/
inmem_spanner_server.go
1078 lines (991 loc) · 33.4 KB
/
inmem_spanner_server.go
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// Copyright 2019 Google LLC
//
// 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
//
// https://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 testutil
import (
"bytes"
"context"
"encoding/binary"
"fmt"
"math/rand"
"sort"
"strings"
"sync"
"time"
"github.com/golang/protobuf/ptypes"
emptypb "github.com/golang/protobuf/ptypes/empty"
structpb "github.com/golang/protobuf/ptypes/struct"
"github.com/golang/protobuf/ptypes/timestamp"
"google.golang.org/genproto/googleapis/rpc/errdetails"
"google.golang.org/genproto/googleapis/rpc/status"
spannerpb "google.golang.org/genproto/googleapis/spanner/v1"
"google.golang.org/grpc/codes"
gstatus "google.golang.org/grpc/status"
)
var (
// KvMeta is the Metadata for mocked KV table.
KvMeta = spannerpb.ResultSetMetadata{
RowType: &spannerpb.StructType{
Fields: []*spannerpb.StructType_Field{
{
Name: "Key",
Type: &spannerpb.Type{Code: spannerpb.TypeCode_STRING},
},
{
Name: "Value",
Type: &spannerpb.Type{Code: spannerpb.TypeCode_STRING},
},
},
},
}
)
// StatementResultType indicates the type of result returned by a SQL
// statement.
type StatementResultType int
const (
// StatementResultError indicates that the sql statement returns an error.
StatementResultError StatementResultType = 0
// StatementResultResultSet indicates that the sql statement returns a
// result set.
StatementResultResultSet StatementResultType = 1
// StatementResultUpdateCount indicates that the sql statement returns an
// update count.
StatementResultUpdateCount StatementResultType = 2
// MaxRowsPerPartialResultSet is the maximum number of rows returned in
// each PartialResultSet. This number is deliberately set to a low value to
// ensure that most queries return more than one PartialResultSet.
MaxRowsPerPartialResultSet = 1
)
// The method names that can be used to register execution times and errors.
const (
MethodBeginTransaction string = "BEGIN_TRANSACTION"
MethodCommitTransaction string = "COMMIT_TRANSACTION"
MethodBatchCreateSession string = "BATCH_CREATE_SESSION"
MethodCreateSession string = "CREATE_SESSION"
MethodDeleteSession string = "DELETE_SESSION"
MethodGetSession string = "GET_SESSION"
MethodExecuteSql string = "EXECUTE_SQL"
MethodExecuteStreamingSql string = "EXECUTE_STREAMING_SQL"
MethodExecuteBatchDml string = "EXECUTE_BATCH_DML"
MethodStreamingRead string = "EXECUTE_STREAMING_READ"
)
// StatementResult represents a mocked result on the test server. The result is
// either of: a ResultSet, an update count or an error.
type StatementResult struct {
Type StatementResultType
Err error
ResultSet *spannerpb.ResultSet
UpdateCount int64
ResumeTokens [][]byte
}
// PartialResultSetExecutionTime represents execution times and errors that
// should be used when a PartialResult at the specified resume token is to
// be returned.
type PartialResultSetExecutionTime struct {
ResumeToken []byte
ExecutionTime time.Duration
Err error
}
// ToPartialResultSets converts a ResultSet to a PartialResultSet. This method
// is used to convert a mocked result to a PartialResultSet when one of the
// streaming methods are called.
