func OutgoingTags(ctx context.Context) []byte
OutgoingTags returns the tags from the context for the outbound RPC.
This is intended for gRPC-internal use ONLY.
func OutgoingTrace(ctx context.Context) []byte
OutgoingTrace returns the trace from the context for the outbound RPC. It is intended for gRPC-internal use.
func SetIncomingTags(ctx context.Context, b []byte) context.Context
SetIncomingTags attaches stats tagging data to the context, to be read by the application (not sent in outgoing RPCs).
This is intended for gRPC-internal use ONLY.
func SetIncomingTrace(ctx context.Context, b []byte) context.Context
SetIncomingTrace attaches stats tagging data to the context, to be read by the application (not sent in outgoing RPCs). It is intended for gRPC-internal use.
func SetTags(ctx context.Context, b []byte) context.Context
SetTags attaches stats tagging data to the context, which will be sent in the outgoing RPC with the header grpc-tags-bin. Subsequent calls to SetTags will overwrite the values from earlier calls.
NOTE: this is provided only for backward compatibility with existing clients and will likely be removed in an upcoming release. New uses should transmit this type of data using metadata with a different, non-reserved (i.e. does not begin with "grpc-") header name.
func SetTrace(ctx context.Context, b []byte) context.Context
SetTrace attaches stats tagging data to the context, which will be sent in the outgoing RPC with the header grpc-trace-bin. Subsequent calls to SetTrace will overwrite the values from earlier calls.
NOTE: this is provided only for backward compatibility with existing clients and will likely be removed in an upcoming release. New uses should transmit this type of data using metadata with a different, non-reserved (i.e. does not begin with "grpc-") header name.
func Tags(ctx context.Context) []byte
Tags returns the tags from the context for the inbound RPC.
NOTE: this is provided only for backward compatibility with existing clients and will likely be removed in an upcoming release. New uses should transmit this type of data using metadata with a different, non-reserved (i.e. does not begin with "grpc-") header name.
func Trace(ctx context.Context) []byte
Trace returns the trace from the context for the inbound RPC.
NOTE: this is provided only for backward compatibility with existing clients and will likely be removed in an upcoming release. New uses should transmit this type of data using metadata with a different, non-reserved (i.e. does not begin with "grpc-") header name.
Begin contains stats when an RPC attempt begins. FailFast is only valid if this Begin is from client side.
type Begin struct {
// Client is true if this Begin is from client side.
Client bool
// BeginTime is the time when the RPC attempt begins.
BeginTime time.Time
// FailFast indicates if this RPC is failfast.
FailFast bool
// IsClientStream indicates whether the RPC is a client streaming RPC.
IsClientStream bool
// IsServerStream indicates whether the RPC is a server streaming RPC.
IsServerStream bool
// IsTransparentRetryAttempt indicates whether this attempt was initiated
// due to transparently retrying a previous attempt.
IsTransparentRetryAttempt bool
}
func (s *Begin) IsClient() bool
IsClient indicates if the stats information is from client side.
ConnBegin contains the stats of a connection when it is established.
type ConnBegin struct {
// Client is true if this ConnBegin is from client side.
Client bool
}
func (s *ConnBegin) IsClient() bool
IsClient indicates if this is from client side.
ConnEnd contains the stats of a connection when it ends.
type ConnEnd struct {
// Client is true if this ConnEnd is from client side.
Client bool
}
func (s *ConnEnd) IsClient() bool
IsClient indicates if this is from client side.
ConnStats contains stats information about connections.
type ConnStats interface {
// IsClient returns true if this ConnStats is from client side.
IsClient() bool
// contains filtered or unexported methods
}
ConnTagInfo defines the relevant information needed by connection context tagger.
type ConnTagInfo struct {
// RemoteAddr is the remote address of the corresponding connection.
RemoteAddr net.Addr
// LocalAddr is the local address of the corresponding connection.
LocalAddr net.Addr
}
End contains stats when an RPC ends.
type End struct {
// Client is true if this End is from client side.
Client bool
// BeginTime is the time when the RPC began.
BeginTime time.Time
// EndTime is the time when the RPC ends.
EndTime time.Time
// Trailer contains the trailer metadata received from the server. This
// field is only valid if this End is from the client side.
// Deprecated: use Trailer in InTrailer instead.
Trailer metadata.MD
// Error is the error the RPC ended with. It is an error generated from
// status.Status and can be converted back to status.Status using
// status.FromError if non-nil.
Error error
}
func (s *End) IsClient() bool
IsClient indicates if this is from client side.
Handler defines the interface for the related stats handling (e.g., RPCs, connections).
type Handler interface {
// TagRPC can attach some information to the given context.
// The context used for the rest lifetime of the RPC will be derived from
// the returned context.
TagRPC(context.Context, *RPCTagInfo) context.Context
// HandleRPC processes the RPC stats.
HandleRPC(context.Context, RPCStats)
// TagConn can attach some information to the given context.
// The returned context will be used for stats handling.
// For conn stats handling, the context used in HandleConn for this
// connection will be derived from the context returned.
// For RPC stats handling,
// - On server side, the context used in HandleRPC for all RPCs on this
// connection will be derived from the context returned.
