github.com/containerd/Containerd@v1.4.13/remotes/docker/status.go (about)

     1  /*
     2     Copyright The containerd Authors.
     3  
     4     Licensed under the Apache License, Version 2.0 (the "License");
     5     you may not use this file except in compliance with the License.
     6     You may obtain a copy of the License at
     7  
     8         http://www.apache.org/licenses/LICENSE-2.0
     9  
    10     Unless required by applicable law or agreed to in writing, software
    11     distributed under the License is distributed on an "AS IS" BASIS,
    12     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13     See the License for the specific language governing permissions and
    14     limitations under the License.
    15  */
    16  
    17  package docker
    18  
    19  import (
    20  	"sync"
    21  
    22  	"github.com/containerd/containerd/content"
    23  	"github.com/containerd/containerd/errdefs"
    24  	"github.com/pkg/errors"
    25  )
    26  
    27  // Status of a content operation
    28  type Status struct {
    29  	content.Status
    30  
    31  	// UploadUUID is used by the Docker registry to reference blob uploads
    32  	UploadUUID string
    33  }
    34  
    35  // StatusTracker to track status of operations
    36  type StatusTracker interface {
    37  	GetStatus(string) (Status, error)
    38  	SetStatus(string, Status)
    39  }
    40  
    41  type memoryStatusTracker struct {
    42  	statuses map[string]Status
    43  	m        sync.Mutex
    44  }
    45  
    46  // NewInMemoryTracker returns a StatusTracker that tracks content status in-memory
    47  func NewInMemoryTracker() StatusTracker {
    48  	return &memoryStatusTracker{
    49  		statuses: map[string]Status{},
    50  	}
    51  }
    52  
    53  func (t *memoryStatusTracker) GetStatus(ref string) (Status, error) {
    54  	t.m.Lock()
    55  	defer t.m.Unlock()
    56  	status, ok := t.statuses[ref]
    57  	if !ok {
    58  		return Status{}, errors.Wrapf(errdefs.ErrNotFound, "status for ref %v", ref)
    59  	}
    60  	return status, nil
    61  }
    62  
    63  func (t *memoryStatusTracker) SetStatus(ref string, status Status) {
    64  	t.m.Lock()
    65  	t.statuses[ref] = status
    66  	t.m.Unlock()
    67  }