func (s *StatementResult) ToPartialResultSets(resumeToken []byte) (result []*spannerpb.PartialResultSet, err error) {
var startIndex uint64
if len(resumeToken) > 0 {
if startIndex, err = DecodeResumeToken(resumeToken); err != nil {
return nil, err
}
}
totalRows := uint64(len(s.ResultSet.Rows))
if totalRows > 0 {
for {
rowCount := min(totalRows-startIndex, uint64(MaxRowsPerPartialResultSet))
rows := s.ResultSet.Rows[startIndex : startIndex+rowCount]
values := make([]*structpb.Value,
len(rows)*len(s.ResultSet.Metadata.RowType.Fields))
var idx int
for _, row := range rows {
for colIdx := range s.ResultSet.Metadata.RowType.Fields {
values[idx] = row.Values[colIdx]
idx++
}
}
var rt []byte
if len(s.ResumeTokens) == 0 {
rt = EncodeResumeToken(startIndex + rowCount)
} else {
rt = s.ResumeTokens[startIndex]
}
result = append(result, &spannerpb.PartialResultSet{
Metadata: s.ResultSet.Metadata,
Values: values,
ResumeToken: rt,
})
startIndex += rowCount
if startIndex == totalRows {
break
}
}
} else {
result = append(result, &spannerpb.PartialResultSet{
Metadata: s.ResultSet.Metadata,
})
}
return result, nil
}
func min(x, y uint64) uint64 {
if x > y {
return y
}
return x
}
func (s *StatementResult) updateCountToPartialResultSet(exact bool) *spannerpb.PartialResultSet {
return &spannerpb.PartialResultSet{
Stats: s.convertUpdateCountToResultSet(exact).Stats,
}
}
// Converts an update count to a ResultSet, as DML statements also return the
// update count as the statistics of a ResultSet.
func (s *StatementResult) convertUpdateCountToResultSet(exact bool) *spannerpb.ResultSet {
if exact {
return &spannerpb.ResultSet{
Stats: &spannerpb.ResultSetStats{
RowCount: &spannerpb.ResultSetStats_RowCountExact{
RowCountExact: s.UpdateCount,
},
},
}
}
return &spannerpb.ResultSet{
Stats: &spannerpb.ResultSetStats{
RowCount: &spannerpb.ResultSetStats_RowCountLowerBound{
RowCountLowerBound: s.UpdateCount,
},
},
}
}
// SimulatedExecutionTime represents the time the execution of a method
// should take, and any errors that should be returned by the method.
type SimulatedExecutionTime struct {
MinimumExecutionTime time.Duration
RandomExecutionTime time.Duration
Errors []error
// Keep error after execution. The error will continue to be returned until
// it is cleared.
KeepError bool
}
// InMemSpannerServer contains the SpannerServer interface plus a couple
// of specific methods for adding mocked results and resetting the server.
type InMemSpannerServer interface {
spannerpb.SpannerServer
// Stops this server.
Stop()
// Resets the in-mem server to its default state, deleting all sessions and
// transactions that have been created on the server. Mocked results are
// not deleted.
Reset()
// Sets an error that will be returned by the next server call. The server
// call will also automatically clear the error.
SetError(err error)
// Puts a mocked result on the server for a specific sql statement. The
// server does not parse the SQL string in any way, it is merely used as
// a key to the mocked result. The result will be used for all methods that
// expect a SQL statement, including (batch) DML methods.
PutStatementResult(sql string, result *StatementResult) error
// Puts a mocked result on the server for a specific partition token. The
// result will only be used for query requests that specify a partition
// token.
PutPartitionResult(partitionToken []byte, result *StatementResult) error
// Adds a PartialResultSetExecutionTime to the server that should be returned
// for the specified SQL string.
AddPartialResultSetError(sql string, err PartialResultSetExecutionTime)
// Removes a mocked result on the server for a specific sql statement.
RemoveStatementResult(sql string)
// Aborts the specified transaction . This method can be used to test
// transaction retry logic.
AbortTransaction(id []byte)
// Puts a simulated execution time for one of the Spanner methods.
PutExecutionTime(method string, executionTime SimulatedExecutionTime)
// Freeze stalls all requests.
Freeze()
// Unfreeze restores processing requests.
Unfreeze()
TotalSessionsCreated() uint
TotalSessionsDeleted() uint
SetMaxSessionsReturnedByServerPerBatchRequest(sessionCount int32)
SetMaxSessionsReturnedByServerInTotal(sessionCount int32)
ReceivedRequests() chan interface{}
DumpSessions() map[string]bool
ClearPings()
DumpPings() []string
}
type inMemSpannerServer struct {
// Embed for forward compatibility.
