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  • 【Redis】集群NetCore实战

    环境准备

    1. Redis集群(Windows集群搭建

    启动Redis集群,给每个节点加上Title

    start "Redis - 6379" /min redis-server.exe redis.6379.conf
    start "Redis - 6380" /min redis-server.exe redis.6380.conf
    start "Redis - 6381" /min redis-server.exe redis.6381.conf
    start "Redis - 6382" /min redis-server.exe redis.6382.conf
    start "Redis - 6383" /min redis-server.exe redis.6383.conf
    start "Redis - 6384" /min redis-server.exe redis.6384.conf

    2. 安装StackExchange.Redis包

    dotnet add package StackExchange.Redis

    连接Redis

    var configString = "127.0.0.1:6379";
    var options = ConfigurationOptions.Parse(configString);
    options.ReconnectRetryPolicy = new ExponentialRetry(5000);
    var client = ConnectionMultiplexer.Connect(options);

    这里只需要提供一个节点就能访问整个集群

    ConnectionMultiplexer 连接Redis可以使用ConfigurationOptions,或者直接字符串初始化(里面实现也是调用ConfigurationOptions.Parse转换)

    这里要说一下是他的重连重试机制,在第一次创建连接的时候,StackExchange.Redis会创建一个心跳检测

    internal static IDisposable Create(ConnectionMultiplexer connection)
    {
        var token = new TimerToken(connection);
        var timer = new Timer(Heartbeat, token, MillisecondsPerHeartbeat, MillisecondsPerHeartbeat);
        token.SetTimer(timer);
        return timer;
    }

    使用System.Threading.Timer每秒钟检查一次。

    StackExchange.Redis 实现两种重试策略,当然我们也可以实现自己的重现策略,实现IReconnectRetryPolicy接口

    •  ExponentialRetry(指数)

       根据指定时间,根据重试次数不断增大随机数范围

    • LinearRetry(线性)

       根据指定时间固定时间间隔重试

    常用数据结构操作

    字符串(String)操作

    static void RedisStringOperation(ConnectionMultiplexer client)
    {
        var db = client.GetDatabase();
    
        //单个Key操作
        db.StringSet("Key", "Wilson");
        Console.WriteLine($"Get Key : {db.StringGet("Key")}");
    
        db.StringSet("Nums", 1);
        db.StringIncrement("Nums");
        Console.WriteLine($"Get Nums : {db.StringGet("Nums")}");
    
        db.StringDecrement("Nums");
        Console.WriteLine($"Get Nums : {db.StringGet("Nums")}");
    
        //多个Key操作
        db.StringSet(new KeyValuePair<RedisKey, RedisValue>[]
        {
            new KeyValuePair<RedisKey, RedisValue>("{user}Name","Wilson"),
            new KeyValuePair<RedisKey, RedisValue>("{user}Age",30)
        });
    
        foreach (var value in db.StringGet(new RedisKey[] { "{user}Name", "{user}Age" }))
        {
            Console.WriteLine($"{value}");
        }
    }

    哈希(Hash)操作

    static void RedisHashOperation(ConnectionMultiplexer client)
    {
        var db = client.GetDatabase();
    
        db.HashSet("person", "name", "Wilson");
        Console.WriteLine(db.HashGet("person", "name"));
    
        db.HashSet("person", new HashEntry[]
        {
            new HashEntry("name","Wilson"),
            new HashEntry("sex",1)
        });
        Console.WriteLine(string.Join("
    ", db.HashGet("person", new RedisValue[] { "name", "sex" })));
    
        Console.WriteLine(string.Join("
    ", db.HashGetAll("person")));
    }

    列表(List) 操作

    static void RedisListOperation(ConnectionMultiplexer client)
    {
        var db = client.GetDatabase();
    
        db.ListLeftPush("list", 100);
        db.ListLeftPush("list", 200);
        db.ListLeftPush("list", 300);
        db.ListRightPush("list", 400);
        db.ListRightPush("list", 500);
    
        Console.WriteLine(db.ListLeftPop("list"));
        Console.WriteLine(db.ListRightPop("list"));
        Console.WriteLine(string.Join("	", db.ListRange("list", 0, 2)));
        Console.WriteLine(db.ListLength("list"));
    }

    集合(Set)

    static void RedisSetOperation(ConnectionMultiplexer client)
    {
        var db = client.GetDatabase();
    
        db.SetAdd("user", "Wilson");
        db.SetAdd("user", "Wilson");
        db.SetAdd("user", "Alice");
    
        Console.WriteLine(db.SetLength("user"));
        Console.WriteLine(db.SetPop("user"));
        Console.WriteLine(string.Join("
    ", db.SetMembers("user")));
    }

    有序集合(Sorted Set)

    static void RedisSortedSetOperation(ConnectionMultiplexer client)
    {
        var db = client.GetDatabase();
    
        db.KeyDelete("user");
    
        db.SortedSetAdd("user", "Wilson", 90);
        db.SortedSetAdd("user", "Alice", 85);
        db.SortedSetAdd("user", "Trenary", 12);
        db.SortedSetAdd("user", "Nixon", 30);
    
        Console.WriteLine(db.SortedSetLength("user"));
        Console.WriteLine(db.SortedSetRemove("user", "Wilson"));
        Console.WriteLine(string.Join("
    ", db.SortedSetRangeByRank("user", 0, 2)));
    }

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  • 原文地址:https://www.cnblogs.com/WilsonPan/p/12677478.html
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