func runSender(qnum int) {
ltag := tag + "-runsender"
ll.Printf("%stag:%s connsess:%s start qnum:%d\n",
exampid, ltag, sngecomm.Lcs,
qnum)
// Standard example connect sequence
n, conn, e := sngecomm.CommonConnect(exampid, ltag, ll)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s error:%s\n",
exampid, ltag, sngecomm.Lcs,
e.Error()) // Handle this ......
}
//
sendMessages(conn, qnum, n)
ll.Printf("%stag:%s connsess:%s sends_complete qnum:%d\n",
exampid, ltag, conn.Session(),
qnum)
// Standard example disconnect sequence
e = sngecomm.CommonDisconnect(n, conn, exampid, ltag, ll)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s error:%s\n",
exampid, ltag, conn.Session(),
e.Error()) // Handle this ......
}
sngecomm.ShowStats(exampid, "send_"+fmt.Sprintf("%d", qnum), conn)
wgs.Done()
}
func runReceiver(qnum int) {
ltag := tag + "-runreceiver"
ll.Printf("%stag:%s connsess:%s start qnum:%d\n",
exampid, ltag, sngecomm.Lcs,
qnum)
// Standard example connect sequence
n, conn, e := sngecomm.CommonConnect(exampid, ltag, ll)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s error:%s\n",
exampid, ltag, sngecomm.Lcs,
e.Error()) // Handle this ......
}
//
conn.SetSubChanCap(senv.SubChanCap()) // Experiment with this value, YMMV
// Receives
receiveMessages(conn, qnum, n)
ll.Printf("%stag:%s connsess:%s receives_complete qnum:%d\n",
exampid, ltag, conn.Session(),
qnum)
// Standard example disconnect sequence
e = sngecomm.CommonDisconnect(n, conn, exampid, ltag, ll)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s error:%s\n",
exampid, ltag, conn.Session(),
e.Error()) // Handle this ......
}
sngecomm.ShowStats(exampid, "recv_"+fmt.Sprintf("%d", qnum), conn)
wgr.Done()
}
/*
openSconn opens a stompngo Connection.
*/
func openSconn() (net.Conn, *stompngo.Connection) {
ltag := tag + "-opensconn"
// Standard example connect sequence
n, conn, e := sngecomm.CommonConnect(exampid, ltag, ll)
if e != nil {
ll.Fatalf("%stag:%s consess:%s connect_error error:%s\n",
exampid, ltag, sngecomm.Lcs,
e.Error()) // Handle this ......
}
return n, conn
}
// 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))
}
// Connect to a STOMP broker, send some messages and disconnect.
func main() {
st := time.Now()
// Standard example connect sequence
// Use AMQ port here
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 ......
}
// Suppress content length here, so JMS will treat this as a 'text' message.
sh := stompngo.Headers{"destination", "jms.queue.exampleQueue"}
if os.Getenv("STOMP_NOSCL") != "true" {
sh = sh.Add("suppress-content-length", "true")
}
if senv.Persistent() {
sh = sh.Add("persistent", "true")
}
ms := exampid + " message: "
for i := 1; i <= nmsgs; i++ {
mse := ms + fmt.Sprintf("%d", i)
e := conn.Send(sh, mse)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s send_error error:%v\n",
exampid, tag, conn.Session(),
e.Error()) // Handle this ......
}
ll.Printf("%stag:%s connsess:%s send_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 main_disconnect error:%v",
exampid, tag, sngecomm.Lcs,
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()
//******************
nqs := sngecomm.Nqs()
for qn := 1; qn <= nqs; qn++ {
runNextQueue(qn, conn)
}
//******************
ll.Printf("%stag:%s connsess:%s start_drain_receives\n",
exampid, tag, session)
for _, v := range qcb {
_ = <-v
}
ll.Printf("%stag:%s connsess:%s end_drain_receives\n",
exampid, tag, session)
// Standard example disconnect sequence
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)
}
ll.Printf("%stag:%s connsess:%s main_elapsed:%v\n",
exampid, tag, session,
time.Now().Sub(st))
}
// Connect to a STOMP broker, receive and ackMode some messages.
