import "go.chromium.org/luci/logdog/client/butlerlib/streamproto"
Package streamproto describes the protocol primitives used by LogDog/Butler for stream negotiation.
A LogDog Butler client wishing to create a new LogDog stream can use the Flags type to configure/send the stream.
Internally, LogDog represents the Flags properties with the Properties type.
doc.go magic.go properties.go streamName.go streamType.go tag.go tee.go
var (
// ProtocolFrameHeaderMagic is the number at the beginning of streams that
// identifies the stream handshake version.
//
// This serves two purposes:
// - To disambiguate a Butler stream from some happenstance string of bytes
// (which probably won't start with these characters).
// - To allow an upgrade to the wire format, if one is ever needed. e.g.,
// a switch to something other than recordio/JSON.
ProtocolFrameHeaderMagic = []byte("BTLR1\x1E")
)var (
// StreamTypeFlagEnum maps configuration strings to their underlying StreamTypes.
StreamTypeFlagEnum = flagenum.Enum{
"text": StreamType(logpb.StreamType_TEXT),
"binary": StreamType(logpb.StreamType_BINARY),
"datagram": StreamType(logpb.StreamType_DATAGRAM),
}
)var (
// TeeTypeFlagEnum is a flag- and JSON-compatible enumeration mapping
// TeeType configuration strings to their underlying TeeType values.
TeeTypeFlagEnum = flagenum.Enum{
"none": TeeNone,
"stdout": TeeStdout,
"stderr": TeeStderr,
}
)type Flags struct {
Name StreamNameFlag `json:"name,omitempty"`
ContentType string `json:"contentType,omitempty"`
Type StreamType `json:"type,omitempty"`
Timestamp clockflag.Time `json:"timestamp,omitempty"`
Tags TagMap `json:"tags,omitempty"`
BinaryFileExtension string `json:"binaryFileExtension,omitempty"`
IOKeepAlive bool `json:"ioKeepAlive,omitempty"`
Tee TeeType `json:"tee,omitempty"`
Timeout clockflag.Duration `json:"timeout,omitempty"`
Deadline clockflag.Duration `json:"deadline,omitempty"`
}Flags is a flag- and JSON-compatible collapse of Properties. It is used for stream negotiation protocol and command-line interfaces.
func (f *Flags) Properties() *Properties
Properties converts the Flags to a standard Properties structure.
If the values are not valid, this conversion will return an error.
type Properties struct {
// The log stream's descriptor.
//
// Note that the Prefix value, if filled, will be overridden by the Butler's
// Prefix.
*logpb.LogStreamDescriptor
// Tee is the tee configuration for this stream. If empty, the stream will
// not be tee'd.
Tee TeeType
// Timeout, if specified, is the stream timeout. If a read happens without
// filling the buffer, it will prematurely return after this period.
Timeout time.Duration
// Deadline, if set, specifies the maximum amount of time that data from this
// Stream can be buffered before being sent to its Output.
//
// Note that this value is best-effort, as it is subject to the constraints
// of the underlying transport medium.
Deadline time.Duration
}Properties is the set of properties needed to define a LogDog Butler Stream.
func (p *Properties) Clone() *Properties
Clone returns a fully-independent clone of this Properties object.
func (p *Properties) Validate() error
Validate validates that the configured Properties are valid and sufficient to create a Butler stream.
It skips stream Prefix validation and instead asserts that it is empty, as it should not be populated when Properties are defined.
type StreamNameFlag types.StreamName
StreamNameFlag is a flag and JSON-compatible type that converts to/from a types.StreamName. StreamName validation is part of the conversion.
func (f StreamNameFlag) MarshalJSON() ([]byte, error)
MarshalJSON implements json.Marshaler.
func (f *StreamNameFlag) Set(v string) error
Set implements flag.Value.
func (f *StreamNameFlag) String() string
String implements flag.Value.
func (f *StreamNameFlag) UnmarshalJSON(data []byte) error
UnmarshalJSON implements json.Unmarshaler.
type StreamType logpb.StreamType
StreamType is a flag- and JSON-compatible wrapper around the StreamType protobuf field.
func (t StreamType) DefaultContentType() types.ContentType
DefaultContentType returns the default ContentType for a given stream type.
func (t StreamType) MarshalJSON() ([]byte, error)
MarshalJSON implements json.Marshaler.
func (t *StreamType) Set(v string) error
Set implements flag.Value.
func (t *StreamType) String() string
String implements flag.Value.
func (t *StreamType) UnmarshalJSON(data []byte) error
UnmarshalJSON implements json.Unmarshaler.
type TagMap stringmapflag.Value
TagMap is a flags-compatible map used to store stream tags.
MarshalJSON implements the json.Marshaler interface.
Set implements flag.Value
SortedKeys returns a sorted slice of the keys in a TagMap.
String implements flag.Value.
UnmarshalJSON implements the json.Unmarshaler interface.
TeeType is an enumeration of tee configuration options.
const (
// TeeNone indicates that no teeing should be performed on the stream.
TeeNone TeeType = iota
// TeeStdout configures the stream to tee data through STDOUT.
TeeStdout
// TeeStderr configures the stream to tee data through STDERR.
TeeStderr
)MarshalJSON implements json.Marshaler.
Set implements flag.Value.
String implements flag.Value.
UnmarshalJSON implements json.Unmarshaler.
Writer returns the io.Writer object
Package streamproto imports 14 packages (graph) and is imported by 21 packages. Updated 2019-04-20. Refresh now. Tools for package owners.