node

package
v2.0.0-alpha.2 Latest Latest
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 Go to latest Published: Apr 28, 2024 License: Apache-2.0 Imports: 35 Imported by: 0

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Index

Constants

View Source 
const (
	WatermarkKey  = "$$wartermark"
	EventInputKey = "$$eventinputs"
	StreamWMKey   = "$$streamwms"
)
View Source 
const (
	WindowInputsKey = "$$windowInputs"
	TriggerTimeKey  = "$$triggerTime"
	MsgCountKey     = "$$msgCount"
)
View Source 
const BatchKey = "$$batchInputs"

Variables

This section is empty.

Functions

func SourcePing 

func SourcePing(sourceType string, config map[string]interface{}) error

Types

type BatchOp 

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

func NewBatchOp 

func NewBatchOp(name string, rOpt *def.RuleOption, batchSize, lingerInterval int) (*BatchOp, error)

func (BatchOp) AddInputCount 

func (o BatchOp) AddInputCount()

func (*BatchOp) Exec 

func (b *BatchOp) Exec(ctx api.StreamContext, errCh chan<- error)

func (BatchOp) GetInput 

func (o BatchOp) GetInput() (chan<- interface{}, string)

func (BatchOp) GetInputCount 

func (o BatchOp) GetInputCount() int

func (BatchOp) SetBarrierHandler 

func (o BatchOp) SetBarrierHandler(bh checkpoint.BarrierHandler)

type Collector 

type Collector interface {
	GetInput() (chan<- interface{}, string)
}

type CompressOp 

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

func NewCompressOp 

func NewCompressOp(name string, rOpt *def.RuleOption, compressMethod string) (*CompressOp, error)

func (CompressOp) AddInputCount 

func (o CompressOp) AddInputCount()

func (*CompressOp) Exec 

func (o *CompressOp) Exec(ctx api.StreamContext, errCh chan<- error)

func (CompressOp) GetInput 

func (o CompressOp) GetInput() (chan<- interface{}, string)

func (CompressOp) GetInputCount 

func (o CompressOp) GetInputCount() int

func (CompressOp) SetBarrierHandler 

func (o CompressOp) SetBarrierHandler(bh checkpoint.BarrierHandler)

func (*CompressOp) Worker 

func (o *CompressOp) Worker(_ api.StreamContext, item any) []any

type DataSinkNode 

type DataSinkNode interface {
	TopNode
	MetricNode
	Collector
	Exec(api.StreamContext, chan<- error)
	GetStreamContext() api.StreamContext
	GetInputCount() int
	AddInputCount()
	SetQos(def.Qos)
	SetBarrierHandler(checkpoint.BarrierHandler)
}

type DataSourceNode 

type DataSourceNode interface {
	TopNode
	MetricNode
	Emitter
	Open(ctx api.StreamContext, errCh chan<- error)
}

type DecodeOp 

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

func NewDecodeOp 

func NewDecodeOp(name, StreamName string, ruleId string, rOpt *def.RuleOption, options *ast.Options, isWildcard, isSchemaless bool, schema map[string]*ast.JsonStreamField) (*DecodeOp, error)

func (DecodeOp) AddInputCount 

func (o DecodeOp) AddInputCount()

func (*DecodeOp) AttachSchema 

func (o *DecodeOp) AttachSchema(ctx api.StreamContext, dataSource string, schema map[string]*ast.JsonStreamField, isWildcard bool)

func (*DecodeOp) DetachSchema 

func (o *DecodeOp) DetachSchema(ruleId string)

func (*DecodeOp) Exec 

func (o *DecodeOp) Exec(ctx api.StreamContext, errCh chan<- error)

