Add more tests and docs for issue indexer, add db indexer type for searching from database

custom/conf/app.ini.sample

@@ -253,9 +253,19 @@ DB_RETRIES = 10
 ; Backoff time per DB retry (time.Duration)
 DB_RETRY_BACKOFF = 3s
 
-
 [indexer]
+; Issue indexer type, currently support: bleve or db, default is bleve
+ISSUE_INDEXER_TYPE = bleve
+; Issue indexer storage path, available when ISSUE_INDEXER_TYPE is bleve
 ISSUE_INDEXER_PATH = indexers/issues.bleve
+; Issue indexer queue, currently support: channel or levelqueue, default is levelqueue
+ISSUE_INDEXER_QUEUE_TYPE = levelqueue
+; When ISSUE_INDEXER_QUEUE_TYPE is levelqueue, this will be the queue will be saved path, 
+; default is indexers/issues.queue
+ISSUE_INDEXER_QUEUE_DIR = indexers/issues.queue
+; Batch queue number, default is 20
+ISSUE_INDEXER_QUEUE_BATCH_NUMBER = 20
+
 ; repo indexer by default disabled, since it uses a lot of disk space
 REPO_INDEXER_ENABLED = false
 REPO_INDEXER_PATH = indexers/repos.bleve

docs/content/doc/advanced/config-cheat-sheet.en-us.md

@@ -154,7 +154,12 @@ Values containing `#` or `;` must be quoted using `` ` `` or `"""`.
 
 ## Indexer (`indexer`)
 
+- `ISSUE_INDEXER_TYPE`: **bleve**: Issue indexer type, currently support: bleve or db, if it's db, below issue indexer item will be invalid.
 - `ISSUE_INDEXER_PATH`: **indexers/issues.bleve**: Index file used for issue search.
+- `ISSUE_INDEXER_QUEUE_TYPE`: **levelqueue**: Issue indexer queue, currently support: channel or levelqueue
+- `ISSUE_INDEXER_QUEUE_DIR`: **indexers/issues.queue**: When ISSUE_INDEXER_QUEUE_TYPE is levelqueue, this will be the queue will be saved path
+- `ISSUE_INDEXER_QUEUE_BATCH_NUMBER`: **20**: Batch queue number
+
 - `REPO_INDEXER_ENABLED`: **false**: Enables code search (uses a lot of disk space).
 - `REPO_INDEXER_PATH`: **indexers/repos.bleve**: Index file used for code search.
 - `UPDATE_BUFFER_LEN`: **20**: Buffer length of index request.

docs/content/doc/advanced/config-cheat-sheet.zh-cn.md

@@ -82,6 +82,20 @@ menu:
 - `PATH`: Tidb 或者 SQLite3 数据文件存放路径。
 - `LOG_SQL`: **true**: 显示生成的SQL，默认为真。
 
+
+## Indexer (`indexer`)
+
+- `ISSUE_INDEXER_TYPE`: **bleve**: 工单索引类型，当前支持 `bleve` 或 `db`，当为 `db` 时其它工单索引项可不用设置。
+- `ISSUE_INDEXER_PATH`: **indexers/issues.bleve**: 工单索引文件存放路径，当索引类型为 `bleve` 时有效。
+- `ISSUE_INDEXER_QUEUE_TYPE`: **levelqueue**: 工单索引队列类型，当前支持 `channel` 或 `levelqueue`。
+- `ISSUE_INDEXER_QUEUE_DIR`: **indexers/issues.queue**: 当 `ISSUE_INDEXER_QUEUE_TYPE` 为 `levelqueue` 时，保存索引队列的磁盘路径。
+- `ISSUE_INDEXER_QUEUE_BATCH_NUMBER`: **20**: 队列处理中批量提交数量。
+
+- `REPO_INDEXER_ENABLED`: **false**: 是否启用代码搜索（启用后会占用比较大的磁盘空间）。
+- `REPO_INDEXER_PATH`: **indexers/repos.bleve**: 用于代码搜索的索引文件路径。
+- `UPDATE_BUFFER_LEN`: **20**: 代码索引请求的缓冲区长度。
+- `MAX_FILE_SIZE`: **1048576**: 进行解析的源代码文件的最大长度，小于该值时才会索引。
+
 ## Security (`security`)
 
