Golang实现带优先级的channel

channelselectcase<-

select {case <- chan1:    // do somethingcase <- chan2:    // do something}

chan1chan2channeldefalut

selectcasedefaultselectcasedefaultcasecasecasedefalutselect

channelchannelselectchannelselectcasedefaultchanneldefalutselectselectcasedefaultselectcase

channelselectselectchannel

也就是说，当高优先级和低优先级都有数据时，高优先级先被处理，也就是实现了优先级。示例如下：

for {          select {            case data := <- highChan:
        handleHigh(data)            default:              select {                 case data := <- highChan:
            handleHigh(data)                 case data := <- lowChan:
            handleLow(data)
        }
    }
}