Exec decode op receives raw data and converts it to message

func (DecodeOp) GetInput 

func (o DecodeOp) GetInput() (chan<- interface{}, string)

func (DecodeOp) GetInputCount 

func (o DecodeOp) GetInputCount() int

func (DecodeOp) SetBarrierHandler 

func (o DecodeOp) SetBarrierHandler(bh checkpoint.BarrierHandler)

func (*DecodeOp) Worker 

func (o *DecodeOp) Worker(ctx api.StreamContext, item any) []any

type DecompressOp 

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

func NewDecompressOp 

func NewDecompressOp(name string, rOpt *def.RuleOption, compressMethod string) (*DecompressOp, error)

func (DecompressOp) AddInputCount 

func (o DecompressOp) AddInputCount()

func (*DecompressOp) Exec 

func (o *DecompressOp) Exec(ctx api.StreamContext, errCh chan<- error)

func (DecompressOp) GetInput 

func (o DecompressOp) GetInput() (chan<- interface{}, string)

func (DecompressOp) GetInputCount 

func (o DecompressOp) GetInputCount() int

func (DecompressOp) SetBarrierHandler 

func (o DecompressOp) SetBarrierHandler(bh checkpoint.BarrierHandler)

func (*DecompressOp) Worker 

func (o *DecompressOp) Worker(_ api.StreamContext, item any) []any

type DedupTriggerNode 

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

func NewDedupTriggerNode 

func NewDedupTriggerNode(name string, options *def.RuleOption, aliasName string, startField string, endField string, nowField string, expire int64) *DedupTriggerNode

func (DedupTriggerNode) AddInputCount 

func (o DedupTriggerNode) AddInputCount()

func (*DedupTriggerNode) Exec 

func (w *DedupTriggerNode) Exec(ctx api.StreamContext, errCh chan<- error)

func (DedupTriggerNode) GetInput 

func (o DedupTriggerNode) GetInput() (chan<- interface{}, string)

func (DedupTriggerNode) GetInputCount 

func (o DedupTriggerNode) GetInputCount() int

func (DedupTriggerNode) SetBarrierHandler 

func (o DedupTriggerNode) SetBarrierHandler(bh checkpoint.BarrierHandler)

type Emitter 

type Emitter interface {
	AddOutput(chan<- interface{}, string) error
}

type EncodeOp 

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

func NewEncodeOp 

func NewEncodeOp(name string, rOpt *def.RuleOption, sc *SinkConf) (*EncodeOp, error)

func (EncodeOp) AddInputCount 

func (o EncodeOp) AddInputCount()

func (*EncodeOp) Exec 

func (o *EncodeOp) Exec(ctx api.StreamContext, errCh chan<- error)

Exec decode op receives map/[]map and converts it to bytes. If receiving bytes, just return it.

func (EncodeOp) GetInput 

func (o EncodeOp) GetInput() (chan<- interface{}, string)

func (EncodeOp) GetInputCount 

func (o EncodeOp) GetInputCount() int

func (EncodeOp) SetBarrierHandler 

func (o EncodeOp) SetBarrierHandler(bh checkpoint.BarrierHandler)

func (*EncodeOp) Worker 

func (o *EncodeOp) Worker(ctx api.StreamContext, item any) []any

type EncryptNode 

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

func NewEncryptOp 

func NewEncryptOp(name string, rOpt *def.RuleOption, encryptMethod string) (*EncryptNode, error)

func (EncryptNode) AddInputCount 

func (o EncryptNode) AddInputCount()

func (*EncryptNode) Exec 

func (o *EncryptNode) Exec(ctx api.StreamContext, errCh chan<- error)

func (EncryptNode) GetInput 

func (o EncryptNode) GetInput() (chan<- interface{}, string)

func (EncryptNode) GetInputCount 

func (o EncryptNode) GetInputCount() int

func (EncryptNode) SetBarrierHandler 

func (o EncryptNode) SetBarrierHandler(bh checkpoint.BarrierHandler)

func (*EncryptNode) Worker 

func (o *EncryptNode) Worker(_ api.StreamContext, item any) []any

type EventTimeTrigger 

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

EventTimeTrigger scans the input tuples and find out the tuples in the current window The inputs are sorted by watermark op

func NewEventTimeTrigger 

func NewEventTimeTrigger(window *WindowConfig) (*EventTimeTrigger, error)

type JoinAlignNode 

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

JoinAlignNode will block the stream and buffer all the table tuples. Once buffered, it will combine the later input with the buffer The input for batch table MUST be *WindowTuples

func NewJoinAlignNode 

func NewJoinAlignNode(name string, emitters []string, options *def.RuleOption) (*JoinAlignNode, error)

func (JoinAlignNode) AddInputCount 

func (o JoinAlignNode) AddInputCount()

func (*JoinAlignNode) Exec 

func (n *JoinAlignNode) Exec(ctx api.StreamContext, errCh chan<- error)

