f46aea6187
Packages related to transfer and unpacking provide core interfaces which use other core interfaces and part of common functionality. Signed-off-by: Derek McGowan <derek@mcg.dev>
64 lines
1.5 KiB
Go
64 lines
1.5 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package plugins
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import (
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"fmt"
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"reflect"
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"sync"
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"github.com/containerd/errdefs"
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"github.com/containerd/typeurl/v2"
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)
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var register = struct {
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sync.RWMutex
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r map[string]reflect.Type
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}{}
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func Register(apiObject, transferObject interface{}) {
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url, err := typeurl.TypeURL(apiObject)
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if err != nil {
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panic(err)
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}
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// Lock
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register.Lock()
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defer register.Unlock()
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if register.r == nil {
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register.r = map[string]reflect.Type{}
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}
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if _, ok := register.r[url]; ok {
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panic(fmt.Sprintf("url already registered: %v", url))
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}
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t := reflect.TypeOf(transferObject)
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if t.Kind() == reflect.Ptr {
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t = t.Elem()
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}
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register.r[url] = t
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}
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func ResolveType(any typeurl.Any) (interface{}, error) {
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register.RLock()
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defer register.RUnlock()
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if register.r != nil {
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if t, ok := register.r[any.GetTypeUrl()]; ok {
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return reflect.New(t).Interface(), nil
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}
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}
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return nil, fmt.Errorf("%v not registered: %w", any.GetTypeUrl(), errdefs.ErrNotFound)
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}
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