conndisc/conndisc.go

   1 //
   2 // Copyright © 2013-2018 Guy M. Allard
   3 //
   4 // Licensed under the Apache License, Version 2.0 (the "License");
   5 // you may not use this file except in compliance with the License.
   6 // You may obtain a copy of the License at
   7 //
   8 //     http://www.apache.org/licenses/LICENSE-2.0
   9 //
  10 // Unless required by applicable law or agreed to in writing, software
  11 // distributed under the License is distributed on an "AS IS" BASIS,
  12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 // See the License for the specific language governing permissions and
  14 // limitations under the License.
  15 //
  16
  17 /*
  18 Connect and Disconnect from a STOMP broker using TCP.
  19
  20         Examples:
  21
  22                 # Connect to a broker with all defaults:
  23                 # Host is "localhost"
  24                 # Port is 61613
  25                 # Login is "guest"
  26                 # Passcode is "guest
  27                 # Virtual Host is "localhost"
  28                 # Protocol is 1.1
  29                 go run conndisc.go
  30
  31                 # Connect to a broker using STOMP protocol level 1.0:
  32                 STOMP_PROTOCOL=1.0 go run conndisc.go
  33
  34                 # Connect to a broker using a custom host and port:
  35                 STOMP_HOST=tjjackson STOMP_PORT=62613 go run conndisc.go
  36
  37                 # Connect to a broker using a custom port and virtual host:
  38                 STOMP_PORT=41613 STOMP_VHOST="/" go run conndisc.go
  39
  40                 # Connect to a broker using a custom login and passcode:
  41                 STOMP_LOGIN="userid" STOMP_PASSCODE="t0ps3cr3t" go run conndisc.go
  42
  43 */
  44 package main
  45
  46 import (
  47         "log"
  48         "os"
  49         "time"
  50         // sngecomm methods are used specifically for these example clients.
  51         "github.com/gmallard/stompngo_examples/sngecomm"
  52 )
  53
  54 var (
  55         exampid = "conndisc: "
  56         ll      = log.New(os.Stdout, "ECNDS ", log.Ldate|log.Lmicroseconds|log.Lshortfile)
  57         tag     = "condiscmain"
  58 )
  59
  60 // Connect to a STOMP broker and disconnect.
  61 func main() {
  62
  63         st := time.Now()
  64
  65         // Standard example connect sequence
  66         n, conn, e := sngecomm.CommonConnect(exampid, tag, ll)
  67         if e != nil {
  68                 ll.Printf("%stag%s main_on_connect error basic:\nerror:%v\nconn:%v\n",
  69                         exampid, tag, e.Error(), conn)
  70                 if conn != nil && conn.ConnectResponse != nil {
  71                         ll.Printf("%stag%s connsess:%s main_on_connect error Connect Response headers:%v body%s\n",
  72                                 exampid, tag, conn.Session(), conn.ConnectResponse.Headers,
  73                                 string(conn.ConnectResponse.Body))
  74                 }
  75                 ll.Fatalf("%stag:%s connsess:%s main_on_connect FATAL error:%v",
  76                         exampid, tag, sngecomm.Lcs,
  77                         e.Error()) // Handle this ......
  78         }
  79
  80         ll.Printf("%stag%s connsess:%s Connect Response headers:%v body%s\n",
  81                 exampid, tag, conn.Session(), conn.ConnectResponse.Headers,
  82                 string(conn.ConnectResponse.Body))
  83
  84         // *NOTE* application specific functionaltiy starts here!
  85         // For you to add.
  86         // *NOTE* application specific functionaltiy ends here!
  87
  88         // Standard example disconnect sequence
  89         e = sngecomm.CommonDisconnect(n, conn, exampid, tag, ll)
  90         if e != nil {
  91                 ll.Fatalf("%stag:%s connsess:%s main_on_disconnect error:%v",
  92                         exampid, tag, conn.Session(),
  93                         e.Error()) // Handle this ......
  94         }
  95
  96         ll.Printf("%stag:%s connsess:%s main_elapsed:%v\n",
  97                 exampid, tag, conn.Session(),
  98                 time.Now().Sub(st))
  99
 100 }