func main() {
log.SetPrefix("write_entries: ")
flag.Parse()
if *numWorkers < 1 {
flagutil.UsageErrorf("Invalid number of --workers %d (must be ≥ 1)", *numWorkers)
} else if *batchSize < 1 {
flagutil.UsageErrorf("Invalid --batch_size %d (must be ≥ 1)", *batchSize)
} else if gs == nil {
flagutil.UsageError("Missing --graphstore")
}
defer gsutil.LogClose(context.Background(), gs)
gsutil.EnsureGracefulExit(gs)
if *profCPU != "" {
f, err := vfs.Create(context.Background(), *profCPU)
if err != nil {
log.Fatal(err)
}
defer f.Close()
pprof.StartCPUProfile(f)
defer pprof.StopCPUProfile()
}
writes := graphstore.BatchWrites(stream.ReadEntries(os.Stdin), *batchSize)
var (
wg sync.WaitGroup
numEntries uint64
)
wg.Add(*numWorkers)
for i := 0; i < *numWorkers; i++ {
go func() {
defer wg.Done()
num, err := writeEntries(context.Background(), gs, writes)
if err != nil {
log.Fatal(err)
}
atomic.AddUint64(&numEntries, num)
}()
}
wg.Wait()
log.Printf("Wrote %d entries", numEntries)
}
func main() {
flag.Parse()
if len(flag.Args()) > 2 || (gs != nil && len(flag.Args()) > 1) {
fmt.Fprintf(os.Stderr, "ERROR: too many arguments %v\n", flag.Args())
flag.Usage()
os.Exit(1)
}
if gs != nil {
defer gsutil.LogClose(context.Background(), gs)
}
var in io.ReadCloser = os.Stdin
if gs == nil && len(flag.Args()) > 0 {
file, err := vfs.Open(context.Background(), flag.Arg(0))
if err != nil {
log.Fatalf("Failed to open input file %q: %v", flag.Arg(0), err)
}
defer file.Close()
in = file
}
outIdx := 1
if gs != nil {
outIdx = 0
}
var out io.WriteCloser = os.Stdout
if len(flag.Args()) > outIdx {
file, err := vfs.Create(context.Background(), flag.Arg(outIdx))
if err != nil {
log.Fatalf("Failed to create output file %q: %v", flag.Arg(outIdx), err)
}
defer file.Close()
out = file
}
var (
entries <-chan *spb.Entry
reverseEdges int
triples int
)
if gs == nil {
entries = stream.ReadEntries(in)
} else {
ch := make(chan *spb.Entry)
entries = ch
go func() {
defer close(ch)
if err := gs.Scan(context.Background(), &spb.ScanRequest{}, func(e *spb.Entry) error {
ch <- e
return nil
}); err != nil {
log.Fatalf("Error scanning graphstore: %v", err)
}
}()
}
for entry := range entries {
if schema.EdgeDirection(entry.EdgeKind) == schema.Reverse && !*keepReverseEdges {
reverseEdges++
continue
}
t, err := toTriple(entry)
if err != nil {
log.Fatal(err)
}
fmt.Fprintln(out, t)
triples++
}
if !*quiet {
if !*keepReverseEdges {
log.Printf("Skipped %d reverse edges", reverseEdges)
}
log.Printf("Wrote %d triples", triples)
}
}