mirror of
https://github.com/crazybber/go-pattern-examples.git
synced 2024-11-22 11:56:03 +03:00
112 lines
2.2 KiB
Go
112 lines
2.2 KiB
Go
package messaging
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import (
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"context"
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"fmt"
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"sync"
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"testing"
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"time"
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)
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////////////////////////////////
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//通常意义上是，连接消息队列之后就可以发送消息
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//当订阅著之后才会收到相关Topic消息的推送
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//当前，省略连接队列的步骤和操作代码
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////////////////////////////////
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func TestMessageSubAndPubWithTopic(t *testing.T) {
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var wg sync.WaitGroup
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topicName := "seeking passengers"
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//假设消息队列已经收到数据，加下来由topic处理
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topic := Topic{
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Name: topicName,
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UserQueueSize: 5,
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}
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ctx, cancel := context.WithCancel(context.Background())
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wg.Add(1)
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//user 1
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//用户tom订阅拼车消息,订阅的是车主发布的拼车消息
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if subScriberTom, ok := topic.Subscribe(123, topicName); ok {
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go func() {
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defer wg.Done()
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EXIT:
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for {
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select {
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case <-ctx.Done():
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fmt.Println("tom receive cancel, exit")
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break EXIT
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default:
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msg := Message{}
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err := subScriberTom.Receive(&msg)
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if err == nil {
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fmt.Println("tom receive subscribed msg:", msg)
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}
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}
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time.Sleep(200)
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}
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}()
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}
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wg.Add(1)
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//订阅成功了
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//发送一个消息
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//用户Lily订阅拼车消息,订阅的是车主发布的拼车消息
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if subSCriptionLily, ok := topic.Subscribe(456, topicName); ok {
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go func() {
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defer wg.Done()
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EXIT:
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for {
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select {
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case <-ctx.Done():
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fmt.Println("lily receive cancel, exit")
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break EXIT
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default:
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msg := Message{}
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err := subSCriptionLily.Receive(&msg)
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if err == nil {
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fmt.Println("lily receive subscribed msg:", msg)
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}
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}
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time.Sleep(200)
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}
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}()
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}
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go func() {
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//模拟发送消息
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msg := Message{
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Text: "i am looking for 1 passenger",
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From: Session{User{123, "lily"}, time.Now()},
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}
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topic.Publish(msg)
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msg = Message{
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Text: "i am looking for 2 passenger",
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From: Session{User{123, "lucy"}, time.Now()},
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}
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topic.Publish(msg)
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msg = Message{
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Text: "i am looking for passenger as many as i can",
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From: Session{User{123, "rose"}, time.Now()},
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}
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topic.Publish(msg)
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time.Sleep(time.Second)
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cancel()
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}()
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wg.Wait()
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fmt.Println("all message done,exit it")
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}
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