redis nsq finished
Your Name
parent
551443d830
commit
f8dda033a4
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@ -8,5 +8,12 @@
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<jdbc-url>jdbc:mysql://43.143.245.135:3306/wangaodev</jdbc-url>
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<working-dir>$ProjectFileDir$</working-dir>
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</data-source>
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<data-source source="LOCAL" name="redis" uuid="665032e7-b8f2-4753-b906-e96b22bc54f9">
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<driver-ref>redis</driver-ref>
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<synchronize>true</synchronize>
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<jdbc-driver>jdbc.RedisDriver</jdbc-driver>
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<jdbc-url>jdbc:redis://43.143.245.135:6379/0</jdbc-url>
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<working-dir>$ProjectFileDir$</working-dir>
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</data-source>
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</component>
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</project>
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3
go.mod
3
go.mod
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@ -4,6 +4,9 @@ go 1.22
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require (
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filippo.io/edwards25519 v1.1.0 // indirect
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github.com/go-redis/redis v6.15.9+incompatible // indirect
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github.com/go-sql-driver/mysql v1.8.1 // indirect
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github.com/golang/snappy v0.0.4 // indirect
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github.com/jmoiron/sqlx v1.4.0 // indirect
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github.com/nsqio/go-nsq v1.1.0 // indirect
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)
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7
go.sum
7
go.sum
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@ -1,8 +1,15 @@
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filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
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filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
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github.com/go-redis/redis v6.15.9+incompatible h1:K0pv1D7EQUjfyoMql+r/jZqCLizCGKFlFgcHWWmHQjg=
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github.com/go-redis/redis v6.15.9+incompatible/go.mod h1:NAIEuMOZ/fxfXJIrKDQDz8wamY7mA7PouImQ2Jvg6kA=
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github.com/go-sql-driver/mysql v1.8.1 h1:LedoTUt/eveggdHS9qUFC1EFSa8bU2+1pZjSRpvNJ1Y=
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github.com/go-sql-driver/mysql v1.8.1/go.mod h1:wEBSXgmK//2ZFJyE+qWnIsVGmvmEKlqwuVSjsCm7DZg=
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github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
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github.com/golang/snappy v0.0.4 h1:yAGX7huGHXlcLOEtBnF4w7FQwA26wojNCwOYAEhLjQM=
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github.com/golang/snappy v0.0.4/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
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github.com/jmoiron/sqlx v1.4.0 h1:1PLqN7S1UYp5t4SrVVnt4nUVNemrDAtxlulVe+Qgm3o=
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github.com/jmoiron/sqlx v1.4.0/go.mod h1:ZrZ7UsYB/weZdl2Bxg6jCRO9c3YHl8r3ahlKmRT4JLY=
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github.com/lib/pq v1.10.9/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
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github.com/mattn/go-sqlite3 v1.14.22/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=
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github.com/nsqio/go-nsq v1.1.0 h1:PQg+xxiUjA7V+TLdXw7nVrJ5Jbl3sN86EhGCQj4+FYE=
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github.com/nsqio/go-nsq v1.1.0/go.mod h1:vKq36oyeVXgsS5Q8YEO7WghqidAVXQlcFxzQbQTuDEY=
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@ -0,0 +1,58 @@
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// nsq_consumer/main.go
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package main
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import (
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"fmt"
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"os"
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"os/signal"
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"syscall"
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"time"
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"github.com/nsqio/go-nsq"
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)
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// NSQ Consumer Demo
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// MyHandler 是一个消费者类型
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type MyHandler struct {
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Title string
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}
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// HandleMessage 是需要实现的处理消息的方法
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func (m *MyHandler) HandleMessage(msg *nsq.Message) (err error) {
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fmt.Printf("%s recv from %v, msg:%v\n", m.Title, msg.NSQDAddress, string(msg.Body))
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return
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}
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// 初始化消费者
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func initConsumer(topic string, channel string, address string) (err error) {
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config := nsq.NewConfig()
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config.LookupdPollInterval = 15 * time.Second
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c, err := nsq.NewConsumer(topic, channel, config)
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if err != nil {
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fmt.Printf("create consumer failed, err:%v\n", err)
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return
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}
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consumer := &MyHandler{
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Title: "自由",
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}
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c.AddHandler(consumer)
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//if err := c.ConnectToNSQD(address); err != nil { // 直接连NSQD
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if err := c.ConnectToNSQLookupd(address); err != nil { // 通过lookupd查询
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return err
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}
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return nil
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}
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func main() {
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err := initConsumer("topic_demo", "first", "43.143.245.135:4161")
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if err != nil {
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fmt.Printf("init consumer failed, err:%v\n", err)
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return
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}
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c := make(chan os.Signal) // 定义一个信号的通道
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signal.Notify(c, syscall.SIGINT) // 转发键盘中断信号到c
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<-c // 阻塞
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}
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@ -0,0 +1,53 @@
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// nsq_producer/main.go
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package main
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import (
