fix ErrorCallbackFunc

Author: ifireice

examples/exemplars/main.go

@@ -14,6 +14,54 @@
 // A simple example of how to record a latency metric with exemplars, using a fictional id
 // as a prometheus label.
 
+package main
+
+import (
+	"context"
+	"fmt"
+	"github.com/prometheus/client_golang/prometheus/collectors"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+	"log"
+	"math/rand"
+	"net/http"
+	"time"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/graphite"
+	"go.uber.org/zap"
+)
+
+func main() {
+	logger, _ := zap.NewProduction()
+	defer logger.Sync()
+
+	ctx := context.Background()
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+
+	c := &Config{
+		URL:              "graphite.example.org:3099",
+		Gatherer:         prometheus.DefaultGatherer,
+		Prefix:           "prefix",
+		Interval:          5 * time.Second,
+		Timeout:           2 * time.Second,
+		ErrorHandling:     testCase.errorHandling,
+		ErrorCallbackFunc: func(err error) {  if err != nil { logger.Error("run", zap.Error(err)); cancel() } },
+	}
+
+
+	b, err := graphite.NewBridge(c)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	b.Run(ctx)
+}
+
+
+
+
+
 package main
 
 import (

prometheus/graphite/bridge.go

@@ -50,9 +50,6 @@ const (
 
 	// Abort the push to Graphite upon the first error encountered.
 	AbortOnError
-
-	// Execute callback function on error.
-	CallbackOnError
 )
 
 // Config defines the Graphite bridge config.
@@ -84,7 +81,7 @@ type Config struct {
 	ErrorHandling HandlerErrorHandling
 
 	// ErrorCallbackFunc is a callback function that can be executed when error is occurred
-	ErrorCallbackFunc CallbackFunc
+	ErrorCallbackFunc ErrorCallbackFunc
 }
 
 // Bridge pushes metrics to the configured Graphite server.
@@ -96,7 +93,7 @@ type Bridge struct {
 	timeout  time.Duration
 
 	errorHandling     HandlerErrorHandling
-	errorCallbackFunc CallbackFunc
+	errorCallbackFunc ErrorCallbackFunc
 	logger            Logger
 
 	g prometheus.Gatherer
@@ -109,8 +106,8 @@ type Logger interface {
 	Println(v ...interface{})
 }
 
-// CallbackFunc is a special type for callback functions
-type CallbackFunc func(error)
+// ErrorCallbackFunc is a special type for callback functions
+type ErrorCallbackFunc func(error)
 
 // NewBridge returns a pointer to a new Bridge struct.
 func NewBridge(c *Config) (*Bridge, error) {
@@ -179,17 +176,16 @@ func (b *Bridge) Run(ctx context.Context) {
 // Push pushes Prometheus metrics to the configured Graphite server.
 func (b *Bridge) Push() error {
 	err := b.push()
+	if b.errorCallbackFunc != nil {
+		b.errorCallbackFunc(err)
+	}
 	switch b.errorHandling {
 	case AbortOnError:
 		return err
 	case ContinueOnError:
 		if b.logger != nil {
 			b.logger.Println("continue on error:", err)
 		}
-	case CallbackOnError:
-		if b.errorCallbackFunc != nil {
-			b.errorCallbackFunc(err)
-		}
 	}
 	return nil
 }

prometheus/graphite/bridge_test.go

@@ -477,16 +477,11 @@ func TestErrorHandling(t *testing.T) {
 		{
 			errorHandling:    ContinueOnError,
 			receivedError:    nil,
-			interceptedError: nil,
+			interceptedError: &net.OpError{},
 		},
 		{
 			errorHandling:    AbortOnError,
 			receivedError:    &net.OpError{},
-			interceptedError: nil,
-		},
-		{
-			errorHandling:    CallbackOnError,
-			receivedError:    nil,
 			interceptedError: &net.OpError{},
 		},
 	}