indexer - top level interface for syncAndPublish

pkg/ipfs/indexer.go

@@ -0,0 +1,93 @@
+// VulcanizeDB
+// Copyright © 2019 Vulcanize
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package ipfs
+
+import (
+	log "github.com/sirupsen/logrus"
+	"sync"
+
+	"github.com/ethereum/go-ethereum/statediff"
+
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
+)
+
+const payloadChanBufferSize = 800 // 1/10th max size
+
+type Indexer interface {
+	Index() error
+}
+
+type IPFSIndexer struct {
+	Syncer    Syncer
+	Converter Converter
+	Publisher Publisher
+	Repository Repository
+	PayloadChan chan statediff.Payload
+	QuitChan    chan bool
+}
+
+func NewIPFSIndexer(ipfsPath string, db *postgres.DB, ethClient core.EthClient, rpcClient core.RpcClient, qc chan bool) (*IPFSIndexer, error) {
+	publisher, err := NewIPLDPublisher(ipfsPath)
+	if err != nil {
+		return nil, err
+	}
+	return &IPFSIndexer{
+		Syncer: NewStateDiffSyncer(rpcClient),
+		Repository: NewCIDRepository(db),
+		Converter: NewPayloadConverter(ethClient),
+		Publisher: publisher,
+		PayloadChan: make(chan statediff.Payload, payloadChanBufferSize),
+		QuitChan: qc,
+	}, nil
+}
+
+// The main processing loop for the syncAndPublish
+func (i *IPFSIndexer) Index(wg sync.WaitGroup) error {
+	sub, err := i.Syncer.Sync(i.PayloadChan)
+	if err != nil {
+		return err
+	}
+	go func() {
+		wg.Add(1)
+		defer wg.Done()
+		for {
+			select {
+			case payload := <-i.PayloadChan:
+				ipldPayload, err := i.Converter.Convert(payload)
+				if err != nil {
+					log.Error(err)
+				}
+				cidPayload, err := i.Publisher.Publish(ipldPayload)
+				if err != nil {
+					log.Error(err)
+				}
+				err = i.Repository.IndexCIDs(cidPayload)
+				if err != nil {
+					log.Error(err)
+				}
+			case err = <-sub.Err():
+				log.Error(err)
+			case <-i.QuitChan:
+				log.Info("quiting IPFSIndexer")
+				return
+			}
+		}
+	}()
+
+	return nil
+}