redis nsq finished

.idea/dataSources.xml

@@ -8,5 +8,12 @@
       <jdbc-url>jdbc:mysql://43.143.245.135:3306/wangaodev</jdbc-url>
       <working-dir>$ProjectFileDir$</working-dir>
     </data-source>
+    <data-source source="LOCAL" name="redis" uuid="665032e7-b8f2-4753-b906-e96b22bc54f9">
+      <driver-ref>redis</driver-ref>
+      <synchronize>true</synchronize>
+      <jdbc-driver>jdbc.RedisDriver</jdbc-driver>
+      <jdbc-url>jdbc:redis://43.143.245.135:6379/0</jdbc-url>
+      <working-dir>$ProjectFileDir$</working-dir>
+    </data-source>
   </component>
 </project>

go.mod

@@ -4,6 +4,9 @@ go 1.22
 
 require (
 	filippo.io/edwards25519 v1.1.0 // indirect
+	github.com/go-redis/redis v6.15.9+incompatible // indirect
 	github.com/go-sql-driver/mysql v1.8.1 // indirect
+	github.com/golang/snappy v0.0.4 // indirect
 	github.com/jmoiron/sqlx v1.4.0 // indirect
+	github.com/nsqio/go-nsq v1.1.0 // indirect
 )

go.sum

@@ -1,8 +1,15 @@
 filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
 filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
+github.com/go-redis/redis v6.15.9+incompatible h1:K0pv1D7EQUjfyoMql+r/jZqCLizCGKFlFgcHWWmHQjg=
+github.com/go-redis/redis v6.15.9+incompatible/go.mod h1:NAIEuMOZ/fxfXJIrKDQDz8wamY7mA7PouImQ2Jvg6kA=
 github.com/go-sql-driver/mysql v1.8.1 h1:LedoTUt/eveggdHS9qUFC1EFSa8bU2+1pZjSRpvNJ1Y=
 github.com/go-sql-driver/mysql v1.8.1/go.mod h1:wEBSXgmK//2ZFJyE+qWnIsVGmvmEKlqwuVSjsCm7DZg=
+github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/golang/snappy v0.0.4 h1:yAGX7huGHXlcLOEtBnF4w7FQwA26wojNCwOYAEhLjQM=
+github.com/golang/snappy v0.0.4/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/jmoiron/sqlx v1.4.0 h1:1PLqN7S1UYp5t4SrVVnt4nUVNemrDAtxlulVe+Qgm3o=
 github.com/jmoiron/sqlx v1.4.0/go.mod h1:ZrZ7UsYB/weZdl2Bxg6jCRO9c3YHl8r3ahlKmRT4JLY=
 github.com/lib/pq v1.10.9/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/mattn/go-sqlite3 v1.14.22/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=
+github.com/nsqio/go-nsq v1.1.0 h1:PQg+xxiUjA7V+TLdXw7nVrJ5Jbl3sN86EhGCQj4+FYE=
+github.com/nsqio/go-nsq v1.1.0/go.mod h1:vKq36oyeVXgsS5Q8YEO7WghqidAVXQlcFxzQbQTuDEY=

nsq/nsq-consumer.go

@@ -0,0 +1,58 @@
+// nsq_consumer/main.go
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"github.com/nsqio/go-nsq"
+)
+
+// NSQ Consumer Demo
+
+// MyHandler 是一个消费者类型
+type MyHandler struct {
+	Title string
+}
+
+// HandleMessage 是需要实现的处理消息的方法
+func (m *MyHandler) HandleMessage(msg *nsq.Message) (err error) {
+	fmt.Printf("%s recv from %v, msg:%v\n", m.Title, msg.NSQDAddress, string(msg.Body))
+	return
+}
+
+// 初始化消费者
+func initConsumer(topic string, channel string, address string) (err error) {
+	config := nsq.NewConfig()
+	config.LookupdPollInterval = 15 * time.Second
+	c, err := nsq.NewConsumer(topic, channel, config)
+	if err != nil {
+		fmt.Printf("create consumer failed, err:%v\n", err)
+		return
+	}
+	consumer := &MyHandler{
+		Title: "自由",
+	}
+	c.AddHandler(consumer)
+
+	//if err := c.ConnectToNSQD(address); err != nil { // 直接连NSQD
+	if err := c.ConnectToNSQLookupd(address); err != nil { // 通过lookupd查询
+		return err
+	}
+	return nil
+
+}
+
+func main() {
+	err := initConsumer("topic_demo", "first", "43.143.245.135:4161")
+	if err != nil {
+		fmt.Printf("init consumer failed, err:%v\n", err)
+		return
+	}
+	c := make(chan os.Signal)        // 定义一个信号的通道
+	signal.Notify(c, syscall.SIGINT) // 转发键盘中断信号到c
+	<-c                              // 阻塞
+}

