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package main |
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import ( |
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"context" |
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"errors" |
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6
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"flag" |
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"fmt" |
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"github.com/arazmj/gerdu/cache" |
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"github.com/arazmj/gerdu/httpserver" |
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"github.com/arazmj/gerdu/lfucache" |
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"github.com/arazmj/gerdu/lrucache" |
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"github.com/arazmj/gerdu/proto" |
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"github.com/arazmj/gerdu/weakcache" |
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"github.com/inhies/go-bytesize" |
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"google.golang.org/grpc" |
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"google.golang.org/grpc/credentials" |
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"log" |
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"net" |
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"os" |
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"strconv" |
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"strings" |
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"sync" |
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) |
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var gerdu cache.UnImplementedCache |
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var wg = sync.WaitGroup{} |
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var ( |
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verbose = flag.Bool("verbose", false, "verbose logging") |
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capacityStr = flag.String("capacity", "64MB", |
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"The size of cache, once cache reached this capacity old values will evicted.\n"+ |
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"Specify a numerical value followed by one of the following units (not case sensitive)"+ |
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"\nK or KB: Kilobytes"+ |
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"\nM or MB: Megabytes"+ |
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"\nG or GB: Gigabytes"+ |
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"\nT or TB: Terabytes") |
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httpPort = flag.Int("httpport", 8080, "the http server port number") |
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grpcPort = flag.Int("grpcport", 8081, "the grpc server port number") |
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kind = flag.String("type", "lru", "type of cache, lru or lfu, weak") |
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protocols = flag.String("protocols", "http", "protocol grpc or http, multiple values can be selected seperated by comma") |
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tlsKey = flag.String("key", "", "SSL certificate private key") |
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tlsCert = flag.String("cert", "", "SSL certificate public key") |
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secure = len(*tlsCert) > 0 && len(*tlsKey) > 0 |
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) |
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func main() { |
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flag.Parse() |
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capacity, _ := bytesize.Parse(*capacityStr) |
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if strings.ToLower(*kind) == "lru" { |
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gerdu = lrucache.NewCache(capacity) |
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} else if strings.ToLower(*kind) == "lfu" { |
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gerdu = lfucache.NewCache(capacity) |
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} else if strings.ToLower(*kind) == "weak" { |
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gerdu = weakcache.NewWeakCache() |
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} else { |
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fmt.Println("Invalid value for type") |
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os.Exit(1) |
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} |
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*protocols = strings.ToLower(*protocols) |
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if strings.Contains(*protocols, "http") { |
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wg.Add(1) |
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go func() { |
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defer wg.Done() |
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if secure { |
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httpserver.HttpServeTLS(*httpPort, *tlsCert, *tlsKey, gerdu, *verbose) |
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} else { |
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httpserver.HttpServe(*httpPort, gerdu, *verbose) |
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} |
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}() |
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} |
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if strings.Contains(*protocols, "grpc") { |
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wg.Add(1) |
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go func() { |
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grpcServer() |
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}() |
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} else { |
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fmt.Println("Invalid value for protocol") |
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os.Exit(1) |
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} |
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wg.Wait() |
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} |
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func grpcServer() { |
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defer wg.Done() |
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host := ":" + strconv.Itoa(*grpcPort) |
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lis, err := net.Listen("tcp", host) |
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log.Printf("Gerdu started listening gRPC on %d port\n", *grpcPort) |
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if err != nil { |
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log.Fatalf("failed to listen: %v", err) |
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} |
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var s *grpc.Server |
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if len(*tlsCert) > 0 && len(*tlsKey) > 0 { |
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credentials, err := credentials.NewServerTLSFromFile(*tlsCert, *tlsKey) |
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if err != nil { |
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log.Fatalf("Failed to setup TLS for gRPC service: %v", err) |
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} |
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s = grpc.NewServer(grpc.Creds(credentials)) |
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} else { |
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s = grpc.NewServer() |
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} |
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proto.RegisterGerduServer(s, &server{}) |
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if err := s.Serve(lis); err != nil { |
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log.Fatalf("failed to serve: %v", err) |
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} |
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} |
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110
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type server struct { |
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proto.UnimplementedGerduServer |
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} |
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114
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func (s *server) Put(ctx context.Context, request *proto.PutRequest) (*proto.PutResponse, error) { |
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value := string(request.Value) |
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key := request.Key |
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created := gerdu.Put(key, value) |
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if *verbose { |
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if !created { |
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log.Printf("gRPC UPDATE Key: %s Value: %s\n", key, value) |
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} else { |
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log.Printf("gRPC INSERT Key: %s Value: %s\n", key, value) |
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} |
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} |
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return &proto.PutResponse{ |
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Created: created, |
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}, nil |
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128
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} |
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130
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func (s *server) Get(ctx context.Context, request *proto.GetRequest) (*proto.GetResponse, error) { |
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value, ok := gerdu.Get(request.Key) |
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if ok { |
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if *verbose { |
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log.Printf("gRPC RETREIVED Key: %s Value: %s\n", request.Key, value) |
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} |
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return &proto.GetResponse{ |
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Value: []byte(value), |
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}, nil |
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} |
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if *verbose { |
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log.Printf("gRPC MISSED Key: %s \n", value) |
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} |
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143
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return nil, errors.New("key not found") |
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144
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} |
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145
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arazmj /
gerdu
