0,关于RedisRESP
1,定义数据类型
2,定义异步消息状态机
3,定义命令发送模板
4,定义RedisClient
5,实现简单的RESP解析
6,实现命令发送客户端
7,如何使用
8,更多客户端
9,更多测试
10,性能测试
0,关于 Redis RESPRESP 全称 REdis Serialization Protocol ,即 Redis 序列化协议,用于协定客户端使用 socket 连接 Redis 时,数据的传输规则。
官方协议说明:https://redis.io/topics/protocol
那么 RESP 协议在与 Redis 通讯时的 请求-响应 方式如下:
客户端将命令作为 RESP 大容量字符串数组(即 C# 中使用 byte[] 存储字符串命令)发送到 Redis 服务器。
服务器根据命令实现以 RESP 类型进行回复。
RESP 中的类型并不是指 Redis 的基本数据类型,而是指数据的响应格式:
在 RESP 中,某些数据的类型取决于第一个字节:
对于简单字符串,答复的第一个字节为“ +”
对于错误,回复的第一个字节为“-”
对于整数,答复的第一个字节为“:”
对于批量字符串,答复的第一个字节为“ $”
对于数组,回复的第一个字节为“ *
”
对于这些,可能初学者不太了解,下面我们来实际操作一下。
我们打开 Redis Desktop Manager ,然后点击控制台,输入:
set a 12
set b 12
set c 12
MGET abc
以上命令每行按一下回车键。MGET 是 Redis 中一次性取出多个键的值的命令。
输出结果如下:
本地:0>SET a 12
"OK"
本地:0>SET b 12
"OK"
本地:0>SET c 12
"OK"
本地:0>MGET a b c
1) "12"
2) "12"
3) "12"
但是这个管理工具以及去掉了 RESP 中的协议标识符,我们来写一个 demo 代码,还原 RESP 的本质。
using System;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
namespace ConsoleApp
{
class Program
{
static async Task Main(string[] args)
{
IPAddress IP = IPAddress.Parse("127.0.0.1");
IPEndPoint IPEndPoint = new IPEndPoint(IP, 6379);
Socket client = new Socket(IP.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
await client.ConnectAsync(IPEndPoint);
if (!client.Connected)
{
Console.WriteLine("连接 Redis 服务器失败!");
Console.Read();
}
Console.WriteLine("恭喜恭喜,连接 Redis 服务器成功");
// 后台接收消息
new Thread(() =>
{
while (true)
{
byte[] data = new byte[100];
int size = client.Receive(data);
Console.WriteLine();
Console.WriteLine(Encoding.UTF8.GetString(data));
Console.WriteLine();
}
}).Start();
while (true)
{
Console.Write("$> ");
string command = Console.ReadLine();
// 发送的命令必须以 \r\n 结尾
int size = client.Send(Encoding.UTF8.GetBytes(command + "\r\n"));
Thread.Sleep(100);
}
}
}
}
输入以及输出结果:
$> SET a 123456789
+OK
$> SET b 123456789
+OK
$> SET c 123456789
+OK
$> MGET a b c
*3
$9
123456789
$9
123456789
$9
123456789
可见,Redis 响应的消息内容,是以 $、*、+ 等字符开头的,并且使用 \r\n 分隔。
我们写 Redis Client 的方法就是接收 socket 内容,然后从中解析出实际的数据。
每次发送设置命令成功,都会返回 +OK;*3 表示有三个数组;$9 表示接收的数据长度是 9;
大概就是这样了,下面我们来写一个简单的 Redis Client 框架,然后睡觉。
记得使用 netstandard2.1,因为有些 byte[] 、string、ReadOnlySpan<T>
的转换,需要 netstandard2.1 才能更加方便。
根据前面的 demo,我们来定义一个类型,存储那些特殊符号:
/// <summary>
/// RESP Response 类型
/// </summary>
public static class RedisValueType
{
public const byte Errors = (byte)'-';
public const byte SimpleStrings = (byte)'+';
public const byte Integers = (byte)':';
public const byte BulkStrings = (byte)'$';
public const byte Arrays = (byte)'*';
public const byte R = (byte)'\r';
public const byte N = (byte)'\n';
}
2,定义异步消息状态机
创建一个 MessageStrace 类,作用是作为消息响应的异步状态机,并且具有解析数据流的功能。
/// <summary>
/// 自定义消息队列状态机
/// </summary>
public abstract class MessageStrace
{
protected MessageStrace()
{
TaskCompletionSource = new TaskCompletionSource<string>();
Task = TaskCompletionSource.Task;
}
protected readonly TaskCompletionSource<string> TaskCompletionSource;
/// <summary>
/// 标志任务是否完成,并接收 redis 响应的字符串数据流
/// </summary>
public Task<string> Task { get; private set; }
/// <summary>
/// 接收数据流
/// </summary>
/// <param name="stream"></param>
/// <param name="length">实际长度</param>
public abstract void Receive(MemoryStream stream, int length);
