Golang logrus.Panicf函数代码示例

func main() {
	var err error

	serverAddr, err := net.ResolveUDPAddr("udp", "127.0.0.1:58672")
	if err != nil {
		logrus.Panicf("Error resolving UDP address with %v", err)
	}

	localAddr, err := net.ResolveUDPAddr("udp", "127.0.0.1:0")
	if err != nil {
		logrus.Panicf("Error resolving UDP address with %v", err)
	}

	UDPConn, err := net.DialUDP("udp", localAddr, serverAddr)
	if err != nil {
		logrus.Panicf("Error with dial UDP: %v", err)
	}

	defer UDPConn.Close()
	readBuf := make([]byte, UDPBufSize)
	for {
		read, err := UDPConn.Read(readBuf)
		if err != nil {
			logrus.Print("Read error: %v", err)
			continue
		}

		logrus.Printf("Readed bytes %d with message: %s", read, string(readBuf))
	}
}

func NewFrameworkRiakNode(sc *SchedulerCore, clusterName string, restartGeneration int64, simpleId int) *FrameworkRiakNode {
	nodeCpusFloat, err := strconv.ParseFloat(sc.nodeCpus, 64)
	if err != nil {
		log.Panicf("Unable to determine node_cpus: %+v", err)
	}
	nodeMemFloat, err := strconv.ParseFloat(sc.nodeMem, 64)
	if err != nil {
		log.Panicf("Unable to determine node_mem: %+v", err)
	}
	nodeDiskFloat, err := strconv.ParseFloat(sc.nodeDisk, 64)
	if err != nil {
		log.Panicf("Unable to determine node_disk: %+v", err)
	}

	return &FrameworkRiakNode{
		DestinationState:  process_state.Started,
		CurrentState:      process_state.Unknown,
		Generation:        0,
		reconciled:        false,
		FrameworkName:     sc.frameworkName,
		Role:              &sc.frameworkRole,
		Principal:         &sc.mesosAuthPrincipal,
		SimpleId:          simpleId,
		ClusterName:       clusterName,
		Cpus:              nodeCpusFloat,
		Mem:               nodeMemFloat,
		Disk:              nodeDiskFloat,
		Ports:             PORTS_PER_TASK,
		UUID:              uuid.NewV4().String(),
		ContainerPath:     CONTAINER_PATH,
		RestartGeneration: restartGeneration,
	}
}

func init() {
	kv, err := kvdb.New(mem.Name, "driver_test", []string{}, nil)
	if err != nil {
		log.Panicf("Failed to intialize KVDB")
	}
	err = kvdb.SetInstance(kv)
	if err != nil {
		log.Panicf("Failed to set KVDB instance")
	}
}

func assertTagged(image string) reference.NamedTagged {
	ref, err := reference.Parse(image)
	if err != nil {
		logrus.Panicf("Invalid reference %q: %v", image, err)
	}
	named, ok := ref.(reference.NamedTagged)
	if !ok {
		logrus.Panicf("Image reference must have name and tag: %s", image)
	}

	return named
}

func init() {
	kv, err := kvdb.New(mem.Name, "driver_test", []string{}, nil)
	if err != nil {
		logrus.Panicf("Failed to intialize KVDB")
	}
	err = kvdb.SetInstance(kv)
	if err != nil {
		logrus.Panicf("Failed to set KVDB instance")
	}

	e = NewDefaultEnumerator("enumerator_test", kv)
}

func DumpStore(dbName string) {

	db, err := bolt.Open(dbName, 0600, &bolt.Options{Timeout: 1 * time.Second})
	if err != nil {
		log.Panicf("unable to open %s, error: %v\n", dbName, err)
	}
	db.View(func(tx *bolt.Tx) error {
		b := tx.Bucket([]byte("events"))
		b.ForEach(func(k, v []byte) error {

			seq, err := readSequence(k)
			if err != nil {
				log.Errorf("Error decoding sequence number %v", err)
			}

			evt, err := decodeEvent(v)
			if err != nil {
				log.Errorf("Error decoding event %v", err)
			}
			body := strings.Replace(string(evt.Body), "\n", "\\n", -1)
			fmt.Printf("key=%d, value={channel:\"%s\", body:\"%s\"}\n", seq, evt.Channel, body)
			return nil
		})
		return nil
	})
}

func GetReader(config []byte) Reader {
	var err error

	br := BaseReader{}
	err = json.Unmarshal(config, &br)
	if err != nil {
		logrus.Error(err)
		logrus.Fatal("Missing reader name and/or type")
	}

	var r Reader

	switch br.Type {
	default:
		logrus.Panicf("Unrecognized reader type: %#v", br)
	case "FileReader":
		fr := FileReader{}
		err = json.Unmarshal(config, &fr)
		r = &fr
	}

	if err != nil {
		logrus.Error(err)
		logrus.Fatal(fmt.Sprintf("Invalid configuration for %#v", br))
	}

	return r
}

func Listening() {
	defer func() {
		if sm.l != nil {
			sm.l.Close()
		}
	}()
	l, err := net.Listen("tcp", sm.config.ProxyPort)
	if err != nil {
		log.Panicf("switch manager Listening panic, err:%s\n", err.Error())
	}
	sm.l = l
	var i = 1
	for {
		sm.rwMutex.RLock()
		if sm.closed {
			sm.rwMutex.RUnlock()
			break
		} else {
			sm.rwMutex.RUnlock()
		}
		conn, err := sm.l.Accept()
		if err != nil {
			log.Errorf("sm.l.Accept error:%+v\n", err.Error())
		} else {
			log.Infof("accept connection count %d\n", i)
			go handleConn(sm, conn)
		}

