// Connect to a STOMP broker, publish some messages and disconnect.
func main() {
st := time.Now()
// Standard example connect sequence
n, conn, e := sngecomm.CommonConnect(exampid, tag, ll)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s main_on_connect error:%v",
exampid, tag, sngecomm.Lcs,
e.Error()) // Handle this ......
}
// *NOTE* application specific functionaltiy starts here!
sh := stompngo.Headers{"destination", sngecomm.Dest()}
ll.Printf("%stag:%s connsess:%s destination dest:%s\n",
exampid, tag, conn.Session(),
sngecomm.Dest())
if senv.Persistent() {
sh = sh.Add("persistent", "true")
}
ms := exampid + "message: "
for i := 1; i <= senv.Nmsgs(); i++ {
mse := ms + fmt.Sprintf("%d", i)
ll.Printf("%stag:%s connsess:%s main_sending mse:~%s~\n",
exampid, tag, conn.Session(),
mse)
e := conn.Send(sh, mse)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s main_on_connect error:%v",
exampid, tag, conn.Session(),
e.Error()) // Handle this ......
}
ll.Printf("%stag:%s connsess:%s main_send_complete mse:~%s~\n",
exampid, tag, conn.Session(),
mse)
time.Sleep(100 * time.Millisecond)
}
// *NOTE* application specific functionaltiy ends here!
// Standard example disconnect sequence
e = sngecomm.CommonDisconnect(n, conn, exampid, tag, ll)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s main_on_disconnect error:%v",
exampid, tag, conn.Session(),
e.Error()) // Handle this ......
}
ll.Printf("%stag:%s connsess:%s main_elapsed:%v\n",
exampid, tag, conn.Session(),
time.Now().Sub(st))
}
func ShowRunParms(exampid string) {
llu.Printf("%sHOST:%v\n", exampid, os.Getenv("STOMP_HOST"))
llu.Printf("%sPORT:%v\n", exampid, os.Getenv("STOMP_PORT"))
llu.Printf("%sPROTOCOL:%v\n", exampid, senv.Protocol())
llu.Printf("%sVHOST:%v\n", exampid, senv.Vhost())
llu.Printf("%sNQS:%v\n", exampid, Nqs())
llu.Printf("%sNMSGS:%v\n", exampid, senv.Nmsgs())
llu.Printf("%sSUBCHANCAP:%v\n", exampid, senv.SubChanCap())
llu.Printf("%sRECVFACT:%v\n", exampid, RecvFactor())
llu.Printf("%sSENDFACT:%v\n", exampid, SendFactor())
llu.Printf("%sRECVWAIT:%t\n", exampid, RecvWait())
llu.Printf("%sSENDWAIT:%t\n", exampid, SendWait())
llu.Printf("%sACKMODE:%v\n", exampid, AckMode())
}
/*
runSender sends all messages to a specified queue.
*/
func runSender(conn *stompngo.Connection, qns string) {
ltag := tag + "-runsender"
d := sngecomm.Dest() + "." + qns
id := stompngo.Uuid() // A unique sender id
ll.Printf("%stag:%s connsess:%s start id:%s dest:%s\n",
exampid, ltag, conn.Session(),
id, d)
wh := stompngo.Headers{"destination", d, "senderId", id,
"qnum", qns} // basic send Headers
if senv.Persistent() {
wh = wh.Add("persistent", "true")
}
tmr := time.NewTimer(100 * time.Hour)
nmsgs := senv.Nmsgs()
for mc := 1; mc <= nmsgs; mc++ {
sh := append(wh, "msgnum", fmt.Sprintf("%d", mc))
// Generate a message to send ...............
ll.Printf("%stag:%s connsess:%s send id:%s qns:%s mc:%d\n",
exampid, ltag, conn.Session(),
id, qns, mc)
e := conn.Send(sh, string(sngecomm.Partial()))
if e != nil {
ll.Fatalf("%stag:%s connsess:%s send_error qns:%v error:%v",
exampid, ltag, conn.Session(),
qns, e.Error()) // Handle this ......