/// <summary>
/// 响应已经完成
/// </summary>
/// <param name="data"></param>
protected void SetValue(string data)
{
TaskCompletionSource.SetResult(data);
}
/// <summary>
/// 解析 $ 或 * 符号后的数字,必须传递符后后一位的下标
/// </summary>
/// <param name="data"></param>
/// <param name="index">解析到的位置</param>
/// <returns></returns>
protected int BulkStrings(ReadOnlySpan<byte> data, ref int index)
{
int start = index;
int end = start;
while (true)
{
if (index + 1 >= data.Length)
throw new ArgumentOutOfRangeException("溢出");
// \r\n
if (data[index].CompareTo(RedisValueType.R) == 0 && data[index + 1].CompareTo(RedisValueType.N) == 0)
{
index += 2; // 指向 \n 的下一位
break;
}
end++;
index++;
}
// 截取 $2 *3 符号后面的数字
return Convert.ToInt32(Encoding.UTF8.GetString(data.Slice(start, end - start).ToArray()));
}
}
3,定义命令发送模板
由于 Redis 命令非常多,为了更加好的封装,我们定义一个消息发送模板,规定五种类型分别使用五种类型发送 Client。
定义一个统一的模板类:
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;
namespace CZGL.RedisClient
{
/// <summary>
/// 命令发送模板
/// </summary>
public abstract class CommandClient<T> where T : CommandClient<T>
{
protected RedisClient _client;
protected CommandClient()
{
}
protected CommandClient(RedisClient client)
{
_client = client;
}
/// <summary>
/// 复用
/// </summary>
/// <param name="client"></param>
/// <returns></returns>
internal virtual CommandClient<T> Init(RedisClient client)
{
_client = client;
return this;
}
/// <summary>
/// 请求是否成功
/// </summary>
/// <param name="value">响应的消息</param>
/// <returns></returns>
protected bool IsOk(string value)
{
if (value[0].CompareTo('+') != 0 || value[1].CompareTo('O') != 0 || value[2].CompareTo('K') != 0)
return false;
return true;
}
/// <summary>
/// 发送命令
/// </summary>
/// <param name="command">发送的命令</param>
/// <param name="strace">数据类型客户端</param>
/// <returns></returns>
protected Task SendCommand<TStrace>(string command, out TStrace strace) where TStrace : MessageStrace, new()
{
strace = new TStrace();
return _client.SendAsync(strace, command);
}
}
}
4,定义 Redis Client
RedisClient 类用于发送 Redis 命令,然后将任务放到队列中;接收 Redis 返回的数据内容,并将数据流写入内存中,调出队列,设置异步任务的返回值。
Send 过程可以并发,但是接收消息内容使用单线程。为了保证消息的顺序性,采用队列来记录 Send - Receive 的顺序。
C# 的 Socket 比较操蛋,想搞并发和高性能 Socket 不是那么容易。
以下代码有三个地方注释了,后面继续编写其它代码会用到。
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
namespace CZGL.RedisClient
{
/// <summary>
/// Redis 客户端
/// </summary>
public class RedisClient
{
private readonly IPAddress IP;
private readonly IPEndPoint IPEndPoint;
private readonly Socket client;
//private readonly Lazy<StringClient> stringClient;
//private readonly Lazy<HashClient> hashClient;
//private readonly Lazy<ListClient> listClient;
//private readonly Lazy<SetClient> setClient;
//private readonly Lazy<SortedClient> sortedClient;
// 数据流请求队列
private readonly ConcurrentQueue<MessageStrace> StringTaskQueue = new ConcurrentQueue<MessageStrace>();
public RedisClient(string ip, int port)
{
IP = IPAddress.Parse(ip);
IPEndPoint = new IPEndPoint(IP, port);
//stringClient = new Lazy<StringClient>(() => new StringClient(this));
//hashClient = new Lazy<HashClient>(() => new HashClient(this));
//listClient = new Lazy<ListClient>(() => new ListClient(this));