// Tests will keep working if more methods are added
// in the future.
spannerpb.SpannerServer
mu sync.Mutex
// Set to true when this server been stopped. This is the end state of a
// server, a stopped server cannot be restarted.
stopped bool
// If set, all calls return this error.
err error
// The mock server creates session IDs using this counter.
sessionCounter uint64
// The sessions that have been created on this mock server.
sessions map[string]*spannerpb.Session
// Last use times per session.
sessionLastUseTime map[string]time.Time
// The mock server creates transaction IDs per session using these
// counters.
transactionCounters map[string]*uint64
// The transactions that have been created on this mock server.
transactions map[string]*spannerpb.Transaction
// The transactions that have been (manually) aborted on the server.
abortedTransactions map[string]bool
// The transactions that are marked as PartitionedDMLTransaction
partitionedDmlTransactions map[string]bool
// The mocked results for this server.
statementResults map[string]*StatementResult
partitionResults map[string]*StatementResult
// The simulated execution times per method.
executionTimes map[string]*SimulatedExecutionTime
// The simulated errors for partial result sets
partialResultSetErrors map[string][]*PartialResultSetExecutionTime
totalSessionsCreated uint
totalSessionsDeleted uint
// The maximum number of sessions that will be created per batch request.
maxSessionsReturnedByServerPerBatchRequest int32
maxSessionsReturnedByServerInTotal int32
receivedRequests chan interface{}
// Session ping history.
pings []string
// Server will stall on any requests.
freezed chan struct{}
}
// NewInMemSpannerServer creates a new in-mem test server.
func NewInMemSpannerServer() InMemSpannerServer {
res := &inMemSpannerServer{}
res.initDefaults()
res.statementResults = make(map[string]*StatementResult)
res.partitionResults = make(map[string]*StatementResult)
res.executionTimes = make(map[string]*SimulatedExecutionTime)
res.partialResultSetErrors = make(map[string][]*PartialResultSetExecutionTime)
res.receivedRequests = make(chan interface{}, 1000000)
// Produce a closed channel, so the default action of ready is to not block.
res.Freeze()
res.Unfreeze()
return res
}
func (s *inMemSpannerServer) Stop() {
s.mu.Lock()
defer s.mu.Unlock()
s.stopped = true
close(s.receivedRequests)
}
// Resets the test server to its initial state, deleting all sessions and
// transactions that have been created on the server. This method will not
// remove mocked results.
func (s *inMemSpannerServer) Reset() {
s.mu.Lock()
defer s.mu.Unlock()
close(s.receivedRequests)
s.receivedRequests = make(chan interface{}, 1000000)
s.initDefaults()
}
func (s *inMemSpannerServer) SetError(err error) {
s.mu.Lock()
defer s.mu.Unlock()
s.err = err
}
// Registers a mocked result for a SQL statement on the server.
func (s *inMemSpannerServer) PutStatementResult(sql string, result *StatementResult) error {
s.mu.Lock()
defer s.mu.Unlock()
s.statementResults[sql] = result
return nil
}
func (s *inMemSpannerServer) RemoveStatementResult(sql string) {
s.mu.Lock()
defer s.mu.Unlock()
delete(s.statementResults, sql)
}
// Registers a mocked result for a partition token on the server.
func (s *inMemSpannerServer) PutPartitionResult(partitionToken []byte, result *StatementResult) error {
tokenString := string(partitionToken)
s.mu.Lock()
defer s.mu.Unlock()
s.partitionResults[tokenString] = result
return nil
}
func (s *inMemSpannerServer) AbortTransaction(id []byte) {
s.mu.Lock()
defer s.mu.Unlock()
s.abortedTransactions[string(id)] = true
}
func (s *inMemSpannerServer) PutExecutionTime(method string, executionTime SimulatedExecutionTime) {
s.mu.Lock()
defer s.mu.Unlock()
s.executionTimes[method] = &executionTime
}
func (s *inMemSpannerServer) AddPartialResultSetError(sql string, partialResultSetError PartialResultSetExecutionTime) {
s.mu.Lock()
defer s.mu.Unlock()
s.partialResultSetErrors[sql] = append(s.partialResultSetErrors[sql], &partialResultSetError)
}
// Freeze stalls all requests.
func (s *inMemSpannerServer) Freeze() {
s.mu.Lock()
defer s.mu.Unlock()
s.freezed = make(chan struct{})
}
// Unfreeze restores processing requests.
