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transfer.go
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transfer.go
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// Copyright Project Harbor 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 transfer
import (
"errors"
"fmt"
"github.com/goharbor/harbor/src/replication/model"
)
var (
registry = map[model.ResourceType]Factory{}
)
// Factory creates a specific Transfer. The "Logger" is used
// to log the processing messages and the "StopFunc"
// can be used to check whether the task has been stopped
// during the processing progress
type Factory func(Logger, StopFunc) (Transfer, error)
// Transfer defines an interface used to transfer the source
// resource to the destination
type Transfer interface {
Transfer(src *model.Resource, dst *model.Resource) error
}
// Logger defines an interface for logging
type Logger interface {
// For debuging
Debug(v ...interface{})
// For debuging with format
Debugf(format string, v ...interface{})
// For logging info
Info(v ...interface{})
// For logging info with format
Infof(format string, v ...interface{})
// For warning
Warning(v ...interface{})
// For warning with format
Warningf(format string, v ...interface{})
// For logging error
Error(v ...interface{})
// For logging error with format
Errorf(format string, v ...interface{})
}
// StopFunc is a function used to check whether the transfer
// process is stopped
type StopFunc func() bool
// RegisterFactory registers one transfer factory to the registry
func RegisterFactory(name model.ResourceType, factory Factory) error {
if !name.Valid() {
return errors.New("invalid resource transfer factory name")
}
if factory == nil {
return errors.New("empty resource transfer factory")
}
if _, exist := registry[name]; exist {
return fmt.Errorf("resource transfer factory for %s already exists", name)
}
registry[name] = factory
return nil
}
// GetFactory gets the transfer factory by the specified name
func GetFactory(name model.ResourceType) (Factory, error) {
factory, exist := registry[name]
if !exist {
return nil, fmt.Errorf("transfer factory for %s not found", name)
}
return factory, nil
}