c# 使用StackExchange.Redis 发布订阅功能
业务场景
举个例子：业务系统触发短信发送申请，但短信发送模块速度跟不上，需要将来不及处理的消息暂存一下，缓冲压力
发布示例
for (var i = 1; i < 20; i++) {
Redis.Using(rd => { rd.Use(1).RedisPub<string>("redis_20190605_pay", "pay amt=" + i); });
Thread.Sleep(200);
}
订阅示例
private static Redis redis;
static void Main(string[] args) {
redis = new Redis();
redis.RedisSubMessageEvent += RedisSubMessageEvent;
redis.Use(1).RedisSub("redis_20190605_pay");
Console.ReadKey();
}
private static void RedisSubMessageEvent(string msg) {
Console.Write($"{DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:fff")} RedisSubMessageEvent: {msg}");
}
效果图
StackExchange.Redis封装的类
using System;
using System.Collections.Generic;
using System.Linq;
using StackExchange.Redis;
namespace Utils.Framework {
public class Redis : IDisposable {
private static ConnectionMultiplexer redis = null;
private static bool connected = false;
private IDatabase db = null;
private int current = 0;
public static bool IsConnected { get { Open(); return redis.IsConnected; } }
public static bool Test() {
bool r = true;
try {
Redis.Using(rs => { rs.Use(0); });
} catch (Exception e) {
Log.Logs("[Redis] test fail " + e.Message);
r = false;
}
if (r) Log.Logs("[Redis] test ok.");
return r;
}
private static int Open() {
if (connected) return 1;
redis = ConnectionMultiplexer.Connect("localhost:6379,password=123456,abortConnect = false");
connected = true;
return 1;
}
public static void Using(Action<Redis> a) {
using (var red = new Redis()) {
a(red);
}
}
public Redis Use(int i) {
Open();
current = i;
db = redis.GetDatabase(i);
//Log.Logs($"RedisDB Conntet State: {redis.IsConnected}");
var t = db.Ping();
//Log.Logs($"RedisDB Select {i}, Ping.{t.TotalMilliseconds}ms");
return this;
}
public void Set(string key, string val, TimeSpan? ts = null) {
db.StringSet(key, val, ts);
}
public string Get(string key) {
return db.StringGet(key);
}
public void Remove(string key) {
db.KeyDelete(key, CommandFlags.HighPriority);
}
public bool Exists(string key) {
return db.KeyExists(key);
}
public void Dispose() {
db = null;
}
#region Redis发布订阅
public delegate void RedisDeletegate(string str);
public event RedisDeletegate RedisSubMessageEvent;
/// <summary>
/// 订阅
/// </summary>
/// <param name="subChannel"></param>
public void RedisSub(string subChannel) {
redis.GetSubscriber().Subscribe(subChannel, (channel, message) => {
RedisSubMessageEvent?.Invoke(message); //触发事件
});
}
/// <summary>
/// 发布
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="channel"></param>
/// <param name="msg"></param>
/// <returns></returns>
public long RedisPub<T>(string channel, T msg) {
return redis.GetSubscriber().Publish(channel, msg.Json());
}
/// <summary>
/// 取消订阅
/// </summary>
/// <param name="channel"></param>
public void Unsubscribe(string channel) {
redis.GetSubscriber().Unsubscribe(channel);
}
/// <summary>
/// 取消全部订阅
/// </summary>
public void UnsubscribeAll() {
redis.GetSubscriber().UnsubscribeAll();
}
#endregion
}
}
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版权声明：本文为CSDN博主「Qin066」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/qin066/article/details/90898737