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service.go
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service.go
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// Copyright (c) 2017 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 r2
import (
"encoding/json"
"errors"
"fmt"
"net/http"
"github.com/m3db/m3/src/ctl/auth"
mservice "github.com/m3db/m3/src/ctl/service"
"github.com/m3db/m3/src/ctl/service/r2/store"
"github.com/m3db/m3/src/x/clock"
"github.com/m3db/m3/src/x/instrument"
"github.com/gorilla/mux"
"github.com/uber-go/tally"
"go.uber.org/zap"
)
const (
namespacePath = "/namespaces"
mappingRulePrefix = "mapping-rules"
rollupRulePrefix = "rollup-rules"
namespaceIDVar = "namespaceID"
ruleIDVar = "ruleID"
)
var (
namespacePrefix = fmt.Sprintf("%s/{%s}", namespacePath, namespaceIDVar)
validateRuleSetPath = fmt.Sprintf("%s/{%s}/ruleset/validate", namespacePath, namespaceIDVar)
updateRuleSetPath = fmt.Sprintf("%s/{%s}/ruleset/update", namespacePath, namespaceIDVar)
mappingRuleRoot = fmt.Sprintf("%s/%s", namespacePrefix, mappingRulePrefix)
mappingRuleWithIDPath = fmt.Sprintf("%s/{%s}", mappingRuleRoot, ruleIDVar)
mappingRuleHistoryPath = fmt.Sprintf("%s/history", mappingRuleWithIDPath)
rollupRuleRoot = fmt.Sprintf("%s/%s", namespacePrefix, rollupRulePrefix)
rollupRuleWithIDPath = fmt.Sprintf("%s/{%s}", rollupRuleRoot, ruleIDVar)
rollupRuleHistoryPath = fmt.Sprintf("%s/history", rollupRuleWithIDPath)
errNilRequest = errors.New("Nil request")
)
type serviceMetrics struct {
fetchNamespaces instrument.MethodMetrics
fetchNamespace instrument.MethodMetrics
createNamespace instrument.MethodMetrics
deleteNamespace instrument.MethodMetrics
validateRuleSet instrument.MethodMetrics
fetchMappingRule instrument.MethodMetrics
createMappingRule instrument.MethodMetrics
updateMappingRule instrument.MethodMetrics
deleteMappingRule instrument.MethodMetrics
fetchMappingRuleHistory instrument.MethodMetrics
fetchRollupRule instrument.MethodMetrics
createRollupRule instrument.MethodMetrics
updateRollupRule instrument.MethodMetrics
deleteRollupRule instrument.MethodMetrics
fetchRollupRuleHistory instrument.MethodMetrics
updateRuleSet instrument.MethodMetrics
}
func newServiceMetrics(scope tally.Scope, samplingRate float64) serviceMetrics {
return serviceMetrics{
fetchNamespaces: instrument.NewMethodMetrics(scope, "fetchNamespaces", samplingRate),
fetchNamespace: instrument.NewMethodMetrics(scope, "fetchNamespace", samplingRate),
createNamespace: instrument.NewMethodMetrics(scope, "createNamespace", samplingRate),
deleteNamespace: instrument.NewMethodMetrics(scope, "deleteNamespace", samplingRate),
validateRuleSet: instrument.NewMethodMetrics(scope, "validateRuleSet", samplingRate),
fetchMappingRule: instrument.NewMethodMetrics(scope, "fetchMappingRule", samplingRate),
createMappingRule: instrument.NewMethodMetrics(scope, "createMappingRule", samplingRate),
updateMappingRule: instrument.NewMethodMetrics(scope, "updateMappingRule", samplingRate),
deleteMappingRule: instrument.NewMethodMetrics(scope, "deleteMappingRule", samplingRate),
fetchMappingRuleHistory: instrument.NewMethodMetrics(scope, "fetchMappingRuleHistory", samplingRate),
fetchRollupRule: instrument.NewMethodMetrics(scope, "fetchRollupRule", samplingRate),
createRollupRule: instrument.NewMethodMetrics(scope, "createRollupRule", samplingRate),
updateRollupRule: instrument.NewMethodMetrics(scope, "updateRollupRule", samplingRate),
deleteRollupRule: instrument.NewMethodMetrics(scope, "deleteRollupRule", samplingRate),
fetchRollupRuleHistory: instrument.NewMethodMetrics(scope, "fetchRollupRuleHistory", samplingRate),
updateRuleSet: instrument.NewMethodMetrics(scope, "updateRuleSet", samplingRate),
}
}
var authorizationRegistry = map[route]auth.AuthorizationType{
// This validation route should only require read access.
