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nsmd_test_utils.go
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nsmd_test_utils.go
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package tests
import (
"context"
"fmt"
"io/ioutil"
"net"
"os"
"path"
"strconv"
"sync"
"time"
"github.com/networkservicemesh/networkservicemesh/controlplane/pkg/monitor/remote"
"github.com/networkservicemesh/networkservicemesh/controlplane/pkg/services"
"github.com/networkservicemesh/networkservicemesh/sdk/monitor"
"github.com/networkservicemesh/networkservicemesh/sdk/monitor/connectionmonitor"
"github.com/pkg/errors"
"github.com/golang/protobuf/ptypes/empty"
"github.com/sirupsen/logrus"
"google.golang.org/grpc"
"github.com/networkservicemesh/networkservicemesh/controlplane/api/connection"
"github.com/networkservicemesh/networkservicemesh/controlplane/api/connection/mechanisms/common"
"github.com/networkservicemesh/networkservicemesh/controlplane/api/connection/mechanisms/kernel"
"github.com/networkservicemesh/networkservicemesh/controlplane/api/connectioncontext"
"github.com/networkservicemesh/networkservicemesh/controlplane/api/crossconnect"
"github.com/networkservicemesh/networkservicemesh/controlplane/api/networkservice"
"github.com/networkservicemesh/networkservicemesh/controlplane/api/nsmdapi"
"github.com/networkservicemesh/networkservicemesh/controlplane/api/registry"
nsm2 "github.com/networkservicemesh/networkservicemesh/controlplane/pkg/api/nsm"
"github.com/networkservicemesh/networkservicemesh/controlplane/pkg/model"
"github.com/networkservicemesh/networkservicemesh/controlplane/pkg/nsm"
"github.com/networkservicemesh/networkservicemesh/controlplane/pkg/nsmd"
"github.com/networkservicemesh/networkservicemesh/controlplane/pkg/serviceregistry"
"github.com/networkservicemesh/networkservicemesh/controlplane/pkg/sid"
"github.com/networkservicemesh/networkservicemesh/controlplane/pkg/vni"
"github.com/networkservicemesh/networkservicemesh/forwarder/api/forwarder"
"github.com/networkservicemesh/networkservicemesh/pkg/probes"
"github.com/networkservicemesh/networkservicemesh/pkg/tools"
"github.com/networkservicemesh/networkservicemesh/pkg/tools/spanhelper"
monitor_crossconnect "github.com/networkservicemesh/networkservicemesh/sdk/monitor/crossconnect"
"github.com/networkservicemesh/networkservicemesh/sdk/prefix_pool"
)
const (
Master = "master"
Worker = "worker"
)
type sharedStorage struct {
sync.RWMutex
services map[string]*registry.NetworkService
managers map[string]*registry.NetworkServiceManager
endpoints map[string]*registry.NetworkServiceEndpoint
}
func NewSharedStorage() *sharedStorage {
return &sharedStorage{
services: make(map[string]*registry.NetworkService),
managers: make(map[string]*registry.NetworkServiceManager),
endpoints: make(map[string]*registry.NetworkServiceEndpoint),
}
}
type nsmdTestServiceDiscovery struct {
apiRegistry *testApiRegistry
storage *sharedStorage
nsmCounter int
nsmgrName string
}
func (impl *nsmdTestServiceDiscovery) RegisterNSE(ctx context.Context, in *registry.NSERegistration, opts ...grpc.CallOption) (*registry.NSERegistration, error) {
logrus.Infof("Test Register NSE: %v", in)
if in.GetNetworkService() != nil {
impl.storage.Lock()
impl.storage.services[in.GetNetworkService().GetName()] = in.GetNetworkService()
impl.storage.Unlock()
}
if in.GetNetworkServiceManager() != nil {
in.NetworkServiceManager.Name = impl.nsmgrName
impl.nsmCounter++
}
if in.GetNetworkServiceEndpoint() != nil {
impl.storage.Lock()
impl.storage.endpoints[in.GetNetworkServiceEndpoint().GetName()] = in.GetNetworkServiceEndpoint()
impl.storage.Unlock()
}
in.NetworkServiceManager = impl.storage.managers[impl.nsmgrName]
