revert busevent pointer change

cmd/gotelem/cli/client.go

@@ -52,7 +52,7 @@ var importCmd = &cli.Command{
 		&cli.UintFlag{
 			Name:  "batch-size",
 			Usage: "the maximum size of each SQL transaction",
-			Value: 50,
+			Value: 800,
 		},
 	},
 	Action: importAction,
@@ -84,12 +84,12 @@ func importAction(ctx *cli.Context) error {
 
 	// we should batch data, avoiding individual transactions to the database.
 	bSize := ctx.Uint("batch-size")
-	eventsBatch := make([]*skylab.BusEvent, bSize)
+	eventsBatch := make([]skylab.BusEvent, bSize)
 
 	batchIdx := 0
 
 	// stats for imports
-	n_packets := 0
+	var n_packets int64 = 0
 	n_unknown := 0
 	n_error := 0
 	for {
@@ -109,29 +109,30 @@ func importAction(ctx *cli.Context) error {
 			continue
 		} else if err != nil {
 			// TODO: we should consider absorbing all errors.
-			fmt.Printf("got an error %v\n", err)
+			fmt.Printf("got an error processing %s: %v\n", line, err)
 			n_error++
 			continue
 		}
-		n_packets++
 		eventsBatch[batchIdx] = f
 		batchIdx++
 		if batchIdx >= int(bSize) {
 			// flush it!!!!
-			err = db.AddEventsCtx(ctx.Context, eventsBatch...)
+			n, err := db.AddEventsCtx(ctx.Context, eventsBatch...)
 			if err != nil {
 				fmt.Printf("error adding to database %v\n", err)
 			}
+			n_packets += n
 			batchIdx = 0 // reset the batch
 		}
 
 	}
 	// check if we have remaining packets and flush them
 	if batchIdx > 0 {
-		err = db.AddEventsCtx(ctx.Context, eventsBatch[:batchIdx]...) // note the slice here!
+		n, err := db.AddEventsCtx(ctx.Context, eventsBatch[:batchIdx]...) // note the slice here!
 		if err != nil {
 			fmt.Printf("error adding to database %v\n", err)
 		}
+		n_packets += n
 	}
 	fmt.Printf("import status: %d successful, %d unknown, %d errors\n", n_packets, n_unknown, n_error)
 

cmd/gotelem/cli/root.go

@@ -1,8 +1,11 @@
 package cli
 
 import (
+	"context"
 	"log"
 	"os"
+	"os/signal"
+	"runtime/pprof"
 
 	"github.com/urfave/cli/v2"
 )
@@ -12,15 +15,42 @@ var subCmds = []*cli.Command{
 	xbeeCmd,
 }
 
+var f os.File
 
 func Execute() {
 	app := &cli.App{
 		Name:  "gotelem",
 		Usage: "see everything",
+		Flags: []cli.Flag{
+			&cli.BoolFlag{
+				Name:  "profile",
+				Usage: "enable profiling",
+			},
+		},
+		Before: func(ctx *cli.Context) error {
+			if ctx.Bool("profile") {
+				f, err := os.Create("cpuprofile")
+				if err != nil {
+					return err
+				}
+				pprof.StartCPUProfile(f)
+			}
+			return nil
+		},
+		After: func(ctx *cli.Context) error {
+			if ctx.Bool("profile") {
+				pprof.StopCPUProfile()
+			}
+			return nil
+		},
 		Commands: subCmds,
 	}
 
