Golang glog.Fatalln函数代码示例

func configFrom(file string) *config.Config {
	// Find the file...
	if file != "" {
		if _, err := os.Stat(file); os.IsNotExist(err) {
			glog.Fatalln("Cannot find specified configuration file", file, ", aborting.")
		}
	} else if _, err := os.Stat(os.Getenv("CAYLEY_CFG")); err == nil {
		file = os.Getenv("CAYLEY_CFG")
	} else if _, err := os.Stat("/etc/cayley.cfg"); err == nil {
		file = "/etc/cayley.cfg"
	}
	if file == "" {
		glog.Infoln("Couldn't find a config file in either $CAYLEY_CFG or /etc/cayley.cfg. Going by flag defaults only.")
	}
	cfg, err := config.Load(file)
	if err != nil {
		glog.Fatalln(err)
	}
	if cfg.DatabasePath == "" {
		cfg.DatabasePath = *databasePath
	}

	if cfg.DatabaseType == "" {
		cfg.DatabaseType = *databaseBackend
	}
	return cfg
}

func init() {
	glog.SetToStderr(true)
	cfg, err := configFrom("cayley_appengine.cfg")
	if err != nil {
		glog.Fatalln("Error loading config:", err)
	}

	handle, err := db.Open(cfg)
	if err != nil {
		glog.Fatalln("Error opening database:", err)
	}
	http.SetupRoutes(handle, cfg)
}

func ReadTriplesFromFile(c chan *graph.Triple, tripleFile string) {
	f, err := os.Open(tripleFile)
	if err != nil {
		glog.Fatalln("Couldn't open file", tripleFile)
	}

	defer func() {
		if err := f.Close(); err != nil {
			glog.Fatalln(err)
		}
	}()

	nquads.ReadNQuadsFromReader(c, f)
}

func ReadNQuadsFromReader(c chan *graph.Triple, reader io.Reader) {
	bf := bufio.NewReader(reader)

	nTriples := 0
	line := ""
	for {
		l, pre, err := bf.ReadLine()
		if err == io.EOF {
			break
		}
		if err != nil {
			glog.Fatalln("Something bad happened while reading file " + err.Error())
		}
		line += string(l)
		if pre {
			continue
		}
		triple := Parse(line)
		line = ""
		if triple != nil {
			nTriples++
			c <- triple
		}
	}
	glog.Infoln("Read", nTriples, "triples")
	close(c)
}

func ParseConfigFromFile(filename string) *CayleyConfig {
	config := &CayleyConfig{}
	if filename == "" {
		return config
	}
	f, err := os.Open(filename)
	if err != nil {
		glog.Fatalln("Couldn't open config file", filename)
	}

	defer f.Close()

	dec := json.NewDecoder(f)
	err = dec.Decode(config)
	if err != nil {
		glog.Fatalln("Couldn't read config file:", err)
	}
	return config
}

func findAssetsPath() string {
	if *assetsPath != "" {
		if hasAssets(*assetsPath) {
			return *assetsPath
		}
		glog.Fatalln("Cannot find assets at", *assetsPath, ".")
	}

	if hasAssets(".") {
		return "."
	}

	gopathPath := os.ExpandEnv("$GOPATH/src/github.com/google/cayley")
	if hasAssets(gopathPath) {
		return gopathPath
	}
	glog.Fatalln("Cannot find assets in any of the default search paths. Please run in the same directory, in a Go workspace, or set --assets .")
	panic("cannot reach")
}

func ParseConfigFromFlagsAndFile(fileFlag string) *Config {
	// Find the file...
	var trueFilename string
	if fileFlag != "" {
		if _, err := os.Stat(fileFlag); os.IsNotExist(err) {
			glog.Fatalln("Cannot find specified configuration file", fileFlag, ", aborting.")
		} else {
			trueFilename = fileFlag
		}
	} else {
		if _, err := os.Stat(os.Getenv("CAYLEY_CFG")); err == nil {
			trueFilename = os.Getenv("CAYLEY_CFG")
		} else {
			if _, err := os.Stat("/etc/cayley.cfg"); err == nil {
				trueFilename = "/etc/cayley.cfg"
			}
		}
	}
	if trueFilename == "" {
		glog.Infoln("Couldn't find a config file in either $CAYLEY_CFG or /etc/cayley.cfg. Going by flag defaults only.")
	}
	config := ParseConfigFromFile(trueFilename)

