datastreams

package
v2.0.0-beta.8 Latest Latest
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 Go to latest Published: Nov 8, 2024 License: Apache-2.0, BSD-3-Clause, Apache-2.0 Imports: 29 Imported by: 0

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Index

Constants

View Source 
const (
	// PropagationKeyBase64 is the key to use to propagate the pathway between services.
	PropagationKeyBase64 = "dd-pathway-ctx-base64"
)

Variables

This section is empty.

Functions

func ContextWithPathway 

func ContextWithPathway(ctx context.Context, p Pathway) context.Context

ContextWithPathway returns a copy of the given context which includes the pathway p.

Types

type Backlog 

type Backlog struct {
	// Tags that identify the backlog
	Tags []string
	// Value of the backlog
	Value int64
}

Backlog represents the size of a queue that hasn't been yet read by the consumer.

func (*Backlog) DecodeMsg 

func (z *Backlog) DecodeMsg(dc *msgp.Reader) (err error)

DecodeMsg implements msgp.Decodable

func (*Backlog) EncodeMsg 

func (z *Backlog) EncodeMsg(en *msgp.Writer) (err error)

EncodeMsg implements msgp.Encodable

func (*Backlog) Msgsize 

func (z *Backlog) Msgsize() (s int)

Msgsize returns an upper bound estimate of the number of bytes occupied by the serialized message

type CommitOffset 

type CommitOffset struct {
	ConsumerGroup string
	Topic         string
	Partition     int32
	Offset        int64
}

func (*CommitOffset) DecodeMsg 

func (z *CommitOffset) DecodeMsg(dc *msgp.Reader) (err error)

DecodeMsg implements msgp.Decodable

func (*CommitOffset) EncodeMsg 

func (z *CommitOffset) EncodeMsg(en *msgp.Writer) (err error)

EncodeMsg implements msgp.Encodable

func (*CommitOffset) Msgsize 

func (z *CommitOffset) Msgsize() (s int)

Msgsize returns an upper bound estimate of the number of bytes occupied by the serialized message

type Pathway 

type Pathway struct {
	// contains filtered or unexported fields
}

Pathway is used to monitor how payloads are sent across different services. An example Pathway would be: service A -- edge 1 --> service B -- edge 2 --> service C So it's a branch of services (we also call them "nodes") connected via edges. As the payload is sent around, we save the start time (start of service A), and the start time of the previous service. This allows us to measure the latency of each edge, as well as the latency from origin of any service.

func Decode 

func Decode(ctx context.Context, data []byte) (p Pathway, outCtx context.Context, err error)

Decode decodes a pathway

func DecodeBase64 

func DecodeBase64(ctx context.Context, str string) (p Pathway, outCtx context.Context, err error)

DecodeBase64 decodes a pathway context from a string using base64 encoding.

func Merge 

func Merge(pathways []Pathway) Pathway

Merge merges multiple pathways into one. The current implementation samples one resulting Pathway. A future implementation could be more clever and actually merge the Pathways.

func PathwayFromContext 

func PathwayFromContext(ctx context.Context) (p Pathway, ok bool)

PathwayFromContext returns the pathway contained in the given context, and whether a pathway is found in ctx.

func (Pathway) EdgeStart 

func (p Pathway) EdgeStart() time.Time

func (Pathway) Encode 

func (p Pathway) Encode() []byte

Encode encodes the pathway

func (Pathway) EncodeBase64 

func (p Pathway) EncodeBase64() string

EncodeBase64 encodes a pathway context into a string using base64 encoding.

func (Pathway) GetHash 

func (p Pathway) GetHash() uint64

GetHash gets the hash of a pathway.

func (Pathway) PathwayStart 

func (p Pathway) PathwayStart() time.Time

PathwayStart returns the start timestamp of the pathway

type Processor 

type Processor struct {
	// contains filtered or unexported fields
}

func NewProcessor 

func NewProcessor(statsd internal.StatsdClient, env, service, version string, agentURL *url.URL, httpClient *http.Client) *Processor

func (*Processor) Flush 

func (p *Processor) Flush()

Flush triggers a flush and waits for it to complete.

func (*Processor) SetCheckpoint 

func (p *Processor) SetCheckpoint(ctx context.Context, edgeTags ...string) context.Context

func (*Processor) SetCheckpointWithParams 

func (p *Processor) SetCheckpointWithParams(ctx context.Context, params options.CheckpointParams, edgeTags ...string) context.Context

func (*Processor) Start 

func (p *Processor) Start()

func (*Processor) Stop 

func (p *Processor) Stop()

func (*Processor) TrackKafkaCommitOffset 

func (p *Processor) TrackKafkaCommitOffset(group string, topic string, partition int32, offset int64)

func (*Processor) TrackKafkaHighWatermarkOffset 

func (p *Processor) TrackKafkaHighWatermarkOffset(_ string, topic string, partition int32, offset int64)