-	if err := app.Run(os.Args); err != nil {
+	// setup context for cancellation.
+	ctx := context.Background()
+	ctx, _ = signal.NotifyContext(ctx, os.Interrupt)
+
+	if err := app.RunContext(ctx, os.Args); err != nil {
 		log.Fatal(err)
 	}
 }

cmd/gotelem/cli/server.go

@@ -353,7 +353,7 @@ func (d *dbLoggingService) Start(cCtx *cli.Context, deps svcDeps) (err error) {
 	for {
 		select {
 		case msg := <-rxCh:
-			tdb.AddEventsCtx(cCtx.Context, &msg)
+			tdb.AddEventsCtx(cCtx.Context, msg)
 		case <-cCtx.Done():
 			return
 		}

http.go

@@ -67,7 +67,7 @@ func apiV1(broker *Broker, db *db.TelemDb) chi.Router {
 	r.Route("/packets", func(r chi.Router) {
 		r.Get("/subscribe", apiV1PacketSubscribe(broker, db))
 		r.Post("/", func(w http.ResponseWriter, r *http.Request) {
-			var pkgs []*skylab.BusEvent
+			var pkgs []skylab.BusEvent
 			decoder := json.NewDecoder(r.Body)
 			if err := decoder.Decode(&pkgs); err != nil {
 				w.WriteHeader(http.StatusTeapot)

internal/db/db.go

@@ -17,7 +17,7 @@ import (
 
 func init() {
 	sql.Register("custom_sqlite3", &sqlite3.SQLiteDriver{
-		// TODO: add functions that convert between unix milliseconds and ISO 8601
+		// TODO: add helper that convert between unix milliseconds and sqlite times?
 	})
 }
 
@@ -25,6 +25,7 @@ type TelemDb struct {
 	db *sqlx.DB
 }
 
+// TelemDbOption lets you customize the behavior of the sqlite database
 type TelemDbOption func(*TelemDb) error
 
 func OpenTelemDb(path string, options ...TelemDbOption) (tdb *TelemDb, err error) {
@@ -75,11 +76,11 @@ INSERT INTO "bus_events" (ts, name, data) VALUES
 `
 
 // AddEvent adds the bus event to the database.
-func (tdb *TelemDb) AddEventsCtx(ctx context.Context, events ...*skylab.BusEvent) (err error) {
+func (tdb *TelemDb) AddEventsCtx(ctx context.Context, events ...skylab.BusEvent) (n int64, err error) {
 	//
+	n = 0
 	tx, err := tdb.db.BeginTx(ctx, nil)
 	if err != nil {
-		tx.Rollback()
 		return
 	}
 
@@ -87,41 +88,101 @@ func (tdb *TelemDb) AddEventsCtx(ctx context.Context, events ...*skylab.BusEvent
 	const rowSql = "(?, ?, json(?))"
 	inserts := make([]string, len(events))
 	vals := []interface{}{}
-	for idx, b := range events {
+	idx := 0 // we have to manually increment, because sometimes we don't insert.
+	for _, b := range events {
 		inserts[idx] = rowSql
 		var j []byte
 		j, err = json.Marshal(b.Data)
 
 		if err != nil {
-			tx.Rollback()
-			return
+			// we had some error turning the packet into json.
+			continue // we silently skip.
 		}
+
 		vals = append(vals, b.Timestamp.UnixMilli(), b.Data.String(), j)
+		idx++
 	}
 
 	// construct the full statement now
-	sqlStmt = sqlStmt + strings.Join(inserts, ",")
+	sqlStmt = sqlStmt + strings.Join(inserts[:idx], ",")
 	stmt, err := tx.PrepareContext(ctx, sqlStmt)
 	if err != nil {
 		tx.Rollback()
 		return
 	}
-	//TODO: log the number of rows modified/inserted
-	_, err = stmt.ExecContext(ctx, vals...)
+	res, err := stmt.ExecContext(ctx, vals...)
 	if err != nil {
 		tx.Rollback()
 		return
 	}
+	n, err = res.RowsAffected()
 
 	tx.Commit()
 	return
 }
 
-func (tdb *TelemDb) AddEvents(events ...*skylab.BusEvent) (err error) {
+func (tdb *TelemDb) AddEvents(events ...skylab.BusEvent) (int64, error) {
 
