mirror of https://github.com/status-im/consul.git
77 lines
2.5 KiB
Go
77 lines
2.5 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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package inmem
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import (
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"context"
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"strconv"
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"sync/atomic"
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"google.golang.org/protobuf/proto"
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"github.com/hashicorp/consul/internal/storage"
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"github.com/hashicorp/consul/proto-public/pbresource"
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)
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// NewBackend returns a purely in-memory storage backend. It's suitable for
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// testing and development mode, but should NOT be used in production as it
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// has no support for durable persistence, so all of your data will be lost
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// when the process restarts or crashes.
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//
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// You must call Run before using the backend.
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func NewBackend() (*Backend, error) {
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store, err := NewStore()
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if err != nil {
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return nil, err
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}
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return &Backend{store: store}, nil
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}
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// Backend is a purely in-memory storage backend implementation.
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type Backend struct {
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vsn uint64
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store *Store
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}
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// Run until the given context is canceled. This method blocks, so should be
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// called in a goroutine.
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func (b *Backend) Run(ctx context.Context) { b.store.Run(ctx) }
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// Read implements the storage.Backend interface.
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func (b *Backend) Read(_ context.Context, _ storage.ReadConsistency, id *pbresource.ID) (*pbresource.Resource, error) {
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return b.store.Read(id)
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}
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// WriteCAS implements the storage.Backend interface.
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func (b *Backend) WriteCAS(_ context.Context, res *pbresource.Resource) (*pbresource.Resource, error) {
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stored := proto.Clone(res).(*pbresource.Resource)
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stored.Version = strconv.Itoa(int(atomic.AddUint64(&b.vsn, 1)))
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if err := b.store.WriteCAS(stored, res.Version); err != nil {
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return nil, err
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}
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return stored, nil
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}
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// DeleteCAS implements the storage.Backend interface.
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func (b *Backend) DeleteCAS(_ context.Context, id *pbresource.ID, version string) error {
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return b.store.DeleteCAS(id, version)
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}
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// List implements the storage.Backend interface.
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func (b *Backend) List(_ context.Context, _ storage.ReadConsistency, resType storage.UnversionedType, tenancy *pbresource.Tenancy, namePrefix string) ([]*pbresource.Resource, error) {
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return b.store.List(resType, tenancy, namePrefix)
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}
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// WatchList implements the storage.Backend interface.
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func (b *Backend) WatchList(_ context.Context, resType storage.UnversionedType, tenancy *pbresource.Tenancy, namePrefix string) (storage.Watch, error) {
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return b.store.WatchList(resType, tenancy, namePrefix)
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}
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// OwnerReferences implements the storage.Backend interface.
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func (b *Backend) OwnerReferences(_ context.Context, id *pbresource.ID) ([]*pbresource.ID, error) {
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return b.store.OwnerReferences(id)
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}
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