func InitStaticRouter(staticDir, staticETag string,
	mgr *cbgt.Manager) *mux.Router {
	prefix := ""
	if mgr != nil {
		prefix = mgr.Options()["urlPrefix"]
	}

	hfsStaticX := http.FileServer(assetFS())

	router := mux.NewRouter()
	router.StrictSlash(true)

	router.Handle(prefix+"/",
		http.RedirectHandler(prefix+"/index.html", 302))
	router.Handle(prefix+"/index.html",
		http.RedirectHandler(prefix+"/staticx/index.html", 302))
	router.Handle(prefix+"/static/partials/index/start.html",
		http.RedirectHandler(prefix+"/staticx/partials/index/start.html", 302))

	router = rest.InitStaticRouterEx(router,
		staticDir, staticETag, []string{
			prefix + "/indexes",
			prefix + "/nodes",
			prefix + "/monitor",
			prefix + "/manage",
			prefix + "/logs",
			prefix + "/debug",
		}, http.RedirectHandler(prefix+"/staticx/index.html", 302), mgr)

	router.PathPrefix(prefix + "/staticx/").Handler(
		http.StripPrefix(prefix+"/staticx/", hfsStaticX))

	return router
}

func BlevePIndexImplInitRouter(r *mux.Router, phase string,
	mgr *cbgt.Manager) {
	prefix := ""
	if mgr != nil {
		prefix = mgr.Options()["urlPrefix"]
	}

	if phase == "static.before" {
		staticBleveMapping := http.FileServer(bleveMappingUI.AssetFS())

		r.PathPrefix(prefix + "/static-bleve-mapping/").Handler(
			http.StripPrefix(prefix+"/static-bleve-mapping/",
				staticBleveMapping))

		bleveMappingUI.RegisterHandlers(r, prefix+"/api")
	}

	if phase == "manager.after" {
		// Using standard bleveHttp handlers for /api/pindex-bleve endpoints.
		//
		listIndexesHandler := bleveHttp.NewListIndexesHandler()
		r.Handle(prefix+"/api/pindex-bleve",
			listIndexesHandler).Methods("GET")

		getIndexHandler := bleveHttp.NewGetIndexHandler()
		getIndexHandler.IndexNameLookup = rest.PIndexNameLookup
		r.Handle(prefix+"/api/pindex-bleve/{pindexName}",
			getIndexHandler).Methods("GET")

		docCountHandler := bleveHttp.NewDocCountHandler("")
		docCountHandler.IndexNameLookup = rest.PIndexNameLookup
		r.Handle(prefix+"/api/pindex-bleve/{pindexName}/count",
			docCountHandler).Methods("GET")

		searchHandler := bleveHttp.NewSearchHandler("")
		searchHandler.IndexNameLookup = rest.PIndexNameLookup
		r.Handle(prefix+"/api/pindex-bleve/{pindexName}/query",
			searchHandler).Methods("POST")

		docGetHandler := bleveHttp.NewDocGetHandler("")
		docGetHandler.IndexNameLookup = rest.PIndexNameLookup
		docGetHandler.DocIDLookup = rest.DocIDLookup
		r.Handle(prefix+"/api/pindex-bleve/{pindexName}/doc/{docID}",
			docGetHandler).Methods("GET")

		debugDocHandler := bleveHttp.NewDebugDocumentHandler("")
		debugDocHandler.IndexNameLookup = rest.PIndexNameLookup
		debugDocHandler.DocIDLookup = rest.DocIDLookup
		r.Handle(prefix+"/api/pindex-bleve/{pindexName}/docDebug/{docID}",
			debugDocHandler).Methods("GET")

		listFieldsHandler := bleveHttp.NewListFieldsHandler("")
		listFieldsHandler.IndexNameLookup = rest.PIndexNameLookup
		r.Handle(prefix+"/api/pindex-bleve/{pindexName}/fields",
			listFieldsHandler).Methods("GET")
	}
}

// InitStaticRouterEx is like InitStaticRouter, but with optional
// manager parameter for more options.
func InitStaticRouterEx(r *mux.Router, staticDir, staticETag string,
	pages []string, pagesHandler http.Handler,
	mgr *cbgt.Manager) *mux.Router {
	prefix := ""
	if mgr != nil {
		prefix = mgr.Options()["urlPrefix"]
	}

	PIndexTypesInitRouter(r, "static.before", mgr)

	var s http.FileSystem
	if staticDir != "" {
		if _, err := os.Stat(staticDir); err == nil {
			log.Printf("http: serving assets from staticDir: %s", staticDir)
			s = http.Dir(staticDir)
		}
	}
	if s == nil {
		log.Printf("http: serving assets from embedded data")
		s = AssetFS()
	}

	r.PathPrefix(prefix + "/static/").Handler(
		http.StripPrefix(prefix+"/static/",
			ETagFileHandler{http.FileServer(s), staticETag}))