// Disconnect never occurs, kill via ^C.
func main() {
// Standard example connect sequence
_, 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 ......
}
for i := 1; i <= ns; i++ {
go recv(conn, i)
}
ll.Printf("%stag:%s connsess:%s receivers_started\n",
exampid, tag, conn.Session())
select {} // This will never complete, use ^C to cancel
}
// Connect to a STOMP broker and disconnect.
func main() {
st := time.Now()
// Standard example connect sequence
n, conn, e := sngecomm.CommonConnect(exampid, tag, ll)
if e != nil {
if conn != nil {
ll.Printf("%stag%s connsess:%s main_on_connect error Connect Response headers:%v body%s\n",
exampid, tag, conn.Session(), conn.ConnectResponse.Headers,
string(conn.ConnectResponse.Body))
}
ll.Fatalf("%stag:%s connsess:%s main_on_connect error:%v",
exampid, tag, sngecomm.Lcs,
e.Error()) // Handle this ......
}
ll.Printf("%stag%s connsess:%s Connect Response headers:%v body%s\n",
exampid, tag, conn.Session(), conn.ConnectResponse.Headers,
string(conn.ConnectResponse.Body))
// *NOTE* application specific functionaltiy starts here!
// For you to add.
// *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 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()
}
// 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, receive some messages and disconnect.
func main() {
st := time.Now()
// Standard example connect sequence
// Use AMQ port here
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
// Setup Headers ...
id := stompngo.Uuid() // Use package convenience function for unique ID
d := "jms.queue.exampleQueue"
sc := sngecomm.HandleSubscribe(conn, d, id, "auto")
ll.Printf("%stag:%s connsess:%s stomp_subscribe_complete\n",
exampid, tag, conn.Session())
//
var md stompngo.MessageData
// Read data from the returned channel
for i := 1; i <= nmsgs; i++ {
select {
case md = <-sc:
case md = <-conn.MessageData:
// Frames RECEIPT or ERROR not expected here
ll.Fatalf("%stag:%s connsess:%s bad_frame error:%v",
exampid, tag, conn.Session(),
e.Error()) // Handle this ......
}
ll.Printf("%stag:%s connsess:%s 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 error_read error:%v",
exampid, tag, conn.Session(),
e.Error()) // Handle this ......
}
ll.Printf("%stag:%s connsess:%s frame_type cmd:%s\n",
exampid, tag, conn.Session(),
md.Message.Command)
if md.Message.Command != stompngo.MESSAGE {
ll.Fatalf("%stag:%s connsess:%s error_frame_type error:%v",
exampid, tag, conn.Session(),
e.Error()) // 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 payload body:%s\n",
exampid, tag, conn.Session(),
ss)
}
}
//
sngecomm.HandleUnsubscribe(conn, d, id)
ll.Printf("%stag:%s connsess:%s 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 main_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))
}
// A forever reader.
func main() {
st := time.Now()
sngecomm.ShowRunParms(exampid)
// Standard example connect sequence
var e error
n, conn, e = sngecomm.CommonConnect(exampid, tag, ll)
if e != nil {
if conn != nil {
ll.Printf("%stag:%s connsess:%s Connect Response headers:%v body%s\n",
exampid, tag, conn.Session(), conn.ConnectResponse.Headers,
string(conn.ConnectResponse.Body))
}
ll.Fatalf("%stag:%s connsess:%s main_on_connect error:%v",
exampid, tag, sngecomm.Lcs,
e.Error()) // Handle this ......
}
//**
qn := 1
ltag := tag + "-receiver"
id := stompngo.Uuid() // A unique subscription ID
d := sngecomm.Dest()
ll.Printf("%stag:%s connsess:%s queue_info id:%v d:%v qnum:%v\n",
exampid, ltag, conn.Session(),
id, d, qn)
// Subscribe
sc := sngecomm.HandleSubscribe(conn, d, id, sngecomm.AckMode())
ll.Printf("%stag:%s connsess:%s subscribe_complete id:%v d:%v qnum:%v\n",
exampid, ltag, conn.Session(),
id, d, qn)
//
var md stompngo.MessageData
// Receive loop
mc := 1
for {
ll.Println("========================== ", "Expecting Message:", mc,
"==========================")
select {
case md = <-sc:
case md = <-conn.MessageData:
// A RECEIPT or ERROR frame is unexpected here
ll.Fatalf("%stag:%s connsess:%s bad_frame qnum:%v headers:%v body:%s",
exampid, tag, conn.Session(),
qn, md.Message.Headers, md.Message.Body) // Handle this ......
