mirror of
https://github.com/chrislusf/seaweedfs
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61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
package backend
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import (
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"io"
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"os"
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"time"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/util"
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"github.com/spf13/viper"
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)
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type BackendStorageFile interface {
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io.ReaderAt
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io.WriterAt
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Truncate(off int64) error
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io.Closer
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GetStat() (datSize int64, modTime time.Time, err error)
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String() string
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Instantiate(src *os.File) error
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}
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type BackendStorage interface {
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Name() string
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NewStorageFile(key string) BackendStorageFile
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}
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type StorageType string
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type BackendStorageFactory interface {
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StorageType() StorageType
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BuildStorage(configuration util.Configuration, id string) (BackendStorage, error)
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}
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var (
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BackendStorageFactories = make(map[StorageType]BackendStorageFactory)
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BackendStorages = make(map[string]BackendStorage)
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)
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func LoadConfiguration(config *viper.Viper) {
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StorageBackendPrefix := "storage.backend"
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backendSub := config.Sub(StorageBackendPrefix)
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for backendTypeName, _ := range config.GetStringMap(StorageBackendPrefix) {
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backendStorageFactory, found := BackendStorageFactories[StorageType(backendTypeName)]
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if !found {
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glog.Fatalf("backend storage type %s not found", backendTypeName)
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}
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backendTypeSub := backendSub.Sub(backendTypeName)
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for backendStorageId, _ := range backendSub.GetStringMap(backendTypeName) {
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backendStorage, buildErr := backendStorageFactory.BuildStorage(backendTypeSub.Sub(backendStorageId), backendStorageId)
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if buildErr != nil {
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glog.Fatalf("fail to create backend storage %s.%s", backendTypeName, backendStorageId)
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}
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BackendStorages[backendTypeName+"."+backendStorageId] = backendStorage
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}
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}
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}
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