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Index

• type Checkable
• type Metricable
• type MetricsCollector
• type Runnable
• type Taggable
• type Tagged
  • func NewTagged(tags ...*tag.Tag) *Tagged
  • func (t *Tagged) Context(ctx context.Context, tags ...*tag.Tag) context.Context
  • func (t *Tagged) WithTags(tags ...*tag.Tag)

Types

type Checkable

type Checkable interface {
	// Ready should return nil if the service is ready to accept traffic
	// Otherwise, it should return an error
	//
	// Ready is called by the App only when the service is Running (after successful Start() and before calling Stop())
	Ready(ctx context.Context) error
}

Checkable is a service that can expose its health status

type Metricable

type Metricable interface {
	// SetMetrics sets the metrics for the service
	SetMetrics(system, subsystem string, tags ...*tag.Tag)
}

Metricable is a service that can set its metrics

type MetricsCollector

type MetricsCollector interface {
	Describe(ch chan<- *prometheus.Desc)
	Collect(ch chan<- prometheus.Metric)
}

MetricsCollector is a service that can collect metrics It is the same interface as prometheus.Collector

type Runnable

type Runnable interface {
	// Start long living task(s)
	// It SHOULD return an error if the service can not start successfully
	// In case the context is canceled or times out, the service SHOULD return an error ASAP
	//
	// App ensures that Start is called only once
	// App ensures that all service's dependencies have been successfully started before calling Start
	Start(context.Context) error

	// Stop long living task(s)
	// It SHOULD attempt to gracefully stop and clean its internal state and return an error if it can not do so
	// In case the context is canceled or times out, the service should return an error ASAP
	//
	// App ensures that Stop is called only once
	Stop(context.Context) error
}

Runnable is an interface for any service that maintains long living task(s)

type Taggable

type Taggable interface {
	// AttachTags attaches tags to the service
	WithTags(tags ...*tag.Tag)
}

Taggable is a service that can get tags attached to it

type Tagged

type Tagged struct {
	tag.Set
	// contains filtered or unexported fields
}

func NewTagged

func NewTagged(tags ...*tag.Tag) *Tagged

func (*Tagged) Context

func (t *Tagged) Context(ctx context.Context, tags ...*tag.Tag) context.Context

func (*Tagged) WithTags

func (t *Tagged) WithTags(tags ...*tag.Tag)