}
if md.Error != nil {
ll.Fatalf("%stag:%s connsess:%s recv_error qnum:%v error:%v",
exampid, tag, conn.Session(),
qn, md.Error) // Handle this ......
}
ll.Printf("%stag:%s connsess:%s next_frame mc:%v command:%v headers:%v body:%v\n",
exampid, tag, conn.Session(),
mc, md.Message.Command, md.Message.Headers, string(md.Message.Body)) // Handle this ......
mc++
}
//**
// 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 ......
}
sngecomm.ShowStats(exampid, tag, conn)
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() {
// Make sure that the queue used by this example do not exist, or are
// empty.
// Following is a lengthy piece of code. Read it striaght from top
// to bottom. There is zero complex logic here.
// What this code will do:
// Phase 1:
// - Connect to a broker
// - Verify a connection spec level
// - Send a single message to the specified queue on that broker
// - Disconnect from that broker
//
// Phase 2:
// - Reconnect to the same broker
// - Subscribe to the specified queue, using "ack:client-individual"
// - Receive a single message
// - Send an ACK, asking for a receipt
//**************************************************************************
// - Receive a RECEIPT // The point of this exercise.
// - Show data from the RECEIPT and verify it // The point of this exercise.
//**************************************************************************
// - Disconnect from the broker
// Start
st := time.Now()
// **************************************** Phase 1
// Set up the connection.
// 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 ......
}
// ****************************************
// App logic here .....
d := sngecomm.Dest()
ll.Printf("%stag:%s connsess:%s destination:%v\n",
exampid, tag, conn.Session(),
d)
// ****************************************
// Send exactly one message.
sh := stompngo.Headers{"destination", sngecomm.Dest()}
if senv.Persistent() {
sh = sh.Add("persistent", "true")
}
m := exampid + " message: "
t := m + "1"
ll.Printf("%stag:%s connsess:%s sending_now body:%v\n",
exampid, tag, conn.Session(),
t)
e = conn.Send(sh, t)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s main_bad_send error:%v",
exampid, tag, conn.Session(),
e.Error()) // Handle this ......
}
ll.Printf("%stag:%s connsess:%s send_complete body:%v\n",
exampid, tag, conn.Session(),
t)
// ****************************************
// Disconnect from the Stomp server
// Standard example disconnect sequence
e = sngecomm.CommonDisconnect(n, conn, exampid, tag, ll)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s main_disconnect error:%v",
exampid, tag, conn.Session(),
e.Error()) // Handle this ......
}
// **************************************** Phase 2
// 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 ......
}
// ****************************************
// Subscribe here
id := stompngo.Uuid()
// Get the "subscribe channel"
sc := sngecomm.HandleSubscribe(conn, d, id, "client-individual")
ll.Printf("%stag:%s connsess:%s stomp_subscribe_complete\n",
exampid, tag, conn.Session())
// Get data from the broker
var md stompngo.MessageData // A message data instance
select {
case md = <-sc:
case md = <-conn.MessageData:
// This would be contain an ERROR or RECEIPT frame. Both are unexpected
// in this example.
ll.Fatalf("%stag:%s connsess:%s bad_frame md:%v",
exampid, tag, conn.Session(),
md) // Handle this ......
}
ll.Printf("%stag:%s connsess:%s 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 message_error md:%v",
exampid, tag, conn.Session(),
md.Error) // Handle this ......