}
if mc == nmsgs {
break
}
if sw {
dt := time.Duration(sngecomm.ValueBetween(min, max, sf))
ll.Printf("%stag:%s connsess:%s send_stagger dt:%v qns:%s mc:%d\n",
exampid, ltag, conn.Session(),
dt, qns, mc)
tmr.Reset(dt)
_ = <-tmr.C
runtime.Gosched()
}
}
ll.Printf("%stag:%s connsess:%s end id:%s dest:%s\n",
exampid, ltag, conn.Session(),
id, d)
//
wgs.Done()
}
/*
Start all sender go routines.
*/
func startSenders(nqs int) {
ltag := tag + "-startsenders"
ll.Printf("%stag:%s connsess:%s queue_count nqs:%v\n",
exampid, ltag, conn.Session(),
nqs)
mc := senv.Nmsgs() // message count
ll.Printf("%stag:%s connsess:%s message_count mc:%v\n",
exampid, ltag, conn.Session(),
mc)
for i := 1; i <= nqs; i++ { // all queues
wgs.Add(1)
go sender(i, mc)
}
wgs.Wait()
ll.Printf("%stag:%s connsess:%s ends nqs:%v mc:%v\n",
exampid, ltag, conn.Session(),
nqs, mc)
wga.Done()
}
func startReceivers(qn int) {
ltag := tag + "-startreceivers"
ll.Printf("%stag:%s connsess:%s starts qn:%d\n",
exampid, ltag, sngecomm.Lcs,
qn)
// Standard example connect sequence
n, conn, e := sngecomm.CommonConnect(exampid, ltag, ll)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s on_connect error:%v",
exampid, ltag, sngecomm.Lcs,
e.Error()) // Handle this ......
}
nmsgs := senv.Nmsgs() // get message count
ll.Printf("%stag:%s connsess:%s message_count nmsgs:%d qn:%d\n",
exampid, ltag, conn.Session(),
nmsgs, qn)
for i := 1; i <= qn; i++ { // all queues
wgr.Add(1)
go receiver(conn, i, nmsgs)
}
ll.Printf("%stag:%s connsess:%s starts_done\n",
exampid, ltag, conn.Session())
wgr.Wait()
// Standard example disconnect sequence
e = sngecomm.CommonDisconnect(n, conn, exampid, ltag, ll)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s on_disconnect error:%v",
exampid, ltag, conn.Session(),
e.Error()) // Handle this ......
}
sngecomm.ShowStats(exampid, ltag, conn)
wga.Done()
}
/*
runReceive receives all messages from a specified queue.
*/
func runReceive(conn *stompngo.Connection, q int, w *sync.WaitGroup) {
ltag := tag + "-runreceive"
qns := fmt.Sprintf("%d", q) // queue number
id := stompngo.Uuid() // A unique subscription ID
d := sngecomm.Dest() + "." + qns
ll.Printf("%stag:%s connsess:%s starts id:%s qns:%s d:%s\n",
exampid, ltag, conn.Session(),
id, qns, d)
// Subscribe (use common helper)
sc := sngecomm.HandleSubscribe(conn, d, id, sngecomm.AckMode())
ll.Printf("%stag:%s connsess:%s subscribe_done id:%s qns:%s d:%s\n",
exampid, ltag, conn.Session(),
id, qns, d)
//
tmr := time.NewTimer(100 * time.Hour)
pbc := sngecomm.Pbc() // Print byte count
nmsgs := senv.Nmsgs()
// Receive loop
var md stompngo.MessageData
for mc := 1; mc <= nmsgs; mc++ {
ll.Printf("%stag:%s connsess:%s chanchek id:%s qns:%s lensc:%d capsc:%d\n",
exampid, ltag, conn.Session(),
id, qns, len(sc), cap(sc))
select {
case md = <-sc:
case md = <-conn.MessageData:
// Frames RECEIPT or ERROR not expected here
ll.Fatalf("%stag:%s connsess:%s send_error qns:%v md:%v",
exampid, ltag, conn.Session(),
qns, md) // Handle this ......
