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// 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 issues
import (
"encoding/json"
"time"
"code.gitea.io/gitea/modules/log"
"github.com/lunny/levelqueue"
)
var (
_ Queue = &LevelQueue{}
)
// LevelQueue implements a disk library queue
type LevelQueue struct {
indexer Indexer
queue *levelqueue.Queue
batchNumber int
}
// NewLevelQueue creates a ledis local queue
func NewLevelQueue(indexer Indexer, dataDir string, batchNumber int) (*LevelQueue, error) {
queue, err := levelqueue.Open(dataDir)
if err != nil {
return nil, err
}
return &LevelQueue{
indexer: indexer,
queue: queue,
batchNumber: batchNumber,
}, nil
}
// Run starts to run the queue
func (l *LevelQueue) Run() error {
var i int
var datas = make([]*IndexerData, 0, l.batchNumber)
for {
i++
if len(datas) > l.batchNumber || (len(datas) > 0 && i > 3) {
l.indexer.Index(datas)
datas = make([]*IndexerData, 0, l.batchNumber)
i = 0
continue
}
bs, err := l.queue.RPop()
if err != nil {
if err != levelqueue.ErrNotFound {
log.Error(4, "RPop: %v", err)
}
time.Sleep(time.Millisecond * 100)
continue
}
if len(bs) <= 0 {
time.Sleep(time.Millisecond * 100)
continue
}
var data IndexerData
err = json.Unmarshal(bs, &data)
if err != nil {
log.Error(4, "Unmarshal: %v", err)
time.Sleep(time.Millisecond * 100)
continue
}
log.Trace("LevelQueue: task found: %#v", data)
if data.IsDelete {
if data.ID > 0 {
if err = l.indexer.Delete(data.ID); err != nil {
log.Error(4, "indexer.Delete: %v", err)
}
} else if len(data.IDs) > 0 {
if err = l.indexer.Delete(data.IDs...); err != nil {
log.Error(4, "indexer.Delete: %v", err)
}
}
time.Sleep(time.Millisecond * 10)
continue
}
datas = append(datas, &data)
time.Sleep(time.Millisecond * 10)
}
}
// Push will push the indexer data to queue
func (l *LevelQueue) Push(data *IndexerData) error {
bs, err := json.Marshal(data)
if err != nil {
return err
}
return l.queue.LPush(bs)
}
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