}
ll.Printf("%stag:%s connsess:%s read_message_COMMAND command:%s\n",
exampid, tag, conn.Session(),
md.Message.Command)
ll.Printf("%stag:%s connsess:%s read_message_HEADERS headers:%s\n",
exampid, tag, conn.Session(),
md.Message.Headers)
ll.Printf("%stag:%s connsess:%s read_message_BODY body:%s\n",
exampid, tag, conn.Session(),
string(md.Message.Body))
// Here we need to send an ACK. Required Headers are different between
// a 1.1 and a 1.2 connection level.
var ah stompngo.Headers
if conn.Protocol() == stompngo.SPL_11 { // 1.1
ah = ah.Add("subscription", md.Message.Headers.Value("subscription"))
ah = ah.Add("message-id", md.Message.Headers.Value("message-id"))
} else { // 1.2
ah = ah.Add("id", md.Message.Headers.Value("ack"))
}
// We are also going to ask for a RECEIPT for the ACK
rid := "receipt-001"
ah = ah.Add("receipt", rid)
//
ll.Printf("%stag:%s connsess:%s ACK_receipt_headers headers:%v\n",
exampid, tag, conn.Session(),
ah)
e = conn.Ack(ah)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s ack_error error:%v",
exampid, tag, conn.Session(),
e.Error()) // Handle this ......
}
// ****************************************
// Finally get the RECEIPT. Where is it? It is *not* on the "subscribe
// channel". It is on the connection level MessageData channel. Why?
// Because the broker does *not* include a "subscription" header in
// RECEIPT frames..
// ****************************************
// ***IMPORTANT***
// ***NOTE*** which channel this RECEIPT MessageData comes in on.
ll.Printf("%stag:%s connsess:%s start_receipt_read\n",
exampid, tag, conn.Session())
var rd stompngo.MessageData
select {
case rd = <-sc:
// This would contain a MESSAGE frame. It is unexpected here
// in this example.
ll.Fatalf("%stag:%s connsess:%s bad_frame_channel rd:%v\n",
exampid, tag, conn.Session(),
rd) // Handle this ......
case rd = <-conn.MessageData: // RECEIPT frame s/b in the MessageData
// Step 1 of Verify
if rd.Message.Command != stompngo.RECEIPT {
ll.Fatalf("%stag:%s connsess:%s bad_frame_command rd:%v\n",
exampid, tag, conn.Session(),
rd) // Handle this ......
}
}
ll.Printf("%stag:%s connsess:%s end_receipt_read\n",
exampid, tag, conn.Session())
// ****************************************
// Show details about the RECEIPT MessageData struct
ll.Printf("%stag:%s connsess:%s receipt_COMMAND command:%s\n",
exampid, tag, conn.Session(),
rd.Message.Command)
ll.Printf("%stag:%s connsess:%s receipt_HEADERS headers:%v\n",
exampid, tag, conn.Session(),
rd.Message.Headers)
ll.Printf("%stag:%s connsess:%s receipt_BODY body:%s\n",
exampid, tag, conn.Session(),
string(rd.Message.Body))
// Step 2 of Verify
// Verify that the receipt has the id we asked for
if rd.Message.Headers.Value("receipt-id") != rid {
ll.Fatalf("%stag:%s connsess:%s bad_receipt_id wanted:%v got:%v\n",
exampid, tag, conn.Session(),
rid, rd.Message.Headers.Value("receipt-id")) // Handle this ......
}
ll.Printf("%stag:%s connsess:%s receipt_id_verified rid:%s\n",
exampid, tag, conn.Session(),
rid)
// ****************************************
// Disconnect from the Stomp server
// Standard example disconnect sequence
e = sngecomm.CommonDisconnect(n, conn, exampid, tag, ll)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s main_disconnect error:%v",
exampid, tag, sngecomm.Lcs,
e.Error()) // Handle this ......
}
ll.Printf("%stag:%s connsess:%s main_elapsed:%v\n",
exampid, tag, conn.Session(),
time.Now().Sub(st))
}
func main() {
st := time.Now()
// ****************************************
// Set up the connection.
// 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 ......
}
// ****************************************
// App logic here .....
