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limitedspace.go
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limitedspace.go
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// Copyright (C) 2020 Storj Labs, Inc.
// See LICENSE for copying information.
package testblobs
import (
"context"
"go.uber.org/zap"
"storj.io/storj/storage"
"storj.io/storj/storagenode"
)
// ensures that limitedSpaceDB implements storagenode.DB.
var _ storagenode.DB = (*limitedSpaceDB)(nil)
// limitedSpaceDB implements storage node DB with limited free space.
type limitedSpaceDB struct {
storagenode.DB
log *zap.Logger
blobs *LimitedSpaceBlobs
}
// NewLimitedSpaceDB creates a new storage node DB with limited free space.
func NewLimitedSpaceDB(log *zap.Logger, db storagenode.DB, freeSpace int64) storagenode.DB {
return &limitedSpaceDB{
DB: db,
blobs: newLimitedSpaceBlobs(log, db.Pieces(), freeSpace),
log: log,
}
}
// Pieces returns the blob store.
func (lim *limitedSpaceDB) Pieces() storage.Blobs {
return lim.blobs
}
// LimitedSpaceBlobs implements a limited space blob store.
type LimitedSpaceBlobs struct {
storage.Blobs
log *zap.Logger
freeSpace int64
}
// newLimitedSpaceBlobs creates a new limited space blob store wrapping the provided blobs.
func newLimitedSpaceBlobs(log *zap.Logger, blobs storage.Blobs, freeSpace int64) *LimitedSpaceBlobs {
return &LimitedSpaceBlobs{
log: log,
Blobs: blobs,
freeSpace: freeSpace,
}
}
// FreeSpace returns how much free space left for writing.
func (limspace *LimitedSpaceBlobs) FreeSpace(ctx context.Context) (int64, error) {
return limspace.freeSpace, nil
}