func workStealer(control chan int) {
fmt.Printf("workStealer lanched, client=%s\n", core.Self.Id)
defer fmt.Printf("workStealer exiting...\n")
retry := 0
for {
if core.Service == "proxy" {
<-core.ProxyWorkChan
}
wu, err := CheckoutWorkunitRemote()
if err != nil {
if err.Error() == e.QueueEmpty || err.Error() == e.NoEligibleWorkunitFound {
//normal, do nothing
} else if err.Error() == e.ClientNotFound {
//server may be restarted, waiting for the hearbeater goroutine to try re-register
ReRegisterWithSelf(conf.SERVER_URL)
} else if err.Error() == e.ClientSuspended {
fmt.Printf("client suspended, waiting for repair or resume request...\n")
//to-do: send out email notice that this client has problem and been suspended
time.Sleep(2 * time.Minute)
} else {
//something is wrong, server may be down
fmt.Printf("error in checking out workunits: %v\n", err)
retry += 1
}
if retry == 3 {
os.Exit(1)
}
if core.Service != "proxy" { //proxy: event driven, client: timer driven
time.Sleep(10 * time.Second)
}
continue
} else {
retry = 0
}
logger.Debug(2, "workStealer: checked out a workunit: id="+wu.Id)
//log event about work checktout (WC)
logger.Event(event.WORK_CHECKOUT, "workid="+wu.Id)
core.Self.Total_checkout += 1
core.Self.Current_work[wu.Id] = true
workmap[wu.Id] = ID_WORKSTEALER
//hand the work to the next step handler: dataMover
workstat := core.NewWorkPerf(wu.Id)
workstat.Checkout = time.Now().Unix()
rawWork := &mediumwork{
workunit: wu,
perfstat: workstat,
}
fromStealer <- rawWork
//if worker overlap is inhibited, wait until deliverer finishes processing the workunit
if conf.WORKER_OVERLAP == false && core.Service != "proxy" {
chanPermit <- true
}
}
control <- ID_WORKSTEALER //we are ending
}
func workStealer(control chan int) {
//fmt.Printf("workStealer launched, client=%s\n", core.Self.Id)
logger.Debug(0, fmt.Sprintf("workStealer launched, client=%s\n", core.Self.Id))
defer fmt.Printf("workStealer exiting...\n")
retry := 0
for {
if core.Service == "proxy" {
<-core.ProxyWorkChan
}
wu, err := CheckoutWorkunitRemote()
if err != nil {
if err.Error() == e.QueueEmpty || err.Error() == e.QueueSuspend || err.Error() == e.NoEligibleWorkunitFound {
//normal, do nothing
logger.Debug(3, fmt.Sprintf("client %s recieved status %s from server %s", core.Self.Id, err.Error(), conf.SERVER_URL))
} else if err.Error() == e.ClientNotFound {
//server may be restarted, waiting for the hearbeater goroutine to try re-register
ReRegisterWithSelf(conf.SERVER_URL)
} else if err.Error() == e.ClientSuspended {
logger.Error("client suspended, waiting for repair or resume request...")
//TODO: send out email notice that this client has problem and been suspended
time.Sleep(2 * time.Minute)
} else if err.Error() == e.ClientDeleted {
fmt.Printf("client deleted, exiting...\n")
os.Exit(1) // TODO is there a better way of exiting ? E.g. in regard of the logger who wants to flush....
} else {
//something is wrong, server may be down
logger.Error(fmt.Sprintf("error in checking out workunit: %s, retry=%d", err.Error(), retry))
retry += 1
}
//if retry == 12 {
// fmt.Printf("failed to checkout workunits for 12 times, exiting...\n")
// logger.Error("failed to checkout workunits for 12 times, exiting...")
// os.Exit(1) // TODO fix !
//}
if core.Service != "proxy" { //proxy: event driven, client: timer driven
if retry <= 10 {
time.Sleep(10 * time.Second)
} else {
time.Sleep(30 * time.Second)
}
}
continue
} else {
retry = 0
}
logger.Debug(1, "workStealer: checked out workunit, id="+wu.Id)
//log event about work checktout (WC)
logger.Event(event.WORK_CHECKOUT, "workid="+wu.Id)
core.Self.Increment_total_checkout()
core.Self.Current_work_add(wu.Id)
workmap[wu.Id] = ID_WORKSTEALER
//hand the work to the next step handler: dataMover
workstat := core.NewWorkPerf(wu.Id)
workstat.Checkout = time.Now().Unix()
rawWork := &mediumwork{
workunit: wu,
perfstat: workstat,
}
fromStealer <- rawWork // sends to dataMover
//if worker overlap is inhibited, wait until deliverer finishes processing the workunit
if conf.WORKER_OVERLAP == false && core.Service != "proxy" {
chanPermit <- true
}
}
control <- ID_WORKSTEALER //we are ending
}