return in, nil
}
func (impl *nsmdTestServiceDiscovery) BulkRegisterNSE(ctx context.Context, opts ...grpc.CallOption) (registry.NetworkServiceRegistry_BulkRegisterNSEClient, error) {
return nil, errors.Errorf("not implemented")
}
func (impl *nsmdTestServiceDiscovery) RemoveNSE(ctx context.Context, in *registry.RemoveNSERequest, opts ...grpc.CallOption) (*empty.Empty, error) {
impl.storage.Lock()
delete(impl.storage.endpoints, in.GetNetworkServiceEndpointName())
impl.storage.Unlock()
return nil, nil
}
func newNSMDTestServiceDiscovery(testAPI *testApiRegistry, nsmgrName string, storage *sharedStorage) *nsmdTestServiceDiscovery {
return &nsmdTestServiceDiscovery{
storage: storage,
apiRegistry: testAPI,
nsmCounter: 0,
nsmgrName: nsmgrName,
}
}
func (impl *nsmdTestServiceDiscovery) FindNetworkService(ctx context.Context, in *registry.FindNetworkServiceRequest, opts ...grpc.CallOption) (*registry.FindNetworkServiceResponse, error) {
impl.storage.RLock()
storageEndpoints := impl.storage.endpoints
impl.storage.RUnlock()
endpoints := []*registry.NetworkServiceEndpoint{}
managers := map[string]*registry.NetworkServiceManager{}
for _, ep := range storageEndpoints {
if ep.NetworkServiceName == in.NetworkServiceName {
endpoints = append(endpoints, ep)
mgr := impl.storage.managers[ep.NetworkServiceManagerName]
if mgr != nil {
managers[mgr.Name] = mgr
}
}
}
return ®istry.FindNetworkServiceResponse{
NetworkService: impl.storage.services[in.NetworkServiceName],
NetworkServiceEndpoints: endpoints,
NetworkServiceManagers: managers,
}, nil
}
func (impl *nsmdTestServiceDiscovery) RegisterNSM(ctx context.Context, in *registry.NetworkServiceManager, opts ...grpc.CallOption) (*registry.NetworkServiceManager, error) {
logrus.Infof("Register NSM: %v", in)
in.Name = impl.nsmgrName
impl.nsmCounter++
impl.storage.managers[impl.nsmgrName] = in
return in, nil
}
func (impl *nsmdTestServiceDiscovery) GetEndpoints(ctx context.Context, empty *empty.Empty, opts ...grpc.CallOption) (*registry.NetworkServiceEndpointList, error) {
return ®istry.NetworkServiceEndpointList{
NetworkServiceEndpoints: []*registry.NetworkServiceEndpoint{
{
Name: "ep1",
NetworkServiceManagerName: "nsm1",
},
},
}, nil
}
type nsmdTestServiceRegistry struct {
nseRegistry *nsmdTestServiceDiscovery
apiRegistry *testApiRegistry
testForwarderConnection *testForwarderConnection
localTestNSE networkservice.NetworkServiceClient
vniAllocator vni.VniAllocator
sidAllocator sid.Allocator
rootDir string
}
func (impl *nsmdTestServiceRegistry) SIDAllocator() sid.Allocator {
return impl.sidAllocator
}
func (impl *nsmdTestServiceRegistry) VniAllocator() vni.VniAllocator {
return impl.vniAllocator
}
func (impl *nsmdTestServiceRegistry) NewWorkspaceProvider() serviceregistry.WorkspaceLocationProvider {
return nsmd.NewWorkspaceProvider(impl.rootDir)
}
func (impl *nsmdTestServiceRegistry) WaitForForwarderAvailable(ctx context.Context, model model.Model, timeout time.Duration) error {
return nsmd.NewServiceRegistry().WaitForForwarderAvailable(ctx, model, timeout)
}
func (impl *nsmdTestServiceRegistry) WorkspaceName(endpoint *registry.NSERegistration) string {
return ""
}
func (impl *nsmdTestServiceRegistry) RemoteNetworkServiceClient(ctx context.Context, nsm *registry.NetworkServiceManager) (networkservice.NetworkServiceClient, *grpc.ClientConn, error) {
span := spanhelper.FromContext(ctx, "RemoteNetworkServiceClient")
defer span.Finish()
err := tools.WaitForPortAvailable(span.Context(), "tcp", nsm.Url, 100*time.Millisecond)
if err != nil {
return nil, nil, err
}
span.Logger().Info("Remote Network Service is available, attempting to connect...")
