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job_processor.go
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job_processor.go
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package job_processor
//
// import (
// "fmt"
// "time"
//
// "github.com/juju/errors"
// "github.com/satori/go.uuid"
// gomysql "github.com/siddontang/go-mysql/mysql"
// "github.com/siddontang/go-mysql/replication"
// log "github.com/sirupsen/logrus"
//
// "github.com/moiot/gravity/pkg/core"
//
// "github.com/moiot/gravity/pkg/config"
// "github.com/moiot/gravity/pkg/mysql/job_msg"
// mysqlUtils "github.com/moiot/gravity/pkg/mysql/utils"
// "github.com/moiot/gravity/pkg/utils"
// "github.com/moiot/gravity/schema_store"
// )
//
// type processor interface {
// Process(binlogEvent *replication.BinlogEvent) error
// }
//
// const SequenceNumberBase = int64(0)
//
// var sequenceNumber = SequenceNumberBase
//
// type JobProcessor struct {
// emitter core.Emitter
// msgBuffer []*core.Msg
// canSend bool
// currentPos gomysql.Position
// currentUUIDSet *gomysql.UUIDSet
// currentGTIDSet gomysql.MysqlGTIDSet
// schemaName string
// srcId string
// schemaStore schema_store.SchemaStore
// tableConfigList []config.TableConfig
// }
//
// func getLatestSequenceNumber() int64 {
// sequenceNumber += 1
// return sequenceNumber
// }
//
// func NewJobProcessor(emitter core.Emitter, startPos gomysql.Position, schemaName string, srcId string, schemaStore schema_store.SchemaStore) JobProcessor {
// return JobProcessor{
// emitter: emitter,
// msgBuffer: nil,
// canSend: true,
// currentPos: startPos,
// currentUUIDSet: nil,
// currentGTIDSet: gomysql.MysqlGTIDSet{Sets: make(map[string]*gomysql.UUIDSet)},
// schemaName: schemaName,
// srcId: srcId,
// schemaStore: schemaStore,
// }
// }
//
// func (jobProcessor *JobProcessor) Process(e *replication.BinlogEvent) error {
// switch ev := e.Event.(type) {
// case *replication.RotateEvent:
// jobProcessor.currentPos = gomysql.Position{Name: string(ev.NextLogName), Pos: uint32(ev.Position)}
// log.Infof("[job_processor] rotate binlog to %v", jobProcessor.currentPos)
//
// case *replication.RowsEvent:
// // operations which have impact on rows.
// if string(ev.Table.Schema) == jobProcessor.schemaName {
// tableName := string(ev.Table.Table)
// schema, err := jobProcessor.schemaStore.GetSchema(jobProcessor.schemaName)
// if err != nil {
// return errors.Trace(errors.Annotatef(err, "[job_processor] failed to GetSchema"))
// }
// table := schema[tableName]
// var tableConfig *config.TableConfig = nil
// for i, tc := range jobProcessor.tableConfigList {
// if utils.Glob(tc.Schema, jobProcessor.schemaName) && utils.Glob(tc.Table, tableName) {
// tableConfig = &jobProcessor.tableConfigList[i]
// break
// }
// }
// jobList, err := processRowsEvent(e.Header, ev, jobProcessor.srcId, table, jobProcessor.currentPos, jobProcessor.currentGTIDSet, tableConfig)
// if err != nil {
// return errors.Trace(errors.Annotatef(err, "[job_processor] failed to process RowsEvent: %v", e.Header.EventType))
// }
// jobProcessor.jobBuffer = append(jobProcessor.jobBuffer, jobList...)
// }
//
// case *replication.GTIDEvent:
// // This is the start of a txn.
// jobProcessor.currentPos.Pos = e.Header.LogPos
// u, err := uuid.FromBytes(ev.SID)
// if err != nil {
// return errors.Trace(errors.Annotate(err, "[job_processor] failed to parse GTIDEvent"))
// }
// gtidString := fmt.Sprintf("%s:1-%d", u.String(), ev.GNO)
// jobProcessor.currentUUIDSet, err = gomysql.ParseUUIDSet(gtidString)
// if err != nil {
// return errors.Annotate(err, "[job_processor] failed to ParseUUIDSet")
// }
// jobProcessor.canSend = false
//
// case *replication.XIDEvent:
// // This is the end of a txn.
