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service_discovery_consul.go
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174 lines (142 loc) · 4.14 KB
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package storage
import (
"slices"
"sync"
"github.com/haproxytech/client-native/v6/models"
"github.com/haproxytech/dataplaneapi/storagetype"
)
const (
ConsulFileName = "service_discovery/consul.json"
)
type SDConsulStorage interface {
Consul
Load() error
Store() error
}
type Consul interface {
// GetConsuls does not load the consuls from the storage. Use Load() to load the them if needed.
GetConsuls() storagetype.Consuls
// AddConsulsAndStore adds a list of consuls to the storage and stores in the storage file.
AddConsulsAndStore(consuls storagetype.Consuls) error
// AddConsulAndStore adds a new consul to the storage and stores in the storage file.
AddConsulAndStore(consul *models.Consul) error
// RemoveConsulAndStore removes a consul from the storage and stores in the storage file.
RemoveConsulAndStore(consul *models.Consul) error
// ReplaceAllConsulsAndStore replaces the list of consuls in the storage and stores in the storage file.
ReplaceAllConsulsAndStore(consuls storagetype.Consuls) error
}
type consulStorageImpl struct {
ConsulData storagetype.ConsulData
storage Storage[storagetype.ConsulData]
mu sync.RWMutex
}
// NewSDConsulStorage creates a new consulStorageImpl with initial configuration from a file path.
func NewSDConsulStorage(path string) (SDConsulStorage, error) {
fs := &fileStorage[storagetype.ConsulData]{path}
if err := fs.initFile(); err != nil {
return nil, err
}
consulData, err := fs.Get()
if err != nil {
return nil, err
}
return &consulStorageImpl{
storage: fs,
ConsulData: consulData,
}, nil
}
func (cs *consulStorageImpl) GetConsuls() storagetype.Consuls {
cs.mu.RLock()
defer cs.mu.RUnlock()
return cs.ConsulData.Consuls
}
func (cs *consulStorageImpl) Load() error {
cs.mu.Lock()
defer cs.mu.Unlock()
consul, err := cs.load()
if err != nil {
return err
}
cs.ConsulData = consul
return nil
}
func (cs *consulStorageImpl) Store() error {
cs.mu.Lock()
defer cs.mu.Unlock()
if err := cs.store(); err != nil {
return err
}
return nil
}
func (cs *consulStorageImpl) AddConsulAndStore(consul *models.Consul) error {
cs.mu.Lock()
defer cs.mu.Unlock()
cs.addConsul(consul)
// In case something went wrong whil storing, delete the consul from the store
if err := cs.store(); err != nil {
cs.removeConsul(consul)
return err
}
return nil
}
func (cs *consulStorageImpl) AddConsulsAndStore(consuls storagetype.Consuls) error {
cs.mu.Lock()
defer cs.mu.Unlock()
cs.addConsuls(consuls)
// In case something went wrong whil storing, delete the consul from the store
if err := cs.store(); err != nil {
cs.removeConsuls(consuls)
return err
}
return nil
}
func (cs *consulStorageImpl) ReplaceAllConsulsAndStore(consuls storagetype.Consuls) error {
cs.mu.Lock()
defer cs.mu.Unlock()
oldConsuls := cs.ConsulData.Consuls
cs.ConsulData.Consuls = consuls
if err := cs.store(); err != nil {
cs.ConsulData.Consuls = oldConsuls
return err
}
return nil
}
func (cs *consulStorageImpl) RemoveConsulAndStore(consul *models.Consul) error {
cs.mu.Lock()
defer cs.mu.Unlock()
cs.removeConsul(consul)
// In case something went wrong while storing, add the consul to the store
if err := cs.store(); err != nil {
cs.addConsul(consul)
return err
}
return nil
}
func (cs *consulStorageImpl) addConsul(consul *models.Consul) {
cs.ConsulData.Consuls = append(cs.ConsulData.Consuls, consul)
}
func (cs *consulStorageImpl) addConsuls(consuls storagetype.Consuls) {
cs.ConsulData.Consuls = append(cs.ConsulData.Consuls, consuls...)
}
func (cs *consulStorageImpl) removeConsul(consul *models.Consul) {
for i, u := range cs.ConsulData.Consuls {
if u.Name == consul.Name {
cs.ConsulData.Consuls = slices.Delete(cs.ConsulData.Consuls, i, i+1)
break
}
}
}
func (cs *consulStorageImpl) removeConsuls(consuls storagetype.Consuls) {
for _, consul := range consuls {
cs.removeConsul(consul)
}
}
func (cs *consulStorageImpl) setConsuls(consuls storagetype.Consuls) {
cs.ConsulData.Consuls = consuls
}
func (cs *consulStorageImpl) store() error {
return cs.storage.Store(cs.ConsulData)
}
func (cs *consulStorageImpl) load() (storagetype.ConsulData, error) {
return cs.storage.Get()
}