🎨 历史数据库索引队列化 https://github.com/siyuan-note/siyuan/issues/7386

kernel/sql/queue_history.go

@@ -0,0 +1,139 @@
+// SiYuan - Build Your Eternal Digital Garden
+// Copyright (c) 2020-present, b3log.org
+//
+// This program 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.
+//
+// This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package sql
+
+import (
+	"database/sql"
+	"errors"
+	"fmt"
+	"runtime/debug"
+	"sync"
+	"time"
+
+	"github.com/siyuan-note/eventbus"
+	"github.com/siyuan-note/logging"
+	"github.com/siyuan-note/siyuan/kernel/task"
+	"github.com/siyuan-note/siyuan/kernel/util"
+)
+
+var (
+	historyOperationQueue []*historyDBQueueOperation
+	historyDBQueueLock    = sync.Mutex{}
+
+	historyTxLock = sync.Mutex{}
+)
+
+type historyDBQueueOperation struct {
+	inQueueTime time.Time
+	action      string // index/deletePathPrefix
+
+	histories  []*History // index
+	pathPrefix string     // deletePathPrefix
+}
+
+func FlushHistoryTxJob() {
+	task.AppendTask(task.HistoryDatabaseIndexCommit, FlushHistoryQueue)
+}
+
+func FlushHistoryQueue() {
+	ops := getHistoryOperations()
+	if 1 > len(ops) {
+		return
+	}
+
+	txLock.Lock()
+	defer txLock.Unlock()
+	start := time.Now()
+
+	context := map[string]interface{}{eventbus.CtxPushMsg: eventbus.CtxPushMsgToStatusBar}
+	total := len(ops)
+	for i, op := range ops {
+		if util.IsExiting {
+			return
+		}
+
+		tx, err := beginHistoryTx()
+		if nil != err {
+			return
+		}
+
+		context["current"] = i
+		context["total"] = total
+		if err = execHistoryOp(op, tx, context); nil != err {
+			tx.Rollback()
+			logging.LogErrorf("queue operation failed: %s", err)
+			continue
+		}
+
+		if err = commitHistoryTx(tx); nil != err {
+			logging.LogErrorf("commit tx failed: %s", err)
+			return
+		}
+
+		if 16 < i && 0 == i%128 {
+			debug.FreeOSMemory()
+		}
+	}
+
+	if 128 < len(ops) {
+		debug.FreeOSMemory()
+	}
+
+	elapsed := time.Now().Sub(start).Milliseconds()
+	if 7000 < elapsed {
+		logging.LogInfof("database history op tx [%dms]", elapsed)
+	}
+}
+
+func execHistoryOp(op *historyDBQueueOperation, tx *sql.Tx, context map[string]interface{}) (err error) {
+	switch op.action {
+	case "index":
+		err = insertHistories(tx, op.histories, context)
+	case "deletePathPrefix":
+		err = deleteHistoriesByPathPrefix(tx, op.pathPrefix, context)
+	default:
+		msg := fmt.Sprintf("unknown history operation [%s]", op.action)
+		logging.LogErrorf(msg)
+		err = errors.New(msg)
+	}
+	return
+}
+
+func DeleteHistoriesByPathPrefixQueue(pathPrefix string) {
+	historyDBQueueLock.Lock()
+	defer historyDBQueueLock.Unlock()
+
+	newOp := &historyDBQueueOperation{inQueueTime: time.Now(), action: "deletePathPrefix", pathPrefix: pathPrefix}
+	historyOperationQueue = append(historyOperationQueue, newOp)
+}
+
+func IndexHistoriesQueue(histories []*History) {
+	historyDBQueueLock.Lock()
+	defer historyDBQueueLock.Unlock()
+
+	newOp := &historyDBQueueOperation{inQueueTime: time.Now(), action: "index", histories: histories}
+	historyOperationQueue = append(historyOperationQueue, newOp)
+}
+
+func getHistoryOperations() (ops []*historyDBQueueOperation) {
+	historyDBQueueLock.Lock()
+	defer historyDBQueueLock.Unlock()
+
+	ops = historyOperationQueue
+	historyOperationQueue = nil
+	return
+}