}
if md.Error != nil {
ll.Fatalf("%stag:%s connsess:%s receive_error qns:%v error:%v\n",
exampid, ltag, conn.Session(),
qns, md.Error)
}
// Process the inbound message .................
ll.Printf("%stag:%s connsess:%s inbound id:%s qns:%s mc:%d\n",
exampid, ltag, conn.Session(),
id, qns, mc)
// Sanity check the message Command, and the queue and message numbers
mns := fmt.Sprintf("%d", mc) // string message number
if md.Message.Command != stompngo.MESSAGE {
ll.Fatalf("%stag:%s connsess:%s bad_frame qns:%s mc:%d md:%v\n",
exampid, ltag, conn.Session(),
qns, mc, md)
}
if !md.Message.Headers.ContainsKV("qnum", qns) || !md.Message.Headers.ContainsKV("msgnum", mns) {
ll.Fatalf("%stag:%s connsess:%s dirty_message qns:%v msgnum:%v md:%v",
exampid, tag, conn.Session(),
qns, mns, md) // Handle this ......
}
sl := len(md.Message.Body)
if pbc > 0 {
sl = pbc
if len(md.Message.Body) < sl {
sl = len(md.Message.Body)
}
}
ll.Printf("%stag:%s connsess:%s runReceive_recv_message id:%s body:%s qns:%s msgnum:%s\n",
exampid, ltag, conn.Session(),
id, string(md.Message.Body[0:sl]), qns,
md.Message.Headers.Value("msgnum"))
// Handle ACKs if needed
if sngecomm.AckMode() != "auto" {
ah := stompngo.Headers{}
sngecomm.HandleAck(conn, ah, id)
}
if mc == nmsgs {
break
}
if rw {
dt := time.Duration(sngecomm.ValueBetween(min, max, rf))
ll.Printf("%stag:%s connsess:%s recv_stagger dt:%v qns:%s mc:%d\n",
exampid, ltag, conn.Session(),
dt, qns, mc)
tmr.Reset(dt)
_ = <-tmr.C
runtime.Gosched()
}
}
// Unsubscribe
sngecomm.HandleUnsubscribe(conn, d, id)
ll.Printf("%stag:%s connsess:%s runRecieve_ends id:%s qns:%s\n",
exampid, ltag, conn.Session(),
id, qns)
w.Done()
}
// Connect to a STOMP broker, receive some messages, ACK them, and disconnect.
func main() {
st := time.Now()
// Standard example connect sequence
n, conn, e := sngecomm.CommonConnect(exampid, tag, ll)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s main_on_connect error:%v",
exampid, tag, sngecomm.Lcs,
e.Error()) // Handle this ......
}
pbc := sngecomm.Pbc() // Print byte count
// *NOTE* your application functionaltiy goes here!
// With Stomp, you must SUBSCRIBE to a destination in order to receive.
// Subscribe returns a channel of MessageData struct.
// Here we use a common utility routine to handle the differing subscribe
// requirements of each protocol level.
d := senv.Dest()
id := stompngo.Uuid()
sc := sngecomm.HandleSubscribe(conn, d, id, "client")
ll.Printf("%stag:%s connsess:%s main_subscribe_complete\n",
exampid, tag, conn.Session())
// Read data from the returned channel
var md stompngo.MessageData
for i := 1; i <= senv.Nmsgs(); i++ {
select {
case md = <-sc:
case md = <-conn.MessageData:
// Frames RECEIPT or ERROR not expected here
ll.Fatalf("%stag:%s connsess:%s main_channel_frame error:%v",
exampid, tag, conn.Session(),
e.Error()) // Handle this ......
}
ll.Printf("%stag:%s connsess:%s main_channel_read_complete\n",
exampid, tag, conn.Session())
// MessageData has two components:
// a) a Message struct
// b) an Error value. Check the error value as usual
if md.Error != nil {
ll.Fatalf("%stag:%s connsess:%s main_channel_read error:%v",
exampid, tag, conn.Session(),
e.Error()) // Handle this ......
}
//
ll.Printf("%stag:%s connsess:%s frame_type:%v\n",
exampid, tag, conn.Session(),
md.Message.Command)
if md.Message.Command != stompngo.MESSAGE {
ll.Fatalf("%stag:%s connsess:%s bad_frame frame:%v",
exampid, tag, conn.Session(),
md.Message.Command) // Handle this ......
