322c3a167b
This is first step in supporting node aliases. It adds a table that automatically assigns aliases to nodes inserted into the table. Change-Id: Ibdf40097c3c1e5b371500203f8db203505a48adc
80 lines
1.9 KiB
Go
80 lines
1.9 KiB
Go
// Copyright (C) 2021 Storj Labs, Inc.
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// See LICENSE for copying information.
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package metabase
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import (
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"context"
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"github.com/zeebo/errs"
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"storj.io/common/storj"
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"storj.io/storj/private/dbutil/pgutil"
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)
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// NodeAlias is a metabase local alias for NodeID-s to reduce segment table size.
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type NodeAlias int32
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// NodeAliasEntry is a mapping between NodeID and NodeAlias.
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type NodeAliasEntry struct {
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ID storj.NodeID
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Alias NodeAlias
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}
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// EnsureNodeAliases contains arguments necessary for creating NodeAlias-es.
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type EnsureNodeAliases struct {
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Nodes []storj.NodeID
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}
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// EnsureNodeAliases ensures that the supplied node ID-s have a alias.
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// It's safe to concurrently try and create node ID-s for the same NodeID.
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func (db *DB) EnsureNodeAliases(ctx context.Context, opts EnsureNodeAliases) (err error) {
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defer mon.Task()(&ctx)(&err)
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for _, node := range opts.Nodes {
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if node.IsZero() {
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return Error.New("tried to add alias to zero node")
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}
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}
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_, err = db.db.ExecContext(ctx, `
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INSERT INTO node_aliases(node_id)
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SELECT unnest($1::BYTEA[])
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ON CONFLICT DO NOTHING
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`, pgutil.NodeIDArray(opts.Nodes))
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if err != nil {
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return Error.Wrap(err)
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}
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return nil
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}
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// ListNodeAliases lists all node alias mappings.
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func (db *DB) ListNodeAliases(ctx context.Context) (_ []NodeAliasEntry, err error) {
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defer mon.Task()(&ctx)(&err)
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var aliases []NodeAliasEntry
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rows, err := db.db.Query(ctx, `
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SELECT node_id, node_alias
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FROM node_aliases
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`)
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if err != nil {
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return nil, Error.New("ListNodeAliases query: %w", err)
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}
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defer func() { err = errs.Combine(err, rows.Close()) }()
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for rows.Next() {
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var entry NodeAliasEntry
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err := rows.Scan(&entry.ID, &entry.Alias)
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if err != nil {
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return nil, Error.New("ListNodeAliases scan failed: %w", err)
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}
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aliases = append(aliases, entry)
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}
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if err := rows.Err(); err != nil {
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return nil, Error.New("ListNodeAliases scan failed: %w", err)
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}
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return aliases, nil
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}
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