 	return tdb.AddEventsCtx(context.Background(), events...)
 }
 
+// Streaming logger.
+func (tdb *TelemDb) AddEventStreamCtx(ctx context.Context, events <-chan skylab.BusEvent, done chan<- bool) error {
+	const BatchSize = 500
+
+	tx, err := tdb.db.BeginTx(ctx, nil)
+	defer tx.Commit()
+	if err != nil {
+		return err
+	}
+
+	makePreparedStmt := func(ctx context.Context, tx *sql.Tx, n int) (*sql.Stmt, error) {
+		sqlStmt := sqlInsertEvent
+		const rowSql = "(?, ?, json(?))"
+		inserts := make([]string, n)
+		for i := 0; i < n; i++ {
+			inserts[n] = rowSql
+		}
+		sqlStmt = sqlStmt + strings.Join(inserts, ",")
+		return tx.PrepareContext(ctx, sqlStmt)
+	}
+
+	bulkStmt, err := makePreparedStmt(ctx, tx, BatchSize)
+
+	// this is the list of values that we use.
+	valBatch := make([]interface{}, 0, BatchSize * 3)
+	batchIdx := 0
+	for {
+		e, more := <-events
+		if more {
+			j, err := json.Marshal(e.Data)
+			if err != nil {
+				continue // skip things that couldn't be marshalled
+			}
+			valBatch = append(valBatch, e.Timestamp.UnixMilli(), e.Data.String(), j)
+			batchIdx++
+			if batchIdx >= BatchSize {
+				_, err := bulkStmt.ExecContext(ctx, valBatch...)
+				if err != nil {
+					continue
+				}
+			}
+		} else {
+			break
+		}
+
+	}
+	// create a statement for the remaining items.
+	lastStmt, err := makePreparedStmt(ctx, tx, batchIdx)
+	if err != nil {
+		return nil
+	}
+	_, err = lastStmt.ExecContext(ctx, valBatch...)
+	done <- true
+
+	return nil
+}
+
 /// Query fragment guide:
 /// We need to be able to easily construct safe(!) and meaningful queries programatically
 /// so we make some new types that can be turned into SQL fragments that go inside the where clause.

internal/logparsers/parsers.go

@@ -37,9 +37,10 @@ func NewFormatError(msg string, err error) error {
 // A Parser takes a string containing one line of a particular log file
 // and returns an associated skylab.BusEvent representing the packet.
 // if no packet is found, an error is returned instead.
-type ParserFunc func(string) (*skylab.BusEvent, error)
+type ParserFunc func(string) (skylab.BusEvent, error)
 
-func parseCanDumpLine(dumpLine string) (b *skylab.BusEvent, err error) {
+func parseCanDumpLine(dumpLine string) (b skylab.BusEvent, err error) {
+	b = skylab.BusEvent{}
 	// dumpline looks like this:
 	// (1684538768.521889) can0 200#8D643546
 	// remove trailing newline
@@ -74,9 +75,7 @@ func parseCanDumpLine(dumpLine string) (b *skylab.BusEvent, err error) {
 		Kind: can.CanDataFrame,
 	}
 
-	b = &skylab.BusEvent{
-		Timestamp: time.Unix(unixSeconds, unixMicros),
-	}
+	b.Timestamp = time.Unix(unixSeconds, unixMicros)
 
 	b.Data, err = skylab.FromCanFrame(frame)
 
@@ -91,7 +90,8 @@ func parseCanDumpLine(dumpLine string) (b *skylab.BusEvent, err error) {
 	return
 }
 
-func parseTelemLogLine(line string) (b *skylab.BusEvent, err error) {
+func parseTelemLogLine(line string) (b skylab.BusEvent, err error) {
+	b = skylab.BusEvent{}
 	// strip trailng newline since we rely on it being gone
 	line = strings.TrimSpace(line)
 	// data is of the form
@@ -149,9 +149,8 @@ func parseTelemLogLine(line string) (b *skylab.BusEvent, err error) {
 		Kind: can.CanDataFrame,
 	}
 
-	b = &skylab.BusEvent{
-		Timestamp: ts,
-	}
+	b.Timestamp = ts
+	
 	b.Data, err = skylab.FromCanFrame(frame)
 	if err != nil {
 		err = NewFormatError("failed to parse can frame", err)