}
wh := md.Message.Headers
for j := 0; j < len(wh)-1; j += 2 {
ll.Printf("%stag:%s connsess:%s header:%s:%s\n",
exampid, tag, conn.Session(),
wh[j], wh[j+1])
}
if pbc > 0 {
maxlen := pbc
if len(md.Message.Body) < maxlen {
maxlen = len(md.Message.Body)
}
ss := string(md.Message.Body[0:maxlen])
ll.Printf("%stag:%s connsess:%s message_payload body:%s\n",
exampid, tag, conn.Session(),
ss)
}
// ACK the message just received.
// Agiain we use a utility routine to handle the different requirements
// of the protocol versions.
sngecomm.HandleAck(conn, md.Message.Headers, id)
ll.Printf("%stag:%s connsess:%s ack_complete\n",
exampid, tag, conn.Session())
}
// It is polite to unsubscribe, although unnecessary if a disconnect follows.
// Again we use a utility routine to handle the different protocol level
// requirements.
sngecomm.HandleUnsubscribe(conn, d, id)
ll.Printf("%stag:%s connsess:%s stomp_unsubscribe_complete\n",
exampid, tag, conn.Session())
// Standard example disconnect sequence
e = sngecomm.CommonDisconnect(n, conn, exampid, tag, ll)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s disconnect error:%v",
exampid, tag, conn.Session(),
e.Error()) // Handle this ......
}
ll.Printf("%stag:%s connsess:%s main_elapsed:%v\n",
exampid, tag, conn.Session(),
time.Now().Sub(st))
}
// Connect to a STOMP broker, subscribe and receive some messages and disconnect.
func main() {
st := time.Now()
// Standard example connect sequence
n, conn, e := sngecomm.CommonConnect(exampid, tag, ll)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s main_on_connect error:%v",
exampid, tag, sngecomm.Lcs,
e.Error()) // Handle this ......
}
session = conn.Session()
conn.SetLogger(ll) // stompngo logging
pbc := sngecomm.Pbc() // Print byte count
d := senv.Dest() // Destination
id := stompngo.Uuid() // A unique name/id
nmsgs := senv.Nmsgs() // int number of messages to get
mns := fmt.Sprintf("%d", nmsgs) // string number of messages to get
am := sngecomm.AckMode() // ACK mode to use on SUBSCRIBE
nfa := true // Need "final" ACK (possiby reset below)
wh := stompngo.Headers{ // Starting SUBSCRIBE headers
stompngo.StompPlusDrainAfter,
mns} // Need a string here
// Sanity check ACK mode
if conn.Protocol() == stompngo.SPL_10 &&
am == stompngo.AckModeClientIndividual {
ll.Fatalf("%stag:%s connsess:%s invalid_ack_mode am:%v proto:%v\n",
exampid, tag, session,
am, conn.Protocol()) //
}
// Do not do final ACK if running ACKs are issued
if am == stompngo.AckModeClientIndividual ||
am == stompngo.AckModeAuto {
nfa = false
}
// Show run parameters
ll.Printf("%stag:%s connsess:%s run_parms\n\tpbc:%v\n\td:%v\n\tid:%v\n\tnmsgs:%v\n\tam:%v\n\tnfa:%v\n\twh:%v\n",
exampid, tag, session,
pbc, d, id, nmsgs, am, nfa, wh)
// Run SUBSCRIBE
sc := doSubscribe(conn, d, id, am, wh)
ll.Printf("%stag:%s connsess:%s stomp_subscribe_complete\n",
exampid, tag, session)
var md stompngo.MessageData // Message data from basic read
var lmd stompngo.MessageData // Possible save (copy) of received data
mc := 1 // Initial message number
// Loop for the requested number of messages
GetLoop:
for {
ll.Printf("%stag:%s connsess:%s start_of_read_loop mc:%v nmsgs:%v\n",
exampid, tag, session, mc, nmsgs)
mcs := fmt.Sprintf("%d", mc) // string number message count
// Get something from the stompngo read routine
select {
case md = <-sc:
case md = <-conn.MessageData:
//
if md.Message.Command == stompngo.RECEIPT {
ll.Printf("%stag:%s connsess:%s have_receipt md:%v\n",
exampid, tag, session,
md)
continue GetLoop
}
ll.Fatalf("%stag:%s connsess:%s ERROR_frame hdrs:%v body:%v\n",
exampid, tag, session,
md.Message.Headers, string(md.Message.Body)) // Handle this ......
