From 598fde642c5a947c6aee16dc620c48bae2973629 Mon Sep 17 00:00:00 2001
From: Min Pae <sputnik13@gmail.com>
Date: Thu, 26 Oct 2017 12:25:14 -0700
Subject: [PATCH] reverting bufpool

---
 bufpool/bufpool.go           | 33 +++++++++++----------------------
 http_post.go                 |  6 ++----
 services/alert/handlers.go   |  4 ++--
 services/httppost/service.go |  7 ++-----
 4 files changed, 17 insertions(+), 33 deletions(-)

diff --git a/bufpool/bufpool.go b/bufpool/bufpool.go
index e827ef711..261af9003 100644
--- a/bufpool/bufpool.go
+++ b/bufpool/bufpool.go
@@ -2,39 +2,28 @@ package bufpool
 
 import (
 	"bytes"
-	"io"
 	"sync"
 )
 
 type Pool struct {
-	p *sync.Pool
+	p sync.Pool
 }
 
 func New() *Pool {
-	syncPool := sync.Pool{}
-	syncPool.New = func() interface{} {
-		return &closingBuffer{
-			pool: &syncPool,
-		}
-	}
-
 	return &Pool{
-		p: &syncPool,
+		p: sync.Pool{
+			New: func() interface{} {
+				return new(bytes.Buffer)
+			},
+		},
 	}
 }
 
-func (p *Pool) Get() *closingBuffer {
-	return p.p.Get().(*closingBuffer)
-}
-
-type closingBuffer struct {
-	bytes.Buffer
-	io.Closer
-	pool *sync.Pool
+func (p *Pool) Get() *bytes.Buffer {
+	return p.p.Get().(*bytes.Buffer)
 }
 
-func (cb *closingBuffer) Close() error {
-	cb.Reset()
-	cb.pool.Put(cb)
-	return nil
+func (p *Pool) Put(b *bytes.Buffer) {
+	b.Reset()
+	p.p.Put(b)
 }
diff --git a/http_post.go b/http_post.go
index 92883e225..5ad0d2c9b 100644
--- a/http_post.go
+++ b/http_post.go
@@ -9,8 +9,8 @@ import (
 	"sync"
 	"time"
 
+	"bytes"
 	"context"
-	"github.com/influxdata/kapacitor/bufpool"
 	"github.com/influxdata/kapacitor/edge"
 	"github.com/influxdata/kapacitor/keyvalue"
 	"github.com/influxdata/kapacitor/models"
@@ -24,7 +24,6 @@ type HTTPPostNode struct {
 	c        *pipeline.HTTPPostNode
 	endpoint *httppost.Endpoint
 	mu       sync.RWMutex
-	bp       *bufpool.Pool
 	timeout  time.Duration
 	hc       *http.Client
 }
@@ -35,7 +34,6 @@ func newHTTPPostNode(et *ExecutingTask, n *pipeline.HTTPPostNode, d NodeDiagnost
 	hn := &HTTPPostNode{
 		node:    node{Node: n, et: et, diag: d},
 		c:       n,
-		bp:      bufpool.New(),
 		timeout: n.Timeout,
 	}
 
@@ -164,7 +162,7 @@ func (n *HTTPPostNode) doPost(row *models.Row) int {
 }
 
 func (n *HTTPPostNode) postRow(row *models.Row) (*http.Response, error) {
-	body := n.bp.Get()
+	body := new(bytes.Buffer)
 
 	var contentType string
 	if n.endpoint.RowTemplate() != nil {
diff --git a/services/alert/handlers.go b/services/alert/handlers.go
index fe57c5871..dc5ed92a7 100644
--- a/services/alert/handlers.go
+++ b/services/alert/handlers.go
@@ -110,7 +110,7 @@ func NewExecHandler(c ExecHandlerConfig, d HandlerDiagnostic) alert.Handler {
 
 func (h *execHandler) Handle(event alert.Event) {
 	buf := h.bp.Get()
-	defer buf.Close()
+	defer h.bp.Put(buf)
 	ad := event.AlertData()
 
 	err := json.NewEncoder(buf).Encode(ad)
@@ -156,7 +156,7 @@ func NewTCPHandler(c TCPHandlerConfig, d HandlerDiagnostic) alert.Handler {
 
 func (h *tcpHandler) Handle(event alert.Event) {
 	buf := h.bp.Get()
-	defer buf.Close()
+	defer h.bp.Put(buf)
 	ad := event.AlertData()
 
 	err := json.NewEncoder(buf).Encode(ad)
diff --git a/services/httppost/service.go b/services/httppost/service.go
index db80f6403..87edf3184 100644
--- a/services/httppost/service.go
+++ b/services/httppost/service.go
@@ -15,7 +15,6 @@ import (
 
 	"context"
 	"github.com/influxdata/kapacitor/alert"
-	"github.com/influxdata/kapacitor/bufpool"
 	"github.com/influxdata/kapacitor/keyvalue"
 	"github.com/pkg/errors"
 )
@@ -242,8 +241,7 @@ type HandlerConfig struct {
 }
 
 type handler struct {
-	s  *Service
-	bp *bufpool.Pool
+	s *Service
 
 	endpoint *Endpoint
 	headers  map[string]string
@@ -264,7 +262,6 @@ func (s *Service) Handler(c HandlerConfig, ctx ...keyvalue.T) alert.Handler {
 	}
 	return &handler{
 		s:               s,
-		bp:              bufpool.New(),
 		endpoint:        e,
 		diag:            s.diag.WithContext(ctx...),
 		headers:         c.Headers,
@@ -290,7 +287,7 @@ func (h *handler) Handle(event alert.Event) {
 	var err error
 
 	// Construct the body of the HTTP request
-	body := h.bp.Get()
+	body := new(bytes.Buffer)
 	ad := event.AlertData()
 
 	var contentType string