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runtime_const.go
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runtime_const.go
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// Copyright 2019 HAProxy Technologies
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package runtime
import (
"strconv"
"strings"
"sync"
)
//nolint:gochecknoglobals
var (
possibleStates map[string]struct{}
oncePossibleStates sync.Once
)
//nolint:gochecknoglobals
var (
possibleHealths map[string]struct{}
oncePossibleHealths sync.Once
)
// ServerStateValid checks if server state is valid
func ServerStateValid(state string) bool {
oncePossibleStates.Do(func() {
possibleStates = map[string]struct{}{
"ready": {},
"drain": {},
"maint": {},
}
})
_, ok := possibleStates[state]
return ok
}
// ServerHealthValid checks if server health is valid
func ServerHealthValid(health string) bool {
oncePossibleHealths.Do(func() {
possibleHealths = map[string]struct{}{
"up": {},
"stopping": {},
"down": {},
}
})
_, ok := possibleHealths[health]
return ok
}
// ServerWeightValid checks if server state is valid
func ServerWeightValid(weight string) bool {
var n int64
var err error
if strings.HasSuffix(weight, "%") {
percent := strings.TrimSuffix(weight, "%")
if n, err = strconv.ParseInt(percent, 10, 64); err != nil {
return false
}
if n > -1 && n < 101 {
return true
}
}
if n, err = strconv.ParseInt(weight, 10, 64); err != nil {
return false
}
if n > -1 && n < 257 {
return true
}
return false
}