63 lines
1.8 KiB
Go
63 lines
1.8 KiB
Go
package container
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import (
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"errors"
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"fmt"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client"
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cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
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"github.com/nspcc-dev/neo-go/pkg/rpcclient/unwrap"
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"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
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)
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// ContainersOf returns a list of container identifiers belonging
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// to the specified user of FrostFS system. If idUser is nil, returns the list of all containers.
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//
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// If remote RPC does not support neo-go session API, fallback to List() method.
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func (c *Client) ContainersOf(idUser *user.ID) ([]cid.ID, error) {
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var rawID []byte
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if idUser != nil {
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rawID = idUser.WalletBytes()
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}
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var cidList []cid.ID
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cb := func(item stackitem.Item) error {
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rawID, err := client.BytesFromStackItem(item)
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if err != nil {
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return fmt.Errorf("could not get byte array from stack item (%s): %w", containersOfMethod, err)
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}
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var id cid.ID
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err = id.Decode(rawID)
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if err != nil {
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return fmt.Errorf("decode container ID: %w", err)
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}
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cidList = append(cidList, id)
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return nil
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}
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// We would like to have batch size as big as possible,
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// to reduce the number of round-trips and avoid creating sessions.
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// The limit depends on 2 things:
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// 1. VM limits: max 2048 items on stack.
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// 2. JSON encoded size for the item with type = 128k.
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// It turns out, that for container ID the second limit is hit first,
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// 512 is big enough value and it is beautiful.
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const batchSize = 512
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cnrHash := c.client.ContractAddress()
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err := c.client.Morph().TestInvokeIterator(cb, batchSize, cnrHash, containersOfMethod, rawID)
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if err != nil {
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if errors.Is(err, unwrap.ErrNoSessionID) {
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return c.list(idUser)
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}
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return nil, err
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}
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return cidList, nil
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}
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