tidb redirector 源码
tidb redirector 代码
文件路径：/store/mockstore/redirector.go
// Copyright 2021 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package mockstore
import (
"context"
"sync"
"time"
"github.com/pingcap/tidb/config"
"github.com/tikv/client-go/v2/tikv"
"github.com/tikv/client-go/v2/tikvrpc"
)
type clientRedirector struct {
mockClient tikv.Client
sync.Once
rpcClient tikv.Client
}
// newClientRedirector wraps a mock tikv client and redirects
// all TiDB requests using a rpcClient.
// It is a workaround for mock clients does not support TiDB
// RPC services.
func newClientRedirector(mockClient tikv.Client) tikv.Client {
return &clientRedirector{
mockClient: mockClient,
}
}
func (c *clientRedirector) Close() error {
err := c.mockClient.Close()
if err != nil {
return err
}
if c.rpcClient != nil {
err = c.rpcClient.Close()
}
return err
}
func (c *clientRedirector) CloseAddr(addr string) error {
err := c.mockClient.CloseAddr(addr)
if err != nil {
return err
}
if c.rpcClient != nil {
err = c.rpcClient.CloseAddr(addr)
}
return err
}
func (c *clientRedirector) SendRequest(ctx context.Context, addr string, req *tikvrpc.Request, timeout time.Duration) (*tikvrpc.Response, error) {
if req.StoreTp == tikvrpc.TiDB {
c.Once.Do(func() {
c.rpcClient = tikv.NewRPCClient(tikv.WithSecurity(config.GetGlobalConfig().Security.ClusterSecurity()))
})
return c.rpcClient.SendRequest(ctx, addr, req, timeout)
}
return c.mockClient.SendRequest(ctx, addr, req, timeout)
}
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