 - `INSTALL_LOCK`: 是否允许运行安装向导，(跟管理员账号有关，十分重要)。

models/issue.go

@@ -1684,6 +1684,40 @@ func GetRepoIssueStats(repoID, uid int64, filterMode int, isPull bool) (numOpen
 	return openResult, closedResult
 }
 
+// SearchIssueIDsByKeyword search issues on database
+func SearchIssueIDsByKeyword(kw string, repoID int64, limit, start int) (int64, []int64, error) {
+	var repoCond = builder.Eq{"repo_id": repoID}
+	var subQuery = builder.Select("id").From("issue").Where(repoCond)
+	var cond = builder.And(
+		repoCond,
+		builder.Or(
+			builder.Like{"name", kw},
+			builder.Like{"content", kw},
+			builder.In("id", builder.Select("issue_id").
+				From("comment").
+				Where(builder.And(
+					builder.Eq{"type": CommentTypeComment},
+					builder.In("issue_id", subQuery),
+					builder.Like{"content", kw},
+				)),
+			),
+		),
+	)
+
+	var ids = make([]int64, 0, limit)
+	err := x.Distinct("id").Table("issue").Where(cond).Limit(limit, start).Find(&ids)
+	if err != nil {
+		return 0, nil, err
+	}
+
+	total, err := x.Distinct("id").Table("issue").Where(cond).Count()
+	if err != nil {
+		return 0, nil, err
+	}
+
+	return total, ids, nil
+}
+
 func updateIssue(e Engine, issue *Issue) error {
 	_, err := e.ID(issue.ID).AllCols().Update(issue)
 	if err != nil {

models/issue_test.go

@@ -295,3 +295,28 @@ func TestIssue_loadTotalTimes(t *testing.T) {
 	assert.NoError(t, ms.loadTotalTimes(x))
 	assert.Equal(t, int64(3662), ms.TotalTrackedTime)
 }
+
+func TestIssue_SearchIssueIDsByKeyword(t *testing.T) {
+	assert.NoError(t, PrepareTestDatabase())
+
+	total, ids, err := SearchIssueIDsByKeyword("issue2", 1, 10, 0)
+	assert.NoError(t, err)
+	assert.EqualValues(t, 1, total)
+	assert.EqualValues(t, []int64{2}, ids)
+
+	total, ids, err = SearchIssueIDsByKeyword("first", 1, 10, 0)
+	assert.NoError(t, err)
+	assert.EqualValues(t, 1, total)
+	assert.EqualValues(t, []int64{1}, ids)
+
+	total, ids, err = SearchIssueIDsByKeyword("for", 1, 10, 0)
+	assert.NoError(t, err)
+	assert.EqualValues(t, 4, total)
+	assert.EqualValues(t, []int64{1, 2, 3, 5}, ids)
+
+	// issue1's comment id 2
+	total, ids, err = SearchIssueIDsByKeyword("good", 1, 10, 0)
+	assert.NoError(t, err)
+	assert.EqualValues(t, 1, total)
+	assert.EqualValues(t, []int64{1}, ids)
+}

modules/indexer/issues/db.go

@@ -0,0 +1,45 @@
+// 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 "code.gitea.io/gitea/models"
+
+// DBIndexer implements Indexer inteface to use database's like search
+type DBIndexer struct {
+}
+
+// Init dummy function
+func (db *DBIndexer) Init() (bool, error) {
+	return false, nil
+}
+
+// Index dummy function
+func (db *DBIndexer) Index(issue []*IndexerData) error {
+	return nil
+}
+
+// Delete dummy function
+func (db *DBIndexer) Delete(ids ...int64) error {
+	return nil
+}
+
+// Search dummy function
+func (db *DBIndexer) Search(kw string, repoID int64, limit, start int) (*SearchResult, error) {
+	total, ids, err := models.SearchIssueIDsByKeyword(kw, repoID, limit, start)
+	if err != nil {
+		return nil, err
+	}
+	var result = SearchResult{
+		Total: total,
+		Hits:  make([]Match, 0, limit),
+	}
+	for _, id := range ids {
+		result.Hits = append(result.Hits, Match{
+			ID:     id,
+			RepoID: repoID,
+		})
+	}
+	return &result, nil
+}

modules/indexer/issues/indexer.go

@@ -33,7 +33,8 @@ type Match struct {
 
 // SearchResult represents search results
 type SearchResult struct {
-	Hits []Match
+	Total int64
+	Hits  []Match
 }
 
