【Redis】集群NetCore实战

database

介绍NetCore如何使用Redis集群

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

internalstatic 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

 

staticvoid 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

 

staticvoid 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

 

staticvoid 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)

 

staticvoid 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)

 

staticvoid 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)));

}

 

转发请标明出处:https://www.cnblogs.com/WilsonPan/p/12677478.html

示例代码: https://github.com/WilsonPan/Net.Demos/tree/master/Demo.RedisCluster

参考文章

StackExchange.Redis | General purpose redis client

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