UtilizationModel¶

public interface UtilizationModel¶

The UtilizationModel interface needs to be implemented in order to provide a fine-grained control over resource usage by a Cloudlet. It also implements the Null Object Design Pattern in order to start avoiding NullPointerException when using the UtilizationModel.NULL object instead of attributing null to UtilizationModel variables.

Author:	Anton Beloglazov, Manoel Campos da Silva Filho

Fields¶

NULL¶

UtilizationModel NULL¶: An attribute that implements the Null Object Design Pattern for UtilizationModel objects using a Lambda Expression. A Cloudlet using such a utilization model for one of its resources will not consume any amount of that resource ever.

Methods¶

getSimulation¶

Simulation getSimulation()¶: Gets the simulation that this UtilizationModel belongs to.

getUnit¶

Unit getUnit()¶: Gets the Unit in which the resource utilization is defined.

getUtilization¶

double getUtilization(double time)¶

Gets the expected utilization of resource at a given simulation time. Such a value can be a percentage in scale from [0 to 1] or an absolute value, depending on the getUnit().

It is an expected usage value because the actual resource usage depends on the available resource.

Parameters:	time – the time to get the resource usage.
Returns:	the resource utilization at the given time

See also: .getUnit()

getUtilization¶

double getUtilization()¶

Gets the expected utilization of resource at the current simulation time. Such a value can be a percentage in scale from [0 to 1] or an absolute value, depending on the getUnit().

It is an expected usage value because the actual resource usage depends on the available resource.

Returns:	the current resource utilization

See also: .getUnit()

setSimulation¶

UtilizationModel setSimulation(Simulation simulation)¶

Sets the simulation that this UtilizationModel belongs to.

Parameters:	simulation – the Simulation instance to set