224 lines
7.4 KiB
Go
224 lines
7.4 KiB
Go
// VulcanizeDB
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// Copyright © 2022 Vulcanize
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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// This file contains all the code to process historic slots.
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package beaconclient
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import (
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"context"
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"fmt"
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"strconv"
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"time"
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"github.com/jackc/pgx/v4"
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log "github.com/sirupsen/logrus"
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"github.com/vulcanize/ipld-ethcl-indexer/pkg/database/sql"
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"github.com/vulcanize/ipld-ethcl-indexer/pkg/loghelper"
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)
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var (
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// Get a single highest priority and non-checked out row row from ethcl.historical_process
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getHpEntryStmt string = `SELECT start_slot, end_slot FROM ethcl.historic_process
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WHERE checked_out=false
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ORDER BY priority ASC
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LIMIT 1;`
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// Used to periodically check to see if there is a new entry in the ethcl.historic_process table.
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checkHpEntryStmt string = `SELECT * FROM ethcl.historic_process WHERE checked_out=false;`
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// Used to checkout a row from the ethcl.historic_process table
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lockHpEntryStmt string = `UPDATE ethcl.historic_process
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SET checked_out=true
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WHERE start_slot=$1 AND end_slot=$2;`
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// Used to delete an entry from the knownGaps table
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deleteHpEntryStmt string = `DELETE FROM ethcl.historic_process
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WHERE start_slot=$1 AND end_slot=$2;`
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)
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type historicProcessing struct {
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db sql.Database
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metrics *BeaconClientMetrics
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}
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// Get a single row of historical slots from the table.
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func (hp historicProcessing) getSlotRange(slotCh chan<- slotsToProcess) []error {
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return getBatchProcessRow(hp.db, getHpEntryStmt, checkHpEntryStmt, lockHpEntryStmt, slotCh)
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}
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// Remove the table entry.
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func (hp historicProcessing) removeTableEntry(processCh <-chan slotsToProcess) error {
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return removeRowPostProcess(hp.db, processCh, QueryBySlotStmt, deleteHpEntryStmt)
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}
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// Remove the table entry.
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func (hp historicProcessing) handleProcessingErrors(errMessages <-chan batchHistoricError) {
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for {
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errMs := <-errMessages
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loghelper.LogSlotError(strconv.Itoa(errMs.slot), errMs.err)
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writeKnownGaps(hp.db, 1, errMs.slot, errMs.slot, errMs.err, errMs.errProcess, hp.metrics)
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}
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}
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// Process the slot range.
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func processSlotRangeWorker(workCh <-chan int, errCh chan<- batchHistoricError, db sql.Database, serverAddress string, metrics *BeaconClientMetrics) {
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for slot := range workCh {
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log.Debug("Handling slot: ", slot)
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err, errProcess := handleHistoricSlot(db, serverAddress, slot, metrics)
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errMs := batchHistoricError{
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err: err,
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errProcess: errProcess,
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slot: slot,
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}
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if err != nil {
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errCh <- errMs
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}
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}
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}
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// A wrapper function that insert the start_slot and end_slot from a single row into a channel.
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// It also locks the row by updating the checked_out column.
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// The statement for getting the start_slot and end_slot must be provided.
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// The statement for "locking" the row must also be provided.
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func getBatchProcessRow(db sql.Database, getStartEndSlotStmt string, checkNewRowsStmt string, checkOutRowStmt string, slotCh chan<- slotsToProcess) []error {
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errCount := make([]error, 0)
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// 5 is an arbitrary number. It allows us to retry a few times before
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// ending the application.
