trigger

Documentation

Index

• Constants
• func AppendEventDataToContext(parentCtx context.Context, data map[string]string) context.Context
• func ExtractEventDataFromContext(ctx context.Context) (map[string]string, bool)
• func Factories() map[string]Factory
• func GetHandleStartTimeFromContext(ctx context.Context) time.Time
• func GetHandlerEventIdFromContext(ctx context.Context) string
• func GetLogger(ref string) log.Logger
• func LegacyRegister(ref string, f Factory) error
• func NewContextWithEventId(parentCtx context.Context, eventId string) context.Context
• func NewHandlerContext(parentCtx context.Context, config *HandlerConfig) context.Context
• func PostHandlerEvent(hStatus Status, hName, tName string, data map[string]string)
• func PostTriggerEvent(tStatus Status, name string)
• func Register(trigger Trigger, f Factory) error
• type ActionConfig
• type Config
  • func (c *Config) FixUp(md *Metadata, resolver resolve.CompositeResolver) error
• type Descriptor
• type EventFlowControlAware
• type Factory
  • func GetFactory(ref string) Factory
• type Handler
  • func NewHandler(config *HandlerConfig, acts []action.Action, mf mapper.Factory, ...) (Handler, error)
• type HandlerConfig
  • func (hc *HandlerConfig) UnmarshalJSON(d []byte) error
• type HandlerEvent
• type HandlerEventConfig
• type HandlerInfo
  • func HandlerFromContext(ctx context.Context) (*HandlerInfo, bool)
• type InitContext
• type Metadata
  • func NewMetadata(mdStructs ...interface{}) *Metadata
• type ReconfigurableTrigger
• type SchemaConfig
• type Status
  • func (s Status) String() string
• type Trigger
• type TriggerEvent

Constants

const (
	INITIALIZING     = "Initializing"
	INITIALIZED      = "Initialized"
	INIT_FAILED      = "InitFailed"
	STARTED          = "Started"
	STOPPED          = "Stopped"
	FAILED           = "Failed"
	COMPLETED        = "Completed"
	TriggerEventType = "triggerevent"
)

Functions

func AppendEventDataToContext

func AppendEventDataToContext(parentCtx context.Context, data map[string]string) context.Context

NewContextWithEventData add event data to a new child context. This event data will be associated handler events.

func ExtractEventDataFromContext

func ExtractEventDataFromContext(ctx context.Context) (map[string]string, bool)

ExtractEventDataFromContext returns the event data stored in the context, if any.

func Factories

func Factories() map[string]Factory

func GetHandleStartTimeFromContext

func GetHandleStartTimeFromContext(ctx context.Context) time.Time

func GetHandlerEventIdFromContext

func GetHandlerEventIdFromContext(ctx context.Context) string

func GetLogger

func GetLogger(ref string) log.Logger

func LegacyRegister

func LegacyRegister(ref string, f Factory) error

DEPRECATED

func NewContextWithEventId

func NewContextWithEventId(parentCtx context.Context, eventId string) context.Context

NewContextWithEventId new context by adding event id to the context

func NewHandlerContext

func NewHandlerContext(parentCtx context.Context, config *HandlerConfig) context.Context

NewHandlerContext add the handler info to a new child context

func PostHandlerEvent

func PostHandlerEvent(hStatus Status, hName, tName string, data map[string]string)

Publish handler event

func PostTriggerEvent

func PostTriggerEvent(tStatus Status, name string)

func Register

func Register(trigger Trigger, f Factory) error

Types

type ActionConfig

type ActionConfig struct {
	*action.Config
	If     string                 `json:"if,omitempty"`
	Input  map[string]interface{} `json:"input,omitempty"`
	Output map[string]interface{} `json:"output,omitempty"`

	Act action.Action `json:"-,omitempty"`
}

ActionConfig is the configuration for the Action

type Config

type Config struct {
	Id       string                 `json:"id"`
	Ref      string                 `json:"ref"`
	Settings map[string]interface{} `json:"settings"`
	Handlers []*HandlerConfig       `json:"handlers"`