conn, err := tools.DialContextTCP(span.Context(), nsm.GetUrl())
span.LogError(err)
if err != nil {
span.Logger().Errorf("Failed to dial Network Service Registry at %s: %s", nsm.Url, err)
return nil, nil, err
}
client := networkservice.NewNetworkServiceClient(conn)
return client, conn, nil
}
type localTestNSENetworkServiceClient struct {
sync.Mutex
req *networkservice.NetworkServiceRequest
prefixPool prefix_pool.PrefixPool
requestHandleCounter int
}
func (impl *localTestNSENetworkServiceClient) Request(ctx context.Context, in *networkservice.NetworkServiceRequest, opts ...grpc.CallOption) (*connection.Connection, error) {
impl.Lock()
impl.requestHandleCounter++
impl.Unlock()
impl.req = in
netns, _ := tools.GetCurrentNS()
if netns == "" {
netns = "12"
}
mechanism := &connection.Mechanism{
Type: kernel.MECHANISM,
Parameters: map[string]string{
common.NetNsInodeKey: netns,
// TODO: Fix this terrible hack using xid for getting a unique interface name
common.InterfaceNameKey: "nsm" + in.GetConnection().GetId(),
},
}
// TODO take into consideration LocalMechnism preferences sent in request
srcIP, dstIP, requested, err := impl.prefixPool.Extract(in.Connection.Id, connectioncontext.IpFamily_IPV4, in.Connection.GetContext().GetIpContext().ExtraPrefixRequest...)
if err != nil {
return nil, err
}
conn := &connection.Connection{
Id: in.GetConnection().GetId(),
NetworkService: in.GetConnection().GetNetworkService(),
Mechanism: mechanism,
Context: &connectioncontext.ConnectionContext{
IpContext: &connectioncontext.IPContext{
SrcIpAddr: srcIP.String(),
DstIpAddr: dstIP.String(),
ExtraPrefixes: requested,
},
},
}
err = conn.IsComplete()
if err != nil {
logrus.Error(err)
return nil, err
}
return conn, nil
}
func (impl *localTestNSENetworkServiceClient) Close(ctx context.Context, in *connection.Connection, opts ...grpc.CallOption) (*empty.Empty, error) {
//panic("implement me")
return nil, nil
}
func (impl *nsmdTestServiceRegistry) EndpointConnection(ctx context.Context, endpoint *model.Endpoint) (networkservice.NetworkServiceClient, *grpc.ClientConn, error) {
return impl.localTestNSE, nil, nil
}
type testForwarderConnection struct {
connections []*crossconnect.CrossConnect
}
func (impl *testForwarderConnection) Request(ctx context.Context, in *crossconnect.CrossConnect, opts ...grpc.CallOption) (*crossconnect.CrossConnect, error) {
impl.connections = append(impl.connections, in)
if source := in.Source; source != nil && source.Labels != nil {
if source.Labels != nil {
if val, ok := source.Labels["forwarder_sleep"]; ok {
delay, err := strconv.Atoi(val)
if err == nil {
logrus.Infof("Delaying Forwarder Request: %v", delay)
<-time.After(time.Duration(delay) * time.Second)
}
}
}
}
return in, nil
}
func (impl *testForwarderConnection) Close(ctx context.Context, in *crossconnect.CrossConnect, opts ...grpc.CallOption) (*empty.Empty, error) {
return nil, nil
}
func (impl *testForwarderConnection) MonitorMechanisms(ctx context.Context, in *empty.Empty, opts ...grpc.CallOption) (forwarder.MechanismsMonitor_MonitorMechanismsClient, error) {
return nil, nil
}
func (impl *nsmdTestServiceRegistry) ForwarderConnection(ctx context.Context, forwarder *model.Forwarder) (forwarder.ForwarderClient, *grpc.ClientConn, error) {
return impl.testForwarderConnection, nil, nil
}
func (impl *nsmdTestServiceRegistry) NSMDApiClient(ctx context.Context) (nsmdapi.NSMDClient, *grpc.ClientConn, error) {
span := spanhelper.FromContext(ctx, "NSMDApiClient")
defer span.Finish()
addr := fmt.Sprintf("%s:%d", "127.0.0.1", impl.apiRegistry.nsmdPort)
span.Logger().Infof("Connecting to nsmd on socket: %s...", addr)
// Wait to be sure it is already initialized
err := tools.WaitForPortAvailable(span.Context(), "tcp", addr, 100*time.Millisecond)
span.LogError(err)
if err != nil {
return nil, nil, err
}
conn, err := tools.DialContextTCP(span.Context(), addr)
if err != nil {
err = errors.Errorf("failed to dial Network Service Registry at %s: %s", addr, err)
span.LogError(err)
return nil, nil, err
}
span.Logger().Info("Requesting nsmd for client connection...")
