/
cache.go
72 lines (63 loc) · 1.65 KB
/
cache.go
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package unregistration
import (
"sync"
"code.cloudfoundry.org/lager/v3"
"code.cloudfoundry.org/route-emitter/routingtable"
"github.com/mitchellh/hashstructure"
)
//go:generate counterfeiter -o fakes/fake_cache.go . Cache
type Cache interface {
Add([]routingtable.RegistryMessage) error
Remove([]routingtable.RegistryMessage) error
List() []*Message
}
type cache struct {
messages map[uint64]*Message
mux *sync.Mutex
logger lager.Logger
}
func NewCache(logger lager.Logger) Cache {
cacheLogger := logger.Session("unregistration-cache")
return &cache{
messages: map[uint64]*Message{},
mux: &sync.Mutex{},
logger: cacheLogger,
}
}
func (c *cache) Add(registryMessages []routingtable.RegistryMessage) error {
c.mux.Lock()
defer c.mux.Unlock()
c.logger.Debug("add", lager.Data{"cache": registryMessages})
for _, registryMessage := range registryMessages {
registryMessageHash, err := hashstructure.Hash(registryMessage, nil)
if err != nil {
return err
}
c.messages[registryMessageHash] = &Message{
RegistryMessage: registryMessage,
}
}
return nil
}
func (c *cache) Remove(registryMessages []routingtable.RegistryMessage) error {
c.mux.Lock()
defer c.mux.Unlock()
c.logger.Debug("remove", lager.Data{"cache": registryMessages})
for _, registryMessage := range registryMessages {
registryMessageHash, err := hashstructure.Hash(registryMessage, nil)
if err != nil {
return err
}
delete(c.messages, registryMessageHash)
}
return nil
}
func (c *cache) List() []*Message {
c.mux.Lock()
defer c.mux.Unlock()
list := []*Message{}
for _, message := range c.messages {
list = append(list, message)
}
return list
}