	// Bootstrap UI insists on loading templates from this path.
	r.PathPrefix(prefix + "/template/").Handler(
		http.StripPrefix(prefix+"/template/",
			ETagFileHandler{http.FileServer(s), staticETag}))

	// If client ask for any of the pages, redirect.
	for _, p := range pages {
		if pagesHandler != nil {
			r.PathPrefix(p).Handler(pagesHandler)
		} else {
			r.PathPrefix(p).Handler(RewriteURL("/", http.FileServer(s)))
		}
	}

	r.Handle(prefix+"/index.html",
		http.RedirectHandler(prefix+"/static/index.html", 302))
	r.Handle(prefix+"/",
		http.RedirectHandler(prefix+"/static/index.html", 302))

	PIndexTypesInitRouter(r, "static.after", mgr)

	return r
}

func NewQueryHandler(mgr *cbgt.Manager) *QueryHandler {
	slowQueryLogTimeout := time.Duration(0)
	slowQueryLogTimeoutV := mgr.Options()["slowQueryLogTimeout"]
	if slowQueryLogTimeoutV != "" {
		d, err := time.ParseDuration(slowQueryLogTimeoutV)
		if err == nil {
			slowQueryLogTimeout = d
		}
	}

	return &QueryHandler{
		mgr:                 mgr,
		slowQueryLogTimeout: slowQueryLogTimeout,
	}
}

// Returns a bleve.IndexAlias that represents all the PIndexes for the
// index, including perhaps bleve remote client PIndexes.
//
// TODO: Perhaps need a tighter check around indexUUID, as the current
// implementation might have a race where old pindexes with a matching
// (but invalid) indexUUID might be hit.
//
// TODO: If this returns an error, perhaps the caller somewhere up the
// chain should close the cancelCh to help stop any other inflight
// activities.
func bleveIndexAlias(mgr *cbgt.Manager, indexName, indexUUID string,
	ensureCanRead bool, consistencyParams *cbgt.ConsistencyParams,
	cancelCh <-chan bool) (bleve.IndexAlias, error) {
	planPIndexNodeFilter := cbgt.PlanPIndexNodeOk
	if ensureCanRead {
		planPIndexNodeFilter = cbgt.PlanPIndexNodeCanRead
	}

	localPIndexes, remotePlanPIndexes, err :=
		mgr.CoveringPIndexes(indexName, indexUUID, planPIndexNodeFilter,
			"queries")
	if err != nil {
		return nil, fmt.Errorf("bleve: bleveIndexAlias, err: %v", err)
	}

	alias := bleve.NewIndexAlias()

	for _, remotePlanPIndex := range remotePlanPIndexes {
		baseURL := "http://" + remotePlanPIndex.NodeDef.HostPort +
			"/api/pindex/" + remotePlanPIndex.PlanPIndex.Name
		alias.Add(&IndexClient{
			QueryURL:    baseURL + "/query",
			CountURL:    baseURL + "/count",
			Consistency: consistencyParams,
			// TODO: Propagate auth to remote client.
		})
	}

	// TODO: Should kickoff remote queries concurrently before we wait.

	err = cbgt.ConsistencyWaitGroup(indexName, consistencyParams,
		cancelCh, localPIndexes,
		func(localPIndex *cbgt.PIndex) error {
			bindex, ok := localPIndex.Impl.(bleve.Index)
			if !ok || bindex == nil ||
				!strings.HasPrefix(localPIndex.IndexType, "bleve") {
				return fmt.Errorf("bleve: wrong type, localPIndex: %#v",
					localPIndex)
			}
			alias.Add(bindex)
			return nil
		})
	if err != nil {
		return nil, err
	}

	return alias, nil
}

func CheckAPIAuth(mgr *cbgt.Manager,
	w http.ResponseWriter, req *http.Request, path string) (allowed bool) {
	authType := ""
	if mgr != nil && mgr.Options() != nil {
		authType = mgr.Options()["authType"]
	}

	if authType == "" {
		return true
	}

	if authType != "cbauth" {
		return false
	}

	creds, err := cbauth.AuthWebCreds(req)
	if err != nil {
		http.Error(w, fmt.Sprintf("rest_auth: cbauth.AuthWebCreds,"+
			" err: %v ", err), 403)
		return false
	}

	perms, err := preparePerms(mgr, req, req.Method, path)
	if err != nil {
		http.Error(w, fmt.Sprintf("rest_auth: preparePerm,"+
			" err: %v ", err), 403)
		return false
	}

	for _, perm := range perms {
		allowed, err = creds.IsAllowed(perm)
		if err != nil {
			http.Error(w, fmt.Sprintf("rest_auth: cbauth.IsAllowed,"+
				" err: %v ", err), 403)
			return false
		}

		if !allowed {
			cbauth.SendForbidden(w, perm)
			return false
		}
	}

	return true
}

func (k *kvChangeIndex) retrieveCBGTPartitions() (partitionDef base.PartitionStorageSet, err error) {

	var manager *cbgt.Manager
	if k.context != nil {
		manager = k.context.BucketSpec.CbgtContext.Manager
	} else {
		return nil, errors.New("Unable to retrieve CBGT partitions - no database context")
	}

	if manager == nil {
		return nil, errors.New("Unable to retrieve CBGT partitions - no CBGT manager")
	}

