func (s *scheduler) createTask(sch schedule.Schedule, wfMap *wmap.WorkflowMap, startOnCreate bool, source string, opts ...core.TaskOption) (core.Task, core.TaskErrors) {
logger := schedulerLogger.WithFields(log.Fields{
"_block": "create-task",
"source": source,
"start-on-create": startOnCreate,
})
// Create a container for task errors
te := &taskErrors{
errs: make([]serror.SnapError, 0),
}
// Return error if we are not started.
if s.state != schedulerStarted {
te.errs = append(te.errs, serror.New(ErrSchedulerNotStarted))
f := buildErrorsLog(te.Errors(), logger)
f.Error(ErrSchedulerNotStarted.Error())
return nil, te
}
// Ensure the schedule is valid at this point and time.
if err := sch.Validate(); err != nil {
te.errs = append(te.errs, serror.New(err))
f := buildErrorsLog(te.Errors(), logger)
f.Error("schedule passed not valid")
return nil, te
}
// Generate a workflow from the workflow map
wf, err := wmapToWorkflow(wfMap)
if err != nil {
te.errs = append(te.errs, serror.New(err))
f := buildErrorsLog(te.Errors(), logger)
f.Error("Unable to generate workflow from workflow map")
return nil, te
}
// Create the task object
task, err := newTask(sch, wf, s.workManager, s.metricManager, s.eventManager, opts...)
if err != nil {
te.errs = append(te.errs, serror.New(err))
f := buildErrorsLog(te.Errors(), logger)
f.Error("Unable to create task")
return nil, te
}
// Group dependencies by the node they live on
// and validate them.
depGroups := getWorkflowPlugins(wf.processNodes, wf.publishNodes, wf.metrics)
for k, group := range depGroups {
manager, err := task.RemoteManagers.Get(k)
if err != nil {
te.errs = append(te.errs, serror.New(err))
return nil, te
}
var errs []serror.SnapError
errs = manager.ValidateDeps(group.requestedMetrics, group.subscribedPlugins, wf.configTree)
if len(errs) > 0 {
te.errs = append(te.errs, errs...)
return nil, te
}
}
// Add task to taskCollection
if err := s.tasks.add(task); err != nil {
te.errs = append(te.errs, serror.New(err))
f := buildErrorsLog(te.Errors(), logger)
f.Error("errors during task creation")
return nil, te
}
logger.WithFields(log.Fields{
"task-id": task.ID(),
"task-state": task.State(),
}).Info("task created")
event := &scheduler_event.TaskCreatedEvent{
TaskID: task.id,
StartOnCreate: startOnCreate,
Source: source,
}
defer s.eventManager.Emit(event)
if startOnCreate {
logger.WithFields(log.Fields{
"task-id": task.ID(),
"source": source,
}).Info("starting task on creation")
errs := s.StartTask(task.id)
if errs != nil {
te.errs = append(te.errs, errs...)
}
}
return task, te
}
func (s *scheduler) createTask(sch schedule.Schedule, wfMap *wmap.WorkflowMap, startOnCreate bool, source string, opts ...core.TaskOption) (core.Task, core.TaskErrors) {
logger := schedulerLogger.WithFields(log.Fields{
"_block": "create-task",
"source": source,
})
// Create a container for task errors
te := &taskErrors{
errs: make([]serror.SnapError, 0),
}
// Return error if we are not started.
if s.state != schedulerStarted {
te.errs = append(te.errs, serror.New(ErrSchedulerNotStarted))
f := buildErrorsLog(te.Errors(), logger)
f.Error("scheduler not started")
return nil, te
}
// Ensure the schedule is valid at this point and time.
if err := sch.Validate(); err != nil {
te.errs = append(te.errs, serror.New(err))
f := buildErrorsLog(te.Errors(), logger)
f.Error("schedule passed not valid")
return nil, te
}
// Generate a workflow from the workflow map
wf, err := wmapToWorkflow(wfMap)
if err != nil {
te.errs = append(te.errs, serror.New(err))
f := buildErrorsLog(te.Errors(), logger)
f.Error(ErrSchedulerNotStarted.Error())
return nil, te
}
// validate plugins and metrics
mts, plugins := s.gatherMetricsAndPlugins(wf)
errs := s.metricManager.ValidateDeps(mts, plugins)
if len(errs) > 0 {
te.errs = append(te.errs, errs...)
return nil, te
}
// Bind plugin content type selections in workflow
err = wf.BindPluginContentTypes(s.metricManager)
if err != nil {
te.errs = append(te.errs, serror.New(err))
f := buildErrorsLog(te.Errors(), logger)
f.Error("unable to bind plugin content types")
return nil, te
}
// Create the task object
task := newTask(sch, wf, s.workManager, s.metricManager, s.eventManager, opts...)
// Add task to taskCollection
if err := s.tasks.add(task); err != nil {
te.errs = append(te.errs, serror.New(err))
f := buildErrorsLog(te.Errors(), logger)
f.Error("errors during task creation")
return nil, te
}
logger.WithFields(log.Fields{
"task-id": task.ID(),
"task-state": task.State(),
}).Info("task created")
event := &scheduler_event.TaskCreatedEvent{
TaskID: task.id,
StartOnCreate: startOnCreate,
Source: source,
}
defer s.eventManager.Emit(event)
if startOnCreate {
logger.WithFields(log.Fields{
"task-id": task.ID(),
"source": source,
}).Info("starting task on creation")
errs := s.StartTask(task.id)
if errs != nil {
te.errs = append(te.errs, errs...)
}
}
return task, te
}