algorithm

type ControllerLister interface {
	// Lists all the replication controllers
	List(labels.Selector) ([]*v1.ReplicationController, error)
	// Gets the services for the given pod
	GetPodControllers(*v1.Pod) ([]*v1.ReplicationController, error)
}

type EmptyControllerLister struct{}

type EmptyReplicaSetLister struct{}

type EmptyStatefulSetLister struct{}

type FitPredicate func(pod *v1.Pod, meta PredicateMetadata, nodeInfo *schedulercache.NodeInfo) (bool, []PredicateFailureReason, error)

type GetEquivalencePodFunc func(pod *v1.Pod) interface{}

type MetadataProducer func(pod *v1.Pod, nodeNameToInfo map[string]*schedulercache.NodeInfo) interface{}

type NodeLister interface {
	// We explicitly return []*v1.Node, instead of v1.NodeList, to avoid
	// performing expensive copies that are unneeded.
	List() ([]*v1.Node, error)
}

type PodLister interface {
	// We explicitly return []*v1.Pod, instead of v1.PodList, to avoid
	// performing expensive copies that are unneeded.
	List(labels.Selector) ([]*v1.Pod, error)
	// This is similar to "List()", but the returned slice does not
	// contain pods that don't pass `podFilter`.
	FilteredList(podFilter schedulercache.PodFilter, selector labels.Selector) ([]*v1.Pod, error)
}

type PredicateFailureReason interface {
	GetReason() string
}

type PredicateMetadata interface {
	ShallowCopy() PredicateMetadata
	AddPod(addedPod *v1.Pod, nodeInfo *schedulercache.NodeInfo) error
	RemovePod(deletedPod *v1.Pod) error
}

type PredicateMetadataProducer func(pod *v1.Pod, nodeNameToInfo map[string]*schedulercache.NodeInfo) PredicateMetadata

type PriorityConfig struct {
	Map    PriorityMapFunction
	Reduce PriorityReduceFunction
	// TODO: Remove it after migrating all functions to
	// Map-Reduce pattern.
	Function PriorityFunction
	Weight   int
}

type PriorityFunction func(pod *v1.Pod, nodeNameToInfo map[string]*schedulercache.NodeInfo, nodes []*v1.Node) (schedulerapi.HostPriorityList, error)

type PriorityMapFunction func(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (schedulerapi.HostPriority, error)

type PriorityReduceFunction func(pod *v1.Pod, meta interface{}, nodeNameToInfo map[string]*schedulercache.NodeInfo, result schedulerapi.HostPriorityList) error

type ReplicaSetLister interface {
	// Gets the replicasets for the given pod
	GetPodReplicaSets(*v1.Pod) ([]*extensions.ReplicaSet, error)
}

type ScheduleAlgorithm interface {
	Schedule(*v1.Pod, NodeLister) (selectedMachine string, err error)
	// Preempt receives scheduling errors for a pod and tries to create room for
	// the pod by preempting lower priority pods if possible.
	// It returns the node where preemption happened, a list of preempted pods, and error if any.
	Preempt(*v1.Pod, NodeLister, error) (selectedNode *v1.Node, preemptedPods []*v1.Pod, err error)
	// Predicates() returns a pointer to a map of predicate functions. This is
	// exposed for testing.
	Predicates() map[string]FitPredicate
	// Prioritizers returns a slice of priority config. This is exposed for
	// testing.
	Prioritizers() []PriorityConfig
}

type SchedulerExtender interface {
	// Filter based on extender-implemented predicate functions. The filtered list is
	// expected to be a subset of the supplied list. failedNodesMap optionally contains
	// the list of failed nodes and failure reasons.
	Filter(pod *v1.Pod, nodes []*v1.Node, nodeNameToInfo map[string]*schedulercache.NodeInfo) (filteredNodes []*v1.Node, failedNodesMap schedulerapi.FailedNodesMap, err error)

	// Prioritize based on extender-implemented priority functions. The returned scores & weight
	// are used to compute the weighted score for an extender. The weighted scores are added to
	// the scores computed  by Kubernetes scheduler. The total scores are used to do the host selection.
	Prioritize(pod *v1.Pod, nodes []*v1.Node) (hostPriorities *schedulerapi.HostPriorityList, weight int, err error)

	// Bind delegates the action of binding a pod to a node to the extender.
	Bind(binding *v1.Binding) error

	// IsBinder returns whether this extender is configured for the Bind method.
	IsBinder() bool
}

type ServiceLister interface {
	// Lists all the services
	List(labels.Selector) ([]*v1.Service, error)
	// Gets the services for the given pod
	GetPodServices(*v1.Pod) ([]*v1.Service, error)
}

type StatefulSetLister interface {
	// Gets the StatefulSet for the given pod.
	GetPodStatefulSets(*v1.Pod) ([]*apps.StatefulSet, error)
}