	_, planPIndexesByName, _ := manager.GetPlanPIndexes(true)
	indexName := k.context.GetCBGTIndexNameForBucket(k.context.Bucket)
	pindexes := planPIndexesByName[indexName]

	for _, pIndex := range pindexes {
		vbStrings := strings.Split(pIndex.SourcePartitions, ",")
		// convert string vbNos to uint16
		vbNos := make([]uint16, len(vbStrings))
		for i := 0; i < len(vbStrings); i++ {
			vbNumber, err := strconv.ParseUint(vbStrings[i], 10, 16)
			if err != nil {
				base.LogFatal("Error creating index partition definition - unable to parse vbucket number %s as integer:%v", vbStrings[i], err)
			}
			vbNos[i] = uint16(vbNumber)
		}
		entry := base.PartitionStorage{
			Index: uint16(0), // see below for index assignment
			Uuid:  pIndex.UUID,
			VbNos: vbNos,
		}
		partitionDef = append(partitionDef, entry)
	}

	// NOTE: the ordering of pindexes returned by manager.GetPlanPIndexes isn't fixed (it's doing a map iteration somewhere).
	//    The mapping from UUID to VbNos will always be consistent.  Sorting by UUID to maintain a consistent index ordering,
	// then assigning index values.
	partitionDef.Sort()
	for i := 0; i < len(partitionDef); i++ {
		partitionDef[i].Index = uint16(i)
	}
	return partitionDef, nil
}

func bleveIndexTargets(mgr *cbgt.Manager, indexName, indexUUID string,
	ensureCanRead bool, consistencyParams *cbgt.ConsistencyParams,
	cancelCh <-chan bool, collector BleveIndexCollector) error {
	planPIndexNodeFilter := cbgt.PlanPIndexNodeOk
	if ensureCanRead {
		planPIndexNodeFilter = cbgt.PlanPIndexNodeCanRead
	}

	localPIndexes, remotePlanPIndexes, err :=
		mgr.CoveringPIndexes(indexName, indexUUID, planPIndexNodeFilter,
			"queries")
	if err != nil {
		return fmt.Errorf("bleve: bleveIndexTargets, err: %v", err)
	}

	prefix := mgr.Options()["urlPrefix"]

	for _, remotePlanPIndex := range remotePlanPIndexes {
		baseURL := "http://" + remotePlanPIndex.NodeDef.HostPort +
			prefix + "/api/pindex/" + remotePlanPIndex.PlanPIndex.Name
		collector.Add(&IndexClient{
			name:        fmt.Sprintf("IndexClient - %s", baseURL),
			QueryURL:    baseURL + "/query",
			CountURL:    baseURL + "/count",
			Consistency: consistencyParams,
			// TODO: Propagate auth to remote client.
		})
	}

	// TODO: Should kickoff remote queries concurrently before we wait.

	return cbgt.ConsistencyWaitGroup(indexName, consistencyParams,
		cancelCh, localPIndexes,
		func(localPIndex *cbgt.PIndex) error {
			bindex, ok := localPIndex.Impl.(bleve.Index)
			if !ok || bindex == nil ||
				!strings.HasPrefix(localPIndex.IndexType, "fulltext-index") {
				return fmt.Errorf("bleve: wrong type, localPIndex: %#v",
					localPIndex)
			}
			collector.Add(bindex)
			return nil
		})
}

// NewRESTRouter creates a mux.Router initialized with the REST API
// and web UI routes.  See also InitStaticRouter and InitRESTRouter if
// you need finer control of the router initialization.
func NewRESTRouter(versionMain string, mgr *cbgt.Manager,
	staticDir, staticETag string, mr *cbgt.MsgRing,
	assetDir func(name string) ([]string, error),
	asset func(name string) ([]byte, error)) (
	*mux.Router, map[string]RESTMeta, error) {
	prefix := mgr.Options()["urlPrefix"]

	r := mux.NewRouter()
	r.StrictSlash(true)

	r = InitStaticRouterEx(r,
		staticDir, staticETag, []string{
			prefix + "/indexes",
			prefix + "/nodes",
			prefix + "/monitor",
			prefix + "/manage",
			prefix + "/logs",
			prefix + "/debug",
		}, nil, mgr)

	return InitRESTRouter(r, versionMain, mgr,
		staticDir, staticETag, mr, assetDir, asset)
}

func InitStaticRouter(staticDir, staticETag string,
	mgr *cbgt.Manager) *mux.Router {

	router := mux.NewRouter()
	router.StrictSlash(true)