//setClient = new Lazy<SetClient>(() => new SetClient(this));
//sortedClient = new Lazy<SortedClient>(() => new SortedClient(this));
client = new Socket(IP.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
}
/// <summary>
/// 开始连接 Redis
/// </summary>
public async Task<bool> ConnectAsync()
{
await client.ConnectAsync(IPEndPoint);
new Thread(() => { ReceiveQueue(); })
{
IsBackground = true
}.Start();
return client.Connected;
}
/// <summary>
/// 发送一个命令,将其加入队列
/// </summary>
/// <param name="task"></param>
/// <param name="command"></param>
/// <returns></returns>
internal Task<int> SendAsync(MessageStrace task, string command)
{
var buffer = Encoding.UTF8.GetBytes(command + "\r\n");
var result = client.SendAsync(new ArraySegment<byte>(buffer, 0, buffer.Length), SocketFlags.None);
StringTaskQueue.Enqueue(task);
return result;
}
/*
Microsoft 对缓冲区输入不同大小的数据,测试响应时间。
1024 - real 0m0,102s; user 0m0,018s; sys 0m0,009s
2048 - real 0m0,112s; user 0m0,017s; sys 0m0,009s
8192 - real 0m0,163s; user 0m0,017s; sys 0m0,007s
256 - real 0m0,101s; user 0m0,019s; sys 0m0,008s
16 - real 0m0,144s; user 0m0,016s; sys 0m0,010s
.NET Socket,默认缓冲区的大小为 8192 字节。
Socket.ReceiveBufferSize: An Int32 that contains the size, in bytes, of the receive buffer. The default is 8192.
但响应中有很多只是 "+OK\r\n" 这样的响应,并且 MemoryStream 刚好默认是 256(当然,可以自己设置大小),缓冲区过大,浪费内存;
超过 256 这个大小,MemoryStream 会继续分配新的 256 大小的内存区域,会消耗性能。
BufferSize 设置为 256 ,是比较合适的做法。
*/
private const int BufferSize = 256;
/// <summary>
/// 单线程串行接收数据流,调出任务队列完成任务
/// </summary>
private void ReceiveQueue()
{
while (true)
{
MemoryStream stream = new MemoryStream(BufferSize); // 内存缓存区
byte[] data = new byte[BufferSize]; // 分片,每次接收 N 个字节
int size = client.Receive(data); // 等待接收一个消息
int length = size; // 数据流总长度
while (true)
{
stream.Write(data, 0, size); // 分片接收的数据流写入内存缓冲区
// 数据流接收完毕
if (size < BufferSize) // 存在 Bug ,当数据流的大小或者数据流分片最后一片的字节大小刚刚好为 BufferSize 大小时,无法跳出 Receive
{
break;
}
length += client.Receive(data); // 还没有接收完毕,继续接收
}
stream.Seek(0, SeekOrigin.Begin); // 重置游标位置
// 调出队列
StringTaskQueue.TryDequeue(out var tmpResult);
// 处理队列中的任务
tmpResult.Receive(stream, length);
}
}
/// <summary>
/// 复用
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="client"></param>
/// <returns></returns>
public T GetClient<T>(T client) where T : CommandClient<T>
{
client.Init(this);
return client;
}
///// <summary>
///// 获取字符串请求客户端
///// </summary>
///// <returns></returns>
//public StringClient GetStringClient()
//{
// return stringClient.Value;
//}
//public HashClient GetHashClient()
//{
// return hashClient.Value;
//}
//public ListClient GetListClient()
//{
// return listClient.Value;
//}
//public SetClient GetSetClient()
//{
// return setClient.Value;
//}
//public SortedClient GetSortedClient()
//{
// return sortedClient.Value;
//}
}
}
5,实现简单的 RESP 解析
下面使用代码来实现对 Redis RESP 消息的解析,时间问题,我只实现 +、-、$、* 四个符号的解析,其它符号可以自行参考完善。
创建一个 MessageStraceAnalysis`.cs ,其代码如下:
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
namespace CZGL.RedisClient
{
/// <summary>
/// RESP 解析数据流
/// </summary>
public class MessageStraceAnalysis<T> : MessageStrace
{
public MessageStraceAnalysis()
{
}
/// <summary>
/// 解析协议
/// </summary>
