gitlab.com/gpdionisio/tendermint@v0.34.19-dev2/libs/events/README.md (about)

     1  
     2  
     3  # events
     4  
     5  `import "github.com/tendermint/tendermint/libs/events"`
     6  
     7  * [Overview](#pkg-overview)
     8  * [Index](#pkg-index)
     9  
    10  ## Overview
    11  
    12  Pub-Sub in go with event caching
    13  
    14  ## Index
    15  
    16  * [type EventCache](#EventCache)
    17      * [func NewEventCache(evsw Fireable) *EventCache](#NewEventCache)
    18      * [func (evc *EventCache) FireEvent(event string, data EventData)](#EventCache.FireEvent)
    19      * [func (evc *EventCache) Flush()](#EventCache.Flush)
    20  * [type EventCallback](#EventCallback)
    21  * [type EventData](#EventData)
    22  * [type EventSwitch](#EventSwitch)
    23      * [func NewEventSwitch() EventSwitch](#NewEventSwitch)
    24  * [type Eventable](#Eventable)
    25  * [type Fireable](#Fireable)
    26  
    27  
    28  ### Package files
    29  
    30  [event_cache.go](/src/github.com/tendermint/tendermint/libs/events/event_cache.go) [events.go](/src/github.com/tendermint/tendermint/libs/events/events.go) 
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    36  
    37  ## Type [EventCache](/src/target/event_cache.go?s=116:179#L5)
    38  
    39  ``` go
    40  type EventCache struct {
    41      // contains filtered or unexported fields
    42  }
    43  ```
    44  
    45  An EventCache buffers events for a Fireable
    46  All events are cached. Filtering happens on Flush
    47  
    48  
    49  
    50  
    51  
    52  
    53  
    54  ### func [NewEventCache](/src/target/event_cache.go?s=239:284#L11)
    55  
    56  ``` go
    57  func NewEventCache(evsw Fireable) *EventCache
    58  ```
    59  
    60  Create a new EventCache with an EventSwitch as backend
    61  
    62  
    63  
    64  
    65  
    66  ### func (\*EventCache) [FireEvent](/src/target/event_cache.go?s=449:511#L24)
    67  
    68  ``` go
    69  func (evc *EventCache) FireEvent(event string, data EventData)
    70  ```
    71  
    72  Cache an event to be fired upon finality.
    73  
    74  
    75  
    76  
    77  ### func (\*EventCache) [Flush](/src/target/event_cache.go?s=735:765#L31)
    78  
    79  ``` go
    80  func (evc *EventCache) Flush()
    81  ```
    82  
    83  Fire events by running evsw.FireEvent on all cached events. Blocks.
    84  Clears cached events
    85  
    86  
    87  
    88  
    89  ## Type [EventCallback](/src/target/events.go?s=4201:4240#L185)
    90  
    91  ``` go
    92  type EventCallback func(data EventData)
    93  ```
    94  
    95  
    96  
    97  
    98  
    99  
   100  
   101  
   102  
   103  ## Type [EventData](/src/target/events.go?s=243:294#L14)
   104  
   105  ``` go
   106  type EventData interface {
   107  }
   108  ```
   109  
   110  Generic event data can be typed and registered with tendermint/go-amino
   111  via concrete implementation of this interface
   112  
   113  
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   120  
   121  
   122  ## Type [EventSwitch](/src/target/events.go?s=560:771#L29)
   123  
   124  ``` go
   125  type EventSwitch interface {
   126      service.Service
   127      Fireable
   128  
   129      AddListenerForEvent(listenerID, event string, cb EventCallback)
   130      RemoveListenerForEvent(event string, listenerID string)
   131      RemoveListener(listenerID string)
   132  }
   133  ```
   134  
   135  
   136  
   137  
   138  
   139  
   140  ### func [NewEventSwitch](/src/target/events.go?s=917:950#L46)
   141  
   142  ``` go
   143  func NewEventSwitch() EventSwitch
   144  ```
   145  
   146  
   147  
   148  
   149  ## Type [Eventable](/src/target/events.go?s=378:440#L20)
   150  
   151  ``` go
   152  type Eventable interface {
   153      SetEventSwitch(evsw EventSwitch)
   154  }
   155  ```
   156  
   157  reactors and other modules should export
   158  this interface to become eventable
   159  
   160  
   161  
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   167  
   168  
   169  ## Type [Fireable](/src/target/events.go?s=490:558#L25)
   170  
   171  ``` go
   172  type Fireable interface {
   173      FireEvent(event string, data EventData)
   174  }
   175  ```
   176  
   177  an event switch or cache implements fireable
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   192  - - -
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