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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| package db | ||
|
|
||
| import ( | ||
| "context" | ||
| "database/sql" | ||
| "fmt" | ||
|
|
||
| "github.com/dennis-tra/nebula-crawler/db/models" | ||
| log "github.com/sirupsen/logrus" | ||
| "github.com/uptrace/opentelemetry-go-extra/otelsql" | ||
| "github.com/volatiletech/sqlboiler/v4/queries/qm" | ||
| semconv "go.opentelemetry.io/otel/semconv/v1.21.0" | ||
|
|
||
| "github.com/dennis-tra/nebula-crawler/config" | ||
| ) | ||
|
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| type DBServerClient struct { | ||
| ctx context.Context | ||
|
|
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| // Reference to the configuration | ||
| cfg *config.Database | ||
|
|
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| // Database handler | ||
| dbh *sql.DB | ||
|
|
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| // reference to all relevant db telemetry | ||
| telemetry *telemetry | ||
| } | ||
|
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| var _ ServerClient = (*DBServerClient)(nil) | ||
|
|
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| // InitDBServerClient establishes a database connection with the provided | ||
| // configuration | ||
| func InitDBServerClient(ctx context.Context, cfg *config.Database) (*DBServerClient, error) { | ||
| log.WithFields(log.Fields{ | ||
| "host": cfg.DatabaseHost, | ||
| "port": cfg.DatabasePort, | ||
| "name": cfg.DatabaseName, | ||
| "user": cfg.DatabaseUser, | ||
| "ssl": cfg.DatabaseSSLMode, | ||
| }).Infoln("Initializing database client") | ||
|
|
||
| dbh, err := otelsql.Open("postgres", cfg.DatabaseSourceName(), | ||
| otelsql.WithAttributes(semconv.DBSystemPostgreSQL), | ||
| otelsql.WithMeterProvider(cfg.MeterProvider), | ||
| otelsql.WithTracerProvider(cfg.TracerProvider), | ||
| ) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("opening database: %w", err) | ||
| } | ||
|
|
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| // Set to match the writer worker | ||
| dbh.SetMaxIdleConns(cfg.MaxIdleConns) // default is 2 which leads to many connection open/closings | ||
|
|
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| otelsql.ReportDBStatsMetrics(dbh, otelsql.WithMeterProvider(cfg.MeterProvider)) | ||
|
|
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| // Ping database to verify connection. | ||
| if err = dbh.Ping(); err != nil { | ||
| return nil, fmt.Errorf("pinging database: %w", err) | ||
| } | ||
|
|
||
| telemetry, err := newTelemetry(cfg.TracerProvider, cfg.MeterProvider) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("new telemetry: %w", err) | ||
| } | ||
|
|
||
| client := &DBServerClient{ctx: ctx, cfg: cfg, dbh: dbh, telemetry: telemetry} | ||
|
|
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| return client, nil | ||
| } | ||
|
|
||
| func (d *DBServerClient) Close() error { | ||
| return d.dbh.Close() | ||
| } | ||
|
|
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| func (d *DBServerClient) GetPeer(ctx context.Context, multiHash string) (*models.Peer, models.ProtocolSlice, error) { | ||
| // write a hand-crafted query to avoid two DB round-trips | ||
|
|
||
| dbPeer, err := models.Peers( | ||
| models.PeerWhere.MultiHash.EQ(multiHash), | ||
| qm.Load(models.PeerRels.AgentVersion), | ||
| qm.Load(models.PeerRels.MultiAddresses), | ||
| qm.Load(models.PeerRels.ProtocolsSet), | ||
| ).One(ctx, d.dbh) | ||
| if err != nil { | ||
| return nil, nil, fmt.Errorf("getting peer: %w", err) | ||
| } | ||
|
|
||
| if dbPeer.R.ProtocolsSet == nil { | ||
| return dbPeer, nil, nil | ||
| } | ||
|
|
||
| protocolIDs := dbPeer.R.ProtocolsSet.ProtocolIds | ||
| ids := make([]int, 0, len(protocolIDs)) | ||
| for _, id := range protocolIDs { | ||
| ids = append(ids, int(id)) | ||
| } | ||
|
|
||
| dbProtocols, err := models.Protocols(models.ProtocolWhere.ID.IN(ids)).All(ctx, d.dbh) | ||
| if err != nil { | ||
| return dbPeer, nil, fmt.Errorf("getting protocols: %w", err) | ||
| } | ||
|
|
||
| return dbPeer, dbProtocols, nil | ||
| } |
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