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collector_client_grpc.go
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collector_client_grpc.go
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package lightstep
import (
"context"
"fmt"
"reflect"
"time"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/metadata"
// N.B.(jmacd): Do not use google.golang.org/glog in this package.
"github.com/lightstep/lightstep-tracer-common/golang/gogo/collectorpb"
)
const (
spansDropped = "spans.dropped"
logEncoderErrors = "log_encoder.errors"
)
var (
intType = reflect.TypeOf(int64(0))
)
// grpcCollectorClient specifies how to send reports back to a LightStep
// collector via grpc.
type grpcCollectorClient struct {
// auth and runtime information
attributes map[string]string
reporterID uint64
// accessToken is the access token used for explicit trace collection requests.
accessToken string
maxReportingPeriod time.Duration // set by GrpcOptions.MaxReportingPeriod
reconnectPeriod time.Duration // set by GrpcOptions.ReconnectPeriod
reportingTimeout time.Duration // set by GrpcOptions.ReportTimeout
// Remote service that will receive reports.
address string
grpcClient collectorpb.CollectorServiceClient
connTimestamp time.Time
dialOptions []grpc.DialOption
// converters
converter *protoConverter
// For testing purposes only
grpcConnectorFactory ConnectorFactory
}
func newGrpcCollectorClient(opts Options, reporterID uint64, attributes map[string]string) (*grpcCollectorClient, error) {
rec := &grpcCollectorClient{
attributes: attributes,
reporterID: reporterID,
accessToken: opts.AccessToken,
maxReportingPeriod: opts.ReportingPeriod,
reconnectPeriod: opts.ReconnectPeriod,
reportingTimeout: opts.ReportTimeout,
dialOptions: opts.DialOptions,
converter: newProtoConverter(opts),
grpcConnectorFactory: opts.ConnFactory,
}
if len(opts.Collector.Scheme) > 0 {
rec.address = opts.Collector.urlWithoutPath()
} else {
rec.address = opts.Collector.SocketAddress()
}
rec.dialOptions = append(rec.dialOptions, grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(opts.GRPCMaxCallSendMsgSizeBytes)))
if opts.Collector.Plaintext {
rec.dialOptions = append(rec.dialOptions, grpc.WithInsecure())
return rec, nil
}
if len(opts.Collector.CustomCACertFile) > 0 {
creds, err := credentials.NewClientTLSFromFile(opts.Collector.CustomCACertFile, "")
if err != nil {
return nil, err
}
rec.dialOptions = append(rec.dialOptions, grpc.WithTransportCredentials(creds))
} else {
rec.dialOptions = append(rec.dialOptions, grpc.WithTransportCredentials(credentials.NewClientTLSFromCert(nil, "")))
}
return rec, nil
}
func (client *grpcCollectorClient) ConnectClient() (Connection, error) {
now := time.Now()
var conn Connection
if client.grpcConnectorFactory != nil {
uncheckedClient, transport, err := client.grpcConnectorFactory()
if err != nil {
return nil, err
}
grpcClient, ok := uncheckedClient.(collectorpb.CollectorServiceClient)
if !ok {
return nil, fmt.Errorf("gRPC connector factory did not provide valid client")
}
conn = transport
client.grpcClient = grpcClient
} else {
transport, err := grpc.Dial(client.address, client.dialOptions...)
if err != nil {
return nil, err
}
conn = transport
client.grpcClient = collectorpb.NewCollectorServiceClient(transport)
}
client.connTimestamp = now
return conn, nil
}
func (client *grpcCollectorClient) ShouldReconnect() bool {
return time.Since(client.connTimestamp) > client.reconnectPeriod
}
func (client *grpcCollectorClient) Report(ctx context.Context, req reportRequest) (collectorResponse, error) {
if req.protoRequest == nil {
return nil, fmt.Errorf("protoRequest cannot be null")
}
ctx = metadata.NewOutgoingContext(
ctx,
metadata.Pairs(
accessTokenHeader,
client.accessToken,
),
)
resp, err := client.grpcClient.Report(ctx, req.protoRequest)
if err != nil {
return nil, err
}
return protoResponse{ReportResponse: resp}, nil
}
func (client *grpcCollectorClient) Translate(ctx context.Context, buffer *reportBuffer) (reportRequest, error) {
req := client.converter.toReportRequest(
client.reporterID,
client.attributes,
client.accessToken,
buffer,
)
return reportRequest{
protoRequest: req,
}, nil
}
type protoResponse struct {
*collectorpb.ReportResponse
}
func (res protoResponse) Disable() bool {
for _, command := range res.GetCommands() {
if command.Disable {
return true
}
}
return false
}
func (res protoResponse) DevMode() bool {
for _, command := range res.GetCommands() {
if command.DevMode {
return true
}
}
return false
}