/// <param name="data"></param>
public override void Receive(MemoryStream stream, int length)
{
byte firstChar = (byte)stream.ReadByte(); // 首位字符,由于游标已经到 1,所以后面 .GetBuffer(),都是从1开始截断,首位字符舍弃;
if (firstChar.CompareTo(RedisValueType.SimpleStrings) == 0) // 简单字符串
{
SetValue(Encoding.UTF8.GetString(stream.GetBuffer()));
return;
}
else if (firstChar.CompareTo(RedisValueType.Errors) == 0)
{
TaskCompletionSource.SetException(new InvalidOperationException(Encoding.UTF8.GetString(stream.GetBuffer())));
return;
}
// 不是 + 和 - 开头
stream.Position = 0;
int index = 0;
ReadOnlySpan<byte> data = new ReadOnlySpan<byte>(stream.GetBuffer());
string tmp = Analysis(data, ref index);
SetValue(tmp);
}
// 进入递归处理流程
private string Analysis(ReadOnlySpan<byte> data, ref int index)
{
// *
if (data[index].CompareTo(RedisValueType.Arrays) == 0)
{
string value = default;
index++;
int size = BulkStrings(data, ref index);
if (size == 0)
return string.Empty;
else if (size == -1)
return null;
for (int i = 0; i < size; i++)
{
var tmp = Analysis(data, ref index);
value += tmp + ((i < (size - 1)) ? "\r\n" : string.Empty);
}
return value;
}
// $..
else if (data[index].CompareTo(RedisValueType.BulkStrings) == 0)
{
index++;
int size = BulkStrings(data, ref index);
if (size == 0)
return string.Empty;
else if (size == -1)
return null;
var value = Encoding.UTF8.GetString(data.Slice(index, size).ToArray());
index += size + 2; // 脱离之前,将指针移动到 \n 后
return value;
}
throw new ArgumentException("解析错误");
}
}
}
6,实现命令发送客户端
由于 Redis 命令太多,如果直接将所有命令封装到 RedisClient 中,必定使得 API 过的,而且代码难以维护。因此,我们可以拆分,根据 string、hash、set 等 redis 类型,来设计客户端。
下面来设计一个 StringClient:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace CZGL.RedisClient
{
/// <summary>
/// 字符串类型
/// </summary>
public class StringClient : CommandClient<StringClient>
{
internal StringClient()
{
}
internal StringClient(RedisClient client) : base(client)
{
}
/// <summary>
/// 设置键值
/// </summary>
/// <param name="key">key</param>
/// <param name="value">value</param>
/// <returns></returns>
public async Task<bool> Set(string key, string value)
{
await SendCommand<MessageStraceAnalysis<string>>($"{StringCommand.SET} {key} {value}", out MessageStraceAnalysis<string> strace);
var result = await strace.Task;
return IsOk(result);
}
/// <summary>
/// 获取一个键的值
/// </summary>
/// <param name="key">键</param>
/// <returns></returns>
public async Task<string> Get(string key)
{
await SendCommand($"{StringCommand.GET} {key}", out MessageStraceAnalysis<string> strace);
var result = await strace.Task;
return result;
}
/// <summary>
/// 从指定键的值中截取指定长度的数据
/// </summary>
/// <param name="key">key</param>
/// <param name="start">开始下标</param>
/// <param name="end">结束下标</param>
/// <returns></returns>
public async Task<string> GetRance(string key, uint start, int end)
{
await SendCommand($"{StringCommand.GETRANGE} {key} {start} {end}", out MessageStraceAnalysis<string> strace);
var result = await strace.Task;
return result;
}
/// <summary>
/// 设置一个值并返回旧的值
/// </summary>
/// <param name="key"></param>
/// <param name="newValue"></param>
/// <returns></returns>
public async Task<string> GetSet(string key, string newValue)
{
