func acquire(i int, s sync.Sync) {
l, err := s.Lock("alock")
if err != nil {
fmt.Printf("[lock:%d] err acquiring lock interface %v\n", i, err)
return
}
fmt.Printf("[lock:%d] attempting to acquire lock\n", i)
if err := l.Acquire(); err != nil {
fmt.Printf("[lock:%d] err acquiring lock %v\n", i, err)
return
}
fmt.Printf("[lock:%d] acquired lock!\n", i)
time.Sleep(time.Second)
fmt.Printf("[lock:%d] unlocking now\n", i)
if err := l.Release(); err != nil {
fmt.Printf("[lock:%d] err releasing lock %v\n", i, err)
}
fmt.Printf("[lock:%d] unlocked\n", i)
}
func leader(i int, s sync.Sync) {
// Get a leader interface
l, err := s.Leader("king")
if err != nil {
fmt.Printf("[leader:%d] err acquiring leader interface %v\n", i, err)
return
}
leader, err := l.Leader()
if err != nil {
fmt.Printf("[leader:%d] err getting current leader %v\n", i, err)
leaderStatus(i, l, "attempting to elect self")
} else {
leaderStatus(i, l, fmt.Sprintf("attempting to elect self. current leader %v", leader))
}
// Attempt to elect self
throne, err := l.Elect()
if err != nil {
fmt.Printf("[leader:%d] err electing self %v\n", i, err)
return
}
leaderStatus(i, l, "elected as leader")
j := 0
revoked, err := throne.Revoked()
if err != nil {
fmt.Printf("[leader:%d] throne already revoked, gnarly %v\n", i, err)
}
loop:
for {
select {
// Check if we've been revoked
case <-revoked:
leaderStatus(i, l, "leadership revoked")
return
default:
leaderStatus(i, l, "I'm leading son")
time.Sleep(time.Second)
}
if j >= 3 {
break loop
}
j++
}
leader, err = l.Leader()
if err != nil {
fmt.Printf("[leader:%d] err getting current leader %v\n", i, err)
} else {
leaderStatus(i, l, fmt.Sprintf("current leader %v", leader))
}
leaderStatus(i, l, "resigning now")
// Resign leadership status
if err := throne.Resign(); err != nil {
leaderStatus(i, l, fmt.Sprintf("err resigning %v", err))
}
leaderStatus(i, l, "resigned")
}