		i++
	}
}

// Create schema
func createSchema() {
	dbDir := filepath.Dir(*flags.DBPath)
	if _, err := os.Stat(dbDir); os.IsNotExist(err) {
		os.MkdirAll(dbDir, 0777)
		log.Infof("Created directory path=%s", dbDir)
	}
	db, _ := connection()
	defer db.Close()
	stmt, err := db.Prepare(`
		CREATE TABLE notes (
			uid string,
			created string,
			updated string,
			tags string,
			content string,
			encrypted INTEGER DEFAULT 0,
			subject TEXT
		);`)
	if err != nil {
		if err.Error() != "table notes already exists" {
			log.Panicf("Unable to prepare schema path=%s, err=%v", *flags.DBPath, err)
		}
		return
	}
	_, err = stmt.Exec()
	if err != nil {
		log.Errorf("Unable to create schema err=%v", err)
	}
	log.Infof("Schema created path=%s", *flags.DBPath)

}

func main() {
	log.Infof("Starting up Popular DNS for domain `%s`...", config.Domain)

	cfClient, err := cloudflare.NewClient(config.CloudFlareEmail, config.CloudFlareToken)
	if err != nil {
		log.Panicf("Could not create CloudFlare client for email `%s`: %v", config.CloudFlareEmail, err)
	} else {
		cf = cfClient
	}

	record, err := createOrGetRecord(config.Domain, config.Domain)
	if err != nil {
		log.Panic(err)
	} else {
		recordId = record.Id
	}

	store = NewDomainStore(config.FirebaseURL, config.FirebaseAuth)

	http.Handle("/ui/dist/", http.StripPrefix("/ui/dist/", http.FileServer(http.Dir("ui/dist"))))
	http.HandleFunc("/set", set)
	http.HandleFunc("/", view)
	http.ListenAndServe(":8080", nil)

}

func init() {
	configFile := defaultConfigFile
	if configFileEnv := os.Getenv("CONFIG_FILE"); len(configFileEnv) != 0 {
		configFile = configFileEnv
	}

	data, err := ioutil.ReadFile(configFile)
	if err != nil {
		log.Panicf("Could not read configuration file: %v", err)
	}

	err = json.Unmarshal(data, &config)
	if err != nil {
		log.Panicf("Could not unmarshal configuration struct from file `%s`: %v", configFile, err)
	}
}

// Init Refcounts. Discover volume usage refcounts from Docker.
// This functions does not sync with mount/unmount handlers and should be called
// and completed BEFORE we start accepting Mount/unmount requests.
func (r refCountsMap) Init(d *vmdkDriver) {
	c, err := client.NewClient(dockerUSocket, apiVersion, nil, defaultHeaders)
	if err != nil {
		log.Panicf("Failed to create client for Docker at %s.( %v)",
			dockerUSocket, err)
	}
	log.Infof("Getting volume data from %s", dockerUSocket)
	info, err := c.Info(context.Background())
	if err != nil {
		log.Infof("Can't connect to %s, skipping discovery", dockerUSocket)
		// TODO: Issue #369
		// Docker is not running, inform ESX to detach docker volumes, if any
		// d.detachAllVolumes()
		return
	}
	log.Debugf("Docker info: version=%s, root=%s, OS=%s",
		info.ServerVersion, info.DockerRootDir, info.OperatingSystem)

	// connects (and polls if needed) and then calls discovery
	err = r.discoverAndSync(c, d)
	if err != nil {
		log.Errorf("Failed to discover mount refcounts(%v)", err)
		return
	}

	log.Infof("Discovered %d volumes in use.", len(r))
	for name, cnt := range r {
		log.Infof("Volume name=%s count=%d mounted=%t device='%s'",
			name, cnt.count, cnt.mounted, cnt.dev)
	}
}

// connection to a sqlite database (currently hard coded for testing)
func connection() (*sql.DB, error) {
	db, err := sql.Open("sqlite3", *flags.DBPath)
	if err != nil {
		log.Panicf("Unable to open database path=%s, err=%v", *flags.DBPath, err)
	}
	return db, err
}

func getTestDb() *gorm.DB {
	if test_db != nil {
		return test_db
	}
	db, err := gorm.Open("sqlite3", "./api-test.db")

	if err != nil {
		log.Panicf("Error opening sqlite3 database in test %v\n", err)
	}

	db.DropTable(&User{})
	db.DropTable(&PrivateWidget{})
	db.DropTable(&Widget{})
	db.DropTable(&VerifiedWidget{})
	db.CreateTable(&User{})
	db.CreateTable(&PrivateWidget{})
	db.CreateTable(&Widget{})
	db.CreateTable(&VerifiedWidget{})

	var private_widgets []PrivateWidget
	db.Model(&User{}).Related(&private_widgets)

	db.Create(&User{Name: "admin", Password: "password"})

	db.Create(&Widget{ID: 1, Name: "Widget 1"})
	db.Create(&Widget{ID: 2, Name: "Widget 2"})
	db.Create(&Widget{ID: 3, Name: "Widget 3"})

	test_db = &db
	if *verboseMartini {
		test_db = test_db.Debug()
	}
	return test_db
}

func (r *RoundRobinPeerSelector) SetMaxLen(m uint32) {
	if m > math.MaxUint16 {
		log.Panicf("Number of peers %v greater than those suported %v",
			m, math.MaxUint16)
	}
	atomic.StoreUint32(&r.maxLen, m)
}