TrackKafkaHighWatermarkOffset should be used in the consumer, to track the high watermark offsets of each partition. The first argument is the Kafka cluster ID, and will be used later.

func (*Processor) TrackKafkaProduceOffset 

func (p *Processor) TrackKafkaProduceOffset(topic string, partition int32, offset int64)

type ProduceOffset 

type ProduceOffset struct {
	Topic     string
	Partition int32
	Offset    int64
}

func (*ProduceOffset) DecodeMsg 

func (z *ProduceOffset) DecodeMsg(dc *msgp.Reader) (err error)

DecodeMsg implements msgp.Decodable

func (ProduceOffset) EncodeMsg 

func (z ProduceOffset) EncodeMsg(en *msgp.Writer) (err error)

EncodeMsg implements msgp.Encodable

func (ProduceOffset) Msgsize 

func (z ProduceOffset) Msgsize() (s int)

Msgsize returns an upper bound estimate of the number of bytes occupied by the serialized message

type StatsBucket 

type StatsBucket struct {
	// Start specifies the beginning of this bucket in unix nanoseconds.
	Start uint64
	// Duration specifies the duration of this bucket in nanoseconds.
	Duration uint64
	// Stats contains a set of statistics computed for the duration of this bucket.
	Stats []StatsPoint
	// Backlogs store information used to compute queue backlog
	Backlogs []Backlog
}

StatsBucket specifies a set of stats computed over a duration.

func (*StatsBucket) DecodeMsg 

func (z *StatsBucket) DecodeMsg(dc *msgp.Reader) (err error)

DecodeMsg implements msgp.Decodable

func (*StatsBucket) EncodeMsg 

func (z *StatsBucket) EncodeMsg(en *msgp.Writer) (err error)

EncodeMsg implements msgp.Encodable

func (*StatsBucket) Msgsize 

func (z *StatsBucket) Msgsize() (s int)

Msgsize returns an upper bound estimate of the number of bytes occupied by the serialized message

type StatsPayload 

type StatsPayload struct {
	// Env specifies the env. of the application, as defined by the user.
	Env string
	// Service is the service of the application
	Service string
	// Stats holds all stats buckets computed within this payload.
	Stats []StatsBucket
	// TracerVersion is the version of the tracer
	TracerVersion string
	// Lang is the language of the tracer
	Lang string
	// Version is the version of the service
	Version string
}

StatsPayload stores client computed stats.

func (*StatsPayload) DecodeMsg 

func (z *StatsPayload) DecodeMsg(dc *msgp.Reader) (err error)

DecodeMsg implements msgp.Decodable

func (*StatsPayload) EncodeMsg 

func (z *StatsPayload) EncodeMsg(en *msgp.Writer) (err error)

EncodeMsg implements msgp.Encodable

func (*StatsPayload) Msgsize 

func (z *StatsPayload) Msgsize() (s int)

Msgsize returns an upper bound estimate of the number of bytes occupied by the serialized message

type StatsPoint 

type StatsPoint struct {
	// These fields indicate the properties under which the stats were aggregated.
	Service    string // deprecated
	EdgeTags   []string
	Hash       uint64
	ParentHash uint64
	// These fields specify the stats for the above aggregation.
	// those are distributions of latency in seconds.
	PathwayLatency []byte
	EdgeLatency    []byte
	PayloadSize    []byte
	TimestampType  TimestampType
}

StatsPoint contains a set of statistics grouped under various aggregation keys.

func (*StatsPoint) DecodeMsg 

func (z *StatsPoint) DecodeMsg(dc *msgp.Reader) (err error)

DecodeMsg implements msgp.Decodable

func (*StatsPoint) EncodeMsg 

func (z *StatsPoint) EncodeMsg(en *msgp.Writer) (err error)

EncodeMsg implements msgp.Encodable

func (*StatsPoint) Msgsize 

func (z *StatsPoint) Msgsize() (s int)

Msgsize returns an upper bound estimate of the number of bytes occupied by the serialized message

type TimestampType 

type TimestampType string

TimestampType can be either current or origin. 

const (
	// TimestampTypeCurrent is for when the recorded timestamp is based on the
	// timestamp of the current StatsPoint.
	TimestampTypeCurrent TimestampType = "current"
	// TimestampTypeOrigin is for when the recorded timestamp is based on the
	// time that the first StatsPoint in the pathway is sent out.
	TimestampTypeOrigin TimestampType = "origin"
)

func (*TimestampType) DecodeMsg 

func (z *TimestampType) DecodeMsg(dc *msgp.Reader) (err error)

DecodeMsg implements msgp.Decodable

func (TimestampType) EncodeMsg 

func (z TimestampType) EncodeMsg(en *msgp.Writer) (err error)

EncodeMsg implements msgp.Encodable

func (TimestampType) Msgsize 

func (z TimestampType) Msgsize() (s int)

Msgsize returns an upper bound estimate of the number of bytes occupied by the serialized message

Source Files

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