	showUI := true
	if mgr != nil && mgr.Options()["hideUI"] != "" {
		hideUI, err := strconv.ParseBool(mgr.Options()["hideUI"])
		if err == nil && hideUI {
			showUI = false
		}
	}

	if showUI {
		prefix := ""
		if mgr != nil {
			prefix = mgr.Options()["urlPrefix"]
		}

		hfsStaticX := http.FileServer(assetFS())

		router.Handle(prefix+"/",
			http.RedirectHandler(prefix+"/index.html", 302))
		router.Handle(prefix+"/index.html",
			http.RedirectHandler(prefix+"/staticx/index.html", 302))
		router.Handle(prefix+"/static/partials/index/start.html",
			http.RedirectHandler(prefix+"/staticx/partials/index/start.html", 302))

		router = rest.InitStaticRouterEx(router,
			staticDir, staticETag, []string{
				prefix + "/indexes",
				prefix + "/nodes",
				prefix + "/monitor",
				prefix + "/manage",
				prefix + "/logs",
				prefix + "/debug",
			}, http.RedirectHandler(prefix+"/staticx/index.html", 302), mgr)

		router.PathPrefix(prefix + "/staticx/").Handler(
			http.StripPrefix(prefix+"/staticx/", hfsStaticX))
	}

	return router
}

// WriteManagerStatsJSON writes JSON stats for a manager, and is
// optionally focus'able on a particular indexName.
func WriteManagerStatsJSON(mgr *cbgt.Manager, w io.Writer,
	indexName string) error {
	feeds, pindexes := mgr.CurrentMaps()
	feedNames := make([]string, 0, len(feeds))
	for feedName := range feeds {
		feedNames = append(feedNames, feedName)
	}
	sort.Strings(feedNames)

	pindexNames := make([]string, 0, len(pindexes))
	for pindexName := range pindexes {
		pindexNames = append(pindexNames, pindexName)
	}
	sort.Strings(pindexNames)

	feedStats := make(map[string][]byte)
	for _, feedName := range feedNames {
		var buf bytes.Buffer
		err := feeds[feedName].Stats(&buf)
		if err != nil {
			return fmt.Errorf("feed stats err: %v", err)
		}
		feedStats[feedName] = buf.Bytes()
	}

	pindexStats := make(map[string][]byte)
	for _, pindexName := range pindexNames {
		var buf bytes.Buffer
		err := pindexes[pindexName].Dest.Stats(&buf)
		if err != nil {
			return fmt.Errorf("pindex stats err: %v", err)
		}
		pindexStats[pindexName] = buf.Bytes()
	}

	w.Write(cbgt.JsonOpenBrace)

	first := true
	w.Write(statsFeedsPrefix)
	for _, feedName := range feedNames {
		if indexName == "" || indexName == feeds[feedName].IndexName() {
			if !first {
				w.Write(cbgt.JsonComma)
			}
			first = false
			w.Write(statsNamePrefix)
			w.Write([]byte(feedName))
			w.Write(statsNameSuffix)
			w.Write(feedStats[feedName])
		}
	}
	w.Write(cbgt.JsonCloseBraceComma)

	first = true
	w.Write(statsPIndexesPrefix)
	for _, pindexName := range pindexNames {
		if indexName == "" || indexName == pindexes[pindexName].IndexName {
			if !first {
				w.Write(cbgt.JsonComma)
			}
			first = false
			w.Write(statsNamePrefix)
			w.Write([]byte(pindexName))
			w.Write(statsNameSuffix)
			w.Write(pindexStats[pindexName])
		}
	}
	w.Write(cbgt.JsonCloseBrace)

	if indexName == "" {
		w.Write(statsManagerPrefix)
		var mgrStats cbgt.ManagerStats
		mgr.StatsCopyTo(&mgrStats)
		mgrStatsJSON, err := json.Marshal(&mgrStats)
		if err == nil && len(mgrStatsJSON) > 0 {
			w.Write(mgrStatsJSON)
		} else {
			w.Write(cbgt.JsonNULL)
		}
	}

	w.Write(cbgt.JsonCloseBrace)

	return nil
}

func (k *kvChangeIndex) initIndexPartitions() (*base.IndexPartitions, error) {

	k.indexPartitionsLock.Lock()
	defer k.indexPartitionsLock.Unlock()

	// Check if it's been initialized while we waited for the lock
	if k.indexPartitions != nil {
		return k.indexPartitions, nil
	}

	var partitionDef []base.PartitionStorage
	// First attempt to load from the bucket
	value, _, err := k.reader.indexReadBucket.GetRaw(base.KIndexPartitionKey)
	indexExpvars.Add("get_indexPartitionMap", 1)
	if err == nil {
		if err = json.Unmarshal(value, &partitionDef); err != nil {
			return nil, err
		}
	}

	// If unable to load from index bucket - attempt to initialize based on cbgt partitions
	if partitionDef == nil {
		var manager *cbgt.Manager
		if k.context != nil {
			manager = k.context.BucketSpec.CbgtContext.Manager
		} else {
			return nil, errors.New("Unable to determine partition map for index - not found in index, and no database context")
		}

		if manager == nil {
			return nil, errors.New("Unable to determine partition map for index - not found in index, and no CBGT manager")
		}

