refactoring

weed/pb/grpc_client_server.go

@@ -0,0 +1,182 @@
+package pb
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/keepalive"
+
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
+)
+
+var (
+	// cache grpc connections
+	grpcClients     = make(map[string]*grpc.ClientConn)
+	grpcClientsLock sync.Mutex
+)
+
+func init() {
+	http.DefaultTransport.(*http.Transport).MaxIdleConnsPerHost = 1024
+}
+
+func NewGrpcServer(opts ...grpc.ServerOption) *grpc.Server {
+	var options []grpc.ServerOption
+	options = append(options, grpc.KeepaliveParams(keepalive.ServerParameters{
+		Time:    10 * time.Second, // wait time before ping if no activity
+		Timeout: 20 * time.Second, // ping timeout
+	}), grpc.KeepaliveEnforcementPolicy(keepalive.EnforcementPolicy{
+		MinTime:             60 * time.Second, // min time a client should wait before sending a ping
+		PermitWithoutStream: true,
+	}))
+	for _, opt := range opts {
+		if opt != nil {
+			options = append(options, opt)
+		}
+	}
+	return grpc.NewServer(options...)
+}
+
+func GrpcDial(ctx context.Context, address string, opts ...grpc.DialOption) (*grpc.ClientConn, error) {
+	// opts = append(opts, grpc.WithBlock())
+	// opts = append(opts, grpc.WithTimeout(time.Duration(5*time.Second)))
+	var options []grpc.DialOption
+	options = append(options,
+		// grpc.WithInsecure(),
+		grpc.WithKeepaliveParams(keepalive.ClientParameters{
+			Time:                30 * time.Second, // client ping server if no activity for this long
+			Timeout:             20 * time.Second,
+			PermitWithoutStream: true,
+		}))
+	for _, opt := range opts {
+		if opt != nil {
+			options = append(options, opt)
+		}
+	}
+	return grpc.DialContext(ctx, address, options...)
+}
+
+func WithCachedGrpcClient(fn func(*grpc.ClientConn) error, address string, opts ...grpc.DialOption) error {
+
+	grpcClientsLock.Lock()
+
+	existingConnection, found := grpcClients[address]
+	if found {
+		grpcClientsLock.Unlock()
+		err := fn(existingConnection)
+		if err != nil {
+			grpcClientsLock.Lock()
+			delete(grpcClients, address)
+			grpcClientsLock.Unlock()
+			existingConnection.Close()
+		}
+		return err
+	}
+
+	grpcConnection, err := GrpcDial(context.Background(), address, opts...)
+	if err != nil {
+		grpcClientsLock.Unlock()
+		return fmt.Errorf("fail to dial %s: %v", address, err)
+	}
+
+	grpcClients[address] = grpcConnection
+	grpcClientsLock.Unlock()
+
+	err = fn(grpcConnection)
+	if err != nil {
+		grpcClientsLock.Lock()
+		delete(grpcClients, address)
+		grpcClientsLock.Unlock()
+		grpcConnection.Close()
+	}
+
+	return err
+}
+
+func ParseServerToGrpcAddress(server string) (serverGrpcAddress string, err error) {
+	colonIndex := strings.LastIndex(server, ":")
+	if colonIndex < 0 {
+		return "", fmt.Errorf("server should have hostname:port format: %v", server)
+	}
+
+	port, parseErr := strconv.ParseUint(server[colonIndex+1:], 10, 64)
+	if parseErr != nil {
+		return "", fmt.Errorf("server port parse error: %v", parseErr)
+	}
+
+	grpcPort := int(port) + 10000
+
+	return fmt.Sprintf("%s:%d", server[:colonIndex], grpcPort), nil
+}
+
+func ServerToGrpcAddress(server string) (serverGrpcAddress string) {
+	hostnameAndPort := strings.Split(server, ":")
+	if len(hostnameAndPort) != 2 {
+		return fmt.Sprintf("unexpected server address: %s", server)
+	}
+
+	port, parseErr := strconv.ParseUint(hostnameAndPort[1], 10, 64)
+	if parseErr != nil {
+		return fmt.Sprintf("failed to parse port for %s:%s", hostnameAndPort[0], hostnameAndPort[1])
+	}
+
+	grpcPort := int(port) + 10000
+
+	return fmt.Sprintf("%s:%d", hostnameAndPort[0], grpcPort)
+}
+
+func WithMasterClient(master string, grpcDialOption grpc.DialOption, fn func(client master_pb.SeaweedClient) error) error {
+
+	masterGrpcAddress, parseErr := ParseServerToGrpcAddress(master)
+	if parseErr != nil {
+		return fmt.Errorf("failed to parse master grpc %v: %v", master, parseErr)
+	}
+
+	return WithCachedGrpcClient(func(grpcConnection *grpc.ClientConn) error {
+		client := master_pb.NewSeaweedClient(grpcConnection)
+		return fn(client)
+	}, masterGrpcAddress, grpcDialOption)
+
+}
+
+func WithFilerClient(filer string, grpcDialOption grpc.DialOption, fn func(client filer_pb.SeaweedFilerClient) error) error {
+
+	filerGrpcAddress, parseErr := ParseServerToGrpcAddress(filer)
+	if parseErr != nil {
+		return fmt.Errorf("failed to parse filer grpc %v: %v", filer, parseErr)
+	}
+
+	return WithGrpcFilerClient(filerGrpcAddress, grpcDialOption, fn)
+
+}
+
+func WithGrpcFilerClient(filerGrpcAddress string, grpcDialOption grpc.DialOption, fn func(client filer_pb.SeaweedFilerClient) error) error {
+
+	return WithCachedGrpcClient(func(grpcConnection *grpc.ClientConn) error {
+		client := filer_pb.NewSeaweedFilerClient(grpcConnection)
+		return fn(client)
+	}, filerGrpcAddress, grpcDialOption)
+
+}
+
+func ParseFilerGrpcAddress(filer string) (filerGrpcAddress string, err error) {
+	hostnameAndPort := strings.Split(filer, ":")
+	if len(hostnameAndPort) != 2 {
+		return "", fmt.Errorf("filer should have hostname:port format: %v", hostnameAndPort)
+	}
+
+	filerPort, parseErr := strconv.ParseUint(hostnameAndPort[1], 10, 64)
+	if parseErr != nil {
+		return "", fmt.Errorf("filer port parse error: %v", parseErr)
+	}
+
+	filerGrpcPort := int(filerPort) + 10000
+
+	return fmt.Sprintf("%s:%d", hostnameAndPort[0], filerGrpcPort), nil
+}