func main() {
runtime.GOMAXPROCS(runtime.NumCPU())
// start up an http server, just to serve up expvars
go http.ListenAndServe(":9876", nil)
var config workload.Config
workload.ReadConfig(&config)
admin := api.SyncGatewayClient{}
admin.Init(config.Hostname, config.Database, config.Port, config.AdminPort, config.LogRequests)
if !admin.Valid() {
log.Fatalf("unable to connect to sync_gateway, check the hostname and database")
}
pendingUsers := make(chan *workload.User)
users := make([]*workload.User, config.NumPullers+config.NumPushers)
// start a routine to place pending users into array
go func() {
for pendingUser := range pendingUsers {
// users = append(users, pendingUser)
users[pendingUser.SeqId-config.UserOffset] = pendingUser
}
}()
rampUpDelay := config.RampUpIntervalMs / (config.NumPullers + config.NumPushers)
// use a fixed number of workers to create the users/sessions
userIterator := workload.UserIterator(config.NumPullers, config.NumPushers, config.UserOffset, config.ChannelActiveUsers, config.ChannelConcurrentUsers, config.MinUserOffTimeMs, config.MaxUserOffTimeMs, rampUpDelay, config.RunTimeMs)
adminWg := sync.WaitGroup{}
worker := func() {
defer adminWg.Done()
for user := range userIterator {
createSession(&admin, user, config)
pendingUsers <- user
}
}
for i := 0; i < 16; i++ {
adminWg.Add(1)
go worker()
}
// wait for all the workers to finish
adminWg.Wait()
// close the pending users channel to free that routine
close(pendingUsers)
numChannels := (config.NumPullers + config.NumPushers) / config.ChannelActiveUsers
channelRampUpDelayMs := time.Duration(config.RampUpIntervalMs/numChannels) * time.Millisecond
wg := sync.WaitGroup{}
channel := ""
for _, user := range users {
nextChannel := user.Channel
if channel != nextChannel {
if channel != "" {
time.Sleep(channelRampUpDelayMs)
}
channel = nextChannel
}
wg := sync.WaitGroup{}
go runUser(user, config, &wg)
wg.Add(1)
}
if config.RunTimeMs > 0 {
time.Sleep(time.Duration(config.RunTimeMs-config.RampUpIntervalMs) * time.Millisecond)
log.Println("Shutting down clients")
} else {
wg.Wait()
}
}