{path: validateRuleSetPath, method: http.MethodPost}: auth.ReadOnlyAuthorization,
}
func defaultAuthorizationTypeForHTTPMethod(method string) (auth.AuthorizationType, error) {
switch method {
case http.MethodGet:
return auth.ReadOnlyAuthorization, nil
case http.MethodPost, http.MethodPut, http.MethodDelete, http.MethodPatch:
return auth.ReadWriteAuthorization, nil
default:
return auth.UnknownAuthorization, fmt.Errorf("unknown authorization type for method %s", method)
}
}
func registerRoute(router *mux.Router, path, method string, h r2Handler, hf r2HandlerFunc) error {
authType, exists := authorizationRegistry[route{path: path, method: method}]
if !exists {
var err error
if authType, err = defaultAuthorizationTypeForHTTPMethod(method); err != nil {
return fmt.Errorf("could not register route for method %s and path %s, error: %v", method, path, err)
}
}
fn := h.wrap(authType, hf)
router.Handle(path, fn).Methods(method)
return nil
}
// service handles all of the endpoints for r2.
type service struct {
rootPrefix string
store store.Store
authService auth.HTTPAuthService
logger *zap.Logger
nowFn clock.NowFn
metrics serviceMetrics
}
// NewService creates a new r2 service using a given store.
func NewService(
rootPrefix string,
authService auth.HTTPAuthService,
store store.Store,
iOpts instrument.Options,
clockOpts clock.Options,
) mservice.Service {
return &service{
rootPrefix: rootPrefix,
store: store,
authService: authService,
logger: iOpts.Logger(),
nowFn: clockOpts.NowFn(),
metrics: newServiceMetrics(iOpts.MetricsScope(), iOpts.MetricsSamplingRate()),
}
}
func (s *service) URLPrefix() string { return s.rootPrefix }
func (s *service) RegisterHandlers(router *mux.Router) error {
routeWithHandlers := []struct {
route route
handler r2HandlerFunc
}{
// Namespaces actions.
{route: route{path: namespacePath, method: http.MethodGet}, handler: s.fetchNamespaces},
{route: route{path: namespacePath, method: http.MethodPost}, handler: s.createNamespace},
// Ruleset actions.
{route: route{path: namespacePrefix, method: http.MethodGet}, handler: s.fetchNamespace},
{route: route{path: namespacePrefix, method: http.MethodDelete}, handler: s.deleteNamespace},
{route: route{path: validateRuleSetPath, method: http.MethodPost}, handler: s.validateRuleSet},
{route: route{path: updateRuleSetPath, method: http.MethodPost}, handler: s.updateRuleSet},
// Mapping Rule actions.
{route: route{path: mappingRuleRoot, method: http.MethodPost}, handler: s.createMappingRule},
{route: route{path: mappingRuleWithIDPath, method: http.MethodGet}, handler: s.fetchMappingRule},
{route: route{path: mappingRuleWithIDPath, method: http.MethodPut}, handler: s.updateMappingRule},
{route: route{path: mappingRuleWithIDPath, method: http.MethodDelete}, handler: s.deleteMappingRule},
// Mapping Rule history.
{route: route{path: mappingRuleHistoryPath, method: http.MethodGet}, handler: s.fetchMappingRuleHistory},
// Rollup Rule actions.
{route: route{path: rollupRuleRoot, method: http.MethodPost}, handler: s.createRollupRule},
{route: route{path: rollupRuleWithIDPath, method: http.MethodGet}, handler: s.fetchRollupRule},
{route: route{path: rollupRuleWithIDPath, method: http.MethodPut}, handler: s.updateRollupRule},
{route: route{path: rollupRuleWithIDPath, method: http.MethodDelete}, handler: s.deleteRollupRule},
// Rollup Rule history.