// jobProcessor.currentPos.Pos = e.Header.LogPos
// jobProcessor.currentGTIDSet.AddSet(jobProcessor.currentUUIDSet)
// jobProcessor.canSend = true
//
// case *replication.QueryEvent:
// jobProcessor.currentPos.Pos = e.Header.LogPos
// // TODO: Do not handle DDL right now
// log.Debugf("[job_processor] skip query event: %v", e)
//
// default:
// log.Debugf("[job_processor] un-supported event type: %v", e)
//
// }
//
// if len(jobProcessor.jobBuffer) > 0 && jobProcessor.canSend {
// jobProcessor.flushJobBuffer()
// }
// return nil
// }
//
// func CreateInsertJobs(header *replication.EventHeader, ev *replication.RowsEvent, srcId string, table *schema_store.Table, pos gomysql.Position, gs gomysql.MysqlGTIDSet, tableConfig *config.TableConfig) ([]Job, error) {
// jobList := make([]Job, len(ev.Rows))
// columns := table.Columns
// pkColumns := job_msg.BuildPkColumns(table, tableConfig)
// pcs := make([]string, len(pkColumns))
// for i, c := range pkColumns {
// pcs[i] = c.Name
// }
// for rowIndex, row := range ev.Rows {
// if len(row) != len(columns) {
// return nil, errors.Trace(errors.Errorf("pos: %s, gs: %s, and data mismatch in length: %d vs %d, table %v, row: %v",
// pos.String(), gs.String(), len(columns), len(row), table, row))
// }
// dmlMsg := &core.DMLMsg{}
// dmlMsg.Operation = core.Insert
// data := make(map[string]interface{})
// for i := 0; i < len(columns); i++ {
// data[columns[i].Name] = schema_store.Deserialize(row[i], columns[i])
// }
// dmlMsg.Data = data
// pks, err := job_msg.GenPrimaryKeys(pkColumns, data)
// if err != nil {
// return nil, errors.Trace(err)
// }
// dmlMsg.Pks = pks
// dmlMsg.PkColumns = pcs
//
// jobMsg := core.Msg{
// Database: table.Schema,
// Table: table.Name,
// Timestamp: time.Unix(int64(header.Timestamp), 0),
// }
// jobMsg.DmlMsg = dmlMsg
//
// jobList[rowIndex] = CreateJob(getLatestSequenceNumber(), srcId, mysqlUtils.Insert, jobMsg, pos, gs)
// }
// return jobList, nil
// }
//
// func CreateUpdateJobs(header *replication.EventHeader, ev *replication.RowsEvent, srcId string, table *schema_store.Table, pos gomysql.Position, gs gomysql.MysqlGTIDSet, tableConfig *config.TableConfig) ([]Job, error) {
// jobList := make([]Job, len(ev.Rows)/2)
// columns := table.Columns
// pkColumns := job_msg.BuildPkColumns(table, tableConfig)
// pcs := make([]string, len(pkColumns))
// for i, c := range pkColumns {
// pcs[i] = c.Name
// }
// for rowIndex := 0; rowIndex < len(ev.Rows); rowIndex += 2 {
// oldData := ev.Rows[rowIndex]
// changedData := ev.Rows[rowIndex+1]
//
// if len(oldData) != len(changedData) {
// return nil, errors.Errorf("pos: %s, gs: %s, update %s.%s data mismatch in length: %d vs %d",
// pos.String(), gs.String(), table.Schema, table.Name, len(oldData), len(changedData))
// }
//
// if len(oldData) != len(columns) {
// return nil, errors.Errorf("pos: %s, gs: %s, update %s.%s columns and data mismatch in length: %d vs %d",
// pos.String(), gs.String(), table.Schema, table.Name, len(columns), len(oldData))
// }
// dmlMsg := &core.DMLMsg{
// Operation: core.Update,
// }
//
// data := make(map[string]interface{})
// old := make(map[string]interface{})
// for i := 0; i < len(oldData); i++ {
// data[columns[i].Name] = schema_store.Deserialize(changedData[i], columns[i])
// old[columns[i].Name] = schema_store.Deserialize(oldData[i], columns[i])
// }
// dmlMsg.Data = data
// dmlMsg.Old = old
// pks, err := job_msg.GenPrimaryKeys(pkColumns, data)
