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scheduler.go
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scheduler.go
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// Copyright 2016 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package api
import (
"net/http"
"github.com/gorilla/mux"
"github.com/pingcap/pd/server"
"github.com/unrolled/render"
)
type schedulerHandler struct {
*server.Handler
r *render.Render
}
func newSchedulerHandler(handler *server.Handler, r *render.Render) *schedulerHandler {
return &schedulerHandler{
Handler: handler,
r: r,
}
}
func (h *schedulerHandler) List(w http.ResponseWriter, r *http.Request) {
schedulers, err := h.GetSchedulers()
if err != nil {
h.r.JSON(w, http.StatusInternalServerError, err.Error())
return
}
h.r.JSON(w, http.StatusOK, schedulers)
}
func (h *schedulerHandler) Post(w http.ResponseWriter, r *http.Request) {
var input map[string]interface{}
if err := readJSON(r.Body, &input); err != nil {
h.r.JSON(w, http.StatusInternalServerError, err.Error())
return
}
name, ok := input["name"].(string)
if !ok {
h.r.JSON(w, http.StatusBadRequest, "missing scheduler name")
return
}
switch name {
case "balance-leader-scheduler":
if err := h.AddBalanceLeaderScheduler(); err != nil {
h.r.JSON(w, http.StatusInternalServerError, err.Error())
return
}
case "balance-hot-region-scheduler":
if err := h.AddBalanceHotRegionScheduler(); err != nil {
h.r.JSON(w, http.StatusInternalServerError, err.Error())
return
}
case "balance-region-scheduler":
if err := h.AddBalanceRegionScheduler(); err != nil {
h.r.JSON(w, http.StatusInternalServerError, err.Error())
return
}
case "grant-leader-scheduler":
storeID, ok := input["store_id"].(float64)
if !ok {
h.r.JSON(w, http.StatusBadRequest, "missing store id")
return
}
if err := h.AddGrantLeaderScheduler(uint64(storeID)); err != nil {
h.r.JSON(w, http.StatusInternalServerError, err.Error())
return
}
case "evict-leader-scheduler":
storeID, ok := input["store_id"].(float64)
if !ok {
h.r.JSON(w, http.StatusBadRequest, "missing store id")
return
}
if err := h.AddEvictLeaderScheduler(uint64(storeID)); err != nil {
h.r.JSON(w, http.StatusInternalServerError, err.Error())
return
}
case "shuffle-leader-scheduler":
if err := h.AddShuffleLeaderScheduler(); err != nil {
h.r.JSON(w, http.StatusInternalServerError, err.Error())
return
}
case "shuffle-region-scheduler":
if err := h.AddShuffleRegionScheduler(); err != nil {
h.r.JSON(w, http.StatusInternalServerError, err.Error())
return
}
default:
h.r.JSON(w, http.StatusBadRequest, "unknown scheduler")
return
}
h.r.JSON(w, http.StatusOK, nil)
}
func (h *schedulerHandler) Delete(w http.ResponseWriter, r *http.Request) {
name := mux.Vars(r)["name"]
if err := h.RemoveScheduler(name); err != nil {
h.r.JSON(w, http.StatusInternalServerError, err.Error())
return
}
h.r.JSON(w, http.StatusOK, nil)
}