mirror of
https://codeberg.org/forgejo/forgejo
synced 2024-11-25 03:06:10 +01:00
30181d459d
* Wrap the code indexer In order to prevent a data race in the code indexer it must be wrapped with a holder otherwise it is possible to Search/Index on an incompletely initialised indexer, and search will fail with a nil pointer until the repository indexer is initialised. Further a completely initialised repository indexer should not be closed until Termination otherwise actions in Hammer/Shutdown phases could block or be lost. Finally, there is a complex dance of shutdown etiquette should the index initialisation fail. This PR restores that. * Always return err if closed whilst waiting Co-authored-by: techknowlogick <matti@mdranta.net>
95 lines
1.8 KiB
Go
95 lines
1.8 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
|
|
// Use of this source code is governed by a MIT-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package code
|
|
|
|
import (
|
|
"fmt"
|
|
"sync"
|
|
)
|
|
|
|
var (
|
|
indexer = newWrappedIndexer()
|
|
)
|
|
|
|
// ErrWrappedIndexerClosed is the error returned if the indexer was closed before it was ready
|
|
var ErrWrappedIndexerClosed = fmt.Errorf("Indexer closed before ready")
|
|
|
|
type wrappedIndexer struct {
|
|
internal Indexer
|
|
lock sync.RWMutex
|
|
cond *sync.Cond
|
|
closed bool
|
|
}
|
|
|
|
func newWrappedIndexer() *wrappedIndexer {
|
|
w := &wrappedIndexer{}
|
|
w.cond = sync.NewCond(w.lock.RLocker())
|
|
return w
|
|
}
|
|
|
|
func (w *wrappedIndexer) set(indexer Indexer) {
|
|
w.lock.Lock()
|
|
defer w.lock.Unlock()
|
|
if w.closed {
|
|
// Too late!
|
|
indexer.Close()
|
|
}
|
|
w.internal = indexer
|
|
w.cond.Broadcast()
|
|
}
|
|
|
|
func (w *wrappedIndexer) get() (Indexer, error) {
|
|
w.lock.RLock()
|
|
defer w.lock.RUnlock()
|
|
if w.internal == nil {
|
|
if w.closed {
|
|
return nil, ErrWrappedIndexerClosed
|
|
}
|
|
w.cond.Wait()
|
|
if w.closed {
|
|
return nil, ErrWrappedIndexerClosed
|
|
}
|
|
}
|
|
return w.internal, nil
|
|
}
|
|
|
|
func (w *wrappedIndexer) Index(repoID int64) error {
|
|
indexer, err := w.get()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return indexer.Index(repoID)
|
|
}
|
|
|
|
func (w *wrappedIndexer) Delete(repoID int64) error {
|
|
indexer, err := w.get()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return indexer.Delete(repoID)
|
|
}
|
|
|
|
func (w *wrappedIndexer) Search(repoIDs []int64, keyword string, page, pageSize int) (int64, []*SearchResult, error) {
|
|
indexer, err := w.get()
|
|
if err != nil {
|
|
return 0, nil, err
|
|
}
|
|
return indexer.Search(repoIDs, keyword, page, pageSize)
|
|
|
|
}
|
|
|
|
func (w *wrappedIndexer) Close() {
|
|
w.lock.Lock()
|
|
defer w.lock.Unlock()
|
|
if w.closed {
|
|
return
|
|
}
|
|
w.closed = true
|
|
w.cond.Broadcast()
|
|
if w.internal != nil {
|
|
w.internal.Close()
|
|
}
|
|
}
|