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indexer.go
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/
indexer.go
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/*
* Copyright (c) 2019-2021. Abstrium SAS <team (at) pydio.com>
* This file is part of Pydio Cells.
*
* Pydio Cells is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Pydio Cells is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Pydio Cells. If not, see <http://www.gnu.org/licenses/>.
*
* The latest code can be found at <https://pydio.com>.
*/
// Package bleve implements the search engine using a Bleve indexer.
package dao
import (
"context"
"fmt"
"github.com/pydio/cells/v4/common"
"github.com/pydio/cells/v4/common/config"
"github.com/pydio/cells/v4/common/log"
"go.uber.org/zap"
"time"
"github.com/pydio/cells/v4/common/dao"
"github.com/pydio/cells/v4/common/nodes"
"github.com/pydio/cells/v4/common/nodes/meta"
"github.com/pydio/cells/v4/common/proto/tree"
"github.com/pydio/cells/v4/common/utils/configx"
)
var (
BatchSize = 2000
)
type Server struct {
Ctx context.Context
Router nodes.Handler
Engine dao.IndexDAO
configs configx.Values
inserts chan *tree.IndexableNode
deletes chan string
done chan bool
confChan chan configx.Values
nsProvider *meta.NsProvider
}
func NewEngine(ctx context.Context, indexer dao.IndexDAO, nsProvider *meta.NsProvider, configs configx.Values) (*Server, error) {
server := &Server{
Ctx: ctx,
Engine: indexer,
configs: configs,
inserts: make(chan *tree.IndexableNode),
deletes: make(chan string),
done: make(chan bool, 1),
confChan: make(chan configx.Values),
nsProvider: nsProvider,
}
go server.watchOperations()
go server.watchConfigs(ctx)
return server, nil
}
func (s *Server) watchOperations() {
batch := NewBatch(s.Ctx, s.nsProvider, BatchOptions{config: s.configs})
debounce := 1 * time.Second
timer := time.NewTimer(debounce)
defer func() {
timer.Stop()
}()
for {
select {
case n := <-s.inserts:
timer.Stop() // Call stop and create new one instead of Reset
timer = time.NewTimer(debounce)
batch.Index(n)
if batch.Size() >= BatchSize {
batch.Flush(s.Engine)
}
case d := <-s.deletes:
timer.Stop()
timer = time.NewTimer(debounce)
batch.Delete(d)
if batch.Size() >= BatchSize {
batch.Flush(s.Engine)
}
case <-timer.C:
batch.Flush(s.Engine)
case cf := <-s.confChan:
s.configs = cf
batch.options.config = cf
log.Logger(s.Ctx).Info("Changing search engine content indexation status", zap.Bool("i", cf.Val("indexContent").Bool()))
case <-s.Ctx.Done():
batch.Flush(s.Engine)
s.Engine.Close(s.Ctx)
close(s.done)
return
case <-s.done:
batch.Flush(s.Engine)
s.Engine.Close(s.Ctx)
return
}
}
}
func (s *Server) watchConfigs(ctx context.Context) {
serviceName := common.ServiceGrpcNamespace_ + common.ServiceSearch
watcher, e := config.Watch(configx.WithPath("services", serviceName))
if e != nil {
return
}
for {
_, err := watcher.Next()
if err != nil {
break
}
s.confChan <- config.Get("services", serviceName)
}
watcher.Stop()
}
func (s *Server) Close() error {
close(s.done)
return s.Engine.Close(s.Ctx)
}
func (s *Server) IndexNode(c context.Context, n *tree.Node, reloadCore bool, excludes map[string]struct{}) error {
if n.GetUuid() == "" {
return fmt.Errorf("missing uuid")
}
forceCore := false
if n.GetPath() == "" || n.GetType() == tree.NodeType_UNKNOWN {
forceCore = true
}
iNode := &tree.IndexableNode{
Node: *n,
ReloadCore: reloadCore || forceCore,
ReloadNs: !reloadCore,
}
s.inserts <- iNode
return nil
}
func (s *Server) DeleteNode(c context.Context, n *tree.Node) error {
s.deletes <- n.GetUuid()
return nil
}
func (s *Server) ClearIndex(ctx context.Context) error {
return s.Engine.Truncate(ctx, 0, func(s string) {
log.Logger(ctx).Info(s)
})
}
func (s *Server) SearchNodes(c context.Context, queryObject *tree.Query, from int32, size int32, resultChan chan *tree.Node, facets chan *tree.SearchFacet, doneChan chan bool) error {
accu := NewQueryCodec(s.Engine, s.configs, s.nsProvider)
searchResult, err := s.Engine.FindMany(c, queryObject, from, size, accu)
if err != nil {
doneChan <- true
return err
}
for res := range searchResult {
switch item := res.(type) {
case *tree.Node:
resultChan <- item
case *tree.SearchFacet:
facets <- item
default:
fmt.Println("unrecognized object")
}
}
if facetParser, ok := accu.(dao.FacetParser); ok {
for _, f := range facetParser.FlushCustomFacets() {
facets <- f.(*tree.SearchFacet)
}
}
doneChan <- true
return nil
}