// Send exactly one message. Ask for a receipt.
d := sngecomm.Dest()
ll.Printf("%stag:%s connsess:%s destination:%v\n",
exampid, tag, conn.Session(),
d)
rid := "recipt-002" // The receipt ID
sh := stompngo.Headers{"destination", d,
"receipt", rid} // send headers
if senv.Persistent() {
sh = sh.Add("persistent", "true")
}
ms := exampid + " message: "
t := ms + rid
ll.Printf("%stag:%s connsess:%s sending_now body:%v\n",
exampid, tag, conn.Session(),
t)
e = conn.Send(sh, t)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s main_bad_send error:%v",
exampid, tag, conn.Session(),
e.Error()) // Handle this ......
}
ll.Printf("%stag:%s connsess:%s send_complete body:%v\n",
exampid, tag, conn.Session(),
t)
// Look for the receipt
ll.Printf("%stag:%s connsess:%s start_receipt_read\n",
exampid, tag, conn.Session())
rd := <-conn.MessageData // The RECEIPT frame should be on this channel
if rd.Message.Command != stompngo.RECEIPT {
ll.Fatalf("%stag:%s connsess:%s bad_frame_command rd:%v\n",
exampid, tag, conn.Session(),
rd) // Handle this ......
}
ll.Printf("%stag:%s connsess:%s end_receipt_read\n",
exampid, tag, conn.Session())
// ****************************************
// Show details about the RECEIPT MessageData struct
ll.Printf("%stag:%s connsess:%s receipt_COMMAND command:%s\n",
exampid, tag, conn.Session(),
rd.Message.Command)
ll.Printf("%stag:%s connsess:%s receipt_HEADERS headers:%v\n",
exampid, tag, conn.Session(),
rd.Message.Headers)
ll.Printf("%stag:%s connsess:%s receipt_BODY body:%s\n",
exampid, tag, conn.Session(),
string(rd.Message.Body))
// Step 2 of Verify
// Verify that the receipt has the id we asked for
if rd.Message.Headers.Value("receipt-id") != rid {
ll.Fatalf("%stag:%s connsess:%s bad_receipt_id wanted:%v got:%v\n",
exampid, tag, conn.Session(),
rid, rd.Message.Headers.Value("receipt-id")) // Handle this ......
}
ll.Printf("%stag:%s connsess:%s receipt_id_verified rid:%s\n",
exampid, tag, conn.Session(),
rid)
e = sngecomm.CommonDisconnect(n, conn, exampid, tag, ll)
if e != nil {
ll.Fatalf("%stag:%s connsess:%s main_disconnect error:%v",
exampid, tag, sngecomm.Lcs,
e.Error()) // Handle this ......
}
ll.Printf("%stag:%s connsess:%s main_elapsed:%v\n",
exampid, tag, conn.Session(),
time.Now().Sub(st))
}
// Show a number of writers and readers operating concurrently from unique
// destinations.
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))
}
// Wait flags
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)
// Number of queues
nqs := sngecomm.Nqs()
// Standard example connect sequence
var e error
n, conn, e = sngecomm.CommonConnect(exampid, tag, ll)
if e != nil {
if conn != nil {
ll.Printf("%stag:%s connsess:%s Connect Response headers:%v body%s\n",
exampid, tag, conn.Session(), conn.ConnectResponse.Headers,
string(conn.ConnectResponse.Body))
}
ll.Fatalf("%stag:%s connsess:%s main_on_connect error:%v",
exampid, tag, sngecomm.Lcs,
e.Error()) // Handle this ......
}
// Many receivers running under the same connection can cause
// (wire read) performance issues. This is *very* dependent on the broker
// being used, specifically the broker's algorithm for putting messages on
// the wire.
// To alleviate those issues, this strategy insures that messages are
// received from the wire as soon as possible. Those messages are then
// buffered internally for (possibly later) application processing. In
// this example, buffering occurs in the stompngo package.
conn.SetSubChanCap(senv.SubChanCap()) // Experiment with this value, YMMV
// Run everything
wga.Add(2)
go startReceivers(nqs)
go startSenders(nqs)
wga.Wait()
// 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 ......
}
sngecomm.ShowStats(exampid, tag, conn)
ll.Printf("%stag:%s connsess:%s main_elapsed:%v\n",
exampid, tag, conn.Session(),
time.Now().Sub(st))
}