mirror of https://github.com/k3s-io/k3s
61 lines
1.5 KiB
Go
61 lines
1.5 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package slave
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import (
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"sync"
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)
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type Registry struct {
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lock sync.Mutex
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hostNames map[string]string
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}
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func NewRegistry() *Registry {
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return &Registry{
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hostNames: map[string]string{},
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}
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}
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// Register creates a mapping between a slaveId and slave if not existing.
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func (st *Registry) Register(slaveId, slaveHostname string) {
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st.lock.Lock()
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defer st.lock.Unlock()
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_, exists := st.hostNames[slaveId]
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if !exists {
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st.hostNames[slaveId] = slaveHostname
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}
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}
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// SlaveIDs returns the keys of the registry
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func (st *Registry) SlaveIDs() []string {
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st.lock.Lock()
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defer st.lock.Unlock()
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slaveIds := make([]string, 0, len(st.hostNames))
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for slaveID := range st.hostNames {
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slaveIds = append(slaveIds, slaveID)
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}
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return slaveIds
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}
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// HostName looks up a hostname for a given slaveId
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func (st *Registry) HostName(slaveId string) string {
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st.lock.Lock()
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defer st.lock.Unlock()
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return st.hostNames[slaveId]
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}
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