1/*
2Copyright 2019 Google LLC
3
4Licensed under the Apache License, Version 2.0 (the "License");
5you may not use this file except in compliance with the License.
6You may obtain a copy of the License at
7
8    http://www.apache.org/licenses/LICENSE-2.0
9
10Unless required by applicable law or agreed to in writing, software
11distributed under the License is distributed on an "AS IS" BASIS,
12WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13See the License for the specific language governing permissions and
14limitations under the License.
15*/
16
17package mockserver
18
19import (
20	"context"
21	"net"
22
23	btpb "google.golang.org/genproto/googleapis/bigtable/v2"
24	"google.golang.org/grpc"
25	"google.golang.org/grpc/codes"
26	"google.golang.org/grpc/status"
27)
28
29// Server is an in-memory Cloud Bigtable fake.
30// It is unauthenticated, and only a rough approximation.
31type Server struct {
32	Addr string
33
34	l   net.Listener
35	srv *grpc.Server
36
37	// Any unimplemented methods will cause a panic when called.
38	btpb.BigtableServer
39
40	// Assign new functions to these parameters to implement specific mock
41	// functionality.
42
43	// ReadRowsFn mocks ReadRows.
44	ReadRowsFn func(*btpb.ReadRowsRequest, btpb.Bigtable_ReadRowsServer) error
45	// SampleRowKeysFn mocks SampleRowKeys.
46	SampleRowKeysFn func(*btpb.SampleRowKeysRequest, btpb.Bigtable_SampleRowKeysServer) error
47	// MutateRowFn mocks MutateRow.
48	MutateRowFn func(context.Context, *btpb.MutateRowRequest) (*btpb.MutateRowResponse, error)
49	// MutateRowsFn mocks MutateRows.
50	MutateRowsFn func(*btpb.MutateRowsRequest, btpb.Bigtable_MutateRowsServer) error
51	// CheckAndMutateRowFn mocks CheckAndMutateRow.
52	CheckAndMutateRowFn func(context.Context, *btpb.CheckAndMutateRowRequest) (*btpb.CheckAndMutateRowResponse, error)
53	// ReadModifyWriteRowFn mocks ReadModifyWriteRow.
54	ReadModifyWriteRowFn func(context.Context, *btpb.ReadModifyWriteRowRequest) (*btpb.ReadModifyWriteRowResponse, error)
55}
56
57// NewServer creates a new Server.
58// The Server will be listening for gRPC connections, without TLS,
59// on the provided address. The resolved address is named by the Addr field.
60func NewServer(laddr string, opt ...grpc.ServerOption) (*Server, error) {
61	l, err := net.Listen("tcp", laddr)
62	if err != nil {
63		return nil, err
64	}
65
66	srv := grpc.NewServer(opt...)
67	s := &Server{
68		Addr: l.Addr().String(),
69		l:    l,
70		srv:  srv,
71	}
72
73	btpb.RegisterBigtableServer(srv, s)
74	go srv.Serve(s.l)
75	return s, nil
76}
77
78// Close closes the server.
79func (s *Server) Close() error {
80	if err := s.l.Close(); err != nil {
81		return err
82	}
83	s.srv.Stop()
84	return nil
85}
86
87// ReadRows implements ReadRows of the BigtableServer interface.
88func (s *Server) ReadRows(req *btpb.ReadRowsRequest, srv btpb.Bigtable_ReadRowsServer) error {
89	if s.ReadRowsFn != nil {
90		return s.ReadRowsFn(req, srv)
91	}
92	return status.Error(codes.Unimplemented, "unimplemented")
93}
94
95// SampleRowKeys implements SampleRowKeys of the BigtableServer interface.
96func (s *Server) SampleRowKeys(req *btpb.SampleRowKeysRequest, srv btpb.Bigtable_SampleRowKeysServer) error {
97	if s.SampleRowKeysFn != nil {
98		return s.SampleRowKeysFn(req, srv)
99	}
100	return status.Error(codes.Unimplemented, "unimplemented")
101}
102
103// MutateRow implements MutateRow of the BigtableServer interface.
104func (s *Server) MutateRow(ctx context.Context, req *btpb.MutateRowRequest) (*btpb.MutateRowResponse, error) {
105	if s.MutateRowFn != nil {
106		return s.MutateRowFn(ctx, req)
107	}
108	return nil, status.Error(codes.Unimplemented, "unimplemented")
109}
110
111// MutateRows implements MutateRows of the BigtableServer interface.
112func (s *Server) MutateRows(req *btpb.MutateRowsRequest, srv btpb.Bigtable_MutateRowsServer) error {
113	if s.MutateRowsFn != nil {
114		return s.MutateRowsFn(req, srv)
115	}
116	return status.Error(codes.Unimplemented, "unimplemented")
117}
118
119// CheckAndMutateRow implements CheckAndMutateRow of the BigtableServer interface.
120func (s *Server) CheckAndMutateRow(ctx context.Context, srv *btpb.CheckAndMutateRowRequest) (*btpb.CheckAndMutateRowResponse, error) {
121	if s.CheckAndMutateRowFn != nil {
122		return s.CheckAndMutateRowFn(ctx, srv)
123	}
124	return nil, status.Error(codes.Unimplemented, "unimplemented")
125}
126
127// ReadModifyWriteRow implements ReadModifyWriteRow of the BigtableServer interface.
128func (s *Server) ReadModifyWriteRow(ctx context.Context, srv *btpb.ReadModifyWriteRowRequest) (*btpb.ReadModifyWriteRowResponse, error) {
129	if s.ReadModifyWriteRowFn != nil {
130		return s.ReadModifyWriteRowFn(ctx, srv)
131	}
132	return nil, status.Error(codes.Unimplemented, "unimplemented")
133}
134