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49 lines
1.2 KiB
49 lines
1.2 KiB
package txindex
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import (
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"context"
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"github.com/tendermint/tendermint/types"
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cmn "github.com/tendermint/tmlibs/common"
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)
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const (
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subscriber = "IndexerService"
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)
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type IndexerService struct {
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cmn.BaseService
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idr TxIndexer
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eventBus *types.EventBus
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}
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func NewIndexerService(idr TxIndexer, eventBus *types.EventBus) *IndexerService {
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is := &IndexerService{idr: idr, eventBus: eventBus}
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is.BaseService = *cmn.NewBaseService(nil, "IndexerService", is)
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return is
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}
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// OnStart implements cmn.Service by subscribing for all transactions
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// and indexing them by tags.
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func (is *IndexerService) OnStart() error {
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ch := make(chan interface{})
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if err := is.eventBus.Subscribe(context.Background(), subscriber, types.EventQueryTx, ch); err != nil {
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return err
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}
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go func() {
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for event := range ch {
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// TODO: may be not perfomant to write one event at a time
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txResult := event.(types.EventDataTx).TxResult
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is.idr.Index(&txResult)
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}
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}()
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return nil
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}
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// OnStop implements cmn.Service by unsubscribing from all transactions.
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func (is *IndexerService) OnStop() {
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if is.eventBus.IsRunning() {
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_ = is.eventBus.UnsubscribeAll(context.Background(), subscriber)
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}
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}
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