		_, planPIndexesByName, _ := manager.GetPlanPIndexes(true)
		indexName := k.context.GetCBGTIndexNameForBucket(k.context.Bucket)
		pindexes := planPIndexesByName[indexName]

		for index, pIndex := range pindexes {
			vbStrings := strings.Split(pIndex.SourcePartitions, ",")
			// convert string vbNos to uint16
			vbNos := make([]uint16, len(vbStrings))
			for i := 0; i < len(vbStrings); i++ {
				vbNumber, err := strconv.ParseUint(vbStrings[i], 10, 16)
				if err != nil {
					base.LogFatal("Error creating index partition definition - unable to parse vbucket number %s as integer:%v", vbStrings[i], err)
				}
				vbNos[i] = uint16(vbNumber)
			}
			entry := base.PartitionStorage{
				Index: uint16(index),
				Uuid:  pIndex.UUID,
				VbNos: vbNos,
			}
			partitionDef = append(partitionDef, entry)
		}

		// Persist to bucket
		value, err = json.Marshal(partitionDef)
		if err != nil {
			return nil, err
		}
		k.reader.indexReadBucket.SetRaw(base.KIndexPartitionKey, 0, value)
	}

	// Create k.indexPartitions based on partitionDef
	k.indexPartitions = base.NewIndexPartitions(partitionDef)
	return k.indexPartitions, nil
}

// InitRESTRouter initializes a mux.Router with REST API routes with
// extra option.
func InitRESTRouterEx(r *mux.Router, versionMain string,
	mgr *cbgt.Manager, staticDir, staticETag string,
	mr *cbgt.MsgRing,
	assetDir func(name string) ([]string, error),
	asset func(name string) ([]byte, error),
	options map[string]interface{}) (
	*mux.Router, map[string]RESTMeta, error) {
	var authHandler func(http.Handler) http.Handler

	mapRESTPathStats := map[string]*RESTPathStats{} // Keyed by path spec.

	if options != nil {
		if v, ok := options["auth"]; ok {
			authHandler, ok = v.(func(http.Handler) http.Handler)
			if !ok {
				return nil, nil, fmt.Errorf("rest: auth function invalid")
			}
		}

		if v, ok := options["mapRESTPathStats"]; ok {
			mapRESTPathStats, ok = v.(map[string]*RESTPathStats)
			if !ok {
				return nil, nil, fmt.Errorf("rest: mapRESTPathStats invalid")
			}
		}
	}

	prefix := mgr.Options()["urlPrefix"]

	PIndexTypesInitRouter(r, "manager.before", mgr)

	meta := map[string]RESTMeta{}

	handle := func(path string, method string, h http.Handler,
		opts map[string]string) {
		opts["_path"] = path
		if a, ok := h.(RESTOpts); ok {
			a.RESTOpts(opts)
		}
		prefixPath := prefix + path
		restMeta := RESTMeta{prefixPath, method, opts}
		meta[prefixPath+" "+RESTMethodOrds[method]+method] = restMeta
		h = &HandlerWithRESTMeta{
			h:         h,
			RESTMeta:  &restMeta,
			pathStats: mapRESTPathStats[path],
			focusName: PathFocusName(path),
		}
		if authHandler != nil {
			h = authHandler(h)
		}
		r.Handle(prefixPath, h).Methods(method).Name(prefixPath)
	}

	handle("/api/index", "GET", NewListIndexHandler(mgr),
		map[string]string{
			"_category":          "Indexing|Index definition",
			"_about":             `Returns all index definitions as JSON.`,
			"version introduced": "0.0.1",
		})
	handle("/api/index/{indexName}", "PUT", NewCreateIndexHandler(mgr),
		map[string]string{
			"_category":          "Indexing|Index definition",
			"_about":             `Creates/updates an index definition.`,
			"version introduced": "0.0.1",
		})
	handle("/api/index/{indexName}", "DELETE", NewDeleteIndexHandler(mgr),
		map[string]string{
			"_category":          "Indexing|Index definition",
			"_about":             `Deletes an index definition.`,
			"version introduced": "0.0.1",
		})
	handle("/api/index/{indexName}", "GET", NewGetIndexHandler(mgr),
		map[string]string{
			"_category":          "Indexing|Index definition",
			"_about":             `Returns the definition of an index as JSON.`,
			"version introduced": "0.0.1",
		})

	if mgr == nil || mgr.TagsMap() == nil || mgr.TagsMap()["queryer"] {
		handle("/api/index/{indexName}/count", "GET",
			NewCountHandler(mgr),
			map[string]string{
				"_category":          "Indexing|Index querying",
				"_about":             `Returns the count of indexed documents.`,
				"version introduced": "0.0.1",
			})
		handle("/api/index/{indexName}/query", "POST",
			NewQueryHandler(mgr,
				mapRESTPathStats["/api/index/{indexName}/query"]),
			map[string]string{
				"_category":          "Indexing|Index querying",
				"_about":             `Queries an index.`,
				"version introduced": "0.2.0",
			})
	}

	handle("/api/index/{indexName}/planFreezeControl/{op}", "POST",
//.........这里部分代码省略.........

