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processor.go
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processor.go
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package processor
import (
"context"
"fmt"
"time"
"github.com/jackc/pgx/v4"
"github.com/jackc/pgx/v4/pgxpool"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"golang.org/x/sync/errgroup"
"github.com/barnbridge/meminero/state"
"github.com/barnbridge/meminero/config"
"github.com/barnbridge/meminero/types"
)
type Processor struct {
Raw *types.RawData
Block *types.Block
state *state.Manager
logger *logrus.Entry
storables []types.Storable
}
func New(raw *types.RawData, state *state.Manager) (*Processor, error) {
p := &Processor{
Raw: raw,
state: state,
logger: logrus.WithField("module", "processor"),
}
err := p.preprocess()
if err != nil {
return nil, err
}
p.registerStorables()
return p, nil
}
func (p *Processor) rollbackAll(ctx context.Context, db *pgxpool.Pool) error {
tx, err := db.BeginTx(ctx, pgx.TxOptions{})
if err != nil {
return errors.Wrap(err, "could not start database transaction")
}
_, err = tx.Exec(ctx, "delete from blocks where number = $1", p.Block.Number)
if err != nil {
return errors.Wrap(err, "could not remove block from database")
}
for _, s := range p.storables {
var log = logrus.WithField("module", fmt.Sprintf("storable(%s)", s.ID()))
log.Trace("rolling back block")
start := time.Now()
err = s.Rollback(ctx, tx)
if err != nil {
tx.Rollback(context.Background())
return err
}
recordRollbackDuration(s.ID(), start)
log.WithField("duration", time.Since(start)).Trace("done rolling back block")
}
err = tx.Commit(ctx)
if err != nil {
return errors.Wrap(err, "could not commit rollback transaction")
}
p.logger.WithField("block", p.Block.Number).Info("removed old version from the db; will be replaced with new version")
return nil
}
// Store will open a database transaction and execute all the registered Storables in the said transaction
func (p *Processor) Store(ctx context.Context, db *pgxpool.Pool) (bool, error) {
exists, err := p.checkBlockExists(ctx, db)
if err != nil {
return false, err
}
if exists && !config.Store.Feature.ReplaceBlocks {
p.logger.Infof("block %d (%s) already exists in the database; skipping", p.Block.Number, p.Block.BlockHash)
return false, nil
}
if config.Store.Feature.ReplaceBlocks {
p.logger.WithField("block", p.Block.Number).Warn("removing any old versions of block from db because feature flag is enabled")
err = p.rollbackAll(ctx, db)
if err != nil {
return false, err
}
} else {
reorged, err := p.checkBlockReorged(ctx, db)
if err != nil {
return false, err
}
if reorged {
p.logger.WithField("block", p.Block.Number).Warn("detected reorged block")
err = p.rollbackAll(ctx, db)
if err != nil {
return false, err
}
}
}
start := time.Now()
p.logger.Info("executing storables")
wg, _ := errgroup.WithContext(ctx)
for _, s := range p.storables {
s := s
wg.Go(func() error {
log := logrus.WithField("module", fmt.Sprintf("storable(%s)", s.ID()))
log.Trace("executing")
start := time.Now()
err = s.Execute(ctx)
if err != nil {
return err
}
recordExecuteDuration(s.ID(), start)
log.WithField("duration", time.Since(start)).Trace("done executing")
return nil
})
}
err = wg.Wait()
if err != nil {
return false, errors.Wrap(err, "got error executing storables")
}
p.logger.WithField("duration", time.Since(start)).Info("done executing storables")
err = p.storeAll(ctx, db)
if err != nil {
return false, err
}
return true, nil
}
func (p *Processor) storeAll(ctx context.Context, db *pgxpool.Pool) error {
start := time.Now()
p.logger.Info("storing data to database")
defer func() {
p.logger.WithField("duration", time.Since(start)).Info("done storing data to database")
}()
tx, err := db.BeginTx(ctx, pgx.TxOptions{})
if err != nil {
return errors.Wrap(err, "could not start database transaction")
}
err = p.storeBlock(ctx, tx)
if err != nil {
tx.Rollback(ctx)
return err
}
for _, s := range p.storables {
log := logrus.WithField("module", fmt.Sprintf("storable(%s)", s.ID()))
log.Trace("saving")
start := time.Now()
err = s.SaveToDatabase(ctx, tx)
if err != nil {
tx.Rollback(ctx)
return err
}
recordSaveDuration(s.ID(), start)
log.WithField("duration", time.Since(start)).Trace("done saving")
}
err = tx.Commit(ctx)
if err != nil {
return errors.Wrap(err, "could not save data to db")
}
return nil
}
func (p *Processor) storeBlock(ctx context.Context, tx pgx.Tx) error {
p.logger.Trace("storing block")
start := time.Now()
defer func() { p.logger.WithField("duration", time.Since(start)).Trace("done storing block") }()
b := p.Block
_, err := tx.Exec(ctx, "insert into blocks(number,block_hash,parent_block_hash,block_creation_time) values($1,$2,$3,$4)", b.Number, b.BlockHash, b.ParentBlockHash, b.BlockCreationTime)
if err != nil {
return err
}
return nil
}