47 lines
998 B
Go
47 lines
998 B
Go
package storage
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import (
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"context"
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"sync"
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)
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type OpenConfig map[string]string
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type Opener func(context.Context, OpenConfig) (Backend, error)
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type Registry struct {
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mu sync.RWMutex
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openers map[string]Opener
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}
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func NewRegistry() *Registry {
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return &Registry{openers: make(map[string]Opener)}
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}
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func (r *Registry) Register(name string, opener Opener) error {
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if name == "" || opener == nil {
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return NewError(OpRegisterBackend, name, "", ErrInvalidPath, nil)
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}
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r.mu.Lock()
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defer r.mu.Unlock()
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if _, exists := r.openers[name]; exists {
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return NewError(OpRegisterBackend, name, "", ErrAlreadyExist, nil)
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}
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r.openers[name] = opener
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return nil
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}
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func (r *Registry) Open(ctx context.Context, name string, cfg OpenConfig) (Backend, error) {
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r.mu.RLock()
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opener, ok := r.openers[name]
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r.mu.RUnlock()
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if !ok {
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return nil, NewError(OpOpenBackend, name, "", ErrUnsupported, nil)
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}
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backend, err := opener(ctx, cfg)
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if err != nil {
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return nil, err
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}
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return backend, nil
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}
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