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flatstorage.go
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flatstorage.go
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package flatstorage
import (
"os"
"path/filepath"
"sync"
"github.com/sirupsen/logrus"
)
// FlatStorage is the interface to manage a flatstorage
type FlatStorage struct {
// Storage changes must be made synchronous.
mutex *sync.Mutex
// Collection of mutexes per dataset.
mutexes map[string]*sync.Mutex
// File-system location of the filestorage
path string
// Logger which this storage will write to
logger *logrus.Logger
}
func (fs *FlatStorage) resourcePath(collection string, resource string) string {
path := filepath.Join(fs.collectionPath(collection), resource)
if filepath.Ext(path) != ".json" {
path += ".json"
}
return path
}
func (fs *FlatStorage) collectionPath(collection string) string {
return filepath.Join(fs.path, collection)
}
// NewFlatStorage opens a flatstorage at specified path
func NewFlatStorage(path string) (*FlatStorage, error) {
path = filepath.Clean(path)
if !pathExists(path) {
err := os.MkdirAll(path, 0755)
if err != nil {
logrus.WithField("path", path).Error("Could not create database", err)
return nil, err
}
}
return &FlatStorage{
path: filepath.Clean(path),
mutex: &sync.Mutex{},
mutexes: make(map[string]*sync.Mutex),
logger: logrus.New(),
}, nil
}