/
rest_search.go
228 lines (202 loc) 路 5.95 KB
/
rest_search.go
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package actions
import (
"bytes"
"encoding/json"
"github.com/actumn/searchgoose/index"
"github.com/actumn/searchgoose/state"
"github.com/actumn/searchgoose/state/cluster"
"github.com/actumn/searchgoose/state/indices"
"github.com/actumn/searchgoose/state/transport"
"github.com/blevesearch/bleve"
"github.com/blevesearch/bleve/search/query"
"github.com/nqd/flat"
"github.com/sirupsen/logrus"
)
const (
SearchAction = "search"
)
type RestSearch struct {
clusterService *cluster.Service
indicesService *indices.Service
indexNameExpressionResolver *indices.NameExpressionResolver
transportService *transport.Service
}
type SearchRequest struct {
SearchIndex string
ShardId state.ShardId
SearchBody map[string]interface{}
}
func (r *SearchRequest) toBytes() []byte {
var buffer bytes.Buffer
enc := json.NewEncoder(&buffer)
if err := enc.Encode(r); err != nil {
logrus.Fatal(err)
}
return buffer.Bytes()
}
func SearchRequestFromBytes(b []byte) *SearchRequest {
buffer := bytes.NewBuffer(b)
decoder := json.NewDecoder(buffer)
var req SearchRequest
if err := decoder.Decode(&req); err != nil {
logrus.Fatal(err)
}
return &req
}
type SearchResultData struct {
Results *bleve.SearchResult
DocList []interface{}
MaxScore float64
Took int64
}
type SearchResponse struct {
SearchResult SearchResultData
}
func (r *SearchResponse) ToBytes() []byte {
var buffer bytes.Buffer
enc := json.NewEncoder(&buffer)
if err := enc.Encode(r); err != nil {
logrus.Fatal(err)
}
return buffer.Bytes()
}
func SearchResponseFromBytes(b []byte) *SearchResponse {
buffer := bytes.NewBuffer(b)
decoder := json.NewDecoder(buffer)
var req SearchResponse
if err := decoder.Decode(&req); err != nil {
logrus.Fatal(err)
}
return &req
}
func NewRestSearch(clusterService *cluster.Service, indicesService *indices.Service, indexNameExpressionResolver *indices.NameExpressionResolver, transportService *transport.Service) *RestSearch {
transportService.RegisterRequestHandler(SearchAction, func(channel transport.ReplyChannel, req []byte) {
request := SearchRequestFromBytes(req)
indexName := request.SearchIndex
body := request.SearchBody
var qType map[string]interface{}
if v, found := body["query"]; found {
qType = v.(map[string]interface{})
}
indexService, _ := indicesService.IndexService(request.ShardId.Index.Uuid)
indexShard, _ := indexService.Shard(request.ShardId.ShardId)
var q query.Query
var data SearchResultData
if k, found := qType["match"]; found {
q = index.SearchTypeMatch(k)
} else if k, found := qType["match_phrase"]; found {
q = index.SearchTypeMatchPhrase(k)
} else if _, found := qType["match_all"]; found {
q = bleve.NewMatchAllQuery()
} else if k, found := qType["prefix"]; found {
q = index.SearchTypePrefix(k)
} else if k, found := qType["fuzzy"]; found {
q = index.SearchTypeFuzzy(k)
} else if k, found := qType["bool"]; found {
q = index.SearchTypeBool(k)
} else if k, found := qType["range"]; found {
q = index.SearchTypeNumericRange(k)
} else {
logrus.Fatal("search error")
return
}
searchRequest := bleve.NewSearchRequest(q)
searchRequest.Highlight = bleve.NewHighlight()
//searchRequest.sort
r, err := indexShard.Search(searchRequest)
if err != nil {
logrus.Fatal(err)
}
data.Results = r
for _, hits := range data.Results.Hits {
doc, _ := indexShard.Get(hits.ID)
src, _ := flat.Unflatten(doc, nil)
hitJson := map[string]interface{}{
"_index": indexName,
"_type": "_doc",
"_id": hits.ID,
"_score": hits.Score,
"_source": src,
"highlight": hits.Fragments,
}
if data.MaxScore < hits.Score {
data.MaxScore = hits.Score
}
data.DocList = append(data.DocList, hitJson)
}
data.Took += data.Results.Took.Microseconds()
res := SearchResponse{data}
channel.SendMessage("", res.ToBytes())
})
return &RestSearch{
clusterService: clusterService,
indicesService: indicesService,
indexNameExpressionResolver: indexNameExpressionResolver,
transportService: transportService,
}
}
func (h *RestSearch) Handle(r *RestRequest, reply ResponseListener) {
indexExpression := r.PathParams["index"]
var body map[string]interface{}
if len(r.Body) == 0 {
body = map[string]interface{}{
"query": map[string]interface{}{
"match_all": map[string]interface{}{},
},
}
} else if err := json.Unmarshal(r.Body, &body); err != nil {
logrus.Fatal(err)
}
clusterState := h.clusterService.State()
indexName := h.indexNameExpressionResolver.ConcreteSingleIndex(*clusterState, indexExpression).Name
shardNum := clusterState.Metadata.Indices[indexName].NumberOfShards
totalResults := make(chan SearchResultData, shardNum)
for _, shardRouting := range clusterState.RoutingTable.IndicesRouting[indexName].Shards {
req := SearchRequest{
SearchIndex: indexName,
ShardId: shardRouting.ShardId,
SearchBody: body,
}
h.transportService.SendRequest(clusterState.Nodes.Nodes[shardRouting.Primary.CurrentNodeId], SearchAction, req.toBytes(), func(response []byte) {
totalResults <- SearchResponseFromBytes(response).SearchResult
})
}
var data struct {
DocList []interface{}
MaxScore float64
Took int64
}
for i := 0; i < shardNum; i++ {
d := <-totalResults
data.Took += d.Took
if d.DocList != nil {
for _, doc := range d.DocList {
data.DocList = append(data.DocList, doc)
}
}
if data.MaxScore <= d.MaxScore {
data.MaxScore = d.MaxScore
}
}
reply(RestResponse{
StatusCode: 200,
Body: map[string]interface{}{
"took": data.Took,
"timed_out": false,
"_shards": map[string]interface{}{
"total": shardNum,
"successful": shardNum,
"skipped": 0,
"failed": 0,
},
"hits": map[string]interface{}{
"total": map[string]interface{}{
"value": len(data.DocList),
"relation": "eq",
},
"max_score": data.MaxScore,
"hits": data.DocList,
},
},
})
}