await SendCommand($"{StringCommand.GETSET} {key} {newValue}", out MessageStraceAnalysis<string> strace);
var result = await strace.Task;
return result;
}
/// <summary>
/// 获取二进制数据中某一位的值
/// </summary>
/// <param name="key"></param>
/// <param name="index"></param>
/// <returns>0 或 1</returns>
public async Task<int> GetBit(string key, uint index)
{
await SendCommand($"{StringCommand.GETBIT} {key} {index}", out MessageStraceAnalysis<string> strace);
var result = await strace.Task;
return Convert.ToInt32(result);
}
/// <summary>
/// 设置某一位为 1 或 0
/// </summary>
/// <param name="key"></param>
/// <param name="index"></param>
/// <param name="value">0或1</param>
/// <returns></returns>
public async Task<bool> SetBit(string key, uint index, uint value)
{
await SendCommand($"{StringCommand.SETBIT} {key} {index} {value}", out MessageStraceAnalysis<string> strace);
var result = await strace.Task;
return IsOk(result);
}
/// <summary>
/// 获取多个键的值
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public async Task<string[]> MGet(params string[] key)
{
await SendCommand($"{StringCommand.MGET} {string.Join(" ", key)}", out MessageStraceAnalysis<string> strace);
var result = await strace.Task;
return result.Split("\r\n");
}
private static class StringCommand
{
public const string SET = "SET";
public const string GET = "GET";
public const string GETRANGE = "GETRANGE";
public const string GETSET = "GETSET";
public const string GETBIT = "GETBIT";
public const string SETBIT = "SETBIT";
public const string MGET = "MGET";
// ... ... 更多 字符串的命令
}
}
}
StringClient 实现了 7个 Redis String 类型的命令,其它命令触类旁通。
我们打开 RedisClient.cs,解除以下部分代码的注释:
private readonly Lazy<StringClient> stringClient;// 24 行
stringClient = new Lazy<StringClient>(() => new StringClient(this)); // 38 行
// 146 行
/// <summary>
/// 获取字符串请求客户端
/// </summary>
/// <returns></returns>
public StringClient GetStringClient()
{
return stringClient.Value;
}
7,如何使用
RedisClient 使用示例:
static async Task Main(string[] args)
{
RedisClient client = new RedisClient("127.0.0.1", 6379);
var a = await client.ConnectAsync();
if (!a)
{
Console.WriteLine("连接服务器失败");
Console.ReadKey();
return;
}
Console.WriteLine("连接服务器成功");
var stringClient = client.GetStringClient();
var result = await stringClient.Set("a", "123456789");
Console.Read();
}
封装的消息命令支持异步。
8,更多客户端光 String 类型不过瘾,我们继续封装更多的客户端。
哈希:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace CZGL.RedisClient
{
public class HashClient : CommandClient<HashClient>
{
internal HashClient(RedisClient client) : base(client)
{
}
/// <summary>
/// 设置哈希
/// </summary>
/// <param name="key">键</param>
/// <param name="values">字段-值列表</param>
/// <returns></returns>
public async Task<bool> HmSet(string key, Dictionary<string, string> values)
{
await SendCommand($"{StringCommand.HMSET} {key} {string.Join(" ", values.Select(x => $"{x.Key} {x.Value}").ToArray())})", out MessageStraceAnalysis<string> strace);
var result = await strace.Task;
return IsOk(result);
}
public async Task<bool> HmSet<T>(string key, T values)
{
Dictionary<string, string> dic = new Dictionary<string, string>();
foreach (var item in typeof(T).GetProperties())
{
