138 lines
3.9 KiB
Go
138 lines
3.9 KiB
Go
package middleware
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import (
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"context"
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"fmt"
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"time"
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"github.com/influxdata/influxdb/v2"
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)
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// CoordinatingCheckService acts as a CheckService decorator that handles coordinating the api request
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// with the required task control actions asynchronously via a message dispatcher
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type CoordinatingCheckService struct {
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influxdb.CheckService
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coordinator Coordinator
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taskService influxdb.TaskService
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Now func() time.Time
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}
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// NewCheckService constructs a new coordinating check service
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func NewCheckService(cs influxdb.CheckService, ts influxdb.TaskService, coordinator Coordinator) *CoordinatingCheckService {
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c := &CoordinatingCheckService{
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CheckService: cs,
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taskService: ts,
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coordinator: coordinator,
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Now: func() time.Time {
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return time.Now().UTC()
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},
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}
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return c
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}
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// CreateCheck Creates a check and Publishes the change it can be scheduled.
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func (cs *CoordinatingCheckService) CreateCheck(ctx context.Context, c influxdb.CheckCreate, userID influxdb.ID) error {
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if err := cs.CheckService.CreateCheck(ctx, c, userID); err != nil {
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return err
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}
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t, err := cs.taskService.FindTaskByID(ctx, c.GetTaskID())
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if err != nil {
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return err
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}
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if err := cs.coordinator.TaskCreated(ctx, t); err != nil {
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if derr := cs.CheckService.DeleteCheck(ctx, c.GetID()); derr != nil {
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return fmt.Errorf("schedule task failed: %s\n\tcleanup also failed: %s", err, derr)
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}
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return err
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}
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return nil
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}
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// UpdateCheck Updates a check and publishes the change so the task owner can act on the update
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func (cs *CoordinatingCheckService) UpdateCheck(ctx context.Context, id influxdb.ID, c influxdb.CheckCreate) (influxdb.Check, error) {
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from, err := cs.CheckService.FindCheckByID(ctx, id)
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if err != nil {
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return nil, err
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}
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fromTask, err := cs.taskService.FindTaskByID(ctx, from.GetTaskID())
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if err != nil {
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return nil, err
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}
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to, err := cs.CheckService.UpdateCheck(ctx, id, c)
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if err != nil {
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return to, err
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}
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toTask, err := cs.taskService.FindTaskByID(ctx, to.GetTaskID())
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if err != nil {
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return nil, err
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}
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// if the update is to activate and the previous task was inactive we should add a "latest completed" update
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// this allows us to see not run the task for inactive time
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if fromTask.Status == string(influxdb.TaskInactive) && toTask.Status == string(influxdb.TaskActive) {
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toTask.LatestCompleted = cs.Now()
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}
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return to, cs.coordinator.TaskUpdated(ctx, fromTask, toTask)
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}
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// PatchCheck Updates a check and publishes the change so the task owner can act on the update
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func (cs *CoordinatingCheckService) PatchCheck(ctx context.Context, id influxdb.ID, upd influxdb.CheckUpdate) (influxdb.Check, error) {
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from, err := cs.CheckService.FindCheckByID(ctx, id)
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if err != nil {
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return nil, err
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}
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fromTask, err := cs.taskService.FindTaskByID(ctx, from.GetTaskID())
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if err != nil {
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return nil, err
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}
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to, err := cs.CheckService.PatchCheck(ctx, id, upd)
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if err != nil {
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return to, err
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}
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toTask, err := cs.taskService.FindTaskByID(ctx, to.GetTaskID())
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if err != nil {
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return nil, err
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}
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// if the update is to activate and the previous task was inactive we should add a "latest completed" update
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// this allows us to see not run the task for inactive time
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if fromTask.Status == string(influxdb.TaskInactive) && toTask.Status == string(influxdb.TaskActive) {
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toTask.LatestCompleted = cs.Now()
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}
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return to, cs.coordinator.TaskUpdated(ctx, fromTask, toTask)
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}
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// DeleteCheck delete the check and publishes the change, to allow the task owner to find out about this change faster.
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func (cs *CoordinatingCheckService) DeleteCheck(ctx context.Context, id influxdb.ID) error {
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check, err := cs.CheckService.FindCheckByID(ctx, id)
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if err != nil {
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return err
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}
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t, err := cs.taskService.FindTaskByID(ctx, check.GetTaskID())
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if err != nil {
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return err
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}
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if err := cs.coordinator.TaskDeleted(ctx, t.ID); err != nil {
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return err
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}
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return cs.CheckService.DeleteCheck(ctx, id)
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}
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