// The indexName/indexUUID is for a user-defined index alias.
//
// TODO: One day support user-defined aliases for non-bleve indexes.
func bleveIndexAliasForUserIndexAlias(mgr *cbgt.Manager,
	indexName, indexUUID string, ensureCanRead bool,
	consistencyParams *cbgt.ConsistencyParams,
	cancelCh <-chan bool) (
	bleve.IndexAlias, error) {
	alias := bleve.NewIndexAlias()

	indexDefs, _, err := cbgt.CfgGetIndexDefs(mgr.Cfg())
	if err != nil {
		return nil, fmt.Errorf("alias: could not get indexDefs,"+
			" indexName: %s, err: %v", indexName, err)
	}

	num := 0

	var fillAlias func(aliasName, aliasUUID string) error

	fillAlias = func(aliasName, aliasUUID string) error {
		aliasDef := indexDefs.IndexDefs[aliasName]
		if aliasDef == nil {
			return fmt.Errorf("alias: could not get aliasDef,"+
				" aliasName: %s, indexName: %s",
				aliasName, indexName)
		}
		if aliasDef.Type != "alias" {
			return fmt.Errorf("alias: not alias type: %s,"+
				" aliasName: %s, indexName: %s",
				aliasDef.Type, aliasName, indexName)
		}
		if aliasUUID != "" &&
			aliasUUID != aliasDef.UUID {
			return fmt.Errorf("alias: mismatched aliasUUID: %s,"+
				" aliasDef.UUID: %s, aliasName: %s, indexName: %s",
				aliasUUID, aliasDef.UUID, aliasName, indexName)
		}

		params := AliasParams{}
		err := json.Unmarshal([]byte(aliasDef.Params), &params)
		if err != nil {
			return fmt.Errorf("alias: could not parse aliasDef.Params: %s,"+
				" aliasName: %s, indexName: %s",
				aliasDef.Params, aliasName, indexName)
		}

		for targetName, targetSpec := range params.Targets {
			if num > maxAliasTargets {
				return fmt.Errorf("alias: too many alias targets,"+
					" perhaps there's a cycle,"+
					" aliasName: %s, indexName: %s",
					aliasName, indexName)
			}
			targetDef := indexDefs.IndexDefs[targetName]
			if targetDef == nil {
				return fmt.Errorf("alias: the alias depends upon"+
					" a target index that does not exist,"+
					" targetName: %q, aliasName: %q",
					targetName, aliasName)
			}
			if targetSpec.IndexUUID != "" &&
				targetSpec.IndexUUID != targetDef.UUID {
				return fmt.Errorf("alias: mismatched targetSpec.UUID: %s,"+
					" targetDef.UUID: %s, targetName: %s,"+
					" aliasName: %s, indexName: %s",
					targetSpec.IndexUUID, targetDef.UUID, targetName,
					aliasName, indexName)
			}

			// TODO: Convert to registered callbacks instead of if-else-if.
			if targetDef.Type == "alias" {
				err = fillAlias(targetName, targetSpec.IndexUUID)
				if err != nil {
					return err
				}
			} else if strings.HasPrefix(targetDef.Type, "bleve") {
				subAlias, err := bleveIndexAlias(mgr, targetName,
					targetSpec.IndexUUID, ensureCanRead,
					consistencyParams, cancelCh)
				if err != nil {
					return err
				}
				alias.Add(subAlias)
				num += 1
			} else {
				return fmt.Errorf("alias: unsupported target type: %s,"+
					" targetName: %s, aliasName: %s, indexName: %s",
					targetDef.Type, targetName, aliasName, indexName)
			}
		}

		return nil
	}

	err = fillAlias(indexName, indexUUID)
	if err != nil {
		return nil, err
	}

//.........这里部分代码省略.........

func testCreateIndex(t *testing.T,
	mgr *cbgt.Manager,
	indexName string,
	params map[string]string,
	waitUntilEmptyCfgEventsIndexDefs func()) {
	sourceType := "primary"
	if params["sourceType"] != "" {
		sourceType = params["sourceType"]
	}
	if params[indexName+".sourceType"] != "" {
		sourceType = params[indexName+".sourceType"]
	}

	sourceName := "default"
	if params["sourceName"] != "" {
		sourceName = params["sourceName"]
	}
	if params[indexName+".sourceName"] != "" {
		sourceName = params[indexName+".sourceName"]
	}

	sourceUUID := ""
	if params["sourceUUID"] != "" {
		sourceUUID = params["sourceUUID"]
	}
	if params[indexName+".sourceUUID"] != "" {
		sourceUUID = params[indexName+".sourceUUID"]
	}