dic.Add(item.Name, (string)item.GetValue(values));
}
await SendCommand($"{StringCommand.HMSET} {key} {string.Join(" ", dic.Select(x => $"{x.Key} {x.Value}").ToArray())})", out MessageStraceAnalysis<string> strace);
var result = await strace.Task;
return IsOk(result);
}
public async Task<object> HmGet(string key, string field)
{
await SendCommand($"{StringCommand.HMGET} {key} {field}", out MessageStraceAnalysis<string> strace);
var result = await strace.Task;
return IsOk(result);
}
private static class StringCommand
{
public const string HMSET = "HMSET ";
public const string HMGET = "HMGET";
// ... ... 更多 字符串的命令
}
}
}
列表:
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;
namespace CZGL.RedisClient
{
public class ListClient : CommandClient<ListClient>
{
internal ListClient(RedisClient client) : base(client)
{
}
/// <summary>
/// 设置键值
/// </summary>
/// <param name="key">key</param>
/// <param name="value">value</param>
/// <returns></returns>
public async Task<bool> LPush(string key, string value)
{
await SendCommand($"{StringCommand.LPUSH} {key} {value}", out MessageStraceAnalysis<string> strace);
var result = await strace.Task;
return IsOk(result);
}
public async Task<string> LRange(string key, int start, int end)
{
await SendCommand($"{StringCommand.LRANGE} {key} {start} {end}", out MessageStraceAnalysis<string> strace);
var result = await strace.Task;
return result;
}
private static class StringCommand
{
public const string LPUSH = "LPUSH";
public const string LRANGE = "LRANGE";
// ... ... 更多 字符串的命令
}
}
}
集合:
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;
namespace CZGL.RedisClient
{
public class SetClient : CommandClient<SetClient>
{
internal SetClient() { }
internal SetClient(RedisClient client) : base(client)
{
}
public async Task<bool> SAdd(string key, string value)
{
await SendCommand($"{StringCommand.SADD} {key} {value}", out MessageStraceAnalysis<string> strace);
var result = await strace.Task;
return IsOk(result);
}
public async Task<string> SMembers(string key)
{
await SendCommand($"{StringCommand.SMEMBERS} {key}", out MessageStraceAnalysis<string> strace);
var result = await strace.Task;
return result;
}
private static class StringCommand
{
public const string SADD = "SADD";
public const string SMEMBERS = "SMEMBERS";
// ... ... 更多 字符串的命令
}
}
}
有序集合:
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;
namespace CZGL.RedisClient
{
public class SortedClient : CommandClient<SortedClient>
{
internal SortedClient(RedisClient client) : base(client)
{
}
public async Task<bool> ZAdd(string key, string value)
{
await SendCommand($"{StringCommand.ZADD} {key} {value}", out MessageStraceAnalysis<string> strace);
var result = await strace.Task;
return IsOk(result);
}
private static class StringCommand
{
public const string ZADD = "ZADD";
public const string SMEMBERS = "SMEMBERS";
// ... ... 更多 字符串的命令
}
}
}
这样,我们就有一个具有简单功能的 RedisClient 框架了。
9,更多测试为了验证功能是否可用,我们写一些示例:
static RedisClient client = new RedisClient("127.0.0.1", 6379);
static async Task Main(string[] args)
{
var a = await client.ConnectAsync();
if (!a)
{
Console.WriteLine("连接服务器失败");
Console.ReadKey();
return;
}
Console.WriteLine("连接服务器成功