131 lines
2.9 KiB
Go
131 lines
2.9 KiB
Go
/*
|
|
Copyright The containerd Authors.
|
|
|
|
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
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
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 runtime
|
|
|
|
import (
|
|
"context"
|
|
"sync"
|
|
|
|
"github.com/containerd/containerd/namespaces"
|
|
"github.com/pkg/errors"
|
|
)
|
|
|
|
var (
|
|
// ErrTaskNotExists is returned when a task does not exist
|
|
ErrTaskNotExists = errors.New("task does not exist")
|
|
// ErrTaskAlreadyExists is returned when a task already exists
|
|
ErrTaskAlreadyExists = errors.New("task already exists")
|
|
)
|
|
|
|
// NewTaskList returns a new TaskList
|
|
func NewTaskList() *TaskList {
|
|
return &TaskList{
|
|
tasks: make(map[string]map[string]Task),
|
|
}
|
|
}
|
|
|
|
// TaskList holds and provides locking around tasks
|
|
type TaskList struct {
|
|
mu sync.Mutex
|
|
tasks map[string]map[string]Task
|
|
}
|
|
|
|
// Get a task
|
|
func (l *TaskList) Get(ctx context.Context, id string) (Task, error) {
|
|
l.mu.Lock()
|
|
defer l.mu.Unlock()
|
|
namespace, err := namespaces.NamespaceRequired(ctx)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
tasks, ok := l.tasks[namespace]
|
|
if !ok {
|
|
return nil, ErrTaskNotExists
|
|
}
|
|
t, ok := tasks[id]
|
|
if !ok {
|
|
return nil, ErrTaskNotExists
|
|
}
|
|
return t, nil
|
|
}
|
|
|
|
// GetAll tasks under a namespace
|
|
func (l *TaskList) GetAll(ctx context.Context, noNS bool) ([]Task, error) {
|
|
l.mu.Lock()
|
|
defer l.mu.Unlock()
|
|
var o []Task
|
|
if noNS {
|
|
for ns := range l.tasks {
|
|
for _, t := range l.tasks[ns] {
|
|
o = append(o, t)
|
|
}
|
|
}
|
|
return o, nil
|
|
}
|
|
namespace, err := namespaces.NamespaceRequired(ctx)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
tasks, ok := l.tasks[namespace]
|
|
if !ok {
|
|
return o, nil
|
|
}
|
|
for _, t := range tasks {
|
|
o = append(o, t)
|
|
}
|
|
return o, nil
|
|
}
|
|
|
|
// Add a task
|
|
func (l *TaskList) Add(ctx context.Context, t Task) error {
|
|
namespace, err := namespaces.NamespaceRequired(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return l.AddWithNamespace(namespace, t)
|
|
}
|
|
|
|
// AddWithNamespace adds a task with the provided namespace
|
|
func (l *TaskList) AddWithNamespace(namespace string, t Task) error {
|
|
l.mu.Lock()
|
|
defer l.mu.Unlock()
|
|
|
|
id := t.ID()
|
|
if _, ok := l.tasks[namespace]; !ok {
|
|
l.tasks[namespace] = make(map[string]Task)
|
|
}
|
|
if _, ok := l.tasks[namespace][id]; ok {
|
|
return errors.Wrap(ErrTaskAlreadyExists, id)
|
|
}
|
|
l.tasks[namespace][id] = t
|
|
return nil
|
|
}
|
|
|
|
// Delete a task
|
|
func (l *TaskList) Delete(ctx context.Context, id string) {
|
|
l.mu.Lock()
|
|
defer l.mu.Unlock()
|
|
namespace, err := namespaces.NamespaceRequired(ctx)
|
|
if err != nil {
|
|
return
|
|
}
|
|
tasks, ok := l.tasks[namespace]
|
|
if ok {
|
|
delete(tasks, id)
|
|
}
|
|
}
|