/* Copyright 2016 Google Inc. All Rights Reserved. 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 bigtable import ( "reflect" "strings" "testing" "time" "cloud.google.com/go/bigtable/bttest" "github.com/golang/protobuf/ptypes/wrappers" "golang.org/x/net/context" "google.golang.org/api/option" btpb "google.golang.org/genproto/googleapis/bigtable/v2" rpcpb "google.golang.org/genproto/googleapis/rpc/status" "google.golang.org/grpc" "google.golang.org/grpc/codes" ) func setupFakeServer(opt ...grpc.ServerOption) (tbl *Table, cleanup func(), err error) { srv, err := bttest.NewServer("127.0.0.1:0", opt...) if err != nil { return nil, nil, err } conn, err := grpc.Dial(srv.Addr, grpc.WithInsecure()) if err != nil { return nil, nil, err } client, err := NewClient(context.Background(), "client", "instance", option.WithGRPCConn(conn)) if err != nil { return nil, nil, err } adminClient, err := NewAdminClient(context.Background(), "client", "instance", option.WithGRPCConn(conn)) if err != nil { return nil, nil, err } if err := adminClient.CreateTable(context.Background(), "table"); err != nil { return nil, nil, err } if err := adminClient.CreateColumnFamily(context.Background(), "table", "cf"); err != nil { return nil, nil, err } t := client.Open("table") cleanupFunc := func() { adminClient.Close() client.Close() srv.Close() } return t, cleanupFunc, nil } func TestRetryApply(t *testing.T) { ctx := context.Background() errCount := 0 code := codes.Unavailable // Will be retried // Intercept requests and return an error or defer to the underlying handler errInjector := func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) { if strings.HasSuffix(info.FullMethod, "MutateRow") && errCount < 3 { errCount++ return nil, grpc.Errorf(code, "") } return handler(ctx, req) } tbl, cleanup, err := setupFakeServer(grpc.UnaryInterceptor(errInjector)) defer cleanup() if err != nil { t.Fatalf("fake server setup: %v", err) } mut := NewMutation() mut.Set("cf", "col", 1, []byte("val")) if err := tbl.Apply(ctx, "row1", mut); err != nil { t.Errorf("applying single mutation with retries: %v", err) } row, err := tbl.ReadRow(ctx, "row1") if err != nil { t.Errorf("reading single value with retries: %v", err) } if row == nil { t.Errorf("applying single mutation with retries: could not read back row") } code = codes.FailedPrecondition // Won't be retried errCount = 0 if err := tbl.Apply(ctx, "row", mut); err == nil { t.Errorf("applying single mutation with no retries: no error") } // Check and mutate mutTrue := NewMutation() mutTrue.DeleteRow() mutFalse := NewMutation() mutFalse.Set("cf", "col", 1, []byte("val")) condMut := NewCondMutation(ValueFilter("."), mutTrue, mutFalse) errCount = 0 code = codes.Unavailable // Will be retried if err := tbl.Apply(ctx, "row1", condMut); err != nil { t.Errorf("conditionally mutating row with retries: %v", err) } row, err = tbl.ReadRow(ctx, "row1") // row1 already in the table if err != nil { t.Errorf("reading single value after conditional mutation: %v", err) } if row != nil { t.Errorf("reading single value after conditional mutation: row not deleted") } errCount = 0 code = codes.FailedPrecondition // Won't be retried if err := tbl.Apply(ctx, "row", condMut); err == nil { t.Errorf("conditionally mutating row with no retries: no error") } } func TestRetryApplyBulk(t *testing.T) { ctx := context.Background() // Intercept requests and delegate to an interceptor defined by the test case errCount := 0 var f func(grpc.ServerStream) error errInjector := func(srv interface{}, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error { if strings.HasSuffix(info.FullMethod, "MutateRows") { return f(ss) } return handler(ctx, ss) } tbl, cleanup, err := setupFakeServer(grpc.StreamInterceptor(errInjector)) defer cleanup() if err != nil { t.Fatalf("fake server setup: %v", err) } errCount = 0 // Test overall request failure and retries f = func(ss grpc.ServerStream) error { if errCount < 3 { errCount++ return grpc.Errorf(codes.Aborted, "") } return nil } mut := NewMutation() mut.Set("cf", "col", 1, []byte{}) errors, err := tbl.ApplyBulk(ctx, []string{"row2"}, []*Mutation{mut}) if errors != nil || err != nil { t.Errorf("bulk with request failure: got: %v, %v, want: nil", errors, err) } // Test failures and retries in one request errCount = 0 m1 := NewMutation() m1.Set("cf", "col", 1, []byte{}) m2 := NewMutation() m2.Set("cf", "col2", 1, []byte{}) m3 := NewMutation() m3.Set("cf", "col3", 1, []byte{}) f = func(ss grpc.ServerStream) error { var err error req := new(btpb.MutateRowsRequest) ss.RecvMsg(req) switch errCount { case 0: // Retryable request failure err = grpc.Errorf(codes.Unavailable, "") case 1: // Two mutations fail writeMutateRowsResponse(ss, codes.Unavailable, codes.OK, codes.Aborted) err = nil case 2: // Two failures were retried. One will succeed. if want, got := 2, len(req.Entries); want != got { t.Errorf("2 bulk retries, got: %d, want %d", got, want) } writeMutateRowsResponse(ss, codes.OK, codes.Aborted) err = nil case 3: // One failure was retried and will succeed. if want, got := 1, len(req.Entries); want != got { t.Errorf("1 bulk retry, got: %d, want %d", got, want) } writeMutateRowsResponse(ss, codes.OK) err = nil } errCount++ return err } errors, err = tbl.ApplyBulk(ctx, []string{"row1", "row2", "row3"}, []*Mutation{m1, m2, m3}) if errors != nil || err != nil { t.Errorf("bulk with retries: got: %v, %v, want: nil", errors, err) } // Test unretryable errors niMut := NewMutation() niMut.Set("cf", "col", ServerTime, []byte{}) // Non-idempotent errCount = 0 f = func(ss grpc.ServerStream) error { var err error req := new(btpb.MutateRowsRequest) ss.RecvMsg(req) switch errCount { case 0: // Give non-idempotent mutation a retryable error code. // Nothing should be retried. writeMutateRowsResponse(ss, codes.FailedPrecondition, codes.Aborted) err = nil case 1: t.Errorf("unretryable errors: got one retry, want no retries") } errCount++ return err } errors, err = tbl.ApplyBulk(ctx, []string{"row1", "row2"}, []*Mutation{m1, niMut}) if err != nil { t.Errorf("unretryable errors: request failed %v") } want := []error{ grpc.Errorf(codes.FailedPrecondition, ""), grpc.Errorf(codes.Aborted, ""), } if !reflect.DeepEqual(want, errors) { t.Errorf("unretryable errors: got: %v, want: %v", errors, want) } // Test individual errors and a deadline exceeded f = func(ss grpc.ServerStream) error { writeMutateRowsResponse(ss, codes.FailedPrecondition, codes.OK, codes.Aborted) return nil } ctx, _ = context.WithTimeout(ctx, 100*time.Millisecond) errors, err = tbl.ApplyBulk(ctx, []string{"row1", "row2", "row3"}, []*Mutation{m1, m2, m3}) wantErr := context.DeadlineExceeded if wantErr != err { t.Errorf("deadline exceeded error: got: %v, want: %v", err, wantErr) } if errors != nil { t.Errorf("deadline exceeded errors: got: %v, want: nil", err) } } func writeMutateRowsResponse(ss grpc.ServerStream, codes ...codes.Code) error { res := &btpb.MutateRowsResponse{Entries: make([]*btpb.MutateRowsResponse_Entry, len(codes))} for i, code := range codes { res.Entries[i] = &btpb.MutateRowsResponse_Entry{ Index: int64(i), Status: &rpcpb.Status{Code: int32(code), Message: ""}, } } return ss.SendMsg(res) } func TestRetainRowsAfter(t *testing.T) { prevRowRange := NewRange("a", "z") prevRowKey := "m" want := NewRange("m\x00", "z") got := prevRowRange.retainRowsAfter(prevRowKey) if !reflect.DeepEqual(want, got) { t.Errorf("range retry: got %v, want %v", got, want) } prevRowRangeList := RowRangeList{NewRange("a", "d"), NewRange("e", "g"), NewRange("h", "l")} prevRowKey = "f" wantRowRangeList := RowRangeList{NewRange("f\x00", "g"), NewRange("h", "l")} got = prevRowRangeList.retainRowsAfter(prevRowKey) if !reflect.DeepEqual(wantRowRangeList, got) { t.Errorf("range list retry: got %v, want %v", got, wantRowRangeList) } prevRowList := RowList{"a", "b", "c", "d", "e", "f"} prevRowKey = "b" wantList := RowList{"c", "d", "e", "f"} got = prevRowList.retainRowsAfter(prevRowKey) if !reflect.DeepEqual(wantList, got) { t.Errorf("list retry: got %v, want %v", got, wantList) } } func TestRetryReadRows(t *testing.T) { ctx := context.Background() // Intercept requests and delegate to an interceptor defined by the test case errCount := 0 var f func(grpc.ServerStream) error errInjector := func(srv interface{}, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error { if strings.HasSuffix(info.FullMethod, "ReadRows") { return f(ss) } return handler(ctx, ss) } tbl, cleanup, err := setupFakeServer(grpc.StreamInterceptor(errInjector)) defer cleanup() if err != nil { t.Fatalf("fake server setup: %v", err) } errCount = 0 // Test overall request failure and retries f = func(ss grpc.ServerStream) error { var err error req := new(btpb.ReadRowsRequest) ss.RecvMsg(req) switch errCount { case 0: // Retryable request failure err = grpc.Errorf(codes.Unavailable, "") case 1: // Write two rows then error if want, got := "a", string(req.Rows.RowRanges[0].GetStartKeyClosed()); want != got { t.Errorf("first retry, no data received yet: got %q, want %q", got, want) } writeReadRowsResponse(ss, "a", "b") err = grpc.Errorf(codes.Unavailable, "") case 2: // Retryable request failure if want, got := "b\x00", string(req.Rows.RowRanges[0].GetStartKeyClosed()); want != got { t.Errorf("2 range retries: got %q, want %q", got, want) } err = grpc.Errorf(codes.Unavailable, "") case 3: // Write two more rows writeReadRowsResponse(ss, "c", "d") err = nil } errCount++ return err } var got []string tbl.ReadRows(ctx, NewRange("a", "z"), func(r Row) bool { got = append(got, r.Key()) return true }) want := []string{"a", "b", "c", "d"} if !reflect.DeepEqual(got, want) { t.Errorf("retry range integration: got %v, want %v", got, want) } } func writeReadRowsResponse(ss grpc.ServerStream, rowKeys ...string) error { var chunks []*btpb.ReadRowsResponse_CellChunk for _, key := range rowKeys { chunks = append(chunks, &btpb.ReadRowsResponse_CellChunk{ RowKey: []byte(key), FamilyName: &wrappers.StringValue{Value: "fm"}, Qualifier: &wrappers.BytesValue{Value: []byte("col")}, RowStatus: &btpb.ReadRowsResponse_CellChunk_CommitRow{CommitRow: true}, }) } return ss.SendMsg(&btpb.ReadRowsResponse{Chunks: chunks}) }