56 lines
1.7 KiB
Go
56 lines
1.7 KiB
Go
package retrievalstoremgr
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import (
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"github.com/filecoin-project/lotus/blockstore"
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"github.com/ipfs/go-blockservice"
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offline "github.com/ipfs/go-ipfs-exchange-offline"
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ipldformat "github.com/ipfs/go-ipld-format"
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"github.com/ipfs/go-merkledag"
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)
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// RetrievalStore references a store for a retrieval deal.
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type RetrievalStore interface {
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DAGService() ipldformat.DAGService
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}
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// RetrievalStoreManager manages stores for retrieval deals, abstracting
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// the underlying storage mechanism.
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type RetrievalStoreManager interface {
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NewStore() (RetrievalStore, error)
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ReleaseStore(RetrievalStore) error
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}
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// BlockstoreRetrievalStoreManager manages a single blockstore as if it were multiple stores
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type BlockstoreRetrievalStoreManager struct {
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bs blockstore.BasicBlockstore
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}
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var _ RetrievalStoreManager = &BlockstoreRetrievalStoreManager{}
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// NewBlockstoreRetrievalStoreManager returns a new blockstore based RetrievalStoreManager
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func NewBlockstoreRetrievalStoreManager(bs blockstore.BasicBlockstore) RetrievalStoreManager {
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return &BlockstoreRetrievalStoreManager{
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bs: bs,
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}
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}
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// NewStore creates a new store (just uses underlying blockstore)
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func (brsm *BlockstoreRetrievalStoreManager) NewStore() (RetrievalStore, error) {
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return &blockstoreRetrievalStore{
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dagService: merkledag.NewDAGService(blockservice.New(brsm.bs, offline.Exchange(brsm.bs))),
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}, nil
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}
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// ReleaseStore for this implementation does nothing
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func (brsm *BlockstoreRetrievalStoreManager) ReleaseStore(RetrievalStore) error {
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return nil
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}
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type blockstoreRetrievalStore struct {
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dagService ipldformat.DAGService
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}
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func (brs *blockstoreRetrievalStore) DAGService() ipldformat.DAGService {
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return brs.dagService
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}
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