func (s *inMemSpannerServer) Unfreeze() {
s.mu.Lock()
defer s.mu.Unlock()
close(s.freezed)
}
// ready checks conditions before executing requests
func (s *inMemSpannerServer) ready() {
s.mu.Lock()
freezed := s.freezed
s.mu.Unlock()
// check if server should be freezed
<-freezed
}
func (s *inMemSpannerServer) TotalSessionsCreated() uint {
s.mu.Lock()
defer s.mu.Unlock()
return s.totalSessionsCreated
}
func (s *inMemSpannerServer) TotalSessionsDeleted() uint {
s.mu.Lock()
defer s.mu.Unlock()
return s.totalSessionsDeleted
}
func (s *inMemSpannerServer) SetMaxSessionsReturnedByServerPerBatchRequest(sessionCount int32) {
s.mu.Lock()
defer s.mu.Unlock()
s.maxSessionsReturnedByServerPerBatchRequest = sessionCount
}
func (s *inMemSpannerServer) SetMaxSessionsReturnedByServerInTotal(sessionCount int32) {
s.mu.Lock()
defer s.mu.Unlock()
s.maxSessionsReturnedByServerInTotal = sessionCount
}
func (s *inMemSpannerServer) ReceivedRequests() chan interface{} {
return s.receivedRequests
}
// ClearPings clears the ping history from the server.
func (s *inMemSpannerServer) ClearPings() {
s.mu.Lock()
defer s.mu.Unlock()
s.pings = nil
}
// DumpPings dumps the ping history.
func (s *inMemSpannerServer) DumpPings() []string {
s.mu.Lock()
defer s.mu.Unlock()
return append([]string(nil), s.pings...)
}
// DumpSessions dumps the internal session table.
func (s *inMemSpannerServer) DumpSessions() map[string]bool {
s.mu.Lock()
defer s.mu.Unlock()
st := map[string]bool{}
for s := range s.sessions {
st[s] = true
}
return st
}
func (s *inMemSpannerServer) initDefaults() {
s.sessionCounter = 0
s.maxSessionsReturnedByServerPerBatchRequest = 100
s.sessions = make(map[string]*spannerpb.Session)
s.sessionLastUseTime = make(map[string]time.Time)
s.transactions = make(map[string]*spannerpb.Transaction)
s.abortedTransactions = make(map[string]bool)
s.partitionedDmlTransactions = make(map[string]bool)
s.transactionCounters = make(map[string]*uint64)
}
func (s *inMemSpannerServer) generateSessionNameLocked(database string) string {
s.sessionCounter++
return fmt.Sprintf("%s/sessions/%d", database, s.sessionCounter)
}
func (s *inMemSpannerServer) findSession(name string) (*spannerpb.Session, error) {
s.mu.Lock()
defer s.mu.Unlock()
session := s.sessions[name]
if session == nil {
return nil, newSessionNotFoundError(name)
}
return session, nil
}
// sessionResourceType is the type name of Spanner sessions.
const sessionResourceType = "type.googleapis.com/google.spanner.v1.Session"
func newSessionNotFoundError(name string) error {
s := gstatus.Newf(codes.NotFound, "Session not found: Session with id %s not found", name)
s, _ = s.WithDetails(&errdetails.ResourceInfo{ResourceType: sessionResourceType, ResourceName: name})
return s.Err()
}
func (s *inMemSpannerServer) updateSessionLastUseTime(session string) {
s.mu.Lock()
defer s.mu.Unlock()
s.sessionLastUseTime[session] = time.Now()
}
func getCurrentTimestamp() *timestamp.Timestamp {
t := time.Now()
return ×tamp.Timestamp{Seconds: t.Unix(), Nanos: int32(t.Nanosecond())}
}
// Gets the transaction id from the transaction selector. If the selector
// specifies that a new transaction should be started, this method will start
// a new transaction and return the id of that transaction.
func (s *inMemSpannerServer) getTransactionID(session *spannerpb.Session, txSelector *spannerpb.TransactionSelector) []byte {
var res []byte
if txSelector.GetBegin() != nil {
// Start a new transaction.
