func TestNatsLeaderElection(t *testing.T) {
s := test.RunServer(&test.DefaultTestOptions)
defer s.Shutdown()
toStart := 5
nodes := createNatsNodes(t, "nats_test", toStart)
// Do cleanup
for _, n := range nodes {
defer n.Close()
}
// Wait for Election
expectedClusterState(t, nodes, 1, toStart-1, 0)
// Make sure he stays the leader (heartbeat functionality)
leader := findLeader(nodes)
// Wait for Election timout
time.Sleep(MAX_ELECTION_TIMEOUT)
if newLeader := findLeader(nodes); newLeader != leader {
t.Fatalf("Expected leader to keep power, was %q, now %q\n",
leader.Id(), newLeader.Id())
}
// Now close the leader, make sure someone else gets elected
leader.Close()
// Wait for Election
expectedClusterState(t, nodes, 1, toStart-2, 0)
}
func runMonitorServer(monitorPort int) *server.Server {
resetPreviousHTTPConnections()
opts := gnatsd.DefaultTestOptions
opts.Host = "127.0.0.1"
opts.Port = GNATSD_PORT
opts.HTTPPort = monitorPort
return gnatsd.RunServer(&opts)
}
func TestNatsLeaderElection(t *testing.T) {
test.RunServer(&test.DefaultTestOptions)
toStart := 5
nodes := createNatsNodes(t, "nats_test", toStart)
// Do cleanup
for _, n := range nodes {
defer n.Close()
}
// Wait for Election
time.Sleep(MAX_ELECTION_TIMEOUT)
leaders, followers, candidates := countTypes(nodes)
if leaders != 1 {
t.Fatalf("Expected 1 Leader, got %d\n", leaders)
}
if followers != toStart-1 {
t.Fatalf("Expected %d Followers, got %d\n", toStart-1, followers)
}
if candidates != 0 {
t.Fatalf("Expected 0 Candidates, got %d\n", candidates)
}
// Make sure he stays the leader (heartbeat functionality)
leader := findLeader(nodes)
// Wait for Election timout
time.Sleep(MAX_ELECTION_TIMEOUT)
if newLeader := findLeader(nodes); newLeader != leader {
t.Fatalf("Expected leader to keep power, was %q, now %q\n",
leader.Id(), newLeader.Id())
}
// Now close the leader, make sure someone else gets elected
leader.Close()
// Wait for Election
time.Sleep(MAX_ELECTION_TIMEOUT)
leaders, followers, candidates = countTypes(nodes)
if leaders != 1 {
t.Fatalf("Expected 1 Leader, got %d\n", leaders)
}
if followers != toStart-2 {
t.Fatalf("Expected %d Followers, got %d\n", toStart-2, followers)
}
if candidates != 0 {
t.Fatalf("Expected 0 Candidates, got %d\n", candidates)
}
}
func (s *gnatsdService) Start() (int, error) {
// perform default check
opts := gnatsdtest.DefaultTestOptions
opts.Port = gnatsd.RANDOM_PORT
s.gnatsd = gnatsdtest.RunServer(&opts)
addr := s.gnatsd.Addr()
_, port, _ := net.SplitHostPort(addr.String())
gnatsdPort, _ := strconv.Atoi(port)
return gnatsdPort, nil
}
func TestMain(m *testing.M) {
var err error
gnatsd := test.RunServer(&TestOptions)
defer gnatsd.Shutdown()
options := DefaultOptions
options.Servers = []string{DefaultURL}
if gnatsd != nil {
bq, err = NewBasicQueue(&options, DefaultEncoder)
if err != nil {
panic(err)
}
} else {
panic("Could not start NATS queue")
}
ret := m.Run()
os.Exit(ret)
}
func RunServerWithOptions(opts server.Options) *server.Server {
return gnatsd.RunServer(&opts)
}
func Test003ArchiverAcknowledgesStorage(t *testing.T) {
cv.Convey("given a running gnatsd, the archiver should store messages to disk and acknowledge their storage on the 'servicename.storage-ack.(hostname)' subject.", t, func() {
user := "******"
pw := "password"
host := "127.0.0.1"
port := 4444
serverList := fmt.Sprintf("nats://%v:%v@%v:%v", user, pw, host, port)
// start yourself an embedded gnatsd server
opts := server.Options{
Host: host,
Port: port,
Username: user,
Password: pw,
Trace: true,
Debug: true,
//NoLog: true,
//NoSigs: true,
}
gnats := gnatsd.RunServer(&opts)
gnats.SetLogger(&Logger{}, true, true)
//logger := log.New(os.Stderr, "gnatsd: ", log.LUTC|log.Ldate|log.Ltime|log.Lmicroseconds|log.Llongfile)
defer func() {
p("calling gnats.Shutdown()")
gnats.Shutdown() // when done
}()
addr := fmt.Sprintf("%v:%v", host, port)
if !PortIsBound(addr) {
panic("port not bound " + addr)
}
// start client
asyncHandler := nats.ErrorHandler(func(c *nats.Conn, s *nats.Subscription, e error) {
fmt.Printf("\n *** async error handler sees error: '%s'\n", e)
panic(e)
})
p("about to connect with client")
nc, err := nats.Connect(serverList, asyncHandler)
panicOn(err)
defer nc.Close()
// prep data
p("prepping data")
streamName := "test"
data1 := []byte("data1")
tm1, err := time.Parse(time.RFC3339, "2016-01-01T00:00:00Z")
panicOn(err)
frame1, err := ts.NewFrame(tm1, ts.EvUtf8, 0, 0, data1)
panicOn(err)
framed, err := frame1.Marshal(nil)
panicOn(err)
// subscribe to reply in advance of publishing archive request
gotAck := make(chan *nats.Msg)
nc.Subscribe(ServiceName+".storage-ack.>", func(msgNats *nats.Msg) {
p(ServiceName+".storage-ack received msg: '%#v'", msgNats)
select {
case <-gotAck:
// already closed; don't do it again
p(ServiceName + ".storage-ack already closed, skipping this time")
default:
p(ServiceName + ".storage-ack closing gotAck")
close(gotAck)
}
})
// start an archiver to catch our request
tmp, err := ioutil.TempDir("", "test-archiver-filemgr")
panicOn(err)
defer os.RemoveAll(tmp)
fm := NewFileMgr(&ArchiverConfig{WriteDir: tmp,
ServerList: serverList})
go func() {
err := fm.Run()
panicOn(err)
}()
<-fm.Ready
p("archiver_test: fm.Ready received")
defer fm.Stop()
// make the achiving request: write data to server
subj := ServiceName + ".archive." + streamName
err = nc.Publish(subj, framed)
if err != nil {
panic(fmt.Errorf("Got an error on nc.Publish(): %+v\n", err))
}
nc.Flush()
p("Published to subject '%s' %v bytes", subj, len(framed))
reply, err := nc.Request(subj, framed, 1000*time.Millisecond)
if err != nil {
p("\n ----------->>>>>>> Request got err back: '%s'\n", err)
panic(fmt.Errorf("Error in Request: %v\n", err))
}
p("003ArchiverAck test sent request, got reply: '%#v' with Data '%s'", reply, string(reply.Data))
cv.So(strings.HasPrefix(reply.Subject, "_INBOX."), cv.ShouldBeTrue)
// verify reply or panic after timeout
timeout := 2 * time.Second
select {
case <-gotAck:
// cool
p("successfully got ack!")
case <-time.After(timeout):
panic(fmt.Errorf("timeout after %v waiting for reply", timeout))
}
})
}
