

# events

`import "github.com/cometbft/cometbft/libs/events"`

* [Overview](#pkg-overview)
* [Index](#pkg-index)

## Overview

Pub-Sub in go with event caching

## Index

* [type EventCache](#EventCache)
    * [func NewEventCache(evsw Fireable) *EventCache](#NewEventCache)
    * [func (evc *EventCache) FireEvent(event string, data EventData)](#EventCache.FireEvent)
    * [func (evc *EventCache) Flush()](#EventCache.Flush)
* [type EventCallback](#EventCallback)
* [type EventData](#EventData)
* [type EventSwitch](#EventSwitch)
    * [func NewEventSwitch() EventSwitch](#NewEventSwitch)
* [type Eventable](#Eventable)
* [type Fireable](#Fireable)


### Package files

[event_cache.go](/src/github.com/cometbft/cometbft/libs/events/event_cache.go) [events.go](/src/github.com/cometbft/cometbft/libs/events/events.go) 






## Type [EventCache](/src/target/event_cache.go?s=116:179#L5)

``` go
type EventCache struct {
    // contains filtered or unexported fields
}
```

An EventCache buffers events for a Fireable
All events are cached. Filtering happens on Flush







### func [NewEventCache](/src/target/event_cache.go?s=239:284#L11)

``` go
func NewEventCache(evsw Fireable) *EventCache
```

Create a new EventCache with an EventSwitch as backend





### func (\*EventCache) [FireEvent](/src/target/event_cache.go?s=449:511#L24)

``` go
func (evc *EventCache) FireEvent(event string, data EventData)
```

Cache an event to be fired upon finality.




### func (\*EventCache) [Flush](/src/target/event_cache.go?s=735:765#L31)

``` go
func (evc *EventCache) Flush()
```

Fire events by running evsw.FireEvent on all cached events. Blocks.
Clears cached events




## Type [EventCallback](/src/target/events.go?s=4201:4240#L185)

``` go
type EventCallback func(data EventData)
```









## Type [EventData](/src/target/events.go?s=243:294#L14)

``` go
type EventData interface {
}
```










## Type [EventSwitch](/src/target/events.go?s=560:771#L29)

``` go
type EventSwitch interface {
    service.Service
    Fireable

    AddListenerForEvent(listenerID, event string, cb EventCallback)
    RemoveListenerForEvent(event string, listenerID string)
    RemoveListener(listenerID string)
}
```






### func [NewEventSwitch](/src/target/events.go?s=917:950#L46)

``` go
func NewEventSwitch() EventSwitch
```




## Type [Eventable](/src/target/events.go?s=378:440#L20)

``` go
type Eventable interface {
    SetEventSwitch(evsw EventSwitch)
}
```

reactors and other modules should export
this interface to become eventable










## Type [Fireable](/src/target/events.go?s=490:558#L25)

``` go
type Fireable interface {
    FireEvent(event string, data EventData)
}
```

an event switch or cache implements fireable














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