mirror of https://github.com/tikv/client-go.git
130 lines
3.5 KiB
Go
130 lines
3.5 KiB
Go
// Copyright 2019 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package proxy
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import (
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"sync"
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"github.com/pkg/errors"
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"github.com/tikv/client-go/config"
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"github.com/tikv/client-go/rawkv"
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)
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// RawKVProxy implements proxy to use rawkv API.
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// It is safe to copy by value or access concurrently.
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type RawKVProxy struct {
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clients *sync.Map
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}
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// NewRaw creates a RawKVProxy instance.
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func NewRaw() RawKVProxy {
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return RawKVProxy{
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clients: &sync.Map{},
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}
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}
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// New creates a new client and returns the client's UUID.
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func (p RawKVProxy) New(pdAddrs []string, security config.Security) (UUID, error) {
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client, err := rawkv.NewClient(pdAddrs, security)
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if err != nil {
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return "", err
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}
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return insertWithRetry(p.clients, client), nil
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}
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// Close releases a rawkv client.
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func (p RawKVProxy) Close(id UUID) error {
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client, ok := p.clients.Load(id)
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if !ok {
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return errors.WithStack(ErrClientNotFound)
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}
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if err := client.(*rawkv.Client).Close(); err != nil {
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return err
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}
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p.clients.Delete(id)
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return nil
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}
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// Get queries value with the key.
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func (p RawKVProxy) Get(id UUID, key []byte) ([]byte, error) {
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client, ok := p.clients.Load(id)
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if !ok {
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return nil, errors.WithStack(ErrClientNotFound)
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}
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return client.(*rawkv.Client).Get(key)
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}
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// BatchGet queries values with the keys.
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func (p RawKVProxy) BatchGet(id UUID, keys [][]byte) ([][]byte, error) {
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client, ok := p.clients.Load(id)
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if !ok {
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return nil, errors.WithStack(ErrClientNotFound)
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}
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return client.(*rawkv.Client).BatchGet(keys)
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}
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// Put stores a key-value pair to TiKV.
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func (p RawKVProxy) Put(id UUID, key, value []byte) error {
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client, ok := p.clients.Load(id)
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if !ok {
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return errors.WithStack(ErrClientNotFound)
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}
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return client.(*rawkv.Client).Put(key, value)
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}
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// BatchPut stores key-value pairs to TiKV.
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func (p RawKVProxy) BatchPut(id UUID, keys, values [][]byte) error {
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client, ok := p.clients.Load(id)
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if !ok {
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return errors.WithStack(ErrClientNotFound)
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}
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return client.(*rawkv.Client).BatchPut(keys, values)
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}
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// Delete deletes a key-value pair from TiKV.
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func (p RawKVProxy) Delete(id UUID, key []byte) error {
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client, ok := p.clients.Load(id)
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if !ok {
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return errors.WithStack(ErrClientNotFound)
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}
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return client.(*rawkv.Client).Delete(key)
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}
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// BatchDelete deletes key-value pairs from TiKV.
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func (p RawKVProxy) BatchDelete(id UUID, keys [][]byte) error {
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client, ok := p.clients.Load(id)
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if !ok {
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return errors.WithStack(ErrClientNotFound)
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}
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return client.(*rawkv.Client).BatchDelete(keys)
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}
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// DeleteRange deletes all key-value pairs in a range from TiKV.
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func (p RawKVProxy) DeleteRange(id UUID, startKey []byte, endKey []byte) error {
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client, ok := p.clients.Load(id)
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if !ok {
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return errors.WithStack(ErrClientNotFound)
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}
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return client.(*rawkv.Client).DeleteRange(startKey, endKey)
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}
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// Scan queries continuous kv pairs in range [startKey, endKey), up to limit pairs.
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func (p RawKVProxy) Scan(id UUID, startKey, endKey []byte, limit int) ([][]byte, [][]byte, error) {
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client, ok := p.clients.Load(id)
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if !ok {
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return nil, nil, errors.WithStack(ErrClientNotFound)
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}
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return client.(*rawkv.Client).Scan(startKey, endKey, limit)
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}
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