org.gridbus.broker.farming.common.data
Class DataHost

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

Direct Known Subclasses:

SrbDataHost

public class DataHost
extends Server

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 DataHost 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
void	clearFilePaths() Clears all the file paths associated with 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	getEnv() Gets the required environment script for the DataHost, used during job submission.
java.util.Hashtable	getFileList()
java.lang.String	getFilePath(java.lang.String filename) Returns the path of the file on this host specified by the filename
java.lang.String	getFullFilePath(java.lang.String filename) Returns the full path of the file (including the filename) on this host specified by the filename
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	setNetworkService(NetworkStatusService nss) Sets the NetworkStatusService to use for querying information about the network.
void	setRankedservers(java.lang.Object o) Sets the list containing the servers ranked according to total costs
void	setRanks(java.lang.Object o)
void	setRanks(java.lang.Object o, java.lang.String opt) Ranks the compute servers based on the network bandwidth between the compute server and this datahost

Methods inherited from class org.gridbus.broker.farming.common.Server

getHostname, getServerID, setHostname, setServerID

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 DataHost class. The DataHost class represents a node on the grid which is used as a source for reading data. To optimise data transfers, a DataHost can use a NetworkStatusService and calculate the available bandwidth between itself and another Compute node. For this to happen, the NetworkStatusService field of the DataHost has to be set using the setNetworkService() method.

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 -

clearFilePaths

public void clearFilePaths()

Clears all the file paths associated with this datahost

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

setNetworkService

public void setNetworkService(NetworkStatusService nss)

Sets the NetworkStatusService to use for querying information about the network.

Parameters:

nss -

getFullFilePath

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

Returns the full path of the file (including the filename) on this host specified by the filename

Parameters:

filename -

Returns:

string filename

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

Parameters:

o -

Throws:

GridBrokerException

setRanks

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

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

Parameters:

o - - Computeservers to be ranked

opt -

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.

Parameters:

costStr -

o - - Compute server list object

Throws:

java.io.FileNotFoundException

GridBrokerException

See Also:

setCosts(Object)

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

getEnv

public java.lang.String getEnv()

Gets the required environment script for the DataHost, used during job submission.

Returns:

getFileList

public java.util.Hashtable getFileList()

Returns:

Returns the fileList.