res = s.beginTransaction(session, txSelector.GetBegin()).Id
} else if txSelector.GetId() != nil {
res = txSelector.GetId()
}
return res
}
func (s *inMemSpannerServer) generateTransactionName(session string) string {
s.mu.Lock()
defer s.mu.Unlock()
counter, ok := s.transactionCounters[session]
if !ok {
counter = new(uint64)
s.transactionCounters[session] = counter
}
*counter++
return fmt.Sprintf("%s/transactions/%d", session, *counter)
}
func (s *inMemSpannerServer) beginTransaction(session *spannerpb.Session, options *spannerpb.TransactionOptions) *spannerpb.Transaction {
id := s.generateTransactionName(session.Name)
res := &spannerpb.Transaction{
Id: []byte(id),
ReadTimestamp: getCurrentTimestamp(),
}
s.mu.Lock()
s.transactions[id] = res
s.partitionedDmlTransactions[id] = options.GetPartitionedDml() != nil
s.mu.Unlock()
return res
}
func (s *inMemSpannerServer) getTransactionByID(id []byte) (*spannerpb.Transaction, error) {
s.mu.Lock()
defer s.mu.Unlock()
tx, ok := s.transactions[string(id)]
if !ok {
return nil, gstatus.Error(codes.NotFound, "Transaction not found")
}
aborted, ok := s.abortedTransactions[string(id)]
if ok && aborted {
return nil, newAbortedErrorWithMinimalRetryDelay()
}
return tx, nil
}
func newAbortedErrorWithMinimalRetryDelay() error {
st := gstatus.New(codes.Aborted, "Transaction has been aborted")
retry := &errdetails.RetryInfo{
RetryDelay: ptypes.DurationProto(time.Nanosecond),
}
st, _ = st.WithDetails(retry)
return st.Err()
}
func (s *inMemSpannerServer) removeTransaction(tx *spannerpb.Transaction) {
s.mu.Lock()
defer s.mu.Unlock()
delete(s.transactions, string(tx.Id))
delete(s.partitionedDmlTransactions, string(tx.Id))
}
func (s *inMemSpannerServer) getPartitionResult(partitionToken []byte) (*StatementResult, error) {
tokenString := string(partitionToken)
s.mu.Lock()
defer s.mu.Unlock()
result, ok := s.partitionResults[tokenString]
if !ok {
return nil, gstatus.Error(codes.Internal, fmt.Sprintf("No result found for partition token %v", tokenString))
}
return result, nil
}
func (s *inMemSpannerServer) getStatementResult(sql string) (*StatementResult, error) {
s.mu.Lock()
defer s.mu.Unlock()
result, ok := s.statementResults[sql]
if !ok {
return nil, gstatus.Error(codes.Internal, fmt.Sprintf("No result found for statement %v", sql))
}
return result, nil
}
func (s *inMemSpannerServer) simulateExecutionTime(method string, req interface{}) error {
s.mu.Lock()
if s.stopped {
s.mu.Unlock()
return gstatus.Error(codes.Unavailable, "server has been stopped")
}
s.receivedRequests <- req
s.mu.Unlock()
s.ready()
s.mu.Lock()
if s.err != nil {
err := s.err
s.err = nil
s.mu.Unlock()
return err
}
executionTime, ok := s.executionTimes[method]
s.mu.Unlock()
if ok {
var randTime int64
if executionTime.RandomExecutionTime > 0 {
randTime = rand.Int63n(int64(executionTime.RandomExecutionTime))
}
totalExecutionTime := time.Duration(int64(executionTime.MinimumExecutionTime) + randTime)
<-time.After(totalExecutionTime)
s.mu.Lock()
if executionTime.Errors != nil && len(executionTime.Errors) > 0 {
err := executionTime.Errors[0]
if !executionTime.KeepError {
executionTime.Errors = executionTime.Errors[1:]
}
s.mu.Unlock()
return err
}
s.mu.Unlock()
}
return nil
}
func (s *inMemSpannerServer) CreateSession(ctx context.Context, req *spannerpb.CreateSessionRequest) (*spannerpb.Session, error) {
if err := s.simulateExecutionTime(MethodCreateSession, req); err != nil {
return nil, err
}
if req.Database == "" {
return nil, gstatus.Error(codes.InvalidArgument, "Missing database")
}
s.mu.Lock()
defer s.mu.Unlock()
if s.maxSessionsReturnedByServerInTotal > int32(0) && int32(len(s.sessions)) == s.maxSessionsReturnedByServerInTotal {
return nil, gstatus.Error(codes.ResourceExhausted, "No more sessions available")