// - On client side, the context is not derived from the context returned.
TagConn(context.Context, *ConnTagInfo) context.Context
// HandleConn processes the Conn stats.
HandleConn(context.Context, ConnStats)
}
InHeader contains stats when a header is received.
type InHeader struct {
// Client is true if this InHeader is from client side.
Client bool
// WireLength is the wire length of header.
WireLength int
// Compression is the compression algorithm used for the RPC.
Compression string
// Header contains the header metadata received.
Header metadata.MD
// The following fields are valid only if Client is false.
// FullMethod is the full RPC method string, i.e., /package.service/method.
FullMethod string
// RemoteAddr is the remote address of the corresponding connection.
RemoteAddr net.Addr
// LocalAddr is the local address of the corresponding connection.
LocalAddr net.Addr
}
func (s *InHeader) IsClient() bool
IsClient indicates if the stats information is from client side.
InPayload contains the information for an incoming payload.
type InPayload struct {
// Client is true if this InPayload is from client side.
Client bool
// Payload is the payload with original type. This may be modified after
// the call to HandleRPC which provides the InPayload returns and must be
// copied if needed later.
Payload any
// Data is the serialized message payload.
// Deprecated: Data will be removed in the next release.
Data []byte
// Length is the size of the uncompressed payload data. Does not include any
// framing (gRPC or HTTP/2).
Length int
// CompressedLength is the size of the compressed payload data. Does not
// include any framing (gRPC or HTTP/2). Same as Length if compression not
// enabled.
CompressedLength int
// WireLength is the size of the compressed payload data plus gRPC framing.
// Does not include HTTP/2 framing.
WireLength int
// RecvTime is the time when the payload is received.
RecvTime time.Time
}
func (s *InPayload) IsClient() bool
IsClient indicates if the stats information is from client side.
InTrailer contains stats when a trailer is received.
type InTrailer struct {
// Client is true if this InTrailer is from client side.
Client bool
// WireLength is the wire length of trailer.
WireLength int
// Trailer contains the trailer metadata received from the server. This
// field is only valid if this InTrailer is from the client side.
Trailer metadata.MD
}
func (s *InTrailer) IsClient() bool
IsClient indicates if the stats information is from client side.
OutHeader contains stats when a header is sent.
type OutHeader struct {
// Client is true if this OutHeader is from client side.
Client bool
// Compression is the compression algorithm used for the RPC.
Compression string
// Header contains the header metadata sent.
Header metadata.MD
// The following fields are valid only if Client is true.
// FullMethod is the full RPC method string, i.e., /package.service/method.
FullMethod string
// RemoteAddr is the remote address of the corresponding connection.
RemoteAddr net.Addr
// LocalAddr is the local address of the corresponding connection.
LocalAddr net.Addr
}
func (s *OutHeader) IsClient() bool
IsClient indicates if this stats information is from client side.
OutPayload contains the information for an outgoing payload.
type OutPayload struct {
// Client is true if this OutPayload is from client side.
Client bool
// Payload is the payload with original type. This may be modified after
// the call to HandleRPC which provides the OutPayload returns and must be
// copied if needed later.
Payload any
// Data is the serialized message payload.
// Deprecated: Data will be removed in the next release.
Data []byte
// Length is the size of the uncompressed payload data. Does not include any
// framing (gRPC or HTTP/2).
Length int
// CompressedLength is the size of the compressed payload data. Does not
// include any framing (gRPC or HTTP/2). Same as Length if compression not
// enabled.
CompressedLength int
// WireLength is the size of the compressed payload data plus gRPC framing.
// Does not include HTTP/2 framing.
WireLength int
// SentTime is the time when the payload is sent.
SentTime time.Time
}
func (s *OutPayload) IsClient() bool
IsClient indicates if this stats information is from client side.
OutTrailer contains stats when a trailer is sent.
type OutTrailer struct {
// Client is true if this OutTrailer is from client side.
Client bool
// WireLength is the wire length of trailer.
//
// Deprecated: This field is never set. The length is not known when this message is
// emitted because the trailer fields are compressed with hpack after that.
WireLength int
// Trailer contains the trailer metadata sent to the client. This
// field is only valid if this OutTrailer is from the server side.
Trailer metadata.MD
}
func (s *OutTrailer) IsClient() bool
IsClient indicates if this stats information is from client side.
PickerUpdated indicates that the LB policy provided a new picker while the RPC was waiting for one.
type PickerUpdated struct{}
func (*PickerUpdated) IsClient() bool
IsClient indicates if the stats information is from client side. Only Client Side interfaces with a Picker, thus always returns true.
RPCStats contains stats information about RPCs.
type RPCStats interface {
// IsClient returns true if this RPCStats is from client side.
IsClient() bool
// contains filtered or unexported methods
}
RPCTagInfo defines the relevant information needed by RPC context tagger.
type RPCTagInfo struct {
// FullMethodName is the RPC method in the format of /package.service/method.
FullMethodName string
// FailFast indicates if this RPC is failfast.
// This field is only valid on client side, it's always false on server side.
FailFast bool
}