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process_block.go
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process_block.go
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package pipeline
import (
"context"
"errors"
"fmt"
"io"
"runtime/debug"
"github.com/streamingfast/substreams/storage/execout"
"github.com/streamingfast/substreams/reqctx"
"go.opentelemetry.io/otel/attribute"
"github.com/streamingfast/bstream"
"github.com/streamingfast/substreams/metrics"
pbsubstreams "github.com/streamingfast/substreams/pb/sf/substreams/v1"
"go.uber.org/zap"
"google.golang.org/protobuf/types/known/timestamppb"
)
func (p *Pipeline) ProcessBlock(block *bstream.Block, obj interface{}) (err error) {
ctx, span := reqctx.WithSpan(p.ctx, "process_block")
defer span.EndWithErr(&err)
reqStats := reqctx.ReqStats(ctx)
logger := reqctx.Logger(ctx)
defer func() {
if r := recover(); r != nil {
if err, ok := r.(error); ok {
if errors.Is(err, context.Canceled) {
logger.Info("context canceled")
return
}
}
err = fmt.Errorf("panic at block %s: %s", block, r)
logger.Error("panic while process block", zap.Uint64("block_num", block.Num()), zap.Error(err))
logger.Error(string(debug.Stack()))
}
}()
metrics.BlockBeginProcess.Inc()
defer metrics.BlockEndProcess.Inc()
clock := &pbsubstreams.Clock{
Number: block.Num(),
Id: block.Id,
Timestamp: timestamppb.New(block.Time()),
}
cursor := obj.(bstream.Cursorable).Cursor()
step := obj.(bstream.Stepable).Step()
span.SetAttributes(
attribute.String("block.id", block.Id),
attribute.Int64("block.num", int64(block.Number)),
attribute.Stringer("block.step", step),
)
reqStats.RecordBlock(block.AsRef())
p.gate.processBlock(block.Number, step)
if err = p.processBlock(ctx, block, clock, cursor, step); err != nil {
p.runPostJobHooks(ctx, clock)
return err // watch out, io.EOF needs to go through undecorated
}
return
}
func (p *Pipeline) processBlock(ctx context.Context, block *bstream.Block, clock *pbsubstreams.Clock, cursor *bstream.Cursor, step bstream.StepType) (err error) {
var eof bool
switch step {
case bstream.StepUndo:
if err = p.handleStepUndo(ctx, clock, cursor); err != nil {
return fmt.Errorf("step undo: %w", err)
}
case bstream.StepStalled:
if err := p.handleStepStalled(clock); err != nil {
return fmt.Errorf("step stalled: %w", err)
}
case bstream.StepNew:
err := p.handlerStepNew(ctx, block, clock, cursor)
if err != nil && err != io.EOF {
return fmt.Errorf("step new: handler step new: %w", err)
}
if err == io.EOF {
eof = true
}
case bstream.StepNewIrreversible:
err := p.handlerStepNew(ctx, block, clock, cursor)
if err != nil && err != io.EOF {
return fmt.Errorf("step new irr: handler step new: %w", err)
}
if err == io.EOF {
eof = true
}
err = p.handleStepFinal(clock)
if err != nil {
return fmt.Errorf("handling step irreversible: %w", err)
}
case bstream.StepIrreversible:
err = p.handleStepFinal(clock)
if err != nil {
return fmt.Errorf("handling step irreversible: %w", err)
}
}
if eof {
return io.EOF
}
return nil
}
func (p *Pipeline) handleStepStalled(clock *pbsubstreams.Clock) error {
p.execOutputCache.HandleStalled(clock)
p.forkHandler.removeReversibleOutput(clock.Number)
return nil
}
func (p *Pipeline) handleStepUndo(ctx context.Context, clock *pbsubstreams.Clock, cursor *bstream.Cursor) error {
if p.gate.shouldSendSnapshot() {
if err := p.sendSnapshots(ctx, p.stores.StoreMap); err != nil {
return fmt.Errorf("send initial snapshots: %w", err)
}
}
p.execOutputCache.HandleUndo(clock)
if err := p.forkHandler.handleUndo(clock, cursor, p.respFunc, p.gate.shouldSendOutputs()); err != nil {
return fmt.Errorf("reverting outputs: %w", err)
}
return nil
}
func (p *Pipeline) handleStepFinal(clock *pbsubstreams.Clock) error {
p.lastFinalClock = clock
if err := p.execOutputCache.HandleFinal(clock); err != nil {
return fmt.Errorf("exec output cache: handle final: %w", err)
}
p.forkHandler.removeReversibleOutput(clock.Number)
return nil
}
func (p *Pipeline) handlerStepNew(ctx context.Context, block *bstream.Block, clock *pbsubstreams.Clock, cursor *bstream.Cursor) error {
reqDetails := reqctx.Details(ctx)
if isBlockOverStopBlock(clock.Number, reqDetails.Request.StopBlockNum) {
return io.EOF
}
if err := p.stores.flushStores(ctx, block.Number); err != nil {
return fmt.Errorf("step new irr: stores end of stream: %w", err)
}
if p.gate.shouldSendSnapshot() {
if err := p.sendSnapshots(ctx, p.stores.StoreMap); err != nil {
return fmt.Errorf("send initial snapshots: %w", err)
}
}
logger := reqctx.Logger(ctx)
execOutput, err := p.execOutputCache.NewBuffer(block, clock, cursor)
if err != nil {
return fmt.Errorf("setting up exec output: %w", err)
}
if err := p.runPreBlockHooks(ctx, clock); err != nil {
return fmt.Errorf("pre block hook: %w", err)
}
if err := p.executeModules(ctx, execOutput); err != nil {
return fmt.Errorf("execute modules: %w", err)
}
if reqDetails.ShouldReturnProgressMessages() {
if err = p.returnModuleProgressOutputs(clock); err != nil {
return fmt.Errorf("failed to return modules progress %w", err)
}
}
if p.gate.shouldSendOutputs() {
logger.Debug("will return module outputs")
if err = returnModuleDataOutputs(clock, bstream.StepNew, cursor, p.moduleOutputs, p.respFunc); err != nil {
return fmt.Errorf("failed to return module data output: %w", err)
}
}
p.stores.resetStores()
logger.Debug("block processed", zap.Uint64("block_num", block.Number))
return nil
}
func (p *Pipeline) executeModules(ctx context.Context, execOutput execout.ExecutionOutput) (err error) {
ctx, span := reqctx.WithSpan(ctx, "modules_executions")
defer span.EndWithErr(&err)
// TODO(abourget): get the module executors lazily from the OutputModulesGraph
// this way we skip the buildWASM() in `Init()`.
// Would pave the way towards PATCH'd modules too.
p.moduleOutputs = nil
for _, executor := range p.moduleExecutors {
if err := p.execute(ctx, executor, execOutput); err != nil {
return fmt.Errorf("running executor %q: %w", executor.Name(), err)
}
}
return nil
}