	//DEPRECATED
	Type string `json:"type,omitempty"`
}

Config is the configuration for a Trigger

func (*Config) FixUp

func (c *Config) FixUp(md *Metadata, resolver resolve.CompositeResolver) error

type Descriptor

type Descriptor struct {
	ID      string `json:"ref"`
	Version string `json:"version"`
}

type EventFlowControlAware

type EventFlowControlAware interface {
	// Resume suspended trigger
	Resume() error

	// Pause trigger
	Pause() error
}

EventFlowControlAware trigger can be paused or resumed by the engine

type Factory

type Factory interface {

	// Metadata returns the metadata of the trigger
	Metadata() *Metadata

	// New create a new Trigger
	New(config *Config) (Trigger, error)
}

Factory is used to create new instances of a trigger

func GetFactory

func GetFactory(ref string) Factory

type Handler

type Handler interface {
	Name() string
	Logger() log.Logger
	Settings() map[string]interface{}
	Schemas() *SchemaConfig
	Handle(ctx context.Context, triggerData interface{}) (map[string]interface{}, error)
}

func NewHandler

func NewHandler(config *HandlerConfig, acts []action.Action, mf mapper.Factory, ef expression.Factory, runner action.Runner, logger log.Logger) (Handler, error)

type HandlerConfig

type HandlerConfig struct {
	Name     string                 `json:"name,omitempty"`
	Settings map[string]interface{} `json:"settings"`
	Actions  []*ActionConfig        `json:"actions"`
	Schemas  *SchemaConfig          `json:"schemas,omitempty"`
	// contains filtered or unexported fields
}

func (*HandlerConfig) UnmarshalJSON

func (hc *HandlerConfig) UnmarshalJSON(d []byte) error

UnmarshalJSON overrides the default UnmarshalJSON for TaskInst

type HandlerEvent

type HandlerEvent interface {
	// Name of trigger this handler belongs to
	TriggerName() string
	// Name of the handler
	HandlerName() string
	// Status of handler. Valid status - INITIALIZED, STARTED, COMPLETED, FAILED
	Status() Status
	// Handler specific tags set by the underlying implementation e.g. method and path by REST trigger handler or
	// topic name by Kafka trigger handler. This is useful when peek view of trigger(and handlers) is desired.
	Tags() map[string]string
}

type HandlerEventConfig

type HandlerEventConfig interface {
	// SetDefaultEventData sets the default event data to use for a handler
	SetDefaultEventData(data map[string]string)
}

HandlerEventConfig is an interface that can be used to set the default event data that is used in handler events

type HandlerInfo

type HandlerInfo struct {
	Name      string
	EventId   string
	StartTime time.Time
}

func HandlerFromContext

func HandlerFromContext(ctx context.Context) (*HandlerInfo, bool)

HandlerFromContext returns the handler info stored in the context, if any.

type InitContext

type InitContext interface {

	// Logger the logger for the trigger
	Logger() log.Logger

	// GetHandlers gets the handlers associated with the trigger
	GetHandlers() []Handler
}

InitContext is the initialization context for the trigger instance

type Metadata

type Metadata struct {
	Settings        map[string]data.TypedValue
	HandlerSettings map[string]data.TypedValue
	Output          map[string]data.TypedValue
	Reply           map[string]data.TypedValue

	//DEPRECATED
	ID string
}

func NewMetadata

func NewMetadata(mdStructs ...interface{}) *Metadata

type ReconfigurableTrigger

type ReconfigurableTrigger interface {
	// Reconfigure is called to reconfigure trigger implementation
	Reconfigure(config *Config, handlers []Handler) error
}

ReconfigurableTrigger is object that supports dynamic reconfiguration of trigger

type SchemaConfig

type SchemaConfig struct {
	Output map[string]interface{} `json:"output,omitempty"`
	Reply  map[string]interface{} `json:"reply,omitempty"`
}

type Status

type Status string

func (Status) String

func (s Status) String() string

type Trigger

type Trigger interface {
	managed.Managed

	// Initialize is called to initialize the Trigger
	Initialize(ctx InitContext) error
}

Trigger is object that triggers/starts flow instances and is managed by an engine

type TriggerEvent

type TriggerEvent interface {
	// Name of trigger
	Name() string
	// Status of trigger. Valid status - INITIALIZING, INITIALIZED, STARTED, STOPPED, FAILED
	Status() Status
}

Trigger Event