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history.go
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history.go
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// Copyright 2017 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"
"strconv"
"github.com/gorilla/mux"
"github.com/juju/errors"
"github.com/pingcap/pd/server"
"github.com/pingcap/pd/server/core"
"github.com/unrolled/render"
)
var errUnknownOperatorKind = errors.New("Unknown operator kind")
type historyHandler struct {
*server.Handler
r *render.Render
}
func newHistoryHandler(handler *server.Handler, r *render.Render) *historyHandler {
return &historyHandler{
Handler: handler,
r: r,
}
}
func (h *historyHandler) GetOperators(w http.ResponseWriter, r *http.Request) {
ops, err := h.GetHistoryOperators()
if err != nil {
h.r.JSON(w, http.StatusInternalServerError, err.Error())
return
}
h.r.JSON(w, http.StatusOK, ops)
}
func (h *historyHandler) GetOperatorsOfKind(w http.ResponseWriter, r *http.Request) {
k := mux.Vars(r)["kind"]
l := mux.Vars(r)["limit"]
limit, err := strconv.Atoi(l)
if err != nil {
h.r.JSON(w, http.StatusInternalServerError, err.Error())
return
}
if limit <= 0 {
h.r.JSON(w, http.StatusOK, nil)
return
}
kind := core.ParseResourceKind(k)
if kind == core.UnKnownKind {
h.r.JSON(w, http.StatusInternalServerError, errUnknownOperatorKind.Error())
return
}
ops, err := h.GetHistoryOperatorsOfKind(kind)
if err != nil {
h.r.JSON(w, http.StatusInternalServerError, err.Error())
return
}
if limit > len(ops) {
limit = len(ops)
}
h.r.JSON(w, http.StatusOK, ops[:limit])
}