mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-11-21 14:44:00 +00:00
109 lines
2.9 KiB
Go
109 lines
2.9 KiB
Go
/*
|
|
*
|
|
* Copyright 2021 gRPC authors.
|
|
*
|
|
* 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 resolver
|
|
|
|
type addressMapEntry struct {
|
|
addr Address
|
|
value interface{}
|
|
}
|
|
|
|
// AddressMap is a map of addresses to arbitrary values taking into account
|
|
// Attributes. BalancerAttributes are ignored, as are Metadata and Type.
|
|
// Multiple accesses may not be performed concurrently. Must be created via
|
|
// NewAddressMap; do not construct directly.
|
|
type AddressMap struct {
|
|
m map[string]addressMapEntryList
|
|
}
|
|
|
|
type addressMapEntryList []*addressMapEntry
|
|
|
|
// NewAddressMap creates a new AddressMap.
|
|
func NewAddressMap() *AddressMap {
|
|
return &AddressMap{m: make(map[string]addressMapEntryList)}
|
|
}
|
|
|
|
// find returns the index of addr in the addressMapEntry slice, or -1 if not
|
|
// present.
|
|
func (l addressMapEntryList) find(addr Address) int {
|
|
if len(l) == 0 {
|
|
return -1
|
|
}
|
|
for i, entry := range l {
|
|
if entry.addr.ServerName == addr.ServerName &&
|
|
entry.addr.Attributes.Equal(addr.Attributes) {
|
|
return i
|
|
}
|
|
}
|
|
return -1
|
|
}
|
|
|
|
// Get returns the value for the address in the map, if present.
|
|
func (a *AddressMap) Get(addr Address) (value interface{}, ok bool) {
|
|
entryList := a.m[addr.Addr]
|
|
if entry := entryList.find(addr); entry != -1 {
|
|
return entryList[entry].value, true
|
|
}
|
|
return nil, false
|
|
}
|
|
|
|
// Set updates or adds the value to the address in the map.
|
|
func (a *AddressMap) Set(addr Address, value interface{}) {
|
|
entryList := a.m[addr.Addr]
|
|
if entry := entryList.find(addr); entry != -1 {
|
|
a.m[addr.Addr][entry].value = value
|
|
return
|
|
}
|
|
a.m[addr.Addr] = append(a.m[addr.Addr], &addressMapEntry{addr: addr, value: value})
|
|
}
|
|
|
|
// Delete removes addr from the map.
|
|
func (a *AddressMap) Delete(addr Address) {
|
|
entryList := a.m[addr.Addr]
|
|
entry := entryList.find(addr)
|
|
if entry == -1 {
|
|
return
|
|
}
|
|
if len(entryList) == 1 {
|
|
entryList = nil
|
|
} else {
|
|
copy(entryList[entry:], entryList[entry+1:])
|
|
entryList = entryList[:len(entryList)-1]
|
|
}
|
|
a.m[addr.Addr] = entryList
|
|
}
|
|
|
|
// Len returns the number of entries in the map.
|
|
func (a *AddressMap) Len() int {
|
|
ret := 0
|
|
for _, entryList := range a.m {
|
|
ret += len(entryList)
|
|
}
|
|
return ret
|
|
}
|
|
|
|
// Keys returns a slice of all current map keys.
|
|
func (a *AddressMap) Keys() []Address {
|
|
ret := make([]Address, 0, a.Len())
|
|
for _, entryList := range a.m {
|
|
for _, entry := range entryList {
|
|
ret = append(ret, entry.addr)
|
|
}
|
|
}
|
|
return ret
|
|
}
|