# go-eventbus事件总线
地址: [github.com/lockp111/go-eventbus](https://github.com/lockp111/go-eventbus)
参考go-observable, 但是那个代码有问题, 会因为map同时读写出现crash, 我修复之后提交给作者也一直不理我, 于是就自己fork一份自用, 后来觉得反射调用的损耗还是比较大的, 而且使用func如果不注意, 有可能出现两个相同的func, 于是改成interface, Benchmark显示提升非常大
## Usage
```
go get -u github.com/lockp111/go-eventbus
```
### New()
Create a new bus struct reference
```go
bus := eventbus.New()
```
### On(topic string, e ...Event)
Subscribe event
```go
type ready struct{
}
func (e ready) Dispatch(msg interface{}){
fmt.Println("I am ready!")
}
bus.On("ready", &ready{})
```
You can also subscribe multiple events for example:
```go
type run struct{
}
func (e run) Dispatch(msg interface{}){
fmt.Println("I am run!")
}
bus.On("ready", &ready{}, &ready{}).On("run", &run{})
```
### Off(topic string, e ...Event)
Unsubscribe event
```go
e := &ready{}
bus.On("ready", e)
bus.Off("ready", e)
```
You can also unsubscribe multiple events for example:
```go
e1 := &ready{}
e2 := &ready{}
bus.On("ready", e1, e2)
bus.Off("ready", e1, e2)
```
You can unsubscribe all events for example:
```go
bus.On("ready", &ready{}, &ready{})
bus.Off("ready")
```
You can unsubscribe all topics for example:
```go
bus.On("ready", &ready{}, &ready{})
bus.On("run", &run{})
bus.Off(ALL)
```
### Trigger(topic string, msg ...interface{})
Dispatch events
```go
bus.Trigger("ready")
```
You can also dispatch multiple events for example:
```go
bus.Trigger("ready", &struct{"1"}, &struct{"2"})
```
You can also dispatch all events for example:
```go
bus.Trigger(ALL, &struct{"1"})
```
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