be.ac.ua.broker.input.pricing
Class EC2SpotPriceWatch

java.lang.Object
  be.ac.ua.broker.input.pricing.EC2SpotPriceWatch

All Implemented Interfaces:

PriceWatch

public class EC2SpotPriceWatch
extends java.lang.Object
implements PriceWatch

This class provides access to the EC2 spot prices that are inputted through CSV files to the broker

Author:

Vermeersch Kurt

Field Summary

static java.lang.String

SPOT_INPUT Location of the input files containing the spot price history.

Constructor Summary

EC2SpotPriceWatch()
Constructor for EC2SpotPriceWatch

EC2SpotPriceWatch(java.lang.String inputLocation)
Constructor for EC2SpotPriceWatch

Method Summary

Price	getPrice(InstanceSpecification inst) Getter for the price of the given instance using the pricing model associated with the PriceWatch implementation
SpotPrice	getPrice(InstanceSpecification inst, java.util.Date timestamp) Getter for the price of the given instance at a certain moment in time using the pricing model associated with the PriceWatch implementation
java.lang.String	getPricingModel()
org.apache.commons.math.stat.descriptive.DescriptiveStatistics	getStatisticsSpotPrice(InstanceSpecification inst, java.util.Date start, java.util.Date end) Getter for the spot price history statistics within the given time frame for the given instance specification
SpotPrice	getTippingPointSpotPrice(InstanceSpecification inst, java.util.Date start, java.util.Date end, int index) Getter for the tipping spot bid price such that all task hours can be run on the cheapest spot price hours, the number of hours that can be skipped is given as well as the instance specification and time frame to determine the spot price tipping point for.
void	update() Update the prices that are returned by the PriceWatch implementation, reread prices from CSV files for example

Methods inherited from class java.lang.Object

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

Field Detail

SPOT_INPUT

public static java.lang.String SPOT_INPUT

Location of the input files containing the spot price history.

Constructor Detail

EC2SpotPriceWatch

public EC2SpotPriceWatch()

Constructor for EC2SpotPriceWatch

EC2SpotPriceWatch

public EC2SpotPriceWatch(java.lang.String inputLocation)

Constructor for EC2SpotPriceWatch

Parameters:

inputLocation - the location of the input files containing the spot price history.

Method Detail

getPrice

public Price getPrice(InstanceSpecification inst)
               throws InstanceNotAvailableException

Description copied from interface: PriceWatch

Getter for the price of the given instance using the pricing model associated with the PriceWatch implementation

Specified by:

getPrice in interface PriceWatch

Parameters:

inst - the instance specification to get the price for

Returns:

the price for the given instance

Throws:

InstanceNotAvailableException

update

public void update()

Description copied from interface: PriceWatch

Update the prices that are returned by the PriceWatch implementation, reread prices from CSV files for example

Specified by:

update in interface PriceWatch

getPricingModel

public java.lang.String getPricingModel()

Specified by:

getPricingModel in interface PriceWatch

Returns:

name of the pricing model this access point was created for

getPrice

public SpotPrice getPrice(InstanceSpecification inst,
                          java.util.Date timestamp)
                   throws InstanceNotAvailableException

Description copied from interface: PriceWatch

Getter for the price of the given instance at a certain moment in time using the pricing model associated with the PriceWatch implementation

Specified by:

getPrice in interface PriceWatch

Parameters:

inst - the instance specification to get the price for

timestamp - time to get the price for

Returns:

the price for the given instance at the given moment in time

Throws:

InstanceNotAvailableException

getStatisticsSpotPrice

public org.apache.commons.math.stat.descriptive.DescriptiveStatistics getStatisticsSpotPrice(InstanceSpecification inst,
                                                                                             java.util.Date start,
                                                                                             java.util.Date end)
                                                                                      throws InstanceNotAvailableException

Getter for the spot price history statistics within the given time frame for the given instance specification

Parameters:

inst - the instance specification to get the spot price statistics for

start - the start date of the time frame to get the spot price statistics for

end - the end date of the time frame to get the spot price statistics for

Returns:

the spot price statistics that were requested for a certain instance specification and time frame

Throws:

InstanceNotAvailableException

getTippingPointSpotPrice

public SpotPrice getTippingPointSpotPrice(InstanceSpecification inst,
                                          java.util.Date start,
                                          java.util.Date end,
                                          int index)
                                   throws InstanceNotAvailableException

Getter for the tipping spot bid price such that all task hours can be run on the cheapest spot price hours, the number of hours that can be skipped is given as well as the instance specification and time frame to determine the spot price tipping point for.

Parameters:

inst - the instance specification to get the bid spot price for

start - the start date of the time interval to get the bid spot price for

end - the end date of the time interval to get the bid spot price for

index - the number of hours that can be skipped, the spot instance does not need to be in use

Returns:

the appropriate spot bid price

Throws:

InstanceNotAvailableException