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package memory
import (
"sync"
"github.com/spiral/roadrunner/v2/pkg/pubsub"
"github.com/spiral/roadrunner/v2/plugins/logger"
)
const (
PluginName string = "memory"
)
type Plugin struct {
log logger.Logger
// channel with the messages from the RPC
pushCh chan *pubsub.Message
// user-subscribed topics
topics sync.Map
}
func (p *Plugin) Init(log logger.Logger) error {
p.log = log
p.pushCh = make(chan *pubsub.Message, 100)
return nil
}
// Available interface implementation for the plugin
func (p *Plugin) Available() {}
// Name is endure.Named interface implementation
func (p *Plugin) Name() string {
return PluginName
}
func (p *Plugin) Publish(messages []*pubsub.Message) error {
for i := 0; i < len(messages); i++ {
p.pushCh <- messages[i]
}
return nil
}
func (p *Plugin) PublishAsync(messages []*pubsub.Message) {
go func() {
for i := 0; i < len(messages); i++ {
p.pushCh <- messages[i]
}
}()
}
func (p *Plugin) Subscribe(topics ...string) error {
for i := 0; i < len(topics); i++ {
p.topics.Store(topics[i], struct{}{})
}
return nil
}
func (p *Plugin) Unsubscribe(topics ...string) error {
for i := 0; i < len(topics); i++ {
p.topics.Delete(topics[i])
}
return nil
}
func (p *Plugin) Next() (*pubsub.Message, error) {
msg := <-p.pushCh
if msg == nil {
return nil, nil
}
// push only messages, which are subscribed
// TODO better???
for i := 0; i < len(msg.Topics); i++ {
if _, ok := p.topics.Load(msg.Topics[i]); ok {
return msg, nil
}
}
return nil, nil
}
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