	if config.DatabasePath == "" {
		config.DatabasePath = *databasePath
	}

	if config.DatabaseType == "" {
		config.DatabaseType = *databaseBackend
	}

	if config.ReplicationType == "" {
		config.ReplicationType = *replicationBackend
	}

	if config.ListenHost == "" {
		config.ListenHost = *host
	}

	if config.ListenPort == "" {
		config.ListenPort = *port
	}

	if config.Timeout == 0 {
		config.Timeout = *timeout
	}

	if config.LoadSize == 0 {
		config.LoadSize = *loadSize
	}

	config.ReadOnly = config.ReadOnly || *readOnly

	return config
}

func (d OptionsDict) GetIntKey(key string) (int, bool) {
	if val, ok := d[key]; ok {
		switch vv := val.(type) {
		case float64:
			return int(vv), true
		default:
			glog.Fatalln("Invalid", key, "parameter type from config.")
		}
	}
	return 0, false
}

func (d OptionsDict) GetStringKey(key string) (string, bool) {
	if val, ok := d[key]; ok {
		switch vv := val.(type) {
		case string:
			return vv, true
		default:
			glog.Fatalln("Invalid", key, "parameter type from config.")
		}
	}
	return "", false
}

func (d Options) BoolKey(key string) (bool, bool) {
	if val, ok := d[key]; ok {
		switch vv := val.(type) {
		case bool:
			return vv, true
		default:
			glog.Fatalln("Invalid", key, "parameter type from config.")
		}
	}
	return false, false
}

func (api *API) ServeV1WriteNQuad(w http.ResponseWriter, r *http.Request, params httprouter.Params) int {
	if api.config.ReadOnly {
		return jsonResponse(w, 400, "Database is read-only.")
	}

	formFile, _, err := r.FormFile("NQuadFile")
	if err != nil {
		glog.Errorln(err)
		return jsonResponse(w, 500, "Couldn't read file: "+err.Error())
	}
	defer formFile.Close()

	blockSize, blockErr := strconv.ParseInt(r.URL.Query().Get("block_size"), 10, 64)
	if blockErr != nil {
		blockSize = int64(api.config.LoadSize)
	}

	quadReader, err := internal.Decompressor(formFile)
	// TODO(kortschak) Make this configurable from the web UI.
	dec := cquads.NewDecoder(quadReader)

	h, err := api.GetHandleForRequest(r)
	if err != nil {
		return jsonResponse(w, 400, err)
	}

	var (
		n     int
		block = make([]quad.Quad, 0, blockSize)
	)
	for {
		t, err := dec.Unmarshal()
		if err != nil {
			if err == io.EOF {
				break
			}
			glog.Fatalln("what can do this here?", err) // FIXME(kortschak)
		}
		block = append(block, t)
		n++
		if len(block) == cap(block) {
			h.QuadWriter.AddQuadSet(block)
			block = block[:0]
		}
	}
	h.QuadWriter.AddQuadSet(block)

	fmt.Fprintf(w, "{\"result\": \"Successfully wrote %d quads.\"}", n)

	return 200
}

func Load(ts graph.TripleStore, cfg *config.Config, path string) error {
	f, err := os.Open(path)
	if err != nil {
		return fmt.Errorf("could not open file %q: %v", path, err)
	}
	defer f.Close()

	r, err := decompressor(f)
	if err != nil {
		glog.Fatalln(err)
	}

	dec := cquads.NewDecoder(r)

	bulker, canBulk := ts.(graph.BulkLoader)
	if canBulk {
		err = bulker.BulkLoad(dec)
		if err == nil {
			return nil
		}
		if err == graph.ErrCannotBulkLoad {
			err = nil
		}
	}
	if err != nil {
		return err
	}

