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state_sync_map.go
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/
state_sync_map.go
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/*
* Copyright The Dragonfly 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 progress
import (
"github.com/dragonflyoss/Dragonfly/pkg/errortypes"
"github.com/dragonflyoss/Dragonfly/pkg/syncmap"
"github.com/pkg/errors"
)
// stateSyncMap is a thread-safe map for progress state.
type stateSyncMap struct {
*syncmap.SyncMap
}
// newStateSyncMap returns a new stateSyncMap.
func newStateSyncMap() *stateSyncMap {
return &stateSyncMap{syncmap.NewSyncMap()}
}
// add a key-value pair into the *sync.Map.
// The ErrEmptyValue error will be returned if the key is empty.
func (mmap *stateSyncMap) add(key string, value interface{}) error {
return mmap.Add(key, value)
}
// get returns result as interface{} according to the key.
// The ErrEmptyValue error will be returned if the key is empty.
// And the ErrDataNotFound error will be returned if the key cannot be found.
func (mmap *stateSyncMap) get(key string) (interface{}, error) {
return mmap.Get(key)
}
// getAsSuperState returns result as *superState.
// The ErrConvertFailed error will be returned if the assertion fails.
func (mmap *stateSyncMap) getAsSuperState(key string) (*superState, error) {
v, err := mmap.get(key)
if err != nil {
return nil, errors.Wrapf(err, "key: %s", key)
}
if value, ok := v.(*superState); ok {
return value, nil
}
return nil, errors.Wrapf(errortypes.ErrConvertFailed, "key %s: %v", key, v)
}
// getAsClientState returns result as *clientState.
// The ErrConvertFailed error will be returned if the assertion fails.
func (mmap *stateSyncMap) getAsClientState(key string) (*clientState, error) {
v, err := mmap.get(key)
if err != nil {
return nil, errors.Wrapf(err, "key: %s", key)
}
if value, ok := v.(*clientState); ok {
return value, nil
}
return nil, errors.Wrapf(errortypes.ErrConvertFailed, "key %s: %v", key, v)
}
// getAsPeerState returns result as *peerState.
// The ErrConvertFailed error will be returned if the assertion fails.
func (mmap *stateSyncMap) getAsPeerState(key string) (*peerState, error) {
v, err := mmap.get(key)
if err != nil {
return nil, errors.Wrapf(err, "key: %s", key)
}
if value, ok := v.(*peerState); ok {
return value, nil
}
return nil, errors.Wrapf(errortypes.ErrConvertFailed, "key %s: %v", key, v)
}
// getAsPieceState returns result as *pieceState.
// The ErrConvertFailed error will be returned if the assertion fails.
func (mmap *stateSyncMap) getAsPieceState(key string) (*pieceState, error) {
v, err := mmap.get(key)
if err != nil {
return nil, errors.Wrapf(err, "key: %s", key)
}
if value, ok := v.(*pieceState); ok {
return value, nil
}
return nil, errors.Wrapf(errortypes.ErrConvertFailed, "key %s: %v", key, v)
}
// remove deletes the key-value pair from the mmap.
// The ErrEmptyValue error will be returned if the key is empty.
// And the ErrDataNotFound error will be returned if the key cannot be found.
func (mmap *stateSyncMap) remove(key string) error {
return mmap.Remove(key)
}