63 lines
2.2 KiB
Go
63 lines
2.2 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 will call all the functions to start and stop capturing the head of the beacon chain.
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package beaconclient
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import (
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"time"
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log "github.com/sirupsen/logrus"
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"github.com/vulcanize/ipld-ethcl-indexer/pkg/loghelper"
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)
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// This function will perform all the heavy lifting for tracking the head of the chain.
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func (bc *BeaconClient) CaptureHead(knownGapsTableIncrement int) {
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bc.KnownGapTableIncrement = knownGapsTableIncrement
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log.Info("We are tracking the head of the chain.")
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//bc.tempHelper()
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go bc.handleHead()
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//go bc.handleFinalizedCheckpoint()
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go bc.handleReorg()
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bc.captureEventTopic()
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}
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// Stop the head tracking service.
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func (bc *BeaconClient) StopHeadTracking() error {
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log.Info("We are going to stop tracking the head of chain because of the shutdown signal.")
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chHead := make(chan bool)
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chReorg := make(chan bool)
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go bc.HeadTracking.finishProcessingChannel(chHead)
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go bc.ReOrgTracking.finishProcessingChannel(chReorg)
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<-chHead
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<-chReorg
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log.Info("Successfully stopped the head tracking service.")
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return nil
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}
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// This function closes the SSE subscription, but waits until the MessagesCh is empty
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func (se *SseEvents[ProcessedEvents]) finishProcessingChannel(finish chan<- bool) {
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loghelper.LogEndpoint(se.Endpoint).Info("Received a close event.")
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se.SseClient.Unsubscribe(se.MessagesCh)
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for len(se.MessagesCh) != 0 || len(se.ProcessCh) != 0 {
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time.Sleep(time.Duration(shutdownWaitInterval) * time.Millisecond)
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}
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loghelper.LogEndpoint(se.Endpoint).Info("Done processing all messages, ready for shutdown")
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finish <- true
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}
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