Package org.cloudbus.cloudsim.resources

Interface Resource

All Superinterfaces:

ResourceCapacity

All Known Subinterfaces:

FileStorage, Pe, ResourceManageable

All Known Implementing Classes:

Bandwidth, HarddriveStorage, PeSimple, Processor, Ram, ResourceAbstract, ResourceManageableAbstract, SanStorage, Storage

public interface Resource
extends ResourceCapacity

An interface to represent a physical or virtual resource (like RAM, CPU or Bandwidth) that doesn't provide direct features to change allocated amount of resource. Objects that directly implement this interface are supposed to define the capacity and amount of allocated resource in their constructors.

Since:

CloudSim Plus 1.0

Author:

Uros Cibej, Anthony Sulistio, Manoel Campos da Silva Filho

Field Summary

Fields

Modifier and Type	Field	Description
static Resource	NULL	An attribute that implements the Null Object Design Pattern for Resource objects.

Method Summary

Modifier and Type	Method	Description
long	getAllocatedResource()	Gets the current total amount of allocated resource.
long	getAvailableResource()	Gets the amount of the resource that is available (free).
default double	getPercentUtilization()	Gets the current percentage of resource utilization in scale from 0 to 1.
default boolean	isAmountAvailable(double amountToCheck)	Checks if there is a specific amount of resource available (free), where such amount is a double value that will be converted to long.
boolean	isAmountAvailable(long amountToCheck)	Checks if there is a specific amount of resource available (free).
default boolean	isAmountAvailable(Resource resource)	Checks if there the capacity required for the given resource is available (free) at this resource.
default boolean	isFull()	Checks if the resource is full or not.
default boolean	isObjectSubClassOf(java.lang.Class classWanted)	Checks if this object is instance of a given class.
static boolean	isObjectSubClassOf(java.lang.Object object, java.lang.Class classWanted)	Checks if a given object is instance of a given class.

Methods inherited from interface org.cloudbus.cloudsim.resources.ResourceCapacity

getCapacity

Field Detail

NULL

static final Resource NULL

An attribute that implements the Null Object Design Pattern for Resource objects.

Method Detail

isObjectSubClassOf

static boolean isObjectSubClassOf(java.lang.Object object,
                                  java.lang.Class classWanted)

Checks if a given object is instance of a given class.

Parameters:

object - the object to check

classWanted - the class to verify if the object is instance of

Returns:

true if the object is instance of the given class, false otherwise

isObjectSubClassOf

default boolean isObjectSubClassOf(java.lang.Class classWanted)

Checks if this object is instance of a given class.

Parameters:

classWanted - the class to verify if the object is instance of

Returns:

true if the object is instance of the given class, false otherwise

getAvailableResource

long getAvailableResource()

Gets the amount of the resource that is available (free).

Returns:

the amount of available resource

getAllocatedResource

long getAllocatedResource()

Gets the current total amount of allocated resource.

Returns:

amount of allocated resource

isAmountAvailable

default boolean isAmountAvailable(Resource resource)

Checks if there the capacity required for the given resource is available (free) at this resource. This method is commonly used to check if there is a specific amount of resource free at a physical resource (this Resource instance) that is required by a virtualized resource (the given Resource).

Parameters:

resource - the resource to check if its capacity is available at the current resource

Returns:

true if the capacity required by the given Resource is free; false otherwise

See Also:

isAmountAvailable(long)

isAmountAvailable

boolean isAmountAvailable(long amountToCheck)

Checks if there is a specific amount of resource available (free).

Parameters:

amountToCheck - the amount of resource to check if is free.

Returns:

true if the specified amount is free; false otherwise

isAmountAvailable

default boolean isAmountAvailable(double amountToCheck)

Checks if there is a specific amount of resource available (free), where such amount is a double value that will be converted to long.

This method is just a shorthand to avoid explicitly converting a double to long.

Parameters:

amountToCheck - the amount of resource to check if is free.

Returns:

true if the specified amount is free; false otherwise

See Also:

isAmountAvailable(long)

isFull

default boolean isFull()

Checks if the resource is full or not.

Returns:

true if the storage is full, false otherwise

getPercentUtilization

default double getPercentUtilization()

Gets the current percentage of resource utilization in scale from 0 to 1. It is the percentage of the total resource capacity that is currently allocated.

Returns:

current resource utilization (allocation) percentage in scale from 0 to 1