[WIP] feat(informer): add interface and RPC to see the list of registered plugins

go.mod

@@ -35,3 +35,7 @@ require (
 	golang.org/x/sync v0.0.0-20201207232520-09787c993a3a
 	golang.org/x/sys v0.0.0-20210309074719-68d13333faf2
 )
+
+replace (
+	github.com/spiral/endure v1.0.1 => ../endure
+)

plugins/informer/interface.go

@@ -8,3 +8,9 @@ import (
 type Informer interface {
 	Workers() []process.State
 }
+
+// Lister interface used to filter available plugins
+type Lister interface {
+	// List gets no args, but returns list of the active plugins
+	List() []string
+}

plugins/informer/plugin.go

@@ -11,6 +11,7 @@ const PluginName = "informer"
 
 type Plugin struct {
 	registry map[string]Informer
+	plugins  map[string]Lister
 	log      logger.Logger
 }
 
@@ -31,19 +32,24 @@ func (p *Plugin) Workers(name string) ([]process.State, error) {
 	return svc.Workers(), nil
 }
 
-// CollectTarget resettable service.
-func (p *Plugin) CollectTarget(name endure.Named, r Informer) error {
-	p.registry[name.Name()] = r
-	return nil
-}
-
 // Collects declares services to be collected.
 func (p *Plugin) Collects() []interface{} {
 	return []interface{}{
-		p.CollectTarget,
+		p.CollectWorkers,
 	}
 }
 
+// CollectPlugins collects all RR plugins
+func (p *Plugin) CollectPlugins(name endure.Named, l Lister) {
+	p.plugins[name.Name()] = l
+}
+
+// CollectWorkers obtains plugins with workers inside.
+func (p *Plugin) CollectWorkers(name endure.Named, r Informer) error {
+	p.registry[name.Name()] = r
+	return nil
+}
+
 // Name of the service.
 func (p *Plugin) Name() string {
 	return PluginName