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add.go
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add.go
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// Copyright (c) 2018 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package namespace
import (
"bytes"
"fmt"
"net/http"
nsproto "github.com/m3db/m3/src/dbnode/generated/proto/namespace"
"github.com/m3db/m3/src/dbnode/storage/namespace"
"github.com/m3db/m3/src/query/api/v1/handler"
"github.com/m3db/m3/src/query/generated/proto/admin"
"github.com/m3db/m3/src/query/util/logging"
clusterclient "github.com/m3db/m3cluster/client"
"github.com/gogo/protobuf/jsonpb"
"go.uber.org/zap"
)
const (
// AddURL is the url for the namespace add handler.
AddURL = handler.RoutePrefixV1 + "/namespace"
// AddHTTPMethod is the HTTP method used with this resource.
AddHTTPMethod = http.MethodPost
)
// AddHandler is the handler for namespace adds.
type AddHandler Handler
// NewAddHandler returns a new instance of AddHandler.
func NewAddHandler(client clusterclient.Client) *AddHandler {
return &AddHandler{client: client}
}
func (h *AddHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
logger := logging.WithContext(ctx)
md, rErr := h.parseRequest(r)
if rErr != nil {
logger.Error("unable to parse request", zap.Any("error", rErr))
handler.Error(w, rErr.Inner(), rErr.Code())
return
}
nsRegistry, err := h.Add(md)
if err != nil {
logger.Error("unable to get namespace", zap.Any("error", err))
handler.Error(w, err, http.StatusBadRequest)
return
}
resp := &admin.NamespaceGetResponse{
Registry: &nsRegistry,
}
handler.WriteProtoMsgJSONResponse(w, resp, logger)
}
func (h *AddHandler) parseRequest(r *http.Request) (*admin.NamespaceAddRequest, *handler.ParseError) {
defer r.Body.Close()
rBody, err := handler.DurationToNanosBytes(r.Body)
if err != nil {
return nil, handler.NewParseError(err, http.StatusBadRequest)
}
addReq := new(admin.NamespaceAddRequest)
if err := jsonpb.Unmarshal(bytes.NewReader(rBody), addReq); err != nil {
return nil, handler.NewParseError(err, http.StatusBadRequest)
}
return addReq, nil
}
// Add adds a namespace.
func (h *AddHandler) Add(addReq *admin.NamespaceAddRequest) (nsproto.Registry, error) {
var emptyReg = nsproto.Registry{}
md, err := namespace.ToMetadata(addReq.Name, addReq.Options)
if err != nil {
return emptyReg, fmt.Errorf("unable to get metadata: %v", err)
}
store, err := h.client.KV()
if err != nil {
return emptyReg, err
}
currentMetadata, version, err := Metadata(store)
if err != nil {
return emptyReg, err
}
nsMap, err := namespace.NewMap(append(currentMetadata, md))
if err != nil {
return emptyReg, err
}
protoRegistry := namespace.ToProto(nsMap)
_, err = store.CheckAndSet(M3DBNodeNamespacesKey, version, protoRegistry)
if err != nil {
return emptyReg, fmt.Errorf("failed to add namespace: %v", err)
}
return *protoRegistry, nil
}