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// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package bleve
import (
"context"
"fmt"
"code.gitea.io/gitea/modules/indexer/internal"
"code.gitea.io/gitea/modules/log"
"github.com/blevesearch/bleve/v2"
"github.com/blevesearch/bleve/v2/mapping"
"github.com/ethantkoenig/rupture"
)
var _ internal.Indexer = &Indexer{}
// Indexer represents a basic bleve indexer implementation
type Indexer struct {
Indexer bleve.Index
indexDir string
version int
mappingGetter MappingGetter
}
type MappingGetter func() (mapping.IndexMapping, error)
func NewIndexer(indexDir string, version int, mappingGetter func() (mapping.IndexMapping, error)) *Indexer {
return &Indexer{
indexDir: indexDir,
version: version,
mappingGetter: mappingGetter,
}
}
// Init initializes the indexer
func (i *Indexer) Init(_ context.Context) (bool, error) {
if i == nil {
return false, fmt.Errorf("cannot init nil indexer")
}
if i.Indexer != nil {
return false, fmt.Errorf("indexer is already initialized")
}
indexer, version, err := openIndexer(i.indexDir, i.version)
if err != nil {
return false, err
}
if indexer != nil {
i.Indexer = indexer
return true, nil
}
if version != 0 {
log.Warn("Found older bleve index with version %d, Gitea will remove it and rebuild", version)
}
indexMapping, err := i.mappingGetter()
if err != nil {
return false, err
}
indexer, err = bleve.New(i.indexDir, indexMapping)
if err != nil {
return false, err
}
if err = rupture.WriteIndexMetadata(i.indexDir, &rupture.IndexMetadata{
Version: i.version,
}); err != nil {
return false, err
}
i.Indexer = indexer
return false, nil
}
// Ping checks if the indexer is available
func (i *Indexer) Ping(_ context.Context) error {
if i == nil {
return fmt.Errorf("cannot ping nil indexer")
}
if i.Indexer == nil {
return fmt.Errorf("indexer is not initialized")
}
return nil
}
func (i *Indexer) Close() {
if i == nil {
return
}
if err := i.Indexer.Close(); err != nil {
log.Error("Failed to close bleve indexer in %q: %v", i.indexDir, err)
}
i.Indexer = nil
}
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