func (vm *VarManager) TopologyChanged(topology *configuration.Topology, done func(bool)) {
resultChan := make(chan struct{})
enqueued := vm.exe.Enqueue(func() {
if od := vm.onDisk; od != nil {
vm.onDisk = nil
od(false)
}
vm.Topology = topology
oldRollAllowed := vm.RollAllowed
if !vm.RollAllowed {
vm.RollAllowed = topology == nil || !topology.NextBarrierReached1(vm.RMId)
}
server.Log("VarManager", fmt.Sprintf("%p", vm), "rollAllowed:", oldRollAllowed, "->", vm.RollAllowed, fmt.Sprintf("%p", topology))
goingToDisk := topology != nil && topology.NextBarrierReached1(vm.RMId) && !topology.NextBarrierReached2(vm.RMId)
doneWrapped := func(result bool) {
close(resultChan)
done(result)
}
if goingToDisk {
vm.onDisk = doneWrapped
vm.checkAllDisk()
} else {
server.Log("VarManager", fmt.Sprintf("%p", vm), "calling done", fmt.Sprintf("%p", topology))
doneWrapped(true)
}
})
if enqueued {
go vm.exe.WithTerminatedChan(func(terminated chan struct{}) {
select {
case <-resultChan:
case <-terminated:
select {
case <-resultChan:
default:
done(false)
}
}
})
} else {
done(false)
}
}
