forked from TrueCloudLab/frostfs-node
109 lines
3 KiB
Go
109 lines
3 KiB
Go
package writecache
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import (
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"bytes"
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"context"
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"time"
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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/internal/metaerr"
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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-observability/tracing"
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apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
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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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"go.etcd.io/bbolt"
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"go.opentelemetry.io/otel/attribute"
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"go.opentelemetry.io/otel/trace"
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)
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// Get returns object from write-cache.
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//
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// Returns an error of type apistatus.ObjectNotFound if the requested object is missing in write-cache.
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func (c *cache) Get(ctx context.Context, addr oid.Address) (*objectSDK.Object, error) {
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saddr := addr.EncodeToString()
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ctx, span := tracing.StartSpanFromContext(ctx, "writecache.Get",
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trace.WithAttributes(
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attribute.String("address", saddr),
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))
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defer span.End()
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obj, err := c.getInternal(ctx, saddr, addr)
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return obj, metaerr.Wrap(err)
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}
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func (c *cache) getInternal(ctx context.Context, saddr string, addr oid.Address) (*objectSDK.Object, error) {
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found := false
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storageType := StorageTypeUndefined
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startedAt := time.Now()
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defer func() {
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c.metrics.Get(time.Since(startedAt), found, storageType)
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}()
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if !c.modeMtx.TryRLock() {
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return nil, ErrNotInitialized
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}
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defer c.modeMtx.RUnlock()
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if c.mode.NoMetabase() {
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return nil, ErrDegraded
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}
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value, err := Get(c.db, []byte(saddr))
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if err == nil {
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obj := objectSDK.New()
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found = true
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storageType = StorageTypeDB
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return obj, obj.Unmarshal(value)
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}
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res, err := c.fsTree.Get(ctx, common.GetPrm{Address: addr})
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if err != nil {
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return nil, logicerr.Wrap(new(apistatus.ObjectNotFound))
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}
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found = true
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storageType = StorageTypeFSTree
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return res.Object, nil
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}
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// Head returns object header from write-cache.
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//
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// Returns an error of type apistatus.ObjectNotFound if the requested object is missing in write-cache.
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func (c *cache) Head(ctx context.Context, addr oid.Address) (*objectSDK.Object, error) {
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saddr := addr.EncodeToString()
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ctx, span := tracing.StartSpanFromContext(ctx, "Head",
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trace.WithAttributes(
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attribute.String("address", saddr),
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))
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defer span.End()
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obj, err := c.getInternal(ctx, saddr, addr)
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if err != nil {
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return nil, metaerr.Wrap(err)
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}
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return obj.CutPayload(), nil
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}
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// Get fetches object from the underlying database.
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// Key should be a stringified address.
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//
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// Returns an error of type apistatus.ObjectNotFound if the requested object is missing in db.
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func Get(db *bbolt.DB, key []byte) ([]byte, error) {
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var value []byte
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err := db.View(func(tx *bbolt.Tx) error {
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b := tx.Bucket(defaultBucket)
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if b == nil {
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return ErrNoDefaultBucket
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}
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value = b.Get(key)
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if value == nil {
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return logicerr.Wrap(new(apistatus.ObjectNotFound))
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}
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value = bytes.Clone(value)
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return nil
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})
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return value, metaerr.Wrap(err)
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}
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