You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
82 lines
2.2 KiB
82 lines
2.2 KiB
package txindex
|
|
|
|
import (
|
|
"context"
|
|
|
|
"github.com/tendermint/tendermint/libs/service"
|
|
|
|
"github.com/tendermint/tendermint/types"
|
|
)
|
|
|
|
const (
|
|
subscriber = "IndexerService"
|
|
)
|
|
|
|
// IndexerService connects event bus and transaction indexer together in order
|
|
// to index transactions coming from event bus.
|
|
type IndexerService struct {
|
|
service.BaseService
|
|
|
|
idr TxIndexer
|
|
eventBus *types.EventBus
|
|
}
|
|
|
|
// NewIndexerService returns a new service instance.
|
|
func NewIndexerService(idr TxIndexer, eventBus *types.EventBus) *IndexerService {
|
|
is := &IndexerService{idr: idr, eventBus: eventBus}
|
|
is.BaseService = *service.NewBaseService(nil, "IndexerService", is)
|
|
return is
|
|
}
|
|
|
|
// OnStart implements service.Service by subscribing for all transactions
|
|
// and indexing them by events.
|
|
func (is *IndexerService) OnStart() error {
|
|
// Use SubscribeUnbuffered here to ensure both subscriptions does not get
|
|
// canceled due to not pulling messages fast enough. Cause this might
|
|
// sometimes happen when there are no other subscribers.
|
|
|
|
blockHeadersSub, err := is.eventBus.SubscribeUnbuffered(
|
|
context.Background(),
|
|
subscriber,
|
|
types.EventQueryNewBlockHeader)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
txsSub, err := is.eventBus.SubscribeUnbuffered(context.Background(), subscriber, types.EventQueryTx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
go func() {
|
|
for {
|
|
msg := <-blockHeadersSub.Out()
|
|
eventDataHeader := msg.Data().(types.EventDataNewBlockHeader)
|
|
height := eventDataHeader.Header.Height
|
|
batch := NewBatch(eventDataHeader.NumTxs)
|
|
for i := int64(0); i < eventDataHeader.NumTxs; i++ {
|
|
msg2 := <-txsSub.Out()
|
|
txResult := msg2.Data().(types.EventDataTx).TxResult
|
|
if err = batch.Add(&txResult); err != nil {
|
|
is.Logger.Error("Can't add tx to batch",
|
|
"height", height,
|
|
"index", txResult.Index,
|
|
"err", err)
|
|
}
|
|
}
|
|
if err = is.idr.AddBatch(batch); err != nil {
|
|
is.Logger.Error("Failed to index block", "height", height, "err", err)
|
|
} else {
|
|
is.Logger.Debug("Indexed block", "height", height)
|
|
}
|
|
}
|
|
}()
|
|
return nil
|
|
}
|
|
|
|
// OnStop implements service.Service by unsubscribing from all transactions.
|
|
func (is *IndexerService) OnStop() {
|
|
if is.eventBus.IsRunning() {
|
|
_ = is.eventBus.UnsubscribeAll(context.Background(), subscriber)
|
|
}
|
|
}
|