apiVersion: v1
kind: Endpoints
metadata:
  annotations:
    annotationsKey: annotationsValue
  creationTimestamp: "2008-01-01T01:01:01Z"
  deletionGracePeriodSeconds: 10
  deletionTimestamp: "2009-01-01T01:01:01Z"
  finalizers:
  - finalizersValue
  generateName: generateNameValue
  generation: 7
  labels:
    labelsKey: labelsValue
  managedFields:
  - apiVersion: apiVersionValue
    fieldsType: fieldsTypeValue
    fieldsV1: {}

apiVersion: v1
kind: Endpoints
metadata:
  creationTimestamp: '2016-10-04T17:45:58Z'
  labels:
    app: my-app
  name: app-server
  namespace: default
  resourceVersion: '184597135'
  selfLink: /self/link
  uid: 6826f086-8a5a-11e6-8d09-42010a800005
subsets:
- addresses:
  - ip: 10.0.0.1
    targetRef:
      kind: Pod
      name: pod-name-1234-0000
      namespace: default
      resourceVersion: '1234567890'

{
  "kind": "Endpoints",
  "apiVersion": "v1",
  "metadata": {
    "name": "nameValue",
    "generateName": "generateNameValue",
    "namespace": "namespaceValue",
    "selfLink": "selfLinkValue",
    "uid": "uidValue",
    "resourceVersion": "resourceVersionValue",
    "generation": 7,
    "creationTimestamp": "2008-01-01T01:01:01Z",
    "deletionTimestamp": "2009-01-01T01:01:01Z",
    "deletionGracePeriodSeconds": 10,
    "labels": {

apiVersion: v1
kind: Endpoints
metadata:
  annotations:
    annotationsKey: annotationsValue
  creationTimestamp: "2008-01-01T01:01:01Z"
  deletionGracePeriodSeconds: 10
  deletionTimestamp: "2009-01-01T01:01:01Z"
  finalizers:
  - finalizersValue
  generateName: generateNameValue
  generation: 7
  labels:
    labelsKey: labelsValue
  managedFields:
  - apiVersion: apiVersionValue
    fieldsType: fieldsTypeValue
    fieldsV1: {}

{
  "kind": "Endpoints",
  "apiVersion": "v1",
  "metadata": {
    "name": "nameValue",
    "generateName": "generateNameValue",
    "namespace": "namespaceValue",
    "selfLink": "selfLinkValue",
    "uid": "uidValue",
    "resourceVersion": "resourceVersionValue",
    "generation": 7,
    "creationTimestamp": "2008-01-01T01:01:01Z",
    "deletionTimestamp": "2009-01-01T01:01:01Z",
    "deletionGracePeriodSeconds": 10,
    "labels": {

limitations under the License.
*/

package util

import (
	"net"

	"k8s.io/klog/v2"
	netutils "k8s.io/utils/net"
)

// IPPart returns just the IP part of an IP or IP:port or endpoint string. If the IP
// part is an IPv6 address enclosed in brackets (e.g. "[fd00:1::5]:9999"),
// then the brackets are stripped as well.
func IPPart(s string) string {
	if ip := netutils.ParseIPSloppy(s); ip != nil {

// Parameters:
// * endpointsNN refers to a NamespacedName representing the Endpoints resource.
// * epCache refers to a EndpointPortCache for the specified Endpoints reosource.
func (c *Cache) UpdateEndpointPortCache(endpointsNN types.NamespacedName, epCache *EndpointPortCache) {
	c.lock.Lock()
	defer c.lock.Unlock()

	prevNumEndpoints := 0
	if existingEPCache, ok := c.cache[endpointsNN]; ok {

        def endpoint1 = queue.newEndpoint()
        def endpoint2 = queue.newEndpoint()

        and:
        queue.empty(endpoint1)
        queue.empty(endpoint2)

        when:
        queue.dispatch(message)
        queue.dispatch(message2)
        def messages1 = []
        endpoint1.take(messages1)
        def messages2 = []
        endpoint2.take(messages2)

        then:

// addEndpoints adds an Endpoint for each unique endpoint.
func (cache *EndpointSliceCache) addEndpoints(svcPortName *ServicePortName, portNum int, endpointSet map[string]Endpoint, endpoints []discovery.Endpoint) map[string]Endpoint {
	if endpointSet == nil {
		endpointSet = map[string]Endpoint{}
	}

	// iterate through endpoints to add them to endpointSet.
	for _, endpoint := range endpoints {
		if len(endpoint.Addresses) == 0 {

		if svcInfo, ok := svcPortMap[epSvcPair.ServicePortName]; ok {
			endpointIP := proxyutil.IPPart(epSvcPair.Endpoint)
			nodePort := svcInfo.NodePort()
			var err error
			if nodePort != 0 {
				err = ct.ClearEntriesForPortNAT(endpointIP, nodePort, v1.ProtocolUDP)
				if err != nil {
					klog.ErrorS(err, "Failed to delete nodeport-related endpoint connections", "servicePortName", epSvcPair.ServicePortName)
				}
			}