Merge branch 'plugin/metrics' into plugin/http

# Conflicts:
#	plugins/server/plugin.go

2 files changed, 18 insertions, 1 deletions

diff --git a/interfaces/metrics/interface.go b/interfaces/metrics/interface.go
index 8207fb51..505c3d7b 100644
--- a/interfaces/metrics/interface.go
+++ b/interfaces/metrics/interface.go
@@ -5,5 +5,5 @@ import (
 )
 
 type StatProvider interface {
-	MetricsCollector() prometheus.Collector
+	MetricsCollector() []prometheus.Collector
 }
diff --git a/interfaces/server/interface.go b/interfaces/server/interface.go
new file mode 100644
index 00000000..51d172cb
--- /dev/null
+++ b/interfaces/server/interface.go
@@ -0,0 +1,17 @@
+package server
+
+import (
+	"context"
+	"os/exec"
+
+	"github.com/spiral/roadrunner/v2"
+)
+
+type Env map[string]string
+
+// WorkerFactory creates workers for the application.
+type WorkerFactory interface {
+	CmdFactory(env Env) (func() *exec.Cmd, error)
+	NewWorker(ctx context.Context, env Env) (roadrunner.WorkerBase, error)
+	NewWorkerPool(ctx context.Context, opt roadrunner.PoolConfig, env Env) (roadrunner.Pool, error)
+}