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prevErrCount := 0
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for len(errCount) < 5 {
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if len(errCount) != prevErrCount {
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log.WithFields(log.Fields{
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"errCount": errCount,
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}).Error("New error entry added")
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}
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processRow, err := db.Exec(context.Background(), checkNewRowsStmt)
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if err != nil {
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errCount = append(errCount, err)
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}
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row, err := processRow.RowsAffected()
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if err != nil {
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errCount = append(errCount, err)
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}
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if row < 1 {
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time.Sleep(1000 * time.Millisecond)
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log.Debug("We are checking rows, be patient")
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continue
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}
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log.Debug("We found a new row")
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ctx := context.Background()
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// Setup TX
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tx, err := db.Begin(ctx)
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if err != nil {
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loghelper.LogError(err).Error("We are unable to Begin a SQL transaction")
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errCount = append(errCount, err)
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continue
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}
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defer func() {
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err := tx.Rollback(ctx)
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if err != nil {
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loghelper.LogError(err).Error("We were unable to Rollback a transaction")
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errCount = append(errCount, err)
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}
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}()
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// Query the DB for slots.
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sp := slotsToProcess{}
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err = tx.QueryRow(ctx, getStartEndSlotStmt).Scan(&sp.startSlot, &sp.endSlot)
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if err != nil {
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if err == pgx.ErrNoRows {
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time.Sleep(100 * time.Millisecond)
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continue
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}
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loghelper.LogSlotRangeStatementError(strconv.Itoa(sp.startSlot), strconv.Itoa(sp.endSlot), getStartEndSlotStmt, err).Error("Unable to get a row")
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errCount = append(errCount, err)
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continue
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}
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// Checkout the Row
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res, err := tx.Exec(ctx, checkOutRowStmt, sp.startSlot, sp.endSlot)
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if err != nil {
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loghelper.LogSlotRangeStatementError(strconv.Itoa(sp.startSlot), strconv.Itoa(sp.endSlot), checkOutRowStmt, err).Error("Unable to checkout the row")
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errCount = append(errCount, err)
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continue
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}
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rows, err := res.RowsAffected()
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if err != nil {
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loghelper.LogSlotRangeStatementError(strconv.Itoa(sp.startSlot), strconv.Itoa(sp.endSlot), checkOutRowStmt, fmt.Errorf("Unable to determine the rows affected when trying to checkout a row."))
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errCount = append(errCount, err)
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continue
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}
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if rows > 1 {
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loghelper.LogSlotRangeStatementError(strconv.Itoa(sp.startSlot), strconv.Itoa(sp.endSlot), checkOutRowStmt, err).WithFields(log.Fields{
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"rowsReturn": rows,
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}).Error("We locked too many rows.....")
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errCount = append(errCount, err)
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continue
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}
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if rows == 0 {
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loghelper.LogSlotRangeStatementError(strconv.Itoa(sp.startSlot), strconv.Itoa(sp.endSlot), checkOutRowStmt, err).WithFields(log.Fields{
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"rowsReturn": rows,
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}).Error("We did not lock a single row.")
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errCount = append(errCount, err)
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continue
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}
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err = tx.Commit(ctx)
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if err != nil {
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loghelper.LogSlotRangeError(strconv.Itoa(sp.startSlot), strconv.Itoa(sp.endSlot), err).Error("Unable commit transactions.")
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errCount = append(errCount, err)
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continue
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}
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slotCh <- sp
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}
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log.WithFields(log.Fields{
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"ErrCount": errCount,
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}).Error("The ErrCounter")
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return errCount
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}
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// After a row has been processed it should be removed from its appropriate table.
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func removeRowPostProcess(db sql.Database, processCh <-chan slotsToProcess, checkProcessedStmt, removeStmt string) error {
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errCh := make(chan error)
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for {
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slots := <-processCh
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// Make sure the start and end slot exist in the slots table.
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go func() {
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finishedProcess := false
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for !finishedProcess {
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isStartProcess, err := isSlotProcessed(db, checkProcessedStmt, strconv.Itoa(slots.startSlot))
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if err != nil {
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errCh <- err
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}
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isEndProcess, err := isSlotProcessed(db, checkProcessedStmt, strconv.Itoa(slots.endSlot))
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if err != nil {
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errCh <- err
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}
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if isStartProcess && isEndProcess {
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finishedProcess = true
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}
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}
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_, err := db.Exec(context.Background(), removeStmt, strconv.Itoa(slots.startSlot), strconv.Itoa(slots.endSlot))
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if err != nil {
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errCh <- err
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}
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}()
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if len(errCh) != 0 {
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return <-errCh
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}
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}
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}
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