88 lines
2.4 KiB
Go
88 lines
2.4 KiB
Go
package indexer
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import (
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"context"
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"oc-discovery/conf"
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"oc-discovery/daemons/node/common"
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"sync"
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oclib "cloud.o-forge.io/core/oc-lib"
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dht "github.com/libp2p/go-libp2p-kad-dht"
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pubsub "github.com/libp2p/go-libp2p-pubsub"
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record "github.com/libp2p/go-libp2p-record"
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"github.com/libp2p/go-libp2p/core/host"
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)
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// IndexerService manages the indexer node's state: stream records, DHT, pubsub.
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type IndexerService struct {
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*common.LongLivedStreamRecordedService[PeerRecord]
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PS *pubsub.PubSub
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DHT *dht.IpfsDHT
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isStrictIndexer bool
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mu sync.RWMutex
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IsNative bool
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Native *NativeState // non-nil when IsNative == true
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}
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// NewIndexerService creates an IndexerService.
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// If ps is nil, this is a strict indexer (no pre-existing gossip sub from a node).
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func NewIndexerService(h host.Host, ps *pubsub.PubSub, maxNode int, isNative bool) *IndexerService {
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logger := oclib.GetLogger()
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logger.Info().Msg("open indexer mode...")
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var err error
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ix := &IndexerService{
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LongLivedStreamRecordedService: common.NewStreamRecordedService[PeerRecord](h, maxNode),
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isStrictIndexer: ps == nil,
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IsNative: isNative,
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}
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if ps == nil {
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ps, err = pubsub.NewGossipSub(context.Background(), ix.Host)
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if err != nil {
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panic(err) // can't run your indexer without a propagation pubsub
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}
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}
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ix.PS = ps
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if ix.isStrictIndexer {
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logger.Info().Msg("connect to indexers as strict indexer...")
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common.ConnectToIndexers(h, 0, 5, ix.Host.ID())
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logger.Info().Msg("subscribe to decentralized search flow as strict indexer...")
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ix.SubscribeToSearch(ix.PS, nil)
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}
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if ix.DHT, err = dht.New(
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context.Background(),
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ix.Host,
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dht.Mode(dht.ModeServer),
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dht.Validator(record.NamespacedValidator{
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"node": PeerRecordValidator{},
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"indexer": IndexerRecordValidator{}, // for native indexer registry
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}),
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); err != nil {
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return nil
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}
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// InitNative must happen after DHT is ready
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if isNative {
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ix.InitNative()
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} else {
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ix.initNodeHandler()
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}
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// Register with configured natives so this indexer appears in their cache
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if nativeAddrs := conf.GetConfig().NativeIndexerAddresses; nativeAddrs != "" {
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StartNativeRegistration(ix.Host, nativeAddrs)
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}
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return ix
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}
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func (ix *IndexerService) Close() {
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ix.DHT.Close()
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ix.PS.UnregisterTopicValidator(common.TopicPubSubSearch)
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for _, s := range ix.StreamRecords {
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for _, ss := range s {
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ss.HeartbeatStream.Stream.Close()
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}
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}
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}
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