nsq/nsq-producer.go

@@ -0,0 +1,53 @@
+// nsq_producer/main.go
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"github.com/nsqio/go-nsq"
+	"os"
+	"strings"
+)
+
+// NSQ Producer Demo
+
+var producer *nsq.Producer
+
+// 初始化生产者
+func initProducer(str string) (err error) {
+	config := nsq.NewConfig()
+	producer, err = nsq.NewProducer(str, config)
+	if err != nil {
+		fmt.Printf("create producer failed, err:%v\n", err)
+		return err
+	}
+	return nil
+}
+
+func main() {
+	nsqAddress := "43.143.245.135:4150"
+	err := initProducer(nsqAddress)
+	if err != nil {
+		fmt.Printf("init producer failed, err:%v\n", err)
+		return
+	}
+
+	reader := bufio.NewReader(os.Stdin) // 从标准输入读取
+	for {
+		data, err := reader.ReadString('\n')
+		if err != nil {
+			fmt.Printf("read string from stdin failed, err:%v\n", err)
+			continue
+		}
+		data = strings.TrimSpace(data)
+		if strings.ToUpper(data) == "Q" { // 输入Q退出
+			break
+		}
+		// 向 'topic_demo' publish 数据
+		err = producer.Publish("topic_demo", []byte(data))
+		if err != nil {
+			fmt.Printf("publish msg to nsq failed, err:%v\n", err)
+			continue
+		}
+	}
+}

nsq/nsq.log

@@ -0,0 +1,7 @@
+nsq的适用场景
+异步处理
+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。
+应用解耦
+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
+流量削峰
+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。

redis/redis-connect.go

@@ -0,0 +1,57 @@
+package main
+
+import (
+	"fmt"
+	"github.com/go-redis/redis"
+)
+
+// redis
+// 与mysql类似，也是一个连接池对象
+var redisdb *redis.Client
+
+func initRedis() (err error) {
+	//这里不要声明为局部变量
+	redisdb = redis.NewClient(&redis.Options{
+		Addr:     "43.143.245.135:6379",
+		Password: "ningzaichun",
+		DB:       0,
+	})
+	pong, err := redisdb.Ping().Result()
+	if err != nil {
+		return err
+	}
+	fmt.Println("pong", pong)
+	return nil
+
+}
+func main() {
+	err := initRedis()
+	if err != nil {
+		fmt.Println("connect redis failed", err)
+		return
+	}
+	fmt.Println("redis connect success")
+
+	//zset
+	key := "rank"
+	languages := []redis.Z{
+		{Score: 90.0, Member: "Golang"},
+		{Score: 98.0, Member: "Java"},
+		{Score: 95.0, Member: "Python"},
+		{Score: 97.0, Member: "JavaScript"},
+		{Score: 99.0, Member: "C/C++"},
+	}
+	//把元素追加到key
+	num, err := redisdb.ZAdd(key, languages...).Result()
+	if err != nil {
+		fmt.Println("add languages failed", err)
+	}
+	fmt.Println("add languages success", num)
+	//给Golang加10分
+	newScore, err := redisdb.ZIncrBy(key, 10, "Golang").Result()
+	if err != nil {
+		fmt.Printf("zincrby failed, err:%v\n", err)
+		return
+	}
+	fmt.Printf("Golang's score is %f now.\n", newScore)
+}

redis/redis.log

@@ -0,0 +1,7 @@
+redis的用处
+1.cache缓存
+2.简单的队列
+3.排行榜
+推荐书目：
+《redis实战》
+