Package jsl.modeling.elements.entity

Class CyclicResourceSelectionRule

java.lang.Object

jsl.modeling.elements.entity.CyclicResourceSelectionRule

All Implemented Interfaces:

ResourceSelectionRuleIfc

public class CyclicResourceSelectionRule
extends java.lang.Object
implements ResourceSelectionRuleIfc

Constructor Summary

Constructors

Constructor	Description
CyclicResourceSelectionRule()

Method Summary

Modifier and Type	Method	Description
void	addAvailableResource(java.util.List<Resource> list, Resource resource)	Places the supplied resource (if resource.hasAvailableUnits()) in the list
Resource	selectAvailableResource(java.util.List<Resource> list)	Selects an available resource or null if none are available The default is to find the first available resource that has the maximum available units.
Resource	selectAvailableResource(java.util.List<Resource> list, int amtNeeded)	Returns the next available resource to be used for allocating to requests, null if none are found that can satisfy the request.

Methods inherited from class java.lang.Object

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

Constructor Detail

CyclicResourceSelectionRule

public CyclicResourceSelectionRule()

Method Detail

selectAvailableResource

public Resource selectAvailableResource(java.util.List<Resource> list,
                                        int amtNeeded)

Returns the next available resource to be used for allocating to requests, null if none are found that can satisfy the request. The default selection method is to cycle through the resources in the order in which they were RELEASED. The idle resource set starts in the order the resources were added to the resource set and assumes that the first resource listed was the resource that was allocated the longest time in the past, and so on. For example, if the set of idle resources has the following list: Resource B Resource A Resource C Then C was the most recently used, resource A the next most recently used, and resource B the oldest used. Resource B will be next allocated, if it can satisfy the amount of the request. If not, Resource A will be checked, and so forth until a resource that can satisfy the request is found. Thus, it is entirely possible that B will not be the next recommended resource. The selected resource is added to the end of the list after it is released. Note that the the order can vary with this list depending on the order in which the resources are released. To provide alternative behavior either override this method, or provide a ResourceSelectionRuleIfc The default behavior is to return the first available resource that can fully supply the amount needed

Specified by:

selectAvailableResource in interface ResourceSelectionRuleIfc

Parameters:

amtNeeded -

Returns:

addAvailableResource

public void addAvailableResource(java.util.List<Resource> list,
                                 Resource resource)

Description copied from interface: ResourceSelectionRuleIfc

Places the supplied resource (if resource.hasAvailableUnits()) in the list

Specified by:

addAvailableResource in interface ResourceSelectionRuleIfc

selectAvailableResource

public Resource selectAvailableResource(java.util.List<Resource> list)

Selects an available resource or null if none are available The default is to find the first available resource that has the maximum available units. To change this either override this method or supply a ResourceSelectionRuleIfc

Specified by:

selectAvailableResource in interface ResourceSelectionRuleIfc

Returns: