From aee5b144821e995513a3646d71a981a21d44200f Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@helsinki.at>
Date: Sat, 24 Sep 2016 00:44:12 +0200
Subject: try requested server...


diff --git a/src/rhctl/switch_control.go b/src/rhctl/switch_control.go
index de1496e..6ee8527 100644
--- a/src/rhctl/switch_control.go
+++ b/src/rhctl/switch_control.go
@@ -201,14 +201,32 @@ func (ctrl *SwitchControl) selectServer(server string) bool {
 	return true
 }
 
-func (ctrl *SwitchControl) selectNextValidServer() {
+func (ctrl *SwitchControl) checkAndSelectServer(server string) bool {
+	if state, exists := ctrl.state.Server[server]; exists {
+		if state.Health == ServerAlive && state.Channel != "" {
+			return ctrl.selectServer(server)
+		}
+	}
+	return false
+}
+
+func (ctrl *SwitchControl) selectNextValidServer(preferred string) {
+	if preferred != "" {
+		if ctrl.checkAndSelectServer(preferred) {
+			ctrl.state.Mood = MoodNervous
+			rhl.Printf("SwitchCTRL: switched to preferred server '%s' -> now in mood: %s", preferred, ctrl.state.Mood)
+			return
+		}
+		rhl.Printf("SwitchCTRL: preferred server '%s' is not selectable, keeping on searching...", preferred)
+	}
+
 	for name, state := range ctrl.state.Server {
 		if state.Health == ServerAlive && state.Channel != "" {
 			if !ctrl.selectServer(name) {
 				continue
 			}
 			ctrl.state.Mood = MoodNervous
-			rhl.Printf("SwitchCTRL: found another valid server -> now in mood: %s", ctrl.state.Mood)
+			rhl.Printf("SwitchCTRL: found another valid server '%s' -> now in mood: %s", preferred, ctrl.state.Mood)
 			return
 		}
 	}
@@ -217,7 +235,6 @@ func (ctrl *SwitchControl) selectNextValidServer() {
 }
 
 func (ctrl *SwitchControl) reconcile(requestedServer string) (result bool) {
-	// TODO: requested server is ignored in any case... fix this
 	if !ctrl.state.Settled {
 		return
 	}
@@ -231,7 +248,11 @@ func (ctrl *SwitchControl) reconcile(requestedServer string) (result bool) {
 		rhl.Printf("SwitchCTRL: ignoreing preferred server requests while waking-up")
 		return
 	}
-	rhdl.Printf("SwitchCTRL: reconciling state... (requested server: '%s')", requestedServer)
+	reqSrvSuffix := ""
+	if requestedServer != "" {
+		reqSrvSuffix = " (requested server: '" + requestedServer + "')"
+	}
+	rhdl.Printf("SwitchCTRL: reconciling state...%s", reqSrvSuffix)
 
 	swsrv, swch, err := ctrl.getSwitchServerAssignment()
 	if err != nil {
@@ -244,19 +265,27 @@ func (ctrl *SwitchControl) reconcile(requestedServer string) (result bool) {
 	s, exists := ctrl.state.Server[swsrv]
 	if !exists || s.Health != ServerAlive || s.Channel == "" {
 		rhl.Printf("SwitchCTRL: server '%s' is unknown, dead or has invalid channel!", swsrv)
-		ctrl.selectNextValidServer()
+		ctrl.selectNextValidServer(requestedServer)
 		return
 	}
 	ctrl.state.ActiveServer = swsrv
 
-	if s.Channel != swch {
-		// TODO: during normal operation switching server channels is expected and shouldn't lead to mood nervous?!?!?
-		ctrl.state.Mood = MoodNervous
-		rhl.Printf("SwitchCTRL: switch and server channel mismatch: '%s' != '%s' -> now in mood: %s", swch, s.Channel, ctrl.state.Mood)
-		if !ctrl.selectServer(ctrl.state.ActiveServer) {
-			ctrl.selectNextValidServer()
+	if ctrl.state.ActiveServer != requestedServer {
+		if ctrl.checkAndSelectServer(requestedServer) {
+			rhl.Printf("SwitchCTRL: switching to requested server '%s' ...", requestedServer)
+		} else {
+			rhl.Printf("SwitchCTRL: requested server '%s' is not selectable, ignoring request", requestedServer)
+		}
+	} else {
+		if s.Channel != swch {
+			// TODO: during normal operation switching server channels is expected and shouldn't lead to mood nervous?!?!?
+			ctrl.state.Mood = MoodNervous
+			rhl.Printf("SwitchCTRL: switch and server channel mismatch: '%s' != '%s' -> now in mood: %s", swch, s.Channel, ctrl.state.Mood)
+			if !ctrl.selectServer(ctrl.state.ActiveServer) {
+				ctrl.selectNextValidServer("")
+			}
+			return
 		}
-		return
 	}
 
 	for _, s := range ctrl.state.Server {
@@ -283,7 +312,6 @@ func (ctrl *SwitchControl) Run() {
 	}
 
 	// send out commands to switch and/or server to get missing infos
-	// TODO: this should be called from reconcile but with some sort of rate-limiting...
 	ctrl.checkMissingOrStaleStates(2 * time.Hour) // TODO: hardcoded value
 
 	ctrl.reconcile("")
-- 
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