1 files changed, 76 insertions, 0 deletions
diff --git a/plugins/memory/plugin.go b/plugins/memory/plugin.go
new file mode 100644
index 00000000..2ad041aa
--- /dev/null
+++ b/plugins/memory/plugin.go
@@ -0,0 +1,76 @@
+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
+	// 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
+}