schema/notify: state.State

Representation of the STATE component in a keepalived notify event.

Can be one of: MASTER,BACKUP,STOP (for VRRP events)

  TYPE INSTANCE STATE PRIORITY
                ^^^^^

schema/notify/state/flags.go

@@ -0,0 +1,87 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package state
+
+import "strings"
+
+const (
+	// Zero value
+	NULL State = 0
+	// VRRP instance is master and owns the VIP
+	MASTER = 1 << iota
+	// VRRP instance is now a backup, and does not own the VIP
+	BACKUP
+	// VRRP instance has exited
+	STOP
+
+	// Unknown state was encountered, aliases NULL
+	UNKNOWN State = NULL
+)
+
+var (
+	s2s map[string]State = map[string]State{
+		"MASTER": MASTER,
+		"BACKUP": BACKUP,
+		"STOP":   STOP,
+	}
+)
+
+func ParseState(i string) State {
+	i = strings.TrimSpace(i)
+
+	s, ok := s2s[i]
+	if !ok {
+		return UNKNOWN
+	}
+
+	return s
+}
+
+type State uint8
+
+func (t State) Has(flag State) bool {
+	return t&flag != 0
+}
+
+func (s State) Is(other State) bool {
+	return s == other
+}
+
+func (s State) IsMaster() bool {
+	return s.Is(MASTER)
+}
+
+func (s State) IsBackup() bool {
+	return s.Is(BACKUP)
+}
+
+func (s State) IsStop() bool {
+	return s.Is(STOP)
+}
+
+func (s State) IsUnknown() bool {
+	return s.Is(UNKNOWN)
+}
+
+func (s State) String() string {
+	var o string
+
+	switch s {
+	case UNKNOWN:
+		o = "UNKNOWN"
+	case MASTER:
+		o = "MASTER"
+	case BACKUP:
+		o = "BACKUP"
+	case STOP:
+		o = "STOP"
+	default:
+		panic("missing case in notify/ty/flags.go:String()")
+	}
+
+	return o
+}