return nsmdapi.NewNSMDClient(conn), conn, nil
}
func (impl *nsmdTestServiceRegistry) GetPublicAPI() string {
return fmt.Sprintf("%s:%d", "127.0.0.1", impl.apiRegistry.nsmdPublicPort)
}
func (impl *nsmdTestServiceRegistry) DiscoveryClient(context.Context) (registry.NetworkServiceDiscoveryClient, error) {
return impl.nseRegistry, nil
}
func (impl *nsmdTestServiceRegistry) NseRegistryClient(context.Context) (registry.NetworkServiceRegistryClient, error) {
return impl.nseRegistry, nil
}
func (impl *nsmdTestServiceRegistry) NsmRegistryClient(context.Context) (registry.NsmRegistryClient, error) {
return impl.nseRegistry, nil
}
func (impl *nsmdTestServiceRegistry) Stop() {
logrus.Printf("Delete temporary workspace root: %s", impl.rootDir)
os.RemoveAll(impl.rootDir)
}
type testApiRegistry struct {
nsmdPort int
nsmdPublicPort int
}
func (impl *testApiRegistry) NewNSMServerListener() (net.Listener, error) {
listener, err := net.Listen("tcp", "127.0.0.1:0")
impl.nsmdPort = listener.Addr().(*net.TCPAddr).Port
return listener, err
}
func (impl *testApiRegistry) NewPublicListener(nsmdAPIAddress string) (net.Listener, error) {
listener, err := net.Listen("tcp", nsmdAPIAddress)
impl.nsmdPublicPort = listener.Addr().(*net.TCPAddr).Port
return listener, err
}
func newTestApiRegistry() *testApiRegistry {
return &testApiRegistry{
nsmdPort: 0,
nsmdPublicPort: 0,
}
}
func newNetworkServiceClient(nsmServerSocket string) (networkservice.NetworkServiceClient, *grpc.ClientConn, error) {
// Wait till we actually have an nsmd to talk to
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
defer cancel()
err := tools.WaitForPortAvailable(ctx, "unix", nsmServerSocket, 100*time.Millisecond)
if err != nil {
return nil, nil, err
}
conn, err := tools.DialUnix(nsmServerSocket)
if err != nil {
return nil, nil, err
}
// Init related activities start here
nsmConnectionClient := networkservice.NewNetworkServiceClient(conn)
return nsmConnectionClient, conn, nil
}
type nsmdFullServer interface {
Stop()
}
type nsmdFullServerImpl struct {
apiRegistry *testApiRegistry
nseRegistry *nsmdTestServiceDiscovery
serviceRegistry *nsmdTestServiceRegistry
TestModel model.Model
manager nsm2.NetworkServiceManager
nsmServer nsmd.NSMServer
rootDir string
monitorCrossConnectClient *nsmd.NsmMonitorCrossConnectClient
}
func (srv *nsmdFullServerImpl) Stop() {
srv.serviceRegistry.Stop()
if srv.nsmServer != nil {
srv.nsmServer.Stop()
}
dir, _ := ioutil.ReadDir(srv.rootDir)
for _, d := range dir {
_ = os.RemoveAll(path.Join([]string{srv.rootDir, d.Name()}...))
