resetQuota

protected void resetQuota()

Resets the current node quota value.

nextCycle

public void nextCycle(Node node,
                      int protocolID)

Using an underlying Linkable protocol choses a neighbor and performs a variance reduction step.

Specified by:

nextCycle in interface CDProtocol

Parameters:

node - the node on which this component is run.

protocolID - the id of this protocol in the protocol array.

doTransfer

protected void doTransfer(BasicBalance neighbor)

Performs the actual load exchange selecting to make a PUSH or PULL approach. It affects the involved nodes quota.

Parameters:

neighbor - the selected node to talk with. It is assumed that it is an instance of the BasicBalance class.