Change heartbeat type to unsigned int

Check if heartbeat value is greater than zero

Signed-off-by: Sriram Natarajan <natarajan.sriram@gmail.com>

cluster/options.go

@@ -7,5 +7,5 @@ type Options struct {
 	TLSConfig       *tls.Config
 	OvercommitRatio float64
 	Discovery       string
-	Heartbeat       int
+	Heartbeat       uint64
 }

discovery/consul/consul.go

@@ -24,7 +24,7 @@ func init() {
 }
 
 // Initialize is exported
-func (s *ConsulDiscoveryService) Initialize(uris string, heartbeat int) error {
+func (s *ConsulDiscoveryService) Initialize(uris string, heartbeat uint64) error {
 	parts := strings.SplitN(uris, "/", 2)
 	if len(parts) < 2 {
 		return fmt.Errorf("invalid format %q, missing <path>", uris)

discovery/discovery.go

@@ -33,7 +33,7 @@ type WatchCallback func(entries []*Entry)
 
 // DiscoveryService is exported
 type DiscoveryService interface {
-	Initialize(string, int) error
+	Initialize(string, uint64) error
 	Fetch() ([]*Entry, error)
 	Watch(WatchCallback)
 	Register(string) error
@@ -73,7 +73,7 @@ func parse(rawurl string) (string, string) {
 }
 
 // New is exported
-func New(rawurl string, heartbeat int) (DiscoveryService, error) {
+func New(rawurl string, heartbeat uint64) (DiscoveryService, error) {
 	scheme, uri := parse(rawurl)
 
 	if discovery, exists := discoveries[scheme]; exists {

discovery/etcd/etcd.go

@@ -22,7 +22,7 @@ func init() {
 }
 
 // Initialize is exported
-func (s *EtcdDiscoveryService) Initialize(uris string, heartbeat int) error {
+func (s *EtcdDiscoveryService) Initialize(uris string, heartbeat uint64) error {
 	var (
 		// split here because uris can contain multiples ips
 		// like `etcd://192.168.0.1,192.168.0.2,192.168.0.3/path`

discovery/file/file.go

@@ -10,7 +10,7 @@ import (
 
 // FileDiscoveryService is exported
 type FileDiscoveryService struct {
-	heartbeat int
+	heartbeat uint64
 	path      string
 }
 
@@ -19,7 +19,7 @@ func init() {
 }
 
 // Initialize is exported
-func (s *FileDiscoveryService) Initialize(path string, heartbeat int) error {
+func (s *FileDiscoveryService) Initialize(path string, heartbeat uint64) error {
 	s.path = path
 	s.heartbeat = heartbeat
 	return nil

discovery/nodes/nodes.go

@@ -16,7 +16,7 @@ func init() {
 }
 
 // Initialize is exported
-func (s *NodesDiscoveryService) Initialize(uris string, _ int) error {
+func (s *NodesDiscoveryService) Initialize(uris string, _ uint64) error {
 	for _, input := range strings.Split(uris, ",") {
 		for _, ip := range discovery.Generate(input) {
 			entry, err := discovery.NewEntry(ip)

discovery/token/token.go

@@ -17,7 +17,7 @@ const DiscoveryURL = "https://discovery-stage.hub.docker.com/v1"
 
 // TokenDiscoveryService is exported
 type TokenDiscoveryService struct {
-	heartbeat int
+	heartbeat uint64
 	url       string
 	token     string
 }
@@ -27,7 +27,7 @@ func init() {
 }
 
 // Initialize is exported
-func (s *TokenDiscoveryService) Initialize(urltoken string, heartbeat int) error {
+func (s *TokenDiscoveryService) Initialize(urltoken string, heartbeat uint64) error {
 	if i := strings.LastIndex(urltoken, "/"); i != -1 {
 		s.url = "https://" + urltoken[:i]
 		s.token = urltoken[i+1:]

discovery/zookeeper/zookeeper.go

@@ -15,7 +15,7 @@ import (
 type ZkDiscoveryService struct {
 	conn      *zk.Conn
 	path      []string
-	heartbeat int
+	heartbeat uint64
 }
 
 func init() {
@@ -41,7 +41,7 @@ func (s *ZkDiscoveryService) createFullpath() error {
 }
 
 // Initialize is exported
-func (s *ZkDiscoveryService) Initialize(uris string, heartbeat int) error {
+func (s *ZkDiscoveryService) Initialize(uris string, heartbeat uint64) error {
 	var (
 		// split here because uris can contain multiples ips
 		// like `zk://192.168.0.1,192.168.0.2,192.168.0.3/path`

join.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"regexp"
+	"strconv"
 	"time"
 
 	log "github.com/Sirupsen/logrus"
@@ -20,7 +21,12 @@ func join(c *cli.Context) {
 		log.Fatalf("discovery required to join a cluster. See '%s join --help'.", c.App.Name)
 	}
 
-	d, err := discovery.New(dflag, c.Int("heartbeat"))
+	hb, err := strconv.ParseUint(c.String("heartbeat"), 0, 32)
+	if hb < 1 || err != nil {
+		log.Fatal("--heartbeat should be an unsigned integer and greater than 0")
+	}
+
+	d, err := discovery.New(dflag, hb)
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -35,10 +41,10 @@ func join(c *cli.Context) {
 		log.Fatal(err)
 	}
 
-	hb := time.Duration(c.Int("heartbeat"))
+	hbval := time.Duration(hb)
 	for {
-		log.WithFields(log.Fields{"addr": addr, "discovery": dflag}).Infof("Registering on the discovery service every %d seconds...", hb)
+		log.WithFields(log.Fields{"addr": addr, "discovery": dflag}).Infof("Registering on the discovery service every %d seconds...", hbval)
-		time.Sleep(hb * time.Second)
+		time.Sleep(hbval * time.Second)
 		if err := d.Register(addr); err != nil {
 			log.Error(err)
 		}

manage.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"io/ioutil"
 	"path"
+	"strconv"
 
 	log "github.com/Sirupsen/logrus"
 	"github.com/codegangsta/cli"
@@ -120,11 +121,15 @@ func manage(c *cli.Context) {
 	sched := scheduler.New(s, fs)
 
 	eventsHandler := api.NewEventsHandler()
+	hb, err := strconv.ParseUint(c.String("heartbeat"), 0, 32)
+	if hb < 1 || err != nil {
+		log.Fatal("--heartbeat should be an unsigned integer and greater than 0")
+	}
 	options := &cluster.Options{
 		TLSConfig:       tlsConfig,
 		OvercommitRatio: c.Float64("overcommit"),
 		Discovery:       dflag,
-		Heartbeat:       c.Int("heartbeat"),
+		Heartbeat:       hb,
 	}
 
 	cluster := swarm.NewCluster(sched, store, eventsHandler, options)