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)
}