	sourceParams := `{"numPartitions":4}`
	if params["sourceParams"] != "" {
		sourceParams = params["sourceParams"]
	}
	if params[indexName+".sourceParams"] != "" {
		sourceParams = params[indexName+".sourceParams"]
	}

	indexType := "blackhole"
	if params["indexType"] != "" {
		indexType = params["indexType"]
	}
	if params[indexName+".indexType"] != "" {
		indexType = params[indexName+".indexType"]
	}

	indexParams := ""
	if params["indexParams"] != "" {
		indexParams = params["indexParams"]
	}
	if params[indexName+".indexParams"] != "" {
		indexParams = params[indexName+".indexParams"]
	}

	prevIndexUUID := ""
	if params["prevIndexUUID"] != "" {
		prevIndexUUID = params["prevIndexUUID"]
	}
	if params[indexName+".prevIndexUUID"] != "" {
		prevIndexUUID = params[indexName+".prevIndexUUID"]
	}

	planParams := cbgt.PlanParams{
		MaxPartitionsPerPIndex: 1,
	}

	waitUntilEmptyCfgEventsIndexDefs()

	err := mgr.CreateIndex(
		sourceType, sourceName, sourceUUID, sourceParams,
		indexType, indexName, indexParams,
		planParams,
		prevIndexUUID)
	if err != nil {
		t.Errorf("expected no err, got: %#v", err)
	}

	waitUntilEmptyCfgEventsIndexDefs()
}

// InitRESTRouter initializes a mux.Router with REST API
// routes.
func InitRESTRouter(r *mux.Router, versionMain string,
	mgr *cbgt.Manager, staticDir, staticETag string,
	mr *cbgt.MsgRing,
	assetDir func(name string) ([]string, error),
	asset func(name string) ([]byte, error)) (
	*mux.Router, map[string]RESTMeta, error) {
	PIndexTypesInitRouter(r, "manager.before")

	meta := map[string]RESTMeta{}
	handle := func(path string, method string, h http.Handler,
		opts map[string]string) {
		if a, ok := h.(RESTOpts); ok {
			a.RESTOpts(opts)
		}
		meta[path+" "+RESTMethodOrds[method]+method] =
			RESTMeta{path, method, opts}
		r.Handle(path, h).Methods(method)
	}
	handleFunc := func(path string, method string, h http.HandlerFunc,
		opts map[string]string) {
		meta[path+" "+RESTMethodOrds[method]+method] =
			RESTMeta{path, method, opts}
		r.HandleFunc(path, h).Methods(method)
	}

	handle("/api/index", "GET", NewListIndexHandler(mgr),
		map[string]string{
			"_category":          "Indexing|Index definition",
			"_about":             `Returns all index definitions as JSON.`,
			"version introduced": "0.0.1",
		})
	handle("/api/index/{indexName}", "PUT", NewCreateIndexHandler(mgr),
		map[string]string{
			"_category":          "Indexing|Index definition",
			"_about":             `Creates/updates an index definition.`,
			"version introduced": "0.0.1",
		})
	handle("/api/index/{indexName}", "DELETE", NewDeleteIndexHandler(mgr),
		map[string]string{
			"_category":          "Indexing|Index definition",
			"_about":             `Deletes an index definition.`,
			"version introduced": "0.0.1",
		})
	handle("/api/index/{indexName}", "GET", NewGetIndexHandler(mgr),
		map[string]string{
			"_category":          "Indexing|Index definition",
			"_about":             `Returns the definition of an index as JSON.`,
			"version introduced": "0.0.1",
		})

	if mgr == nil || mgr.TagsMap() == nil || mgr.TagsMap()["queryer"] {
		handle("/api/index/{indexName}/count", "GET",
			NewCountHandler(mgr),
			map[string]string{
				"_category":          "Indexing|Index querying",
				"_about":             `Returns the count of indexed documents.`,
				"version introduced": "0.0.1",
			})
		handle("/api/index/{indexName}/query", "POST",
			NewQueryHandler(mgr),
			map[string]string{
				"_category":          "Indexing|Index querying",
				"_about":             `Queries an index.`,
				"version introduced": "0.2.0",
			})
	}

	handle("/api/index/{indexName}/planFreezeControl/{op}", "POST",
		NewIndexControlHandler(mgr, "planFreeze", map[string]bool{
			"freeze":   true,
			"unfreeze": true,
		}),
		map[string]string{
			"_category": "Indexing|Index management",
			"_about":    `Freeze the assignment of index partitions to nodes.`,
			"param: op": "required, string, URL path parameter\n\n" +
				`Allowed values for op are "freeze" or "unfreeze".`,
			"version introduced": "0.0.1",
		})
	handle("/api/index/{indexName}/ingestControl/{op}", "POST",
		NewIndexControlHandler(mgr, "write", map[string]bool{
			"pause":  true,
			"resume": true,
		}),
		map[string]string{
			"_category": "Indexing|Index management",
			"_about": `Pause index updates and maintenance (no more
                          ingesting document mutations).`,
			"param: op": "required, string, URL path parameter\n\n" +
				`Allowed values for op are "pause" or "resume".`,
			"version introduced": "0.0.1",
		})
	handle("/api/index/{indexName}/queryControl/{op}", "POST",
		NewIndexControlHandler(mgr, "read", map[string]bool{
			"allow":    true,
			"disallow": true,
		}),
		map[string]string{
//.........这里部分代码省略.........

