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()
}
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())
}
// 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))
}