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"bufio"
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"fmt"
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"github.com/nsqio/go-nsq"
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"os"
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"strings"
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)
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// NSQ Producer Demo
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var producer *nsq.Producer
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// 初始化生产者
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func initProducer(str string) (err error) {
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config := nsq.NewConfig()
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producer, err = nsq.NewProducer(str, config)
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if err != nil {
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fmt.Printf("create producer failed, err:%v\n", err)
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return err
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}
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return nil
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}
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func main() {
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nsqAddress := "43.143.245.135:4150"
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err := initProducer(nsqAddress)
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if err != nil {
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fmt.Printf("init producer failed, err:%v\n", err)
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return
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}
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reader := bufio.NewReader(os.Stdin) // 从标准输入读取
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for {
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data, err := reader.ReadString('\n')
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if err != nil {
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fmt.Printf("read string from stdin failed, err:%v\n", err)
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continue
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}
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data = strings.TrimSpace(data)
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if strings.ToUpper(data) == "Q" { // 输入Q退出
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break
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}
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// 向 'topic_demo' publish 数据
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err = producer.Publish("topic_demo", []byte(data))
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if err != nil {
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fmt.Printf("publish msg to nsq failed, err:%v\n", err)
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continue
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}
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}
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}
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@ -0,0 +1,7 @@
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nsq的适用场景
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异步处理
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参照下图利用消息队列把业务流程中的非关键流程异步化，从而显著降低业务请求的响应时间。
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应用解耦
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通过使用消息队列将不同的业务逻辑解耦，降低系统间的耦合，提高系统的健壮性。后续有其他业务要使用订单数据可直接订阅消息队列，提高系统的灵活性
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流量削峰
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类似秒杀（大秒）等场景下，某一时间可能会产生大量的请求，使用消息队列能够为后端处理请求提供一定的缓冲区，保证后端服务的稳定性。
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@ -0,0 +1,57 @@
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package main
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import (
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"fmt"
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"github.com/go-redis/redis"
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)
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// redis
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// 与mysql类似，也是一个连接池对象
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var redisdb *redis.Client
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func initRedis() (err error) {
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//这里不要声明为局部变量
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redisdb = redis.NewClient(&redis.Options{
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Addr: "43.143.245.135:6379",
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Password: "ningzaichun",
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DB: 0,
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})
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pong, err := redisdb.Ping().Result()
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if err != nil {
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return err
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}
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fmt.Println("pong", pong)
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return nil
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}
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func main() {
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err := initRedis()
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if err != nil {
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fmt.Println("connect redis failed", err)
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return
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}
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fmt.Println("redis connect success")
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//zset
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key := "rank"
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languages := []redis.Z{
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{Score: 90.0, Member: "Golang"},
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{Score: 98.0, Member: "Java"},
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{Score: 95.0, Member: "Python"},
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{Score: 97.0, Member: "JavaScript"},
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{Score: 99.0, Member: "C/C++"},
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}
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//把元素追加到key
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num, err := redisdb.ZAdd(key, languages...).Result()
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if err != nil {
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fmt.Println("add languages failed", err)
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}
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fmt.Println("add languages success", num)
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//给Golang加10分
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newScore, err := redisdb.ZIncrBy(key, 10, "Golang").Result()
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if err != nil {
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fmt.Printf("zincrby failed, err:%v\n", err)
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return
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}
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fmt.Printf("Golang's score is %f now.\n", newScore)
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}
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@ -0,0 +1,7 @@
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redis的用处
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1.cache缓存
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2.简单的队列
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3.排行榜
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推荐书目：
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《redis实战》
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