Cloudpods/backend/pkg/util/splitable/insert.go

// Copyright 2019 Yunion
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package splitable

import (
	"database/sql"
	"fmt"
	"reflect"
	"time"

	"yunion.io/x/log"
	"yunion.io/x/pkg/errors"
	"yunion.io/x/pkg/util/reflectutils"
	"yunion.io/x/pkg/util/timeutils"
	"yunion.io/x/sqlchemy"
)

func (t *SSplitTableSpec) getLastTableSpecWithLock(lastDate time.Time) (*sqlchemy.STableSpec, error) {
	t.lastTableLock.Lock()
	defer t.lastTableLock.Unlock()
	now := time.Now()
	if t.lastTableSpec != nil && !t.lastTableExpire.IsZero() && t.lastTableExpire.Before(now) {
		return t.lastTableSpec, nil
	}
	lastTableSpec, err := t.getLastTableSpec(lastDate)
	if err != nil {
		return nil, errors.Wrap(err, "getLastTableSpec")
	}
	t.lastTableSpec = lastTableSpec
	t.lastTableExpire = now.Add(time.Hour * lastTableSpecExpireHours)
	return t.lastTableSpec, nil
}

func (t *SSplitTableSpec) getLastTableSpec(lastDate time.Time) (*sqlchemy.STableSpec, error) {
	lastMeta, err := t.getTableLastMeta()
	if err != nil && errors.Cause(err) != sql.ErrNoRows {
		return nil, errors.Wrap(err, "GetTableMeta")
	}

	var lastRecIndex int64
	var lastRecDate time.Time
	var lastTableSpec *sqlchemy.STableSpec

	newMeta := false
	if lastMeta != nil {
		if !lastMeta.StartDate.IsZero() && lastDate.Sub(lastMeta.StartDate) > t.maxDuration {
			lastTable := t.GetTableSpec(*lastMeta)
			ti := lastTable.Instance()
			q := ti.Query(sqlchemy.MAX("last_index", ti.Field(t.indexField)), sqlchemy.MAX("last_date", ti.Field(t.dateField)), sqlchemy.COUNT("total"))
			r := q.Row()
			var lastRecDateStr string
			var total uint64
			err := r.Scan(&lastRecIndex, &lastRecDateStr, &total)
			if err != nil {
				return nil, errors.Wrap(err, "scan lastRecIndex and lastRecDate")
			}
			log.Debugf("lastRecDateStr: %s", lastRecDateStr)
			lastRecDate, _ = timeutils.ParseTimeStr(lastRecDateStr)
			// seal last meta
			_, err = t.metaSpec.Update(lastMeta, func() error {
				lastMeta.End = lastRecIndex
				lastMeta.EndDate = lastRecDate
				lastMeta.Count = total
				return nil
			})
			if err != nil {
				return nil, errors.Wrap(err, "Update last meta")
			}
			newMeta = true
		} else {
			if lastMeta.StartDate.IsZero() {
				indexCol := t.tableSpec.ColumnSpec(t.indexField)
				startDate := lastMeta.CreatedAt
				if startDate.IsZero() {
					startDate = lastDate
				}
				_, err = t.metaSpec.Update(lastMeta, func() error {
					lastMeta.Start = indexCol.AutoIncrementOffset()
					lastMeta.StartDate = startDate
					return nil
				})
				if err != nil {
					return nil, errors.Wrap(err, "Update last meta")
				}
			}
			lastTableSpec = t.GetTableSpec(*lastMeta)
		}
	} else {
		newMeta = true
	}
	if newMeta {
		lastTableSpec, err = t.newTable(lastRecIndex, lastDate)
		if err != nil {
			return nil, errors.Wrap(err, "newTable")
		}
	}
	return lastTableSpec, nil
}

func (t *SSplitTableSpec) Insert(dt interface{}) error {
	var lastDate time.Time
	dataValue := reflect.Indirect(reflect.ValueOf(dt))
	vs := reflectutils.FetchAllStructFieldValueSet(dataValue)
	if lastDateV, ok := vs.GetValue(t.dateField); !ok {
		return errors.Wrap(errors.ErrInvalidStatus, "no dateField found")
	} else {
		lastDate = lastDateV.Interface().(time.Time)
	}
	if lastDate.IsZero() {
		lastDate = time.Now()
		succ := reflectutils.SetStructFieldValue(dataValue, t.dateField, reflect.ValueOf(lastDate))
		if !succ {
			return errors.Wrap(errors.ErrInvalidStatus, "set dateField failed")
		}
	}
	lastTableSpec, err := t.getLastTableSpecWithLock(lastDate)
	if err != nil {
		return errors.Wrap(err, "getLastTableSpec")
	}
	return lastTableSpec.Insert(dt)
}

func (t *SSplitTableSpec) newTable(lastRecIndex int64, lastDate time.Time) (*sqlchemy.STableSpec, error) {
	// insert a new metadata
	meta := STableMetadata{
		Table: fmt.Sprintf("%s_%d", t.tableName, lastDate.Unix()),
	}
	if lastRecIndex > 0 {
		// auto_increment offset should consider HA setup
		meta.Start = lastRecIndex + 10000
		meta.StartDate = lastDate
	}
	err := t.metaSpec.Insert(&meta)
	if err != nil {
		return nil, errors.Wrap(err, "insert new meta")
	}
	// create new table
	newTable := t.GetTableSpec(meta)
	err = newTable.Sync()
	if err != nil {
		return nil, errors.Wrap(err, "sync new table")
	}
	return newTable, nil
}