Add ACME store

Signed-off-by: Emile Vauge <emile@vauge.com>

safe/routine.go

@@ -1,8 +1,8 @@
 package safe
 
 import (
+	"github.com/containous/traefik/log"
 	"golang.org/x/net/context"
-	"log"
 	"runtime/debug"
 	"sync"
 )
@@ -26,18 +26,26 @@ type Pool struct {
 }
 
 // NewPool creates a Pool
-func NewPool(baseCtx context.Context) *Pool {
+func NewPool(parentCtx context.Context) *Pool {
+	baseCtx, _ := context.WithCancel(parentCtx)
 	ctx, cancel := context.WithCancel(baseCtx)
 	return &Pool{
+		baseCtx: baseCtx,
 		ctx:     ctx,
 		cancel:  cancel,
-		baseCtx: baseCtx,
 	}
 }
 
 // Ctx returns main context
 func (p *Pool) Ctx() context.Context {
-	return p.ctx
+	return p.baseCtx
+}
+
+//AddGoCtx adds a recoverable goroutine with a context without starting it
+func (p *Pool) AddGoCtx(goroutine routineCtx) {
+	p.lock.Lock()
+	p.routinesCtx = append(p.routinesCtx, goroutine)
+	p.lock.Unlock()
 }
 
 //GoCtx starts a recoverable goroutine with a context
@@ -71,6 +79,7 @@ func (p *Pool) Go(goroutine func(stop chan bool)) {
 // Stop stops all started routines, waiting for their termination
 func (p *Pool) Stop() {
 	p.lock.Lock()
+	defer p.lock.Unlock()
 	p.cancel()
 	for _, routine := range p.routines {
 		routine.stop <- true
@@ -79,12 +88,12 @@ func (p *Pool) Stop() {
 	for _, routine := range p.routines {
 		close(routine.stop)
 	}
-	p.lock.Unlock()
 }
 
-// Start starts all stoped routines
+// Start starts all stopped routines
 func (p *Pool) Start() {
 	p.lock.Lock()
+	defer p.lock.Unlock()
 	p.ctx, p.cancel = context.WithCancel(p.baseCtx)
 	for _, routine := range p.routines {
 		p.waitGroup.Add(1)
@@ -102,7 +111,6 @@ func (p *Pool) Start() {
 			p.waitGroup.Done()
 		})
 	}
-	p.lock.Unlock()
 }
 
 // Go starts a recoverable goroutine
@@ -123,6 +131,6 @@ func GoWithRecover(goroutine func(), customRecover func(err interface{})) {
 }
 
 func defaultRecoverGoroutine(err interface{}) {
-	log.Println(err)
+	log.Errorf("Error in Go routine: %s", err)
 	debug.PrintStack()
 }