}
sessionName := s.generateSessionNameLocked(req.Database)
ts := getCurrentTimestamp()
session := &spannerpb.Session{Name: sessionName, CreateTime: ts, ApproximateLastUseTime: ts}
s.totalSessionsCreated++
s.sessions[sessionName] = session
return session, nil
}
func (s *inMemSpannerServer) BatchCreateSessions(ctx context.Context, req *spannerpb.BatchCreateSessionsRequest) (*spannerpb.BatchCreateSessionsResponse, error) {
if err := s.simulateExecutionTime(MethodBatchCreateSession, req); err != nil {
return nil, err
}
if req.Database == "" {
return nil, gstatus.Error(codes.InvalidArgument, "Missing database")
}
if req.SessionCount <= 0 {
return nil, gstatus.Error(codes.InvalidArgument, "Session count must be >= 0")
}
sessionsToCreate := req.SessionCount
s.mu.Lock()
defer s.mu.Unlock()
if s.maxSessionsReturnedByServerInTotal > int32(0) && int32(len(s.sessions)) >= s.maxSessionsReturnedByServerInTotal {
return nil, gstatus.Error(codes.ResourceExhausted, "No more sessions available")
}
if sessionsToCreate > s.maxSessionsReturnedByServerPerBatchRequest {
sessionsToCreate = s.maxSessionsReturnedByServerPerBatchRequest
}
if s.maxSessionsReturnedByServerInTotal > int32(0) && (sessionsToCreate+int32(len(s.sessions))) > s.maxSessionsReturnedByServerInTotal {
sessionsToCreate = s.maxSessionsReturnedByServerInTotal - int32(len(s.sessions))
}
sessions := make([]*spannerpb.Session, sessionsToCreate)
for i := int32(0); i < sessionsToCreate; i++ {
sessionName := s.generateSessionNameLocked(req.Database)
ts := getCurrentTimestamp()
sessions[i] = &spannerpb.Session{Name: sessionName, CreateTime: ts, ApproximateLastUseTime: ts}
s.totalSessionsCreated++
s.sessions[sessionName] = sessions[i]
}
return &spannerpb.BatchCreateSessionsResponse{Session: sessions}, nil
}
func (s *inMemSpannerServer) GetSession(ctx context.Context, req *spannerpb.GetSessionRequest) (*spannerpb.Session, error) {
if err := s.simulateExecutionTime(MethodGetSession, req); err != nil {
return nil, err
}
if req.Name == "" {
return nil, gstatus.Error(codes.InvalidArgument, "Missing session name")
}
session, err := s.findSession(req.Name)
if err != nil {
return nil, err
}
return session, nil
}
func (s *inMemSpannerServer) ListSessions(ctx context.Context, req *spannerpb.ListSessionsRequest) (*spannerpb.ListSessionsResponse, error) {
s.mu.Lock()
if s.stopped {
s.mu.Unlock()
return nil, gstatus.Error(codes.Unavailable, "server has been stopped")
}
s.receivedRequests <- req
s.mu.Unlock()
if req.Database == "" {
return nil, gstatus.Error(codes.InvalidArgument, "Missing database")
}
expectedSessionName := req.Database + "/sessions/"
var sessions []*spannerpb.Session
s.mu.Lock()
for _, session := range s.sessions {
if strings.Index(session.Name, expectedSessionName) == 0 {
sessions = append(sessions, session)
}
}
s.mu.Unlock()
sort.Slice(sessions[:], func(i, j int) bool {
return sessions[i].Name < sessions[j].Name
})
res := &spannerpb.ListSessionsResponse{Sessions: sessions}
return res, nil
}
func (s *inMemSpannerServer) DeleteSession(ctx context.Context, req *spannerpb.DeleteSessionRequest) (*emptypb.Empty, error) {
if err := s.simulateExecutionTime(MethodDeleteSession, req); err != nil {
return nil, err
}
if req.Name == "" {
return nil, gstatus.Error(codes.InvalidArgument, "Missing session name")
}
if _, err := s.findSession(req.Name); err != nil {
return nil, err
}
s.mu.Lock()
defer s.mu.Unlock()
s.totalSessionsDeleted++
delete(s.sessions, req.Name)
return &emptypb.Empty{}, nil
}
func (s *inMemSpannerServer) ExecuteSql(ctx context.Context, req *spannerpb.ExecuteSqlRequest) (*spannerpb.ResultSet, error) {
if err := s.simulateExecutionTime(MethodExecuteSql, req); err != nil {
return nil, err
}