// if err != nil {
// return nil, errors.Trace(err)
// }
// dmlMsg.Pks = pks
// dmlMsg.PkColumns = pcs
// idx := rowIndex / 2
//
// jobMsg := core.Msg{
// Database: table.Schema,
// Table: table.Name,
// Timestamp: time.Unix(int64(header.Timestamp), 0),
// }
// jobMsg.DmlMsg = dmlMsg
// jobList[idx] = CreateJob(getLatestSequenceNumber(), srcId, mysqlUtils.Update, jobMsg, pos, gs)
// }
// return jobList, nil
// }
//
// func CreateDeleteJobs(header *replication.EventHeader, ev *replication.RowsEvent, srcId string, table *schema_store.Table, pos gomysql.Position, gs gomysql.MysqlGTIDSet,
// tableConfig *config.TableConfig) ([]Job, error) {
// jobList := make([]Job, len(ev.Rows))
// columns := table.Columns
// pkColumns := job_msg.BuildPkColumns(table, tableConfig)
// pcs := make([]string, len(pkColumns))
// for i, c := range pkColumns {
// pcs[i] = c.Name
// }
// for rowIndex, row := range ev.Rows {
// if len(row) != len(columns) { // TODO get col name from table map events
// return nil, errors.Errorf("pos: %s, gs: %s, delete %s.%s columns and data mismatch in length: %d vs %d",
// pos.String(), gs.String(), table.Schema, table.Name, len(columns), len(row))
// }
// dmlMsg := &core.DMLMsg{
// Operation: core.Delete,
// }
// data := make(map[string]interface{})
// for i := 0; i < len(columns); i++ {
// data[columns[i].Name] = schema_store.Deserialize(row[i], columns[i])
// }
// dmlMsg.Data = data
// pks, err := job_msg.GenPrimaryKeys(pkColumns, data)
// if err != nil {
// return nil, errors.Trace(err)
// }
// dmlMsg.Pks = pks
// dmlMsg.PkColumns = pcs
//
// jobMsg := core.Msg{
// Database: table.Schema,
// Table: table.Name,
// TableDef: table,
// Timestamp: time.Unix(int64(header.Timestamp), 0),
// Position: gs.String(),
// }
// jobMsg.DmlMsg = dmlMsg
// jobList[rowIndex] = CreateJob(getLatestSequenceNumber(), srcId, mysqlUtils.Del, jobMsg, pos, gs)
// }
//
// return jobList, nil
// }
//
// func processRowsEvent(header *replication.EventHeader, ev *replication.RowsEvent, srcId string, table *schema_store.Table,
// pos gomysql.Position, gs gomysql.MysqlGTIDSet, tableConfig *config.TableConfig) ([]Job, error) {
// eventType := header.EventType
// log.Debugf("[job_processor] process rows event started. event type: %v", eventType)
// var jobList []Job
// var err error
// switch eventType {
// case replication.WRITE_ROWS_EVENTv0, replication.WRITE_ROWS_EVENTv1, replication.WRITE_ROWS_EVENTv2:
// jobList, err = CreateInsertJobs(header, ev, srcId, table, pos, gs, tableConfig)
//
// case replication.UPDATE_ROWS_EVENTv0, replication.UPDATE_ROWS_EVENTv1, replication.UPDATE_ROWS_EVENTv2:
// jobList, err = CreateUpdateJobs(header, ev, srcId, table, pos, gs, tableConfig)
//
// case replication.DELETE_ROWS_EVENTv0, replication.DELETE_ROWS_EVENTv1, replication.DELETE_ROWS_EVENTv2:
// jobList, err = CreateDeleteJobs(header, ev, srcId, table, pos, gs, tableConfig)
//
// default:
// err = errors.NotValidf(fmt.Sprintf("[job_processor] un-expected rows event type: %v", eventType))
// }
// if err != nil {
// return nil, err
// }
// log.Debugf("[job_processor] process rows event finished. event type: %v", eventType)
// return jobList, nil
// }
//
// func (jobProcessor *JobProcessor) flushJobBuffer() {
// for _, job := range jobProcessor.jobBuffer {
// if err := jobProcessor.scheduler.SubmitJob(job); err != nil {
// log.Fatalf("%v", errors.ErrorStack(err))
// }
// }
// jobProcessor.jobBuffer = nil
// }