func (JoinAlignNode) GetInput 

func (o JoinAlignNode) GetInput() (chan<- interface{}, string)

func (JoinAlignNode) GetInputCount 

func (o JoinAlignNode) GetInputCount() int

func (JoinAlignNode) SetBarrierHandler 

func (o JoinAlignNode) SetBarrierHandler(bh checkpoint.BarrierHandler)

type LookupConf 

type LookupConf struct {
	Cache           bool `json:"cache"`
	CacheTTL        int  `json:"cacheTtl"`
	CacheMissingKey bool `json:"cacheMissingKey"`
}

type LookupNode 

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

LookupNode will look up the data from the external source when receiving an event

func NewLookupNode 

func NewLookupNode(name string, fields []string, keys []string, joinType ast.JoinType, vals []ast.Expr, srcOptions *ast.Options, options *def.RuleOption) (*LookupNode, error)

func (LookupNode) AddInputCount 

func (o LookupNode) AddInputCount()

func (*LookupNode) Exec 

func (n *LookupNode) Exec(ctx api.StreamContext, errCh chan<- error)

func (LookupNode) GetInput 

func (o LookupNode) GetInput() (chan<- interface{}, string)

func (LookupNode) GetInputCount 

func (o LookupNode) GetInputCount() int

func (LookupNode) SetBarrierHandler 

func (o LookupNode) SetBarrierHandler(bh checkpoint.BarrierHandler)

type MergeableTopo 

type MergeableTopo interface {
	GetSource() DataSourceNode
	// MergeSrc Add child topo as the source with following operators
	MergeSrc(parentTopo *def.PrintableTopo)
	// LinkTopo Add printable topo link from the parent topo to the child topo
	LinkTopo(parentTopo *def.PrintableTopo, parentJointName string)
	// SubMetrics return the metrics of the sub nodes
	SubMetrics() ([]string, []any)
	// Close notifies subtopo to deref
	Close(ruleId string)
}

type MetricNode 

type MetricNode interface {
	GetMetrics() []any
	RemoveMetrics(ruleId string)
}

type OperatorNode 

type OperatorNode interface {
	DataSinkNode
	Emitter
	Broadcast(data interface{})
}

type PriorityQueue 

type PriorityQueue []*TriggerRequest

func (*PriorityQueue) Peek 

func (pq *PriorityQueue) Peek() *TriggerRequest

func (*PriorityQueue) Pop 

func (pq *PriorityQueue) Pop() *TriggerRequest

Pop removes and returns the item with the highest priority from the priority queue

func (*PriorityQueue) Push 

func (pq *PriorityQueue) Push(x *TriggerRequest)

Push adds an item to the priority queue

type SchemaNode 

type SchemaNode interface {
	// AttachSchema attach the schema to the node. The parameters are ruleId, sourceName, schema, whether is wildcard
	AttachSchema(api.StreamContext, string, map[string]*ast.JsonStreamField, bool)
	// DetachSchema detach the schema from the node. The parameters are ruleId
	DetachSchema(string)
}

type SinkConf 

type SinkConf struct {
	Concurrency    int      `json:"concurrency"`
	Omitempty      bool     `json:"omitIfEmpty"`
	SendSingle     bool     `json:"sendSingle"`
	DataTemplate   string   `json:"dataTemplate"`
	Format         string   `json:"format"`
	SchemaId       string   `json:"schemaId"`
	Delimiter      string   `json:"delimiter"`
	BufferLength   int      `json:"bufferLength"`
	Fields         []string `json:"fields"`
	DataField      string   `json:"dataField"`
	BatchSize      int      `json:"batchSize"`
	LingerInterval int      `json:"lingerInterval"`
	Compression    string   `json:"compression"`
	Encryption     string   `json:"encryption"`
	conf.SinkConf
}

func ParseConf 

func ParseConf(logger api.Logger, props map[string]any) (*SinkConf, error)

type SinkNode 

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

SinkNode represents a sink node that collects data from the stream It typically only do connect and send. It does not do any processing. This node is the skeleton. It will refer to a sink instance to do the real work.

func NewBytesSinkNode 

func NewBytesSinkNode(ctx api.StreamContext, name string, sink api.BytesCollector, rOpt *def.RuleOption, eoflimit int) (*SinkNode, error)

