Golang 代码并发问题

Question

我有一个用 Golang 编写的函数，如下所示func (participant *SimulationParticipant) StartTransactionsGatewayTicker() {//Gatewaylogging.InfoLogger.Printf("StartTransactionsGatewayTicker:%v", participant.Participant)ticker := time.NewTicker(1 * time.Second)participant.TransactionGatewayTicker = tickergo func() {    for {        select {        case <-ticker.C:            logging.InfoLogger.Printf("Tick at: %v", participant.Participant)            participant.GetTransactions()        }    }}()}我在循环中调用该函数，就像数组中的 2 SimulationParticipant 一样。令人惊讶的是，第一个参与者被第二个参与者取代，并且 GetTransactions 总是被执行到循环中的最后一项？我怎样才能克服这个

Answer 1

对我有用（我发布此代码时没有看到您如何调用 StartTransactionsGatewayTicker，如果不适用，请勿投反对票：P）：

// [Timers](timers) are for when you want to do

// something once in the future - _tickers_ are for when

// you want to do something repeatedly at regular

// intervals. Here's an example of a ticker that ticks

// periodically until we stop it.

package main

import (

    "fmt"

    "time"

)

func main() {

        part1 := SimulationParticipant{}

    part1.id = "part1"

        part2 := SimulationParticipant{}

        part2.id = "part2"

        partSlice := make([]*SimulationParticipant,0)

        partSlice = append(partSlice, &part1, &part2)

        for _ , p := range partSlice {

             p.StartTransactionsGatewayTicker()

        }

    // Tickers can be stopped like timers. Once a ticker

    // is stopped it won't receive any more values on its

    // channel. We'll stop ours after 16000ms.

    time.Sleep(16000 * time.Millisecond)

    part1.ticker.Stop()

    part2.ticker.Stop()

    fmt.Println("Ticker stopped")

}

type SimulationParticipant struct {

     id string

     ticker *time.Ticker

}

func (participant *SimulationParticipant) StartTransactionsGatewayTicker() {

ticker := time.NewTicker(1 * time.Second)

participant.ticker = ticker

go func() {

    for {

        select {

        case t := <-ticker.C:

            fmt.Println("Tick at", t,participant.id)

        }

    }

}()

}

输出 ：

Tick at 2009-11-10 23:00:01 +0000 UTC m=+1.000000001 part2

Tick at 2009-11-10 23:00:01 +0000 UTC m=+1.000000001 part1

Tick at 2009-11-10 23:00:02 +0000 UTC m=+2.000000001 part1

Tick at 2009-11-10 23:00:02 +0000 UTC m=+2.000000001 part2

Tick at 2009-11-10 23:00:03 +0000 UTC m=+3.000000001 part2

Tick at 2009-11-10 23:00:03 +0000 UTC m=+3.000000001 part1

Tick at 2009-11-10 23:00:04 +0000 UTC m=+4.000000001 part1

Tick at 2009-11-10 23:00:04 +0000 UTC m=+4.000000001 part2

Tick at 2009-11-10 23:00:05 +0000 UTC m=+5.000000001 part2

Tick at 2009-11-10 23:00:05 +0000 UTC m=+5.000000001 part1

Tick at 2009-11-10 23:00:06 +0000 UTC m=+6.000000001 part1

Tick at 2009-11-10 23:00:06 +0000 UTC m=+6.000000001 part2

Tick at 2009-11-10 23:00:07 +0000 UTC m=+7.000000001 part2

Tick at 2009-11-10 23:00:07 +0000 UTC m=+7.000000001 part1

Tick at 2009-11-10 23:00:08 +0000 UTC m=+8.000000001 part1

Tick at 2009-11-10 23:00:08 +0000 UTC m=+8.000000001 part2

Tick at 2009-11-10 23:00:09 +0000 UTC m=+9.000000001 part2

Tick at 2009-11-10 23:00:09 +0000 UTC m=+9.000000001 part1

Tick at 2009-11-10 23:00:10 +0000 UTC m=+10.000000001 part1

Tick at 2009-11-10 23:00:10 +0000 UTC m=+10.000000001 part2

Tick at 2009-11-10 23:00:11 +0000 UTC m=+11.000000001 part2

Tick at 2009-11-10 23:00:11 +0000 UTC m=+11.000000001 part1

Tick at 2009-11-10 23:00:12 +0000 UTC m=+12.000000001 part1

Tick at 2009-11-10 23:00:12 +0000 UTC m=+12.000000001 part2

Tick at 2009-11-10 23:00:13 +0000 UTC m=+13.000000001 part2

Tick at 2009-11-10 23:00:13 +0000 UTC m=+13.000000001 part1

Tick at 2009-11-10 23:00:14 +0000 UTC m=+14.000000001 part1

Tick at 2009-11-10 23:00:14 +0000 UTC m=+14.000000001 part2

Tick at 2009-11-10 23:00:15 +0000 UTC m=+15.000000001 part2

Tick at 2009-11-10 23:00:15 +0000 UTC m=+15.000000001 part1

Ticker stopped

游乐场： https: //play.golang.org/p/yfHnrRK1iG8