在C#中使用MyRedis实现分布式锁通常涉及到
SET
命令配合选项NX
(唯一性)和PX
(过期时间)。以下是一个简单的示例,展示了如何使用StackExchange.Redis客户端在C#中实现分布式锁和解锁。首先,确保已经安装了StackExchange.Redis库
cs
Install-Package StackExchange.Redis
简单示例代码
cs
using StackExchange.Redis;
using System;
using System.Threading.Tasks;
public class RedisDistributedLock
{
private readonly ConnectionMultiplexer _redisConnection;
private readonly IDatabase _database;
public RedisDistributedLock(string configuration)
{
_redisConnection = ConnectionMultiplexer.Connect(configuration);
_database = _redisConnection.GetDatabase();
}
public async Task<bool> AcquireLock(string lockKey, string value, int expireTime)
{
// 使用SET命令加锁,条件是键不存在,并设置过期时间
return await _database.StringSetAsync(lockKey, value, expireTime, When.NotExists);
}
public async Task<bool> ReleaseLock(string lockKey, string value)
{
// 获取键对应的值,并且比较是否与传入的值相同,相同则删除键以释放锁
var currentValue = await _database.StringGetAsync(lockKey);
if (currentValue.ToString() == value)
{
return await _database.KeyDeleteAsync(lockKey);
}
return false;
}
}
// 使用示例
var lockClient = new RedisDistributedLock("localhost:6379");
string lockKey = "my_lock";
string lockValue = Guid.NewGuid().ToString(); // 生成唯一值
int lockExpireTime = 5000; // 锁的过期时间,单位毫秒
// 尝试获取锁
bool isLockAcquired = await lockClient.AcquireLock(lockKey, lockValue, lockExpireTime);
if (isLockAcquired)
{
try
{
// 业务逻辑
Console.WriteLine("Lock acquired. Exclusive access to the resource.");
}
finally
{
// 释放锁
bool isLockReleased = await lockClient.ReleaseLock(lockKey, lockValue);
if (isLockReleased)
{
Console.WriteLine("Lock released.");
}
else
{
Console.WriteLine("Unable to release the lock.");
}
}
}
else
{
Console.WriteLine("Unable to acquire lock.");
}
完整示例项目下载地址:MyRedis分布式加锁解锁.rar_myredis资源-CSDN文库