NewBytesSinkNode creates a sink node that collects data from the stream. Do some static validation

func NewTupleSinkNode 

func NewTupleSinkNode(ctx api.StreamContext, name string, sink api.TupleCollector, rOpt *def.RuleOption, eoflimit int) (*SinkNode, error)

NewTupleSinkNode creates a sink node that collects data from the stream. Do some static validation

func (SinkNode) AddInputCount 

func (o SinkNode) AddInputCount()

func (*SinkNode) Exec 

func (s *SinkNode) Exec(ctx api.StreamContext, errCh chan<- error)

func (SinkNode) GetInput 

func (o SinkNode) GetInput() (chan<- interface{}, string)

func (SinkNode) GetInputCount 

func (o SinkNode) GetInputCount() int

func (SinkNode) SetBarrierHandler 

func (o SinkNode) SetBarrierHandler(bh checkpoint.BarrierHandler)

type SourceInstanceNode 

type SourceInstanceNode interface {
	GetSource() api.Source
}

type SourceNode 

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

SourceNode is a node that connects to an external source The SourceNode is an all-in-one source node that support connect and decode and more. The SourceConnectorNode is a node that only connects to external source and does not decode.

func NewSourceNode 

func NewSourceNode(ctx api.StreamContext, name string, ss api.Source, props map[string]any, rOpt *def.RuleOption) (*SourceNode, error)

NewSourceNode creates a SourceConnectorNode

func (SourceNode) AddOutput 

func (o SourceNode) AddOutput(output chan<- interface{}, name string) error

func (SourceNode) Broadcast 

func (o SourceNode) Broadcast(val interface{})

func (SourceNode) GetMetrics 

func (o SourceNode) GetMetrics() []any

func (SourceNode) GetName 

func (o SourceNode) GetName() string

func (SourceNode) GetStreamContext 

func (o SourceNode) GetStreamContext() api.StreamContext

func (*SourceNode) Open 

func (m *SourceNode) Open(ctx api.StreamContext, ctrlCh chan<- error)

Open will be invoked by topo. It starts reading data.

func (SourceNode) RemoveMetrics 

func (o SourceNode) RemoveMetrics(ruleId string)

func (*SourceNode) Run 

func (m *SourceNode) Run(ctx api.StreamContext, ctrlCh chan<- error)

Run Subscribe could be a long-running function

func (SourceNode) SetQos 

func (o SourceNode) SetQos(qos def.Qos)

type SwitchConfig 

type SwitchConfig struct {
	Cases            []ast.Expr
	StopAtFirstMatch bool
}

type SwitchNode 

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

func NewSwitchNode 

func NewSwitchNode(name string, conf *SwitchConfig, options *def.RuleOption) (*SwitchNode, error)

func (SwitchNode) AddInputCount 

func (o SwitchNode) AddInputCount()

func (*SwitchNode) AddOutput 

func (n *SwitchNode) AddOutput(output chan<- interface{}, name string) error

AddOutput SwitchNode overrides the defaultSinkNode's AddOutput to add output to the outputNodes SwitchNode itself has multiple outlets defined by the outputNodes. This default function will add the output to the first outlet

func (*SwitchNode) Exec 

func (n *SwitchNode) Exec(ctx api.StreamContext, errCh chan<- error)

func (*SwitchNode) GetEmitter 

func (n *SwitchNode) GetEmitter(outputIndex int) Emitter

GetEmitter returns the nth emitter of the node. SwtichNode is the only node that has multiple emitters In planner graph, fromNodes is a multi-dim array, switch node is the only node that could be in the second dim The dim is the index

func (SwitchNode) GetInput 

func (o SwitchNode) GetInput() (chan<- interface{}, string)

func (SwitchNode) GetInputCount 

func (o SwitchNode) GetInputCount() int

func (SwitchNode) SetBarrierHandler 

func (o SwitchNode) SetBarrierHandler(bh checkpoint.BarrierHandler)

type TopNode 

type TopNode interface {
	GetName() string
}

type TransformOp 

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

func NewTransformOp 

func NewTransformOp(name string, rOpt *def.RuleOption, sc *SinkConf) (*TransformOp, error)

