add more feture in admin

1，增加QPS的限制
2，增加任务
3，增加healthcheck

@@ -32,6 +32,8 @@ func init() {
 	BeeAdminApp.Route("/", AdminIndex)
 	BeeAdminApp.Route("/qps", QpsIndex)
 	BeeAdminApp.Route("/prof", ProfIndex)
+	BeeAdminApp.Route("/healthcheck", admin.Healthcheck)
+	BeeAdminApp.Route("/task", admin.TaskStatus)
 	FilterMonitorFunc = func(string, string, time.Duration) bool { return true }
 }
 
@@ -42,6 +44,7 @@ func AdminIndex(rw http.ResponseWriter, r *http.Request) {
 func QpsIndex(rw http.ResponseWriter, r *http.Request) {
 	admin.StatisticsMap.GetMap(rw)
 }
+
 func ProfIndex(rw http.ResponseWriter, r *http.Request) {
 	r.ParseForm()
 	command := r.Form.Get("command")

+package admin
+
+import (
+	"fmt"
+	"net/http"
+)
+
+//type DatabaseCheck struct {
+//}
+
+//func (dc *DatabaseCheck) Check() error {
+//	if dc.isConnected() {
+//		return nil
+//	} else {
+//		return errors.New("can't connect database")
+//	}
+//}
+
+//AddHealthCheck("database",&DatabaseCheck{})
+
+var AdminCheckList map[string]HealthChecker
+
+type HealthChecker interface {
+	Check() error
+}
+
+func AddHealthCheck(name string, hc HealthChecker) {
+	AdminCheckList[name] = hc
+}
+
+func Healthcheck(rw http.ResponseWriter, req *http.Request) {
+	for name, h := range AdminCheckList {
+		if err := h.Check(); err != nil {
+			fmt.Fprintf(rw, "%s : ok\n", name)
+		} else {
+			fmt.Fprintf(rw, "%s : %s\n", name, err.Error())
+		}
+	}
+}
+
+func init() {
+	AdminCheckList = make(map[string]HealthChecker)
+}

@@ -18,6 +18,7 @@ type Statistics struct {
 
 type UrlMap struct {
 	lock        sync.RWMutex
+	LengthLimit int //limit the urlmap's length if it's equal to 0 there's no limit
 	urlmap      map[string]map[string]*Statistics
 }
 
@@ -47,6 +48,9 @@ func (m *UrlMap) AddStatistics(requestMethod, requestUrl, requestController stri
 		}
 
 	} else {
+		if m.LengthLimit > 0 && m.LengthLimit <= len(m.urlmap) {
+			return
+		}
 		methodmap := make(map[string]*Statistics)
 		nb := &Statistics{
 			RequestUrl:        requestUrl,

 package admin
+
+import (
+	"fmt"
+	"net/http"
+)
+
+var AdminTaskList map[string]Tasker
+
+type Tasker interface {
+	GetStatus() string
+	Run() error
+}
+
+type Task struct {
+	Taskname string
+	Spec     Schedule
+	Errlist  []map[uint64]string //errtime:errinfo
+	ErrLimit int                 //max length for the errlist 0 stand for there' no limit
+}
+
+func (t *Task) GetStatus() string {
+	return ""
+}
+
+func (t *Task) Run() error {
+	return nil
+}
+
+func (t *Task) SetCron(spec string) {
+
+}
+
+type Schedule struct {
+	Second uint64
+	Minute uint64
+	Hour   uint64
+	DOM    uint64
+	Month  uint64
+	DOW    uint64
+}
+
+func StartTask() {
+
+}
+
+func StopTask() {
+
+}
+
+func AddTask(taskname string, t Tasker) {
+	AdminTaskList[taskname] = t
+}
+
+func TaskStatus(rw http.ResponseWriter, req *http.Request) {
+	for tname, t := range AdminTaskList {
+		fmt.Fprintf(rw, "%s:%s", tname, t.GetStatus())
+	}
+}
+
+//to run a Task by http from the querystring taskname
+//url like /task?taskname=sendmail
+func RunTask(rw http.ResponseWriter, req *http.Request) {
+	req.ParseForm()
+	taskname := req.Form.Get("taskname")
+	if t, ok := AdminTaskList[taskname]; ok {
+		err := t.Run()
+		if err != nil {
+			fmt.Fprintf(rw, "%v", err)
+		}
+		fmt.Fprintf(rw, "%s run success,Now the Status is %s", t.GetStatus())
+	} else {
+		fmt.Fprintf(rw, "there's no task which named:%s", taskname)
+	}
+}
+
+func init() {
+	AdminTaskList = make(map[string]Tasker)
+}