fake_test.go

Documentation: cloud.google.com/go/rpcreplay

     1  // Copyright 2017 Google LLC
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package rpcreplay
    16  
    17  import (
    18  	"context"
    19  	"io"
    20  	"log"
    21  	"net"
    22  
    23  	pb "cloud.google.com/go/rpcreplay/proto/intstore"
    24  	"google.golang.org/grpc"
    25  	"google.golang.org/grpc/codes"
    26  	"google.golang.org/grpc/status"
    27  )
    28  
    29  // intStoreServer is an in-memory implementation of IntStore.
    30  type intStoreServer struct {
    31  	pb.IntStoreServer
    32  
    33  	Addr string
    34  	l    net.Listener
    35  	gsrv *grpc.Server
    36  
    37  	items map[string]int32
    38  }
    39  
    40  func newIntStoreServer() *intStoreServer {
    41  	l, err := net.Listen("tcp", "localhost:0")
    42  	if err != nil {
    43  		log.Fatal(err)
    44  	}
    45  	s := &intStoreServer{
    46  		Addr: l.Addr().String(),
    47  		l:    l,
    48  		gsrv: grpc.NewServer(),
    49  	}
    50  	pb.RegisterIntStoreServer(s.gsrv, s)
    51  	go s.gsrv.Serve(s.l)
    52  	return s
    53  }
    54  
    55  func (s *intStoreServer) stop() {
    56  	s.gsrv.Stop()
    57  	s.l.Close()
    58  }
    59  
    60  func (s *intStoreServer) Set(_ context.Context, item *pb.Item) (*pb.SetResponse, error) {
    61  	old := s.setItem(item)
    62  	return &pb.SetResponse{PrevValue: old}, nil
    63  }
    64  
    65  func (s *intStoreServer) setItem(item *pb.Item) int32 {
    66  	if s.items == nil {
    67  		s.items = map[string]int32{}
    68  	}
    69  	old := s.items[item.Name]
    70  	s.items[item.Name] = item.Value
    71  	return old
    72  }
    73  
    74  func (s *intStoreServer) Get(_ context.Context, req *pb.GetRequest) (*pb.Item, error) {
    75  	val, ok := s.items[req.Name]
    76  	if !ok {
    77  		return nil, status.Errorf(codes.NotFound, "%q", req.Name)
    78  	}
    79  	return &pb.Item{Name: req.Name, Value: val}, nil
    80  }
    81  
    82  func (s *intStoreServer) ListItems(req *pb.ListItemsRequest, ss pb.IntStore_ListItemsServer) error {
    83  	for name, val := range s.items {
    84  		if val > req.GreaterThan {
    85  			if err := ss.Send(&pb.Item{Name: name, Value: val}); err != nil {
    86  				return err
    87  			}
    88  		}
    89  	}
    90  	return nil
    91  }
    92  
    93  func (s *intStoreServer) SetStream(ss pb.IntStore_SetStreamServer) error {
    94  	n := 0
    95  	for {
    96  		item, err := ss.Recv()
    97  		if err == io.EOF {
    98  			break
    99  		}
   100  		if err != nil {
   101  			return err
   102  		}
   103  		s.setItem(item)
   104  		n++
   105  	}
   106  	return ss.SendAndClose(&pb.Summary{Count: int32(n)})
   107  }
   108  
   109  func (s *intStoreServer) StreamChat(ss pb.IntStore_StreamChatServer) error {
   110  	for {
   111  		item, err := ss.Recv()
   112  		if err == io.EOF {
   113  			break
   114  		}
   115  		if err != nil {
   116  			return err
   117  		}
   118  		if err := ss.Send(item); err != nil {
   119  			return err
   120  		}
   121  	}
   122  	return nil
   123  }
   124
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