NewTransformOp creates a transform node sink conf should have been validated before

func (TransformOp) AddInputCount 

func (o TransformOp) AddInputCount()

func (*TransformOp) Exec 

func (t *TransformOp) Exec(ctx api.StreamContext, errCh chan<- error)

func (TransformOp) GetInput 

func (o TransformOp) GetInput() (chan<- interface{}, string)

func (TransformOp) GetInputCount 

func (o TransformOp) GetInputCount() int

func (TransformOp) SetBarrierHandler 

func (o TransformOp) SetBarrierHandler(bh checkpoint.BarrierHandler)

func (*TransformOp) Worker 

func (t *TransformOp) Worker(ctx api.StreamContext, item any) []any

Worker do not need to process error and control messages

type TriggerRequest 

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

type TupleList 

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

func NewTupleList 

func NewTupleList(tuples []*xsql.Tuple, windowSize int) (TupleList, error)

type UnFunc 

type UnFunc func(api.StreamContext, interface{}) interface{}

UnFunc implements UnOperation as type func (context.Context, interface{})

func (UnFunc) Apply 

func (f UnFunc) Apply(ctx api.StreamContext, data interface{}) interface{}

Apply implements UnOperation.Apply method

type UnOperation 

type UnOperation interface {
	Apply(ctx api.StreamContext, data interface{}, fv *xsql.FunctionValuer, afv *xsql.AggregateFunctionValuer) interface{}
}

UnOperation interface represents unary operations (i.e. Map, Filter, etc)

type UnaryOperator 

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

func New 

func New(name string, options *def.RuleOption) *UnaryOperator

New NewUnary creates *UnaryOperator value

func (UnaryOperator) AddInputCount 

func (o UnaryOperator) AddInputCount()

func (*UnaryOperator) Exec 

func (o *UnaryOperator) Exec(ctx api.StreamContext, errCh chan<- error)

Exec is the entry point for the executor

func (UnaryOperator) GetInput 

func (o UnaryOperator) GetInput() (chan<- interface{}, string)

func (UnaryOperator) GetInputCount 

func (o UnaryOperator) GetInputCount() int

func (UnaryOperator) SetBarrierHandler 

func (o UnaryOperator) SetBarrierHandler(bh checkpoint.BarrierHandler)

func (*UnaryOperator) SetOperation 

func (o *UnaryOperator) SetOperation(op UnOperation)

SetOperation sets the executor operation

type WatermarkOp 

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

WatermarkOp is used when event time is enabled. It is used to align the event time of the input streams It sends out the data in time order with watermark.

func NewWatermarkOp 

func NewWatermarkOp(name string, sendWatermark bool, streams []string, options *def.RuleOption) *WatermarkOp

func (WatermarkOp) AddInputCount 

func (o WatermarkOp) AddInputCount()

func (*WatermarkOp) Exec 

func (w *WatermarkOp) Exec(ctx api.StreamContext, errCh chan<- error)

func (WatermarkOp) GetInput 

func (o WatermarkOp) GetInput() (chan<- interface{}, string)

func (WatermarkOp) GetInputCount 

func (o WatermarkOp) GetInputCount() int

func (WatermarkOp) SetBarrierHandler 

func (o WatermarkOp) SetBarrierHandler(bh checkpoint.BarrierHandler)

type WindowConfig 

type WindowConfig struct {
	TriggerCondition ast.Expr
	StateFuncs       []*ast.Call
	Type             ast.WindowType
	Length           int64
	Interval         int64 // If the interval is not set, it is equals to Length
	Delay            int64
	RawInterval      int
	TimeUnit         ast.Token
}

type WindowOperator 

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

func NewWindowOp 

func NewWindowOp(name string, w WindowConfig, options *def.RuleOption) (*WindowOperator, error)

func (WindowOperator) AddInputCount 

func (o WindowOperator) AddInputCount()

func (*WindowOperator) Exec 

func (o *WindowOperator) Exec(ctx api.StreamContext, errCh chan<- error)

Exec is the entry point for the executor input: *xsql.Tuple from preprocessor output: xsql.WindowTuplesSet

func (WindowOperator) GetInput 

func (o WindowOperator) GetInput() (chan<- interface{}, string)

func (WindowOperator) GetInputCount 

func (o WindowOperator) GetInputCount() int

func (WindowOperator) SetBarrierHandler 

func (o WindowOperator) SetBarrierHandler(bh checkpoint.BarrierHandler)

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