func initNsServerCaching(mgr *cbgt.Manager) {
	runSourcePartitionSeqsOnce.Do(func() {
		go RunSourcePartitionSeqs(mgr.Options(), nil)
		go RunRecentInfoCache(mgr)
	})
}

func RunRecentInfoCache(mgr *cbgt.Manager) {
	cfg := mgr.Cfg()

	cfgChangedCh := make(chan struct{}, 10)

	go func() { // Debounce cfg events to feed into the cfgChangedCh.
		ech := make(chan cbgt.CfgEvent)
		cfg.Subscribe(cbgt.PLAN_PINDEXES_KEY, ech)

		for {
			<-ech // First, wait for a cfg event.

			debounceTimeCh := time.After(500 * time.Millisecond)

		DEBOUNCE_LOOP:
			for {
				select {
				case <-ech:
					// NO-OP when there are more, spammy cfg events.

				case <-debounceTimeCh:
					break DEBOUNCE_LOOP
				}
			}

			cfgChangedCh <- struct{}{}
		}
	}()

	tickCh := time.Tick(1 * time.Minute)

	for {
		var nodeDefs *cbgt.NodeDefs
		var planPIndexes *cbgt.PlanPIndexes

		indexDefs, indexDefsMap, err := mgr.GetIndexDefs(false)
		if err == nil {
			nodeDefs, _, err = cbgt.CfgGetNodeDefs(cfg, cbgt.NODE_DEFS_WANTED)
			if err == nil {
				planPIndexes, _, err = cbgt.CfgGetPlanPIndexes(cfg)
			}
		}

		rd := &recentInfo{
			indexDefs:    indexDefs,
			indexDefsMap: indexDefsMap,
			nodeDefs:     nodeDefs,
			planPIndexes: planPIndexes,
			err:          err,
		}

		runtime.ReadMemStats(&rd.memStats)

	REUSE_CACHE:
		for {
			select {
			case <-cfgChangedCh:
				break REUSE_CACHE

			case <-tickCh:
				break REUSE_CACHE

			case recentInfoCh <- rd:
				if rd.err != nil {
					break REUSE_CACHE
				}
			}
		}
	}
}

func QueryBlevePIndexImpl(mgr *cbgt.Manager, indexName, indexUUID string,
	req []byte, res io.Writer) error {
	queryCtlParams := cbgt.QueryCtlParams{
		Ctl: cbgt.QueryCtl{
			Timeout: cbgt.QUERY_CTL_DEFAULT_TIMEOUT_MS,
		},
	}

	err := json.Unmarshal(req, &queryCtlParams)
	if err != nil {
		return fmt.Errorf("bleve: QueryBlevePIndexImpl"+
			" parsing queryCtlParams, req: %s, err: %v", req, err)
	}

	searchRequest := &bleve.SearchRequest{}

	err = json.Unmarshal(req, searchRequest)
	if err != nil {
		return fmt.Errorf("bleve: QueryBlevePIndexImpl"+
			" parsing searchRequest, req: %s, err: %v", req, err)
	}

	err = searchRequest.Query.Validate()
	if err != nil {
		return err
	}

	v, exists := mgr.Options()["bleveMaxResultWindow"]
	if exists {
		bleveMaxResultWindow, err := strconv.Atoi(v)
		if err != nil {
			return err
		}

		if searchRequest.From+searchRequest.Size > bleveMaxResultWindow {
			return fmt.Errorf("bleve: bleveMaxResultWindow exceeded,"+
				" from: %d, size: %d, bleveMaxResultWindow: %d",
				searchRequest.From, searchRequest.Size, bleveMaxResultWindow)
		}
	}

	cancelCh := cbgt.TimeoutCancelChan(queryCtlParams.Ctl.Timeout)

	alias, err := bleveIndexAlias(mgr, indexName, indexUUID, true,
		queryCtlParams.Ctl.Consistency, cancelCh)
	if err != nil {
		return err
	}

	doneCh := make(chan struct{})

	var searchResult *bleve.SearchResult

	go func() {
		searchResult, err = alias.Search(searchRequest)

		close(doneCh)
	}()

	select {
	case <-cancelCh:
		err = fmt.Errorf("pindex_bleve: query timeout")

	case <-doneCh:
		if searchResult != nil {
			rest.MustEncode(res, searchResult)
		}
	}

	return err
}