74 lines
2.7 KiB
Go
74 lines
2.7 KiB
Go
// Copyright or © or Copr. happyDNS (2020)
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//
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// contact@happydomain.org
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//
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// This software is a computer program whose purpose is to provide a modern
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// interface to interact with DNS systems.
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//
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// This software is governed by the CeCILL license under French law and abiding
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// by the rules of distribution of free software. You can use, modify and/or
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// redistribute the software under the terms of the CeCILL license as
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// circulated by CEA, CNRS and INRIA at the following URL
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// "http://www.cecill.info".
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//
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// As a counterpart to the access to the source code and rights to copy, modify
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// and redistribute granted by the license, users are provided only with a
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// limited warranty and the software's author, the holder of the economic
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// rights, and the successive licensors have only limited liability.
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//
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// In this respect, the user's attention is drawn to the risks associated with
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// loading, using, modifying and/or developing or reproducing the software by
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// the user in light of its specific status of free software, that may mean
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// that it is complicated to manipulate, and that also therefore means that it
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// is reserved for developers and experienced professionals having in-depth
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// computer knowledge. Users are therefore encouraged to load and test the
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// software's suitability as regards their requirements in conditions enabling
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// the security of their systems and/or data to be ensured and, more generally,
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// to use and operate it in the same conditions as regards security.
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//
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// The fact that you are presently reading this means that you have had
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// knowledge of the CeCILL license and that you accept its terms.
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package storage
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import (
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"fmt"
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)
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// StorageEngine defines an interface that handle configuration throught custom
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// flag.
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type StorageEngine string
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func (i *StorageEngine) String() string {
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return string(*i)
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}
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func (i *StorageEngine) Set(value string) (err error) {
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se := StorageEngine(value)
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if _, ok := StorageEngines[se]; !ok {
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return fmt.Errorf("Unexistant storage engine: please select one between: %v", GetStorageEngines())
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}
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*i = se
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return nil
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}
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// MainStore is the singleton holding the database connection.
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var MainStore Storage
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// StorageInstanciation is a function that a Storage implementation
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// has to expose in order to be usable in configuration.
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type StorageInstanciation func() (Storage, error)
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// StorageEngines lists all Storage implementations declared, with a
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// way to instanciate automatically each.
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var StorageEngines = map[StorageEngine]StorageInstanciation{}
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// GetStorageEngines returns all declared Storage implementation.
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func GetStorageEngines() (se []string) {
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for k := range StorageEngines {
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se = append(se, string(k))
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}
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return
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}
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