}
// Save message data for possible use in the final ACK
if mc == nmsgs && nfa {
lmd = md // Save last message
}
// Basic loop logging
ll.Printf("%stag:%s connsess:%s channel_read_complete mns:%s mc:%d\n",
exampid, tag, session,
mns, mc)
ll.Printf("%stag:%s connsess:%s message_number:%v\n",
exampid, tag, session,
mc)
// Check if reader returned any error
if md.Error != nil {
ll.Fatalf("%stag:%s connsess:%s error_read error:%v",
exampid, tag, session,
md.Error) // Handle this ......
}
// Show frame type
ll.Printf("%stag:%s connsess:%s frame_type cmd:%s\n",
exampid, tag, session,
md.Message.Command)
// Pure sanity check: this should *never* happen based on logic
// above.
if md.Message.Command != stompngo.MESSAGE {
ll.Fatalf("%stag:%s connsess:%s error_frame_type md:%v",
exampid, tag, session,
md) // Handle this ......
}
// Show Message Headers
wh := md.Message.Headers
for j := 0; j < len(wh)-1; j += 2 {
ll.Printf("%stag:%s connsess:%s Header:%s:%s\n",
exampid, tag, session,
wh[j], wh[j+1])
}
// Show (part of) Message Body
if pbc > 0 {
maxlen := pbc
if len(md.Message.Body) < maxlen {
maxlen = len(md.Message.Body)
}
ss := string(md.Message.Body[0:maxlen])
ll.Printf("%stag:%s connsess:%s payload body:%s\n",
exampid, tag, session,
ss)
}
// Sanity check this message payload
wm := wlp + mcs // The left part plus the (string) meassage number]
bm := string(md.Message.Body)
if bm != wm {
ll.Fatalf("%stag:%s connsess:%s error_message_payload\n\tGot %s\n\tWant%s\n",
exampid, tag, session,
bm, wm) // Handle this ......
} else {
ll.Printf("%stag:%s connsess:%s matched_body_string\n%s\n%s\n",
exampid, tag, session,
bm, wm) // Handle this ......)
}
// Run individual ACK if required
if am == stompngo.AckModeClientIndividual {
wh := md.Message.Headers // Copy Headers
if ar { // ACK receipt wanted
wh = wh.Add(stompngo.HK_RECEIPT, "rwanted-"+mcs)
}
sngecomm.HandleAck(conn, wh, id)
ll.Printf("%stag:%s connsess:%s individual_ack_complete mc:%v headers:%v\n",
exampid, tag, session,
mc, md.Message.Headers)
}
// Check for end of loop condition
if mc == nmsgs {
break
}
// Increment loop/message counter
mc++
}
// Issue the final ACK if needed
if nfa {
wh := lmd.Message.Headers // Copy Headers
if ar { // ACK receipt wanted
wh = wh.Add(stompngo.HK_RECEIPT, "rwanted-fin")
}
sngecomm.HandleAck(conn, wh, id)
ll.Printf("%stag:%s connsess:%s final_ack_complete\n",
exampid, tag, session)
if ar {
getReceipt(conn)
}
}
// Unsubscribe (may be skipped if requested)
if unsub {
sngecomm.HandleUnsubscribe(conn, d, id)
ll.Printf("%stag:%s connsess:%s stomp_unsubscribe_complete\n",
exampid, tag, session)
} else {
ll.Printf("%stag:%s connsess:%s skipping_unsubscribe\n",
exampid, tag, session)
}
// Standard example disconnect sequence (may be skipped if requested)
// a) Closes the *stompngo.Connection
// b) Closes the net.Conn
if dodisc {
e = sngecomm.CommonDisconnect(n, conn, exampid, tag, ll)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s main_on_disconnect error:%v",
exampid, tag, session,
e.Error()) // Handle this ......
