Fix bug in setting the precision before gathering metrics

Closes #175

CHANGELOG.md

@@ -9,6 +9,7 @@ will still be backwards compatible if only `url` is specified.
 
 ### Bugfixes
 - [#170](https://github.com/influxdb/telegraf/issues/170): Systemd support
+- [#175](https://github.com/influxdb/telegraf/issues/175): Set write precision before gathering metrics
 
 ## v0.1.8 [2015-09-04]
 

accumulator.go

@@ -25,7 +25,11 @@ type BatchPoints struct {
 }
 
 // Add adds a measurement
-func (bp *BatchPoints) Add(measurement string, val interface{}, tags map[string]string) {
+func (bp *BatchPoints) Add(
+	measurement string,
+	val interface{},
+	tags map[string]string,
+) {
 	bp.mu.Lock()
 	defer bp.mu.Unlock()
 

agent.go

@@ -196,16 +196,17 @@ func (a *Agent) crankParallel() error {
 		go func(plugin *runningPlugin) {
 			defer wg.Done()
 
-			var acc BatchPoints
+			var bp BatchPoints
-			acc.Debug = a.Debug
+			bp.Debug = a.Debug
-			acc.Prefix = plugin.name + "_"
+			bp.Prefix = plugin.name + "_"
-			acc.Config = plugin.config
+			bp.Config = plugin.config
+			bp.Precision = a.Precision
 
-			if err := plugin.plugin.Gather(&acc); err != nil {
+			if err := plugin.plugin.Gather(&bp); err != nil {
 				log.Printf("Error in plugin [%s]: %s", plugin.name, err)
 			}
 
-			points <- &acc
+			points <- &bp
 		}(plugin)
 	}
 
@@ -233,6 +234,7 @@ func (a *Agent) crank() error {
 	var bp BatchPoints
 
 	bp.Debug = a.Debug
+	bp.Precision = a.Precision
 
 	for _, plugin := range a.plugins {
 		bp.Prefix = plugin.name + "_"
@@ -248,7 +250,6 @@ func (a *Agent) crank() error {
 	if a.UTC {
 		bp.Time = bp.Time.UTC()
 	}
-	bp.Precision = a.Precision
 
 	return a.flush(&bp)
 }
@@ -266,6 +267,7 @@ func (a *Agent) crankSeparate(shutdown chan struct{}, plugin *runningPlugin) err
 
 		bp.Prefix = plugin.name + "_"
 		bp.Config = plugin.config
+		bp.Precision = a.Precision
 
 		if err := plugin.plugin.Gather(&bp); err != nil {
 			log.Printf("Error in plugin [%s]: %s", plugin.name, err)
@@ -277,7 +279,6 @@ func (a *Agent) crankSeparate(shutdown chan struct{}, plugin *runningPlugin) err
 		if a.UTC {
 			bp.Time = bp.Time.UTC()
 		}
-		bp.Precision = a.Precision
 
 		if err := a.flush(&bp); err != nil {
 			outerr = errors.New("Error encountered processing plugins & outputs")