woodpecker/server/queue/persistent.go

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// Copyright 2021 Woodpecker Authors
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// Copyright 2018 Drone.IO Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package queue
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import (
"context"
"github.com/pkg/errors"
"github.com/rs/zerolog/log"
"go.woodpecker-ci.org/woodpecker/v2/server/model"
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)
// WithTaskStore returns a queue that is backed by the TaskStore. This
// ensures the task Queue can be restored when the system starts.
func WithTaskStore(q Queue, s model.TaskStore) Queue {
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tasks, _ := s.TaskList()
if err := q.PushAtOnce(context.Background(), tasks); err != nil {
log.Error().Err(err).Msg("PushAtOnce failed")
}
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return &persistentQueue{q, s}
}
type persistentQueue struct {
Queue
store model.TaskStore
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}
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// Push pushes a task to the tail of this queue.
func (q *persistentQueue) Push(c context.Context, task *model.Task) error {
if err := q.store.TaskInsert(task); err != nil {
return err
}
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err := q.Queue.Push(c, task)
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if err != nil {
if err2 := q.store.TaskDelete(task.ID); err2 != nil {
err = errors.Wrapf(err, "delete task '%s' failed: %v", task.ID, err2)
}
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}
return err
}
// PushAtOnce pushes multiple tasks to the tail of this queue.
func (q *persistentQueue) PushAtOnce(c context.Context, tasks []*model.Task) error {
// TODO: invent store.NewSession who return context including a session and make TaskInsert & TaskDelete use it
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for _, task := range tasks {
if err := q.store.TaskInsert(task); err != nil {
return err
}
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}
err := q.Queue.PushAtOnce(c, tasks)
if err != nil {
for _, task := range tasks {
if err := q.store.TaskDelete(task.ID); err != nil {
return err
}
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}
}
return err
}
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// Poll retrieves and removes a task head of this queue.
func (q *persistentQueue) Poll(c context.Context, agentID int64, f FilterFn) (*model.Task, error) {
task, err := q.Queue.Poll(c, agentID, f)
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if task != nil {
log.Debug().Msgf("pull queue item: %s: remove from backup", task.ID)
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if derr := q.store.TaskDelete(task.ID); derr != nil {
log.Error().Msgf("pull queue item: %s: failed to remove from backup: %s", task.ID, derr)
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} else {
log.Debug().Msgf("pull queue item: %s: successfully removed from backup", task.ID)
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}
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}
return task, err
}
// Evict removes a pending task from the queue.
func (q *persistentQueue) Evict(c context.Context, id string) error {
err := q.Queue.Evict(c, id)
if err == nil {
return q.store.TaskDelete(id)
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}
return err
}
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// EvictAtOnce removes a pending task from the queue.
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func (q *persistentQueue) EvictAtOnce(c context.Context, ids []string) error {
if err := q.Queue.EvictAtOnce(c, ids); err != nil {
return err
}
for _, id := range ids {
if err := q.store.TaskDelete(id); err != nil {
return err
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}
}
return nil
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}