}
}
func (srv *nsmdFullServerImpl) StopNoClean() {
if srv.nsmServer != nil {
srv.nsmServer.Stop()
}
}
func (srv *nsmdFullServerImpl) AddFakeForwarder(dp_name string, dp_addr string) {
srv.TestModel.AddForwarder(context.Background(), &model.Forwarder{
RegisteredName: dp_name,
SocketLocation: dp_addr,
LocalMechanisms: []*connection.Mechanism{
{
Type: kernel.MECHANISM,
},
},
MechanismsConfigured: true,
})
}
func (srv *nsmdFullServerImpl) RegisterFakeEndpoint(networkServiceName string, payload string, nse_address string) *model.Endpoint {
return srv.registerFakeEndpointWithName(networkServiceName, payload, nse_address, networkServiceName+"provider")
}
func (srv *nsmdFullServerImpl) registerFakeEndpointWithName(networkServiceName string, payload string, nsmgrName string, endpointname string) *model.Endpoint {
reg := ®istry.NSERegistration{
NetworkService: ®istry.NetworkService{
Name: networkServiceName,
Payload: payload,
},
NetworkServiceEndpoint: ®istry.NetworkServiceEndpoint{
Name: endpointname,
Payload: payload,
NetworkServiceManagerName: nsmgrName,
NetworkServiceName: networkServiceName,
},
}
regResp, err := srv.nseRegistry.RegisterNSE(context.Background(), reg)
if err != nil {
panic(err)
}
if regResp.NetworkService.Name != networkServiceName {
panic(errors.Errorf("%s is not equal to %s", regResp.NetworkService.Name, networkServiceName))
}
return &model.Endpoint{
Endpoint: reg,
Workspace: "nsm-1",
SocketLocation: "nsm-1/client",
}
}
func (srv *nsmdFullServerImpl) requestNSMConnection(clientName string) (networkservice.NetworkServiceClient, *grpc.ClientConn) {
response := srv.RequestNSM(clientName)
// Now we could try to connect via Client API
nsmClient, conn := srv.CreateNSClient(response)
return nsmClient, conn
}
func (srv *nsmdFullServerImpl) CreateNSClient(response *nsmdapi.ClientConnectionReply) (networkservice.NetworkServiceClient, *grpc.ClientConn) {
nsmClient, conn, err := newNetworkServiceClient(response.HostBasedir + "/" + response.Workspace + "/" + response.NsmServerSocket)
if err != nil {
panic(err)
}
return nsmClient, conn
}
func (srv *nsmdFullServerImpl) RequestNSM(clientName string) *nsmdapi.ClientConnectionReply {
client, con, err := srv.serviceRegistry.NSMDApiClient(context.Background())
if err != nil {
panic(err)
}
defer con.Close()
response, err := client.RequestClientConnection(context.Background(), &nsmdapi.ClientConnectionRequest{
Workspace: clientName,
})
if err != nil {
panic(err)
}
logrus.Printf("workspace %s", response.Workspace)
if response.Workspace != clientName {
panic(errors.Errorf("%s is not equal to %s", response.Workspace, clientName))
}
return response
}
func NewNSMDFullServer(nsmgrName string, storage *sharedStorage) *nsmdFullServerImpl {
rootDir, err := ioutil.TempDir("", "nsmd_test")
if err != nil {
panic(err)
}
return newNSMDFullServerAt(context.Background(), nsmgrName, storage, rootDir, model.NewModel())
}
func NewNSMDFullServerWithModel(nsmgrName string, storage *sharedStorage, testModel model.Model) *nsmdFullServerImpl {
rootDir, err := ioutil.TempDir("", "nsmd_test")
if err != nil {
panic(err)
}
return newNSMDFullServerAt(context.Background(), nsmgrName, storage, rootDir, testModel)
}
func newNSMDFullServerAt(ctx context.Context, nsmgrName string, storage *sharedStorage, rootDir string, testModel model.Model) *nsmdFullServerImpl {
srv := &nsmdFullServerImpl{}
srv.apiRegistry = newTestApiRegistry()
srv.nseRegistry = newNSMDTestServiceDiscovery(srv.apiRegistry, nsmgrName, storage)
srv.rootDir = rootDir
prefixPool, err := prefix_pool.NewPrefixPool("10.20.1.0/24")
if err != nil {
panic(err)
}
srv.serviceRegistry = &nsmdTestServiceRegistry{
nseRegistry: srv.nseRegistry,
apiRegistry: srv.apiRegistry,
testForwarderConnection: &testForwarderConnection{},
localTestNSE: &localTestNSENetworkServiceClient{
prefixPool: prefixPool,
requestHandleCounter: 0,
},
vniAllocator: vni.NewVniAllocator(),
rootDir: rootDir,
}
srv.TestModel = testModel
srv.manager = nsm.NewNetworkServiceManager(ctx, srv.TestModel, srv.serviceRegistry)
// Choose a public API listener
sock, err := srv.apiRegistry.NewPublicListener("127.0.0.1:0")
if err != nil {
logrus.Errorf("Failed to start Public API server...")