	block := make([]*quad.Quad, 0, cfg.LoadSize)
	for {
		t, err := dec.Unmarshal()
		if err != nil {
			if err == io.EOF {
				break
			}
			return err
		}
		block = append(block, t)
		if len(block) == cap(block) {
			ts.AddTripleSet(block)
			block = block[:0]
		}
	}
	ts.AddTripleSet(block)

	return nil
}

func main() {
	// No command? It's time for usage.
	if len(os.Args) == 1 {
		Usage()
		os.Exit(1)
	}

	cmd := os.Args[1]
	var newargs []string
	newargs = append(newargs, os.Args[0])
	newargs = append(newargs, os.Args[2:]...)
	os.Args = newargs
	flag.Parse()

	var buildString string
	if VERSION != "" {
		buildString = fmt.Sprint("Cayley ", VERSION, " built ", BUILD_DATE)
		glog.Infoln(buildString)
	}

	cfg := config.ParseConfigFromFlagsAndFile(*configFile)

	if os.Getenv("GOMAXPROCS") == "" {
		runtime.GOMAXPROCS(runtime.NumCPU())
		glog.Infoln("Setting GOMAXPROCS to", runtime.NumCPU())
	} else {
		glog.Infoln("GOMAXPROCS currently", os.Getenv("GOMAXPROCS"), " -- not adjusting")
	}

	var (
		ts  graph.TripleStore
		err error
	)
	switch cmd {
	case "version":
		if VERSION != "" {
			fmt.Println(buildString)
		} else {
			fmt.Println("Cayley snapshot")
		}
		os.Exit(0)
	case "init":
		err = db.Init(cfg, *tripleFile)
	case "load":
		ts, err = db.Open(cfg)
		if err != nil {
			break
		}
		err = db.Load(ts, cfg, *tripleFile)
		if err != nil {
			break
		}
		ts.Close()
	case "repl":
		ts, err = db.Open(cfg)
		if err != nil {
			break
		}
		err = db.Repl(ts, *queryLanguage, cfg)
		if err != nil {
			break
		}
		ts.Close()
	case "http":
		ts, err = db.Open(cfg)
		if err != nil {
			break
		}
		http.Serve(ts, cfg)
		ts.Close()
	default:
		fmt.Println("No command", cmd)
		flag.Usage()
	}
	if err != nil {
		glog.Fatalln(err)
	}
}

func (it *AllIterator) Result() graph.Value {
	if it.result == nil {
		glog.Fatalln("result was nil", it)
	}
	return it.result
}

func main() {
	// No command? It's time for usage.
	if len(os.Args) == 1 {
		Usage()
		os.Exit(1)
	}

	cmd := os.Args[1]
	newargs := make([]string, 0)
	newargs = append(newargs, os.Args[0])
	newargs = append(newargs, os.Args[2:]...)
	os.Args = newargs
	flag.Parse()

	cfg := config.ParseConfigFromFlagsAndFile(*configFile)

	if os.Getenv("GOMAXPROCS") == "" {
		runtime.GOMAXPROCS(runtime.NumCPU())
		glog.Infoln("Setting GOMAXPROCS to", runtime.NumCPU())
	} else {
		glog.Infoln("GOMAXPROCS currently", os.Getenv("GOMAXPROCS"), " -- not adjusting")
	}

	var (
		ts  graph.TripleStore
		err error
	)
	switch cmd {
	case "init":
		err = db.Init(cfg, *tripleFile)
	case "load":
		ts, err = db.Open(cfg)
		if err != nil {
			break
		}
		err = db.Load(ts, cfg, *tripleFile)
		if err != nil {
			break
		}
		ts.Close()
	case "repl":
		ts, err = db.Open(cfg)
		if err != nil {
			break
		}
		err = db.Repl(ts, *queryLanguage, cfg)
		if err != nil {
			break
		}
		ts.Close()
	case "http":
		ts, err = db.Open(cfg)
		if err != nil {
			break
		}
		http.Serve(ts, cfg)
		ts.Close()
	default:
		fmt.Println("No command", cmd)
		flag.Usage()
	}
	if err != nil {
		glog.Fatalln(err)
	}
}