mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-12-05 01:52:46 +00:00
5e871e81a8
* otel to 1.24 * prometheus exporter to 0.46 * bunotel to 1.1.17 Also: * Use schemaless URL for metrics * Add software version to tracing schema
252 lines
7.1 KiB
Go
252 lines
7.1 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 any
|
|
}
|
|
|
|
// 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 {
|
|
// The underlying map is keyed by an Address with fields that we don't care
|
|
// about being set to their zero values. The only fields that we care about
|
|
// are `Addr`, `ServerName` and `Attributes`. Since we need to be able to
|
|
// distinguish between addresses with same `Addr` and `ServerName`, but
|
|
// different `Attributes`, we cannot store the `Attributes` in the map key.
|
|
//
|
|
// The comparison operation for structs work as follows:
|
|
// Struct values are comparable if all their fields are comparable. Two
|
|
// struct values are equal if their corresponding non-blank fields are equal.
|
|
//
|
|
// The value type of the map contains a slice of addresses which match the key
|
|
// in their `Addr` and `ServerName` fields and contain the corresponding value
|
|
// associated with them.
|
|
m map[Address]addressMapEntryList
|
|
}
|
|
|
|
func toMapKey(addr *Address) Address {
|
|
return Address{Addr: addr.Addr, ServerName: addr.ServerName}
|
|
}
|
|
|
|
type addressMapEntryList []*addressMapEntry
|
|
|
|
// NewAddressMap creates a new AddressMap.
|
|
func NewAddressMap() *AddressMap {
|
|
return &AddressMap{m: make(map[Address]addressMapEntryList)}
|
|
}
|
|
|
|
// find returns the index of addr in the addressMapEntry slice, or -1 if not
|
|
// present.
|
|
func (l addressMapEntryList) find(addr Address) int {
|
|
for i, entry := range l {
|
|
// Attributes are the only thing to match on here, since `Addr` and
|
|
// `ServerName` are already equal.
|
|
if 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 any, ok bool) {
|
|
addrKey := toMapKey(&addr)
|
|
entryList := a.m[addrKey]
|
|
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 any) {
|
|
addrKey := toMapKey(&addr)
|
|
entryList := a.m[addrKey]
|
|
if entry := entryList.find(addr); entry != -1 {
|
|
entryList[entry].value = value
|
|
return
|
|
}
|
|
a.m[addrKey] = append(entryList, &addressMapEntry{addr: addr, value: value})
|
|
}
|
|
|
|
// Delete removes addr from the map.
|
|
func (a *AddressMap) Delete(addr Address) {
|
|
addrKey := toMapKey(&addr)
|
|
entryList := a.m[addrKey]
|
|
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[addrKey] = 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
|
|
}
|
|
|
|
// Values returns a slice of all current map values.
|
|
func (a *AddressMap) Values() []any {
|
|
ret := make([]any, 0, a.Len())
|
|
for _, entryList := range a.m {
|
|
for _, entry := range entryList {
|
|
ret = append(ret, entry.value)
|
|
}
|
|
}
|
|
return ret
|
|
}
|
|
|
|
type endpointNode struct {
|
|
addrs map[string]struct{}
|
|
}
|
|
|
|
// Equal returns whether the unordered set of addrs are the same between the
|
|
// endpoint nodes.
|
|
func (en *endpointNode) Equal(en2 *endpointNode) bool {
|
|
if len(en.addrs) != len(en2.addrs) {
|
|
return false
|
|
}
|
|
for addr := range en.addrs {
|
|
if _, ok := en2.addrs[addr]; !ok {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func toEndpointNode(endpoint Endpoint) endpointNode {
|
|
en := make(map[string]struct{})
|
|
for _, addr := range endpoint.Addresses {
|
|
en[addr.Addr] = struct{}{}
|
|
}
|
|
return endpointNode{
|
|
addrs: en,
|
|
}
|
|
}
|
|
|
|
// EndpointMap is a map of endpoints to arbitrary values keyed on only the
|
|
// unordered set of address strings within an endpoint. This map is not thread
|
|
// safe, thus it is unsafe to access concurrently. Must be created via
|
|
// NewEndpointMap; do not construct directly.
|
|
type EndpointMap struct {
|
|
endpoints map[*endpointNode]any
|
|
}
|
|
|
|
// NewEndpointMap creates a new EndpointMap.
|
|
func NewEndpointMap() *EndpointMap {
|
|
return &EndpointMap{
|
|
endpoints: make(map[*endpointNode]any),
|
|
}
|
|
}
|
|
|
|
// Get returns the value for the address in the map, if present.
|
|
func (em *EndpointMap) Get(e Endpoint) (value any, ok bool) {
|
|
en := toEndpointNode(e)
|
|
if endpoint := em.find(en); endpoint != nil {
|
|
return em.endpoints[endpoint], true
|
|
}
|
|
return nil, false
|
|
}
|
|
|
|
// Set updates or adds the value to the address in the map.
|
|
func (em *EndpointMap) Set(e Endpoint, value any) {
|
|
en := toEndpointNode(e)
|
|
if endpoint := em.find(en); endpoint != nil {
|
|
em.endpoints[endpoint] = value
|
|
return
|
|
}
|
|
em.endpoints[&en] = value
|
|
}
|
|
|
|
// Len returns the number of entries in the map.
|
|
func (em *EndpointMap) Len() int {
|
|
return len(em.endpoints)
|
|
}
|
|
|
|
// Keys returns a slice of all current map keys, as endpoints specifying the
|
|
// addresses present in the endpoint keys, in which uniqueness is determined by
|
|
// the unordered set of addresses. Thus, endpoint information returned is not
|
|
// the full endpoint data (drops duplicated addresses and attributes) but can be
|
|
// used for EndpointMap accesses.
|
|
func (em *EndpointMap) Keys() []Endpoint {
|
|
ret := make([]Endpoint, 0, len(em.endpoints))
|
|
for en := range em.endpoints {
|
|
var endpoint Endpoint
|
|
for addr := range en.addrs {
|
|
endpoint.Addresses = append(endpoint.Addresses, Address{Addr: addr})
|
|
}
|
|
ret = append(ret, endpoint)
|
|
}
|
|
return ret
|
|
}
|
|
|
|
// Values returns a slice of all current map values.
|
|
func (em *EndpointMap) Values() []any {
|
|
ret := make([]any, 0, len(em.endpoints))
|
|
for _, val := range em.endpoints {
|
|
ret = append(ret, val)
|
|
}
|
|
return ret
|
|
}
|
|
|
|
// find returns a pointer to the endpoint node in em if the endpoint node is
|
|
// already present. If not found, nil is returned. The comparisons are done on
|
|
// the unordered set of addresses within an endpoint.
|
|
func (em EndpointMap) find(e endpointNode) *endpointNode {
|
|
for endpoint := range em.endpoints {
|
|
if e.Equal(endpoint) {
|
|
return endpoint
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Delete removes the specified endpoint from the map.
|
|
func (em *EndpointMap) Delete(e Endpoint) {
|
|
en := toEndpointNode(e)
|
|
if entry := em.find(en); entry != nil {
|
|
delete(em.endpoints, entry)
|
|
}
|
|
}
|