global: split Akvorado into 3 services

cmd/components.go

@@ -0,0 +1,48 @@
+package cmd
+
+import (
+	"fmt"
+
+	"akvorado/common/daemon"
+	"akvorado/common/reporter"
+)
+
+// StartStopComponents activate/deactivate components in order.
+func StartStopComponents(r *reporter.Reporter, daemonComponent daemon.Component, otherComponents []interface{}) error {
+	components := append([]interface{}{r, daemonComponent}, otherComponents...)
+	startedComponents := []interface{}{}
+	defer func() {
+		for _, cmp := range startedComponents {
+			if stopperC, ok := cmp.(stopper); ok {
+				if err := stopperC.Stop(); err != nil {
+					r.Err(err).Msg("unable to stop component, ignoring")
+				}
+			}
+		}
+	}()
+	for _, cmp := range components {
+		if starterC, ok := cmp.(starter); ok {
+			if err := starterC.Start(); err != nil {
+				return fmt.Errorf("unable to start component: %w", err)
+			}
+		}
+		startedComponents = append([]interface{}{cmp}, startedComponents...)
+	}
+
+	r.Info().
+		Str("version", Version).Str("build-date", BuildDate).
+		Msg("akvorado has started")
+
+	select {
+	case <-daemonComponent.Terminated():
+		r.Info().Msg("stopping all components")
+	}
+	return nil
+}
+
+type starter interface {
+	Start() error
+}
+type stopper interface {
+	Stop() error
+}