}
ll.Printf("%stag:%s connsess:%s disconnect_receipt:%v\n",
exampid, tag, session,
conn.DisconnectReceipt)
} else {
ll.Printf("%stag:%s connsess:%s skipping_disconnect\n",
exampid, tag, session)
}
// End of work logging, show elapsed time
ll.Printf("%stag:%s connsess:%s main_elapsed:%v\n",
exampid, tag, session,
time.Now().Sub(st))
}
func main() {
st := time.Now()
sngecomm.ShowRunParms(exampid)
ll.Printf("%stag:%s connsess:%s main_starts\n",
exampid, tag, sngecomm.Lcs)
ll.Printf("%stag:%s connsess:%s main_profiling pprof:%v\n",
exampid, tag, sngecomm.Lcs,
sngecomm.Pprof())
ll.Printf("%stag:%s connsess:%s main_current_GOMAXPROCS gmp:%v\n",
exampid, tag, sngecomm.Lcs,
runtime.GOMAXPROCS(-1))
if sngecomm.SetMAXPROCS() {
nc := runtime.NumCPU()
ll.Printf("%stag:%s connsess:%s main_current_num_cpus cncpu:%v\n",
exampid, tag, sngecomm.Lcs,
nc)
gmp := runtime.GOMAXPROCS(nc)
ll.Printf("%stag:%s connsess:%s main_previous_num_cpus pncpu:%v\n",
exampid, tag, sngecomm.Lcs,
gmp)
ll.Printf("%stag:%s connsess:%s main_current_GOMAXPROCS gmp:%v\n",
exampid, tag, sngecomm.Lcs,
runtime.GOMAXPROCS(-1))
}
//
sw = sngecomm.SendWait()
rw = sngecomm.RecvWait()
sf = sngecomm.SendFactor()
rf = sngecomm.RecvFactor()
ll.Printf("%stag:%s connsess:%s main_wait_sleep_factors sw:%v rw:%v sf:%v rf:%v\n",
exampid, tag, sngecomm.Lcs,
sw, rw, sf, rf)
//
numq := sngecomm.Nqs()
nmsgs = senv.Nmsgs() // message count
//
ll.Printf("%stag:%s connsess:%s main_starting_receivers\n",
exampid, tag, sngecomm.Lcs)
for q := 1; q <= numq; q++ {
wgr.Add(1)
go runReceiver(q)
}
ll.Printf("%stag:%s connsess:%s main_started_receivers\n",
exampid, tag, sngecomm.Lcs)
//
ll.Printf("%stag:%s connsess:%s main_starting_senders\n",
exampid, tag, sngecomm.Lcs)
for q := 1; q <= numq; q++ {
wgs.Add(1)
go runSender(q)
}
ll.Printf("%stag:%s connsess:%s main_started_senders\n",
exampid, tag, sngecomm.Lcs)
//
wgs.Wait()
ll.Printf("%stag:%s connsess:%s main_senders_complete\n",
exampid, tag, sngecomm.Lcs)
wgr.Wait()
ll.Printf("%stag:%s connsess:%s main_receivers_complete\n",
exampid, tag, sngecomm.Lcs)
//
// The end
ll.Printf("%stag:%s connsess:%s main_elapsed:%v\n",
exampid, tag, sngecomm.Lcs,
time.Now().Sub(st))
}
// We 'stagger' between each message send and message receive for a random
// amount of time.
// Vary these for experimental purposes. YMMV.
max int64 = 1e9 // Max stagger time (nanoseconds)
min int64 = max / 10 // Min stagger time (nanoseconds)
// Wait flags
sw = true
rw = true
// Sleep multipliers
sf float64 = 1.0
rf float64 = 1.0
// Number of messages
nmsgs = senv.Nmsgs()
ll = log.New(os.Stdout, "EMSMR ", log.Ldate|log.Lmicroseconds|log.Lshortfile)
tag = "manyconn"
)
func sendMessages(conn *stompngo.Connection, qnum int, nc net.Conn) {
ltag := tag + "-sendmessages"
qns := fmt.Sprintf("%d", qnum) // queue number
d := sngecomm.Dest() + "." + qns
ll.Printf("%stag:%s connsess:%s start d:%s qnum:%d\n",
exampid, ltag, conn.Session(),
d, qnum)
wh := stompngo.Headers{"destination", d,