loader logic revised

client/loader/service.go

@@ -0,0 +1,34 @@
+package loader
+
+import (
+	"context"
+	"time"
+)
+
+// backgroundLoop периодически проверяет доступность соединения и наличие новых версий на сервере
+func (l *loader) backgroundLoop(ctx context.Context, stop <-chan struct{}) {
+	checkConnTimer := time.NewTimer(checkConnectionTimeout)
+	checkVersionTimer := time.NewTimer(checkVersionTimeout)
+	defer func() {
+		checkConnTimer.Stop()
+		checkVersionTimer.Stop()
+	}()
+	for {
+		select {
+		case <-ctx.Done():
+			l.client.Shutdown()
+			return
+		case <-stop:
+			return
+		case <-checkConnTimer.C:
+			isGood := l.connector.CheckConnection()
+			l.client.OnConnection(isGood)
+			checkConnTimer.Reset(checkConnectionTimeout)
+		case <-checkVersionTimer.C:
+			if err := l.checkAndDownloadPluginVersion(); err != nil {
+				l.onConnectionError(err) // TODO: separate error types for: onConnectionError / onStorageError / onServiceError
+			}
+			checkVersionTimer.Reset(checkVersionTimeout)
+		}
+	}
+}