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(#15) support basic lifecycle events
Events emitted for task changes initially. ajc task watch updated to use these events Signed-off-by: R.I.Pienaar <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| // Copyright (c) 2022, R.I. Pienaar and the Project contributors | ||
| // | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
|
|
||
| package asyncjobs | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "time" | ||
|
|
||
| "github.com/segmentio/ksuid" | ||
| ) | ||
|
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| type BaseEvent struct { | ||
| EventID string `json:"event_id"` | ||
| EventType string `json:"type"` | ||
| TimeStamp int64 `json:"timestamp"` | ||
| } | ||
|
|
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| type TaskStateChangeEvent struct { | ||
| TaskID string `json:"task_id"` | ||
| State TaskState `json:"state"` | ||
| Tries int `json:"tries"` | ||
| Queue string `json:"queue"` | ||
| TaskType string `json:"task_type"` | ||
| LastErr string `json:"last_error,omitempty"` | ||
| Age time.Duration `json:"task_age,omitempty"` | ||
|
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| BaseEvent | ||
| } | ||
|
|
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| const ( | ||
| // TaskStateChangeEventType is the event type for TaskStateChangeEvent types | ||
| TaskStateChangeEventType = "io.choria.asyncjobs.v1.task_state" | ||
| ) | ||
|
|
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| func ParseEventJSON(event []byte) (interface{}, string, error) { | ||
| var base BaseEvent | ||
| err := json.Unmarshal(event, &base) | ||
| if err != nil { | ||
| return nil, "", err | ||
| } | ||
|
|
||
| switch base.EventType { | ||
| case TaskStateChangeEventType: | ||
| var e TaskStateChangeEvent | ||
| err := json.Unmarshal(event, &e) | ||
| if err != nil { | ||
| return nil, "", err | ||
| } | ||
|
|
||
| return e, base.EventType, nil | ||
| default: | ||
| return nil, base.EventType, fmt.Errorf("unknown event type %s", base.EventType) | ||
| } | ||
| } | ||
|
|
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| // NewTaskStateChangeEvent creates a new event notifying of a change in task state | ||
| func NewTaskStateChangeEvent(t *Task) (*TaskStateChangeEvent, error) { | ||
| eid, err := ksuid.NewRandom() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| e := &TaskStateChangeEvent{ | ||
| TaskID: t.ID, | ||
| State: t.State, | ||
| Tries: t.Tries, | ||
| Queue: t.Queue, | ||
| TaskType: t.Type, | ||
| LastErr: t.LastErr, | ||
| BaseEvent: BaseEvent{ | ||
| EventID: eid.String(), | ||
| TimeStamp: eid.Time().UnixNano(), | ||
| EventType: TaskStateChangeEventType, | ||
| }, | ||
| } | ||
|
|
||
| if !t.CreatedAt.IsZero() { | ||
| e.Age = time.Since(t.CreatedAt) | ||
| } | ||
|
|
||
| return e, nil | ||
| } |
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