发布:2022/8/6 16:49:13作者:管理员 来源:本站 浏览次数:1536
安装依赖
StackExchange.Redis
1
appsettings.json
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft.AspNetCore": "Warning"
}
},
"AllowedHosts": "*",
"Redis": {
"Password": "",
"AllowAdmin": false,
"Ssl": false,
"ConnectTimeout": 6000,
"ConnectRetry": 2,
"Hosts": [
{
"Host": "localhost",
"Port": "6379"
}
],
"Database": 0
},
"RedisConnectionString": {"Value":"127.0.0.1,DefaultDatabase=0" }
}
RedisConfig.cs
namespace CoreRedis.Config
{
public class RedisConfig
{
public string Value { get; set; }
}
}
builder.Services.Configure<RedisConfig>(
builder.Configuration.GetSection("RedisConnectionString")
);
//如下,是个单例的服务,这个服务中需要注入配置项
builder.Services.AddSingleton<RedisString>();
如何在单例中注入
关键是使用 IOptionsMonitor
https://andrewlock.net/creating-singleton-named-options-with-ioptionsmonitor/
using Microsoft.AspNetCore.Mvc;
using StackExchange.Redis;
using StackExchange.Redis.Extensions.Core.Abstractions;
using System.Threading;
using System.Threading.Tasks;
using System.Configuration;
using Microsoft.Extensions.Options;
using CoreRedis.Config;
using Newtonsoft.Json;
namespace CoreRedis.RedisDataType
{
public class RedisString
{
private static readonly object _lock = new object();
private ConnectionMultiplexer redisMultiplexer;
//private static RedisString _redisClient = null;
private readonly RedisConfig _redisConfig;
IDatabase db = null;
//public static RedisString RedisClient
//{
// get
// {
// if (_redisClient == null)
// {
// lock(_lock)
// {
// _redisClient = new RedisString();
// }
// }
// return _redisClient;
// }
//}
public RedisString(IOptionsMonitor<RedisConfig> optionsSnapshot)
{
_redisConfig = optionsSnapshot.CurrentValue;
//_redisConfig = optionsSnapshot;
var RedisConnection = _redisConfig.Value;
redisMultiplexer = ConnectionMultiplexer.Connect(RedisConnection);
db = redisMultiplexer.GetDatabase();
}
//添加一个key 或者覆盖key的值
public async Task<Task<bool>> SetKey(string key, string value)
{
return db.StringSetAsync(key, value, null, false, StackExchange.Redis.When.Always);
}
//只有在键不存在的时候才设置
public async Task<Task<bool>> SetKeyNx(string key, string value)
{
return db.StringSetAsync(key, value, null, false, When.NotExists);
}
/// <summary>
/// 获取一个key的对象
/// </summary>
public async Task<T> GetStringKey<T>(string key)
{
if (db == null)
{
return default;
}
var value = await db.StringGetAsync(key);
if (value.IsNullOrEmpty)
{
return default;
}
return JsonConvert.DeserializeObject<T>(value);
}
//getset一个key,获取旧值并设置新值
public async Task<T> GetSetKey<T>(string key,string value)
{
var oldvalue = await db.StringGetSetAsync(key, value);
return JsonConvert.DeserializeObject<T>(oldvalue);
}
//mset 一次设置多个数据
public async Task<Task<bool>> MSET(KeyValuePair<RedisKey, RedisValue>[] values )
{
return db.StringSetAsync(values, When.NotExists);
}
//mget 一次获取多个数据
public async Task<Task<RedisValue[]>> MGET(RedisKey[] keys)
{
return db.StringGetAsync(keys);
}
//获取string的length
public async Task<Task<long>> KeyLen(string key)
{
return db.StringLengthAsync(key);
}
//append
public async Task<Task<long>> Append(string key , string appendvalue)
{
return db.StringAppendAsync(key, appendvalue);
}
//get range
public async Task<Task<RedisValue>> GetRange(string key , int start, int end)
{
return db.StringGetRangeAsync(key, start, end);
}
//增加
public async Task<Task<long>> Incr(string key,int count)
{
return db.StringIncrementAsync(key, count);
}
//减少
public async Task<Task<long>> Decr(string key,int count)
{
return db.StringDecrementAsync(key, count);
}
}
}
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