forked from TrueCloudLab/frostfs-node
66 lines
2.5 KiB
Go
66 lines
2.5 KiB
Go
package writecache
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import (
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"context"
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"errors"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/compression"
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meta "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/metabase"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/util/logicerr"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
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objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
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oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
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)
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// Info groups the information about write-cache.
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type Info struct {
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// Full path to the write-cache.
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Path string
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}
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// Cache represents write-cache for objects.
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type Cache interface {
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Get(ctx context.Context, address oid.Address) (*objectSDK.Object, error)
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Head(context.Context, oid.Address) (*objectSDK.Object, error)
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// Delete removes object referenced by the given oid.Address from the
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// Cache. Returns any error encountered that prevented the object to be
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// removed.
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//
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// Returns apistatus.ObjectNotFound if object is missing in the Cache.
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// Returns ErrReadOnly if the Cache is currently in the read-only mode.
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Delete(context.Context, oid.Address) error
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Put(context.Context, common.PutPrm) (common.PutRes, error)
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SetMode(mode.Mode) error
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SetLogger(*logger.Logger)
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DumpInfo() Info
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Flush(context.Context, bool) error
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Init() error
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Open(readOnly bool) error
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Close() error
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}
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// MainStorage is the interface of the underlying storage of Cache implementations.
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type MainStorage interface {
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Compressor() *compression.Config
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Exists(context.Context, common.ExistsPrm) (common.ExistsRes, error)
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Put(context.Context, common.PutPrm) (common.PutRes, error)
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}
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// Metabase is the interface of the metabase used by Cache implementations.
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type Metabase interface {
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UpdateStorageID(meta.UpdateStorageIDPrm) (meta.UpdateStorageIDRes, error)
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}
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var (
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// ErrReadOnly is returned when Put/Write is performed in a read-only mode.
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ErrReadOnly = logicerr.New("write-cache is in read-only mode")
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// ErrNotInitialized is returned when write-cache is initializing.
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ErrNotInitialized = logicerr.New("write-cache is not initialized yet")
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// ErrBigObject is returned when object is too big to be placed in cache.
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ErrBigObject = errors.New("too big object")
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// ErrOutOfSpace is returned when there is no space left to put a new object.
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ErrOutOfSpace = errors.New("no space left in the write cache")
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)
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