vitess.io/vitess@v0.16.2/go/cmd/vtgateclienttest/services/terminal.go (about)

     1  /*
     2  Copyright 2019 The Vitess Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package services
    18  
    19  import (
    20  	"errors"
    21  	"fmt"
    22  
    23  	"context"
    24  
    25  	"vitess.io/vitess/go/sqltypes"
    26  	"vitess.io/vitess/go/tb"
    27  	"vitess.io/vitess/go/vt/log"
    28  
    29  	binlogdatapb "vitess.io/vitess/go/vt/proto/binlogdata"
    30  	querypb "vitess.io/vitess/go/vt/proto/query"
    31  	topodatapb "vitess.io/vitess/go/vt/proto/topodata"
    32  	vtgatepb "vitess.io/vitess/go/vt/proto/vtgate"
    33  )
    34  
    35  var errTerminal = errors.New("vtgate test client, errTerminal")
    36  
    37  // terminalClient implements vtgateservice.VTGateService.
    38  // It is the last client in the chain, and returns a well known error.
    39  type terminalClient struct{}
    40  
    41  func newTerminalClient() *terminalClient {
    42  	return &terminalClient{}
    43  }
    44  
    45  func (c *terminalClient) Execute(ctx context.Context, session *vtgatepb.Session, sql string, bindVariables map[string]*querypb.BindVariable) (*vtgatepb.Session, *sqltypes.Result, error) {
    46  	if sql == "quit://" {
    47  		log.Fatal("Received quit:// query. Going down.")
    48  	}
    49  	return session, nil, errTerminal
    50  }
    51  
    52  func (c *terminalClient) ExecuteBatch(ctx context.Context, session *vtgatepb.Session, sqlList []string, bindVariablesList []map[string]*querypb.BindVariable) (*vtgatepb.Session, []sqltypes.QueryResponse, error) {
    53  	if len(sqlList) == 1 {
    54  		if sqlList[0] == "quit://" {
    55  			log.Fatal("Received quit:// query. Going down.")
    56  		}
    57  	}
    58  	return session, nil, errTerminal
    59  }
    60  
    61  func (c *terminalClient) StreamExecute(ctx context.Context, session *vtgatepb.Session, sql string, bindVariables map[string]*querypb.BindVariable, callback func(*sqltypes.Result) error) error {
    62  	return errTerminal
    63  }
    64  
    65  func (c *terminalClient) Prepare(ctx context.Context, session *vtgatepb.Session, sql string, bindVariables map[string]*querypb.BindVariable) (*vtgatepb.Session, []*querypb.Field, error) {
    66  	return session, nil, errTerminal
    67  }
    68  
    69  func (c *terminalClient) CloseSession(ctx context.Context, session *vtgatepb.Session) error {
    70  	return errTerminal
    71  }
    72  
    73  func (c *terminalClient) ResolveTransaction(ctx context.Context, dtid string) error {
    74  	return errTerminal
    75  }
    76  
    77  func (c *terminalClient) VStream(ctx context.Context, tabletType topodatapb.TabletType, vgtid *binlogdatapb.VGtid, filter *binlogdatapb.Filter, flags *vtgatepb.VStreamFlags, send func([]*binlogdatapb.VEvent) error) error {
    78  	return errTerminal
    79  }
    80  
    81  func (c *terminalClient) HandlePanic(err *error) {
    82  	if x := recover(); x != nil {
    83  		log.Errorf("Uncaught panic:\n%v\n%s", x, tb.Stack(4))
    84  		*err = fmt.Errorf("uncaught panic: %v", x)
    85  	}
    86  }