if req.Sql == "SELECT 1" {
s.mu.Lock()
s.pings = append(s.pings, req.Session)
s.mu.Unlock()
}
if req.Session == "" {
return nil, gstatus.Error(codes.InvalidArgument, "Missing session name")
}
session, err := s.findSession(req.Session)
if err != nil {
return nil, err
}
var id []byte
s.updateSessionLastUseTime(session.Name)
if id = s.getTransactionID(session, req.Transaction); id != nil {
_, err = s.getTransactionByID(id)
if err != nil {
return nil, err
}
}
var statementResult *StatementResult
if req.PartitionToken != nil {
statementResult, err = s.getPartitionResult(req.PartitionToken)
} else {
statementResult, err = s.getStatementResult(req.Sql)
}
if err != nil {
return nil, err
}
s.mu.Lock()
isPartitionedDml := s.partitionedDmlTransactions[string(id)]
s.mu.Unlock()
switch statementResult.Type {
case StatementResultError:
return nil, statementResult.Err
case StatementResultResultSet:
return statementResult.ResultSet, nil
case StatementResultUpdateCount:
return statementResult.convertUpdateCountToResultSet(!isPartitionedDml), nil
}
return nil, gstatus.Error(codes.Internal, "Unknown result type")
}
func (s *inMemSpannerServer) ExecuteStreamingSql(req *spannerpb.ExecuteSqlRequest, stream spannerpb.Spanner_ExecuteStreamingSqlServer) error {
if err := s.simulateExecutionTime(MethodExecuteStreamingSql, req); err != nil {
return err
}
return s.executeStreamingSQL(req, stream)
}
func (s *inMemSpannerServer) executeStreamingSQL(req *spannerpb.ExecuteSqlRequest, stream spannerpb.Spanner_ExecuteStreamingSqlServer) error {
if req.Session == "" {
return gstatus.Error(codes.InvalidArgument, "Missing session name")
}
session, err := s.findSession(req.Session)
if err != nil {
return err
}
s.updateSessionLastUseTime(session.Name)
var id []byte
if id = s.getTransactionID(session, req.Transaction); id != nil {
_, err = s.getTransactionByID(id)
if err != nil {
return err
}
}
var statementResult *StatementResult
if req.PartitionToken != nil {
statementResult, err = s.getPartitionResult(req.PartitionToken)
} else {
statementResult, err = s.getStatementResult(req.Sql)
}
if err != nil {
return err
}
s.mu.Lock()
isPartitionedDml := s.partitionedDmlTransactions[string(id)]
s.mu.Unlock()
switch statementResult.Type {
case StatementResultError:
return statementResult.Err
case StatementResultResultSet:
parts, err := statementResult.ToPartialResultSets(req.ResumeToken)
if err != nil {
return err
}
var nextPartialResultSetError *PartialResultSetExecutionTime
s.mu.Lock()
pErrors := s.partialResultSetErrors[req.Sql]
if len(pErrors) > 0 {
nextPartialResultSetError = pErrors[0]
s.partialResultSetErrors[req.Sql] = pErrors[1:]
}
s.mu.Unlock()
for _, part := range parts {
if nextPartialResultSetError != nil && bytes.Equal(part.ResumeToken, nextPartialResultSetError.ResumeToken) {
if nextPartialResultSetError.ExecutionTime > 0 {
<-time.After(nextPartialResultSetError.ExecutionTime)
}
if nextPartialResultSetError.Err != nil {
return nextPartialResultSetError.Err
}
}
if err := stream.Send(part); err != nil {
return err
}
}
return nil
case StatementResultUpdateCount:
part := statementResult.updateCountToPartialResultSet(!isPartitionedDml)
if err := stream.Send(part); err != nil {
return err
}
return nil
}
return gstatus.Error(codes.Internal, "Unknown result type")
}
func (s *inMemSpannerServer) ExecuteBatchDml(ctx context.Context, req *spannerpb.ExecuteBatchDmlRequest) (*spannerpb.ExecuteBatchDmlResponse, error) {
if err := s.simulateExecutionTime(MethodExecuteBatchDml, req); err != nil {
return nil, err
}
if req.Session == "" {
return nil, gstatus.Error(codes.InvalidArgument, "Missing session name")
}
session, err := s.findSession(req.Session)
if err != nil {
return nil, err
}
s.updateSessionLastUseTime(session.Name)
