Update vendor (#1265)

vendor/github.com/wiggin77/cfg/srcmap.go

@@ -0,0 +1,78 @@
+package cfg
+
+import (
+	"time"
+)
+
+// SrcMap is a configuration `Source` backed by a simple map.
+type SrcMap struct {
+	AbstractSourceMonitor
+	m  map[string]string
+	lm time.Time
+}
+
+// NewSrcMap creates an empty `SrcMap`.
+func NewSrcMap() *SrcMap {
+	sm := &SrcMap{}
+	sm.m = make(map[string]string)
+	sm.lm = time.Now()
+	sm.freq = time.Minute
+	return sm
+}
+
+// NewSrcMapFromMap creates a `SrcMap` containing a copy of the
+// specified map.
+func NewSrcMapFromMap(mapIn map[string]string) *SrcMap {
+	sm := NewSrcMap()
+	sm.PutAll(mapIn)
+	return sm
+}
+
+// Put inserts or updates a value in the `SrcMap`.
+func (sm *SrcMap) Put(key string, val string) {
+	sm.mutex.Lock()
+	sm.m[key] = val
+	sm.lm = time.Now()
+	sm.mutex.Unlock()
+}
+
+// PutAll inserts a copy of `mapIn` into the `SrcMap`
+func (sm *SrcMap) PutAll(mapIn map[string]string) {
+	sm.mutex.Lock()
+	defer sm.mutex.Unlock()
+
+	for k, v := range mapIn {
+		sm.m[k] = v
+	}
+	sm.lm = time.Now()
+}
+
+// GetProps fetches all the properties from a source and returns
+// them as a map.
+func (sm *SrcMap) GetProps() (m map[string]string, err error) {
+	sm.mutex.RLock()
+	m = sm.m
+	sm.mutex.RUnlock()
+	return
+}
+
+// GetLastModified returns the time of the latest modification to any
+// property value within the source. If a source does not support
+// modifying properties at runtime then the zero value for `Time`
+// should be returned to ensure reload events are not generated.
+func (sm *SrcMap) GetLastModified() (last time.Time, err error) {
+	sm.mutex.RLock()
+	last = sm.lm
+	sm.mutex.RUnlock()
+	return
+}
+
+// GetMonitorFreq returns the frequency as a `time.Duration` between
+// checks for changes to this config source. Defaults to 1 minute
+// unless changed with `SetMonitorFreq`.
+func (sm *SrcMap) GetMonitorFreq() (freq time.Duration) {
+	sm.mutex.RLock()
+	freq = sm.freq
+	sm.mutex.RUnlock()
+	return
+}