// execute an explicit task reconciliation, as per http://mesos.apache.org/documentation/latest/reconciliation/
func (k *QingYuanScheduler) explicitlyReconcileTasks(driver bindings.SchedulerDriver, taskToSlave map[string]string, cancel <-chan struct{}) error {
log.Info("explicit reconcile tasks")
// tell mesos to send us the latest status updates for all the non-terminal tasks that we know about
statusList := []*mesos.TaskStatus{}
remaining := util.KeySet(reflect.ValueOf(taskToSlave))
for taskId, slaveId := range taskToSlave {
if slaveId == "" {
delete(taskToSlave, taskId)
continue
}
statusList = append(statusList, &mesos.TaskStatus{
TaskId: mutil.NewTaskID(taskId),
SlaveId: mutil.NewSlaveID(slaveId),
State: mesos.TaskState_TASK_RUNNING.Enum(), // req'd field, doesn't have to reflect reality
})
}
select {
case <-cancel:
return reconciliationCancelledErr
default:
if _, err := driver.ReconcileTasks(statusList); err != nil {
return err
}
}
start := time.Now()
first := true
for backoff := 1 * time.Second; first || remaining.Len() > 0; backoff = backoff * 2 {
first = false
// nothing to do here other than wait for status updates..
if backoff > k.schedcfg.ExplicitReconciliationMaxBackoff.Duration {
backoff = k.schedcfg.ExplicitReconciliationMaxBackoff.Duration
}
select {
case <-cancel:
return reconciliationCancelledErr
case <-time.After(backoff):
for taskId := range remaining {
if task, _ := k.taskRegistry.Get(taskId); task != nil && explicitTaskFilter(task) && task.UpdatedTime.Before(start) {
// keep this task in remaining list
continue
}
remaining.Delete(taskId)
}
}
}
return nil
}
func newNavigationSteps(path string) (*navigationSteps, error) {
steps := []navigationStep{}
individualParts := strings.Split(path, ".")
currType := reflect.TypeOf(clientcmdapi.Config{})
currPartIndex := 0
for currPartIndex < len(individualParts) {
switch currType.Kind() {
case reflect.Map:
// if we're in a map, we need to locate a name. That name may contain dots, so we need to know what tokens are legal for the map's value type
// for example, we could have a set request like: `set clusters.10.10.12.56.insecure-skip-tls-verify true`. We enter this case with
// steps representing 10, 10, 12, 56, insecure-skip-tls-verify. The name is "10.10.12.56", so we want to collect all those parts together and
// store them as a single step. In order to do that, we need to determine what set of tokens is a legal step AFTER the name of the map key
// This set of reflective code pulls the type of the map values, uses that type to look up the set of legal tags. Those legal tags are used to
// walk the list of remaining parts until we find a match to a legal tag or the end of the string. That name is used to burn all the used parts.
mapValueType := currType.Elem()
mapValueOptions, err := getPotentialTypeValues(mapValueType)
if err != nil {
return nil, err
}
nextPart := findNameStep(individualParts[currPartIndex:], util.KeySet(reflect.ValueOf(mapValueOptions)))
steps = append(steps, navigationStep{nextPart, mapValueType})
currPartIndex += len(strings.Split(nextPart, "."))
currType = mapValueType
case reflect.Struct:
nextPart := individualParts[currPartIndex]
options, err := getPotentialTypeValues(currType)
if err != nil {
return nil, err
}
fieldType, exists := options[nextPart]
if !exists {
return nil, fmt.Errorf("unable to parse %v after %v at %v", path, steps, currType)
}
steps = append(steps, navigationStep{nextPart, fieldType})
currPartIndex += len(strings.Split(nextPart, "."))
currType = fieldType
}
}
return &navigationSteps{steps, 0}, nil
}