return nil
}
// Lets start NSMD NSE registry service
nsmServer, err := nsmd.StartNSMServer(ctx, srv.TestModel, srv.manager, srv.apiRegistry)
srv.nsmServer = nsmServer
if err != nil {
panic(err)
}
srv.monitorCrossConnectClient = nsmd.NewMonitorCrossConnectClient(srv.TestModel, nsmServer, nsmServer.XconManager(), srv.nsmServer)
srv.TestModel.AddListener(srv.monitorCrossConnectClient)
probes := probes.New("Test probes", nil)
nsmServer.StartAPIServerAt(ctx, sock, probes)
return srv
}
// CreateRequest - create test request
func CreateRequest() *networkservice.NetworkServiceRequest {
request := &networkservice.NetworkServiceRequest{
Connection: &connection.Connection{
NetworkService: "golden_network",
Context: &connectioncontext.ConnectionContext{
IpContext: &connectioncontext.IPContext{
DstIpRequired: true,
SrcIpRequired: true,
},
},
Labels: make(map[string]string),
},
MechanismPreferences: []*connection.Mechanism{
{
Type: kernel.MECHANISM,
Parameters: map[string]string{
common.NetNsInodeKey: "10",
common.InterfaceNameKey: "icmp-responder1",
},
},
},
}
return request
}
type monitorManager struct {
crossConnectMonitor monitor_crossconnect.MonitorServer
remoteConnectionMonitor remote.MonitorServer
localConnectionMonitors map[string]connectionmonitor.MonitorServer
}
func (m *monitorManager) CrossConnectMonitor() monitor_crossconnect.MonitorServer {
return m.crossConnectMonitor
}
func (m *monitorManager) RemoteConnectionMonitor() monitor.Server {
return m.remoteConnectionMonitor
}
func (m *monitorManager) LocalConnectionMonitor(workspace string) connectionmonitor.MonitorServer {
return m.localConnectionMonitors[workspace]
}
type endpointManager struct {
model model.Model
}
func (stub *endpointManager) DeleteEndpointWithBrokenConnection(ctx context.Context, endpoint *model.Endpoint) error {
stub.model.DeleteEndpoint(ctx, endpoint.EndpointName())
return nil
}
func startAPIServer(model model.Model, nsmdAPIAddress string) (*grpc.Server, monitor_crossconnect.MonitorServer, net.Listener, error) {
sock, err := net.Listen("tcp", nsmdAPIAddress)
if err != nil {
return nil, nil, sock, err
}
grpcServer := tools.NewServer(context.Background())
serviceRegistry := nsmd.NewServiceRegistry()
xconManager := services.NewClientConnectionManager(model, nil, serviceRegistry)
monitorManager := &monitorManager{
crossConnectMonitor: monitor_crossconnect.NewMonitorServer(),
remoteConnectionMonitor: remote.NewMonitorServer(xconManager),
localConnectionMonitors: map[string]connectionmonitor.MonitorServer{},
}
crossconnect.RegisterMonitorCrossConnectServer(grpcServer, monitorManager.crossConnectMonitor)
connection.RegisterMonitorConnectionServer(grpcServer, monitorManager.remoteConnectionMonitor)
monitorClient := nsmd.NewMonitorCrossConnectClient(model, monitorManager, xconManager, &endpointManager{model: model})
model.AddListener(monitorClient)
// Add more public API services here.
go func() {
if err := grpcServer.Serve(sock); err != nil {
logrus.Errorf("failed to start gRPC NSMD API server %+v", err)
}
}()
logrus.Infof("NSM gRPC API Server: %s is operational", nsmdAPIAddress)
return grpcServer, monitorManager.crossConnectMonitor, sock, nil
}
func readNMSDCrossConnectEvents(address string, count int) []*crossconnect.CrossConnectEvent {
var err error
conn, err := tools.DialTCP(address)
if err != nil {
logrus.Errorf("Failure to communicate with the socket %s with error: %+v", address, err)
return nil
}
defer func() {
err = conn.Close()
if err != nil {
logrus.Errorf("An error during close conn: %v", err)
}
}()
forwarderClient := crossconnect.NewMonitorCrossConnectClient(conn)
// Looping indefinitely or until grpc returns an error indicating the other end closed connection.
stream, err := forwarderClient.MonitorCrossConnects(context.Background(), &empty.Empty{})
if err != nil {
logrus.Warningf("Error: %+v.", err)
return nil
}
pos := 0
result := []*crossconnect.CrossConnectEvent{}
for {
event, err := stream.Recv()
logrus.Infof("(test) receive event: %s %v", event.Type, event.CrossConnects)
if err != nil {
logrus.Errorf("Error2: %+v.", err)
return result
}
result = append(result, event)
pos++
if pos == count {
return result
}
}
}
type eventCollector struct {
messages []interface{}
events chan interface{}
}
func (e *eventCollector) SendMsg(msg interface{}) error {
e.messages = append(e.messages, msg)
e.events <- msg
return nil
}