 // Indexer defines an inteface to indexer issues contents
@@ -54,6 +55,7 @@ var (
 // all issue index done.
 func InitIssueIndexer(syncReindex bool) error {
 	var populate bool
+	var dummyQueue bool
 	switch setting.Indexer.IssueType {
 	case "bleve":
 		issueIndexer = NewBleveIndexer(setting.Indexer.IssuePath)
@@ -62,10 +64,17 @@ func InitIssueIndexer(syncReindex bool) error {
 			return err
 		}
 		populate = !exist
+	case "db":
+		issueIndexer = &DBIndexer{}
+		dummyQueue = true
 	default:
 		return fmt.Errorf("unknow issue indexer type: %s", setting.Indexer.IssueType)
 	}
 
+	if dummyQueue {
+		return nil
+	}
+
 	var err error
 	switch setting.Indexer.IssueIndexerQueueType {
 	case setting.LevelQueueType:

modules/indexer/issues/indexer_test.go

@@ -48,4 +48,8 @@ func TestSearchIssues(t *testing.T) {
 	ids, err = SearchIssuesByKeyword(1, "for")
 	assert.NoError(t, err)
 	assert.EqualValues(t, []int64{1, 2, 3, 5}, ids)
+
+	ids, err = SearchIssuesByKeyword(1, "good")
+	assert.NoError(t, err)
+	assert.EqualValues(t, []int64{1}, ids)
 }

modules/indexer/issues/queue.go

@@ -7,5 +7,19 @@ package issues
 // Queue defines an interface to save an issue indexer queue
 type Queue interface {
 	Run() error
-	Push(*IndexerData)
+	Push(*IndexerData) error
+}
+
+// DummyQueue represents an empty queue
+type DummyQueue struct {
+}
+
+// Run starts to run the queue
+func (b *DummyQueue) Run() error {
+	return nil
+}
+
+// Push pushes data to indexer
+func (b *DummyQueue) Push(*IndexerData) error {
+	return nil
 }

modules/indexer/issues/queue_channel.go

@@ -33,6 +33,11 @@ func (c *ChannelQueue) Run() error {
 	for {
 		select {
 		case data := <-c.queue:
+			if data.IsDelete {
+				c.indexer.Delete(data.IDs...)
+				continue
+			}
+
 			datas = append(datas, data)
 			if len(datas) >= c.batchNumber {
 				c.indexer.Index(datas)
@@ -51,6 +56,7 @@ func (c *ChannelQueue) Run() error {
 }
 
 // Push will push the indexer data to queue
-func (c *ChannelQueue) Push(data *IndexerData) {
+func (c *ChannelQueue) Push(data *IndexerData) error {
 	c.queue <- data
+	return nil
 }

modules/indexer/issues/queue_disk.go

@@ -94,14 +94,10 @@ func (l *LevelQueue) Run() error {
 }
 
 // Push will push the indexer data to queue
-func (l *LevelQueue) Push(data *IndexerData) {
+func (l *LevelQueue) Push(data *IndexerData) error {
 	bs, err := json.Marshal(data)
 	if err != nil {
-		log.Error(4, "Marshal: %v", err)
-		return
-	}
-	err = l.queue.LPush(bs)
-	if err != nil {
-		log.Error(4, "LPush: %v", err)
+		return err
 	}
+	return l.queue.LPush(bs)
 }

modules/setting/indexer.go

@@ -38,6 +38,7 @@ var (
 
 func newIndexerService() {
 	sec := Cfg.Section("indexer")
+	Indexer.IssueType = sec.Key("ISSUE_INDEXER_TYPE").MustString("bleve")
 	Indexer.IssuePath = sec.Key("ISSUE_INDEXER_PATH").MustString(path.Join(AppDataPath, "indexers/issues.bleve"))
 	if !filepath.IsAbs(Indexer.IssuePath) {
 		Indexer.IssuePath = path.Join(AppWorkPath, Indexer.IssuePath)