org.gridbus.broker.farming.common
Class DataHost

java.lang.Object
  org.gridbus.broker.farming.common.DataHost

Direct Known Subclasses:

SrbDataHost

public class DataHost

extends java.lang.Object

This class represents a DataHost and its attributes

Version:

1.0, Mar 20, 2003

Author:

Srikumar Venugopal (srikumar@cs.mu.oz.au)

Field Summary

static float	MAX_BW Maximum Bandwidth
static int	MAX_COST Maximum Cost
static float	MIN_BW Minimum Bandwidth
static int	MIN_COST Minimum Cost

Constructor Summary

DataHost(java.lang.String hostname)
Constructor for HEPDataHost class

Method Summary

void	addFilePath(java.lang.String filename, java.lang.String path) Adds a filepath to the list of existing files hosted by this datahost
float	getBandwidth(java.lang.String cs) Returns the bandwidth that was last recorded between this data host and the hostname supplied as argument.
float	getCost(java.lang.String cs) Returns the cost for the network link between this data host and the hostname supplied as argument.
java.lang.String	getFilePath(java.lang.String filename) Returns the path of the file on this host specified by the filename
java.lang.String	getHostname() Returns the hostname.
java.lang.Object	getRankedservers()
boolean	isFilePresent(java.lang.String filename) Returns whether the file specified by the filename exists on this host or not
void	setCosts(java.lang.Object o) Sets the costs for the compute servers randomly between 0 and MAX_COST for this data host and the compute servers in the list
void	setCosts(java.lang.String costStr, java.lang.Object o) Sets the costs for the compute servers after reading from a file specified by COST_FILE in Broker Properties.
void	setRankedservers(java.lang.Object o) Sets the list containing the servers ranked according to total costs
void	setRanks(java.lang.Object o) Ranks the compute servers based on the network bandwidth between the compute server and this datahost

Methods inherited from class java.lang.Object

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

Field Detail

MAX_BW

public static final float MAX_BW

Maximum Bandwidth

See Also:

Constant Field Values

MIN_BW

public static final float MIN_BW

Minimum Bandwidth

See Also:

Constant Field Values

MIN_COST

public static final int MIN_COST

Minimum Cost

See Also:

Constant Field Values

MAX_COST

public static final int MAX_COST

Maximum Cost

See Also:

Constant Field Values

Constructor Detail

DataHost

public DataHost(java.lang.String hostname)

Constructor for HEPDataHost class

Parameters:

hostname -

Method Detail

addFilePath

public void addFilePath(java.lang.String filename,
                        java.lang.String path)

Adds a filepath to the list of existing files hosted by this datahost

Parameters:

filename -

path -

getFilePath

public java.lang.String getFilePath(java.lang.String filename)

Returns the path of the file on this host specified by the filename

Parameters:

filename -

Returns:

string filename

getHostname

public java.lang.String getHostname()

Returns the hostname.

Returns:

String

isFilePresent

public boolean isFilePresent(java.lang.String filename)

Returns whether the file specified by the filename exists on this host or not

Parameters:

filename -

Returns:

boolean

setRanks

public void setRanks(java.lang.Object o)
              throws GridBrokerException

Ranks the compute servers based on the network bandwidth between the compute server and this datahost

Parameters:

o - - Computeservers to be ranked

Throws:

GridBrokerException

setCosts

public void setCosts(java.lang.Object o)

Sets the costs for the compute servers randomly between 0 and MAX_COST for this data host and the compute servers in the list

Parameters:

o - - Compute server list object

setCosts

public void setCosts(java.lang.String costStr,
                     java.lang.Object o)
              throws java.io.FileNotFoundException,
                     GridBrokerException

Sets the costs for the compute servers after reading from a file specified by COST_FILE in Broker Properties. * @see DataHost#setCosts(Object)

Parameters:

costStr -

o - - Compute server list object

Throws:

java.io.FileNotFoundException

GridBrokerException

getRankedservers

public java.lang.Object getRankedservers()

Returns:

rankedServers list

setRankedservers

public void setRankedservers(java.lang.Object o)

Sets the list containing the servers ranked according to total costs

Parameters:

o - - rankedServer list

getBandwidth

public float getBandwidth(java.lang.String cs)
                   throws GridBrokerException

Returns the bandwidth that was last recorded between this data host and the hostname supplied as argument. If the bandwidth to that host is not available, throws Exception

Parameters:

cs - - compute server id

Returns:

bandwidth

Throws:

GridBrokerException

getCost

public float getCost(java.lang.String cs)
              throws GridBrokerException

Returns the cost for the network link between this data host and the hostname supplied as argument. If the cost to that host is not available, throws Exception

Parameters:

cs -

Returns:

cost

Throws:

GridBrokerException