{route: route{path: rollupRuleHistoryPath, method: http.MethodGet}, handler: s.fetchRollupRuleHistory},
}
h := r2Handler{s.logger, s.authService}
for _, rh := range routeWithHandlers {
if err := registerRoute(router, rh.route.path, rh.route.method, h, rh.handler); err != nil {
return err
}
}
s.logger.Info("registered rules endpoints")
return nil
}
func (s *service) Close() { s.store.Close() }
type routeFunc func(s *service, r *http.Request) (data interface{}, err error)
func (s *service) handleRoute(rf routeFunc, r *http.Request, m instrument.MethodMetrics) (interface{}, error) {
if r == nil {
return nil, errNilRequest
}
start := s.nowFn()
data, err := rf(s, r)
dur := s.nowFn().Sub(start)
m.ReportSuccessOrError(err, dur)
s.logRequest(r, err)
if err != nil {
return nil, err
}
return data, nil
}
func (s *service) logRequest(r *http.Request, err error) {
logger := s.logger.With(
zap.String("httpMethod", r.Method),
zap.String("routePath", r.RequestURI),
)
if err != nil {
logger.With(zap.Error(err)).Error("request error")
return
}
logger.Info("request success")
}
func (s *service) sendResponse(w http.ResponseWriter, statusCode int, data interface{}) error {
if j, err := json.Marshal(data); err == nil {
return sendResponse(w, j, statusCode)
}
return writeAPIResponse(w, http.StatusInternalServerError, "could not create response object")
}
func (s *service) fetchNamespaces(w http.ResponseWriter, r *http.Request) error {
data, err := s.handleRoute(fetchNamespaces, r, s.metrics.fetchNamespaces)
if err != nil {
return err
}
return s.sendResponse(w, http.StatusOK, data)
}
func (s *service) fetchNamespace(w http.ResponseWriter, r *http.Request) error {
data, err := s.handleRoute(fetchNamespace, r, s.metrics.fetchNamespace)
if err != nil {
return err
}
return s.sendResponse(w, http.StatusOK, data)
}
func (s *service) createNamespace(w http.ResponseWriter, r *http.Request) error {
data, err := s.handleRoute(createNamespace, r, s.metrics.createNamespace)
if err != nil {
return err
}
return s.sendResponse(w, http.StatusCreated, data)
}
func (s *service) validateRuleSet(w http.ResponseWriter, r *http.Request) error {
data, err := s.handleRoute(validateRuleSet, r, s.metrics.validateRuleSet)
if err != nil {
return err
}
return writeAPIResponse(w, http.StatusOK, data.(string))
}
func (s *service) updateRuleSet(w http.ResponseWriter, r *http.Request) error {
data, err := s.handleRoute(updateRuleSet, r, s.metrics.updateRuleSet)
if err != nil {
return err
}
return s.sendResponse(w, http.StatusOK, data)
}
func (s *service) deleteNamespace(w http.ResponseWriter, r *http.Request) error {
data, err := s.handleRoute(deleteNamespace, r, s.metrics.deleteNamespace)
if err != nil {
return err
}
return writeAPIResponse(w, http.StatusOK, data.(string))
}
func (s *service) fetchMappingRule(w http.ResponseWriter, r *http.Request) error {
data, err := s.handleRoute(fetchMappingRule, r, s.metrics.fetchMappingRule)
if err != nil {
return err
}
return s.sendResponse(w, http.StatusOK, data)
}
func (s *service) createMappingRule(w http.ResponseWriter, r *http.Request) error {
data, err := s.handleRoute(createMappingRule, r, s.metrics.createMappingRule)
if err != nil {
return err
}
return s.sendResponse(w, http.StatusCreated, data)
}
func (s *service) updateMappingRule(w http.ResponseWriter, r *http.Request) error {
data, err := s.handleRoute(updateMappingRule, r, s.metrics.updateMappingRule)
if err != nil {
return err
}
return s.sendResponse(w, http.StatusOK, data)
}
func (s *service) deleteMappingRule(w http.ResponseWriter, r *http.Request) error {
data, err := s.handleRoute(deleteMappingRule, r, s.metrics.deleteMappingRule)
if err != nil {
return err
}
return writeAPIResponse(w, http.StatusOK, data.(string))
}
func (s *service) fetchMappingRuleHistory(w http.ResponseWriter, r *http.Request) error {
data, err := s.handleRoute(fetchMappingRuleHistory, r, s.metrics.fetchMappingRuleHistory)
if err != nil {
return err
}
return s.sendResponse(w, http.StatusOK, data)
}
func (s *service) fetchRollupRule(w http.ResponseWriter, r *http.Request) error {
data, err := s.handleRoute(fetchRollupRule, r, s.metrics.fetchRollupRule)
if err != nil {
return err
}
return s.sendResponse(w, http.StatusOK, data)
}
func (s *service) createRollupRule(w http.ResponseWriter, r *http.Request) error {
data, err := s.handleRoute(createRollupRule, r, s.metrics.createRollupRule)
if err != nil {
return err
}
return s.sendResponse(w, http.StatusCreated, data)
}
func (s *service) updateRollupRule(w http.ResponseWriter, r *http.Request) error {
data, err := s.handleRoute(updateRollupRule, r, s.metrics.updateRollupRule)
if err != nil {
return err
}
return s.sendResponse(w, http.StatusOK, data)
}
func (s *service) deleteRollupRule(w http.ResponseWriter, r *http.Request) error {
data, err := s.handleRoute(deleteRollupRule, r, s.metrics.deleteRollupRule)
if err != nil {
return err
}
return writeAPIResponse(w, http.StatusOK, data.(string))
}
func (s *service) fetchRollupRuleHistory(w http.ResponseWriter, r *http.Request) error {
data, err := s.handleRoute(fetchRollupRuleHistory, r, s.metrics.fetchRollupRuleHistory)
if err != nil {
return err
}
return s.sendResponse(w, http.StatusOK, data)
}
type route struct {
path string
method string
}
func (s *service) newUpdateOptions(r *http.Request) (store.UpdateOptions, error) {
uOpts := store.NewUpdateOptions()
author, err := s.authService.GetUser(r.Context())
if err != nil {
return uOpts, nil
}
return uOpts.SetAuthor(author), nil
}