var id []byte
if id = s.getTransactionID(session, req.Transaction); id != nil {
_, err = s.getTransactionByID(id)
if err != nil {
return nil, err
}
}
s.mu.Lock()
isPartitionedDml := s.partitionedDmlTransactions[string(id)]
s.mu.Unlock()
resp := &spannerpb.ExecuteBatchDmlResponse{}
resp.ResultSets = make([]*spannerpb.ResultSet, len(req.Statements))
resp.Status = &status.Status{Code: int32(codes.OK)}
for idx, batchStatement := range req.Statements {
statementResult, err := s.getStatementResult(batchStatement.Sql)
if err != nil {
return nil, err
}
switch statementResult.Type {
case StatementResultError:
resp.Status = &status.Status{Code: int32(gstatus.Code(statementResult.Err)), Message: statementResult.Err.Error()}
resp.ResultSets = resp.ResultSets[:idx]
return resp, nil
case StatementResultResultSet:
return nil, gstatus.Error(codes.InvalidArgument, fmt.Sprintf("Not an update statement: %v", batchStatement.Sql))
case StatementResultUpdateCount:
resp.ResultSets[idx] = statementResult.convertUpdateCountToResultSet(!isPartitionedDml)
}
}
return resp, nil
}
func (s *inMemSpannerServer) Read(ctx context.Context, req *spannerpb.ReadRequest) (*spannerpb.ResultSet, error) {
s.mu.Lock()
if s.stopped {
s.mu.Unlock()
return nil, gstatus.Error(codes.Unavailable, "server has been stopped")
}
s.receivedRequests <- req
s.mu.Unlock()
return nil, gstatus.Error(codes.Unimplemented, "Method not yet implemented")
}
func (s *inMemSpannerServer) StreamingRead(req *spannerpb.ReadRequest, stream spannerpb.Spanner_StreamingReadServer) error {
if err := s.simulateExecutionTime(MethodStreamingRead, req); err != nil {
return err
}
sqlReq := &spannerpb.ExecuteSqlRequest{
Session: req.Session,
Transaction: req.Transaction,
PartitionToken: req.PartitionToken,
ResumeToken: req.ResumeToken,
// KeySet is currently ignored.
Sql: fmt.Sprintf(
"SELECT %s FROM %s",
strings.Join(req.Columns, ", "),
req.Table,
),
}
return s.executeStreamingSQL(sqlReq, stream)
}
func (s *inMemSpannerServer) BeginTransaction(ctx context.Context, req *spannerpb.BeginTransactionRequest) (*spannerpb.Transaction, error) {
if err := s.simulateExecutionTime(MethodBeginTransaction, req); err != nil {
return nil, err
}
if req.Session == "" {
return nil, gstatus.Error(codes.InvalidArgument, "Missing session name")
}
session, err := s.findSession(req.Session)
if err != nil {
return nil, err
}
s.updateSessionLastUseTime(session.Name)
tx := s.beginTransaction(session, req.Options)
return tx, nil
}
func (s *inMemSpannerServer) Commit(ctx context.Context, req *spannerpb.CommitRequest) (*spannerpb.CommitResponse, error) {
if err := s.simulateExecutionTime(MethodCommitTransaction, req); err != nil {
return nil, err
}
if req.Session == "" {
return nil, gstatus.Error(codes.InvalidArgument, "Missing session name")
}
session, err := s.findSession(req.Session)
if err != nil {
return nil, err
}
s.updateSessionLastUseTime(session.Name)
var tx *spannerpb.Transaction
if req.GetSingleUseTransaction() != nil {
tx = s.beginTransaction(session, req.GetSingleUseTransaction())
} else if req.GetTransactionId() != nil {
tx, err = s.getTransactionByID(req.GetTransactionId())
if err != nil {
return nil, err
}
} else {
return nil, gstatus.Error(codes.InvalidArgument, "Missing transaction in commit request")
}
s.removeTransaction(tx)
return &spannerpb.CommitResponse{CommitTimestamp: getCurrentTimestamp()}, nil
}
func (s *inMemSpannerServer) Rollback(ctx context.Context, req *spannerpb.RollbackRequest) (*emptypb.Empty, error) {
s.mu.Lock()
if s.stopped {
s.mu.Unlock()
return nil, gstatus.Error(codes.Unavailable, "server has been stopped")
}
s.receivedRequests <- req
s.mu.Unlock()
if req.Session == "" {
return nil, gstatus.Error(codes.InvalidArgument, "Missing session name")
}