forked from couchbase/cbgt
/
rest_meta.go
115 lines (95 loc) · 3.09 KB
/
rest_meta.go
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// Copyright (c) 2014 Couchbase, 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, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
// either express or implied. See the License for the specific language governing permissions
// and limitations under the License.
package rest
import (
"net/http"
"github.com/couchbase/cbgt"
)
// ManagerMetaHandler is a REST handler that returns metadata about a
// manager/node.
type ManagerMetaHandler struct {
mgr *cbgt.Manager
meta map[string]RESTMeta
}
func NewManagerMetaHandler(mgr *cbgt.Manager,
meta map[string]RESTMeta) *ManagerMetaHandler {
return &ManagerMetaHandler{mgr: mgr, meta: meta}
}
// MetaDesc represents a part of the JSON of a ManagerMetaHandler REST
// response.
type MetaDesc struct {
Description string `json:"description"`
StartSample interface{} `json:"startSample"`
StartSampleDocs map[string]string `json:"startSampleDocs"`
}
// MetaDescSource represents the source-type/feed-type parts of the
// JSON of a ManagerMetaHandler REST response.
type MetaDescSource MetaDesc
// MetaDescSource represents the index-type parts of
// the JSON of a ManagerMetaHandler REST response.
type MetaDescIndex struct {
MetaDesc
CanCount bool `json:"canCount"`
CanQuery bool `json:"canQuery"`
QuerySamples interface{} `json:"querySamples"`
QueryHelp string `json:"queryHelp"`
UI map[string]string `json:"ui"`
}
func (h *ManagerMetaHandler) ServeHTTP(
w http.ResponseWriter, req *http.Request) {
maxPartitionsPerPIndex := cbgt.DefaultMaxPartitionsPerPIndex(h.mgr)
startSamples := map[string]interface{}{
"planParams": &cbgt.PlanParams{
MaxPartitionsPerPIndex: maxPartitionsPerPIndex,
},
}
// Key is sourceType, value is description.
sourceTypes := map[string]*MetaDescSource{}
for sourceType, f := range cbgt.FeedTypes {
if f.Public {
sourceTypes[sourceType] = &MetaDescSource{
Description: f.Description,
StartSample: f.StartSample,
StartSampleDocs: f.StartSampleDocs,
}
}
}
// Key is indexType, value is description.
indexTypes := map[string]*MetaDescIndex{}
for indexType, t := range cbgt.PIndexImplTypes {
mdi := &MetaDescIndex{
MetaDesc: MetaDesc{
Description: t.Description,
StartSample: t.StartSample,
},
CanCount: t.Count != nil,
CanQuery: t.Query != nil,
QueryHelp: t.QueryHelp,
UI: t.UI,
}
if t.QuerySamples != nil {
mdi.QuerySamples = t.QuerySamples()
}
indexTypes[indexType] = mdi
}
r := map[string]interface{}{
"status": "ok",
"startSamples": startSamples,
"sourceTypes": sourceTypes,
"indexNameRE": cbgt.INDEX_NAME_REGEXP,
"indexTypes": indexTypes,
"refREST": h.meta,
}
for _, t := range cbgt.PIndexImplTypes {
if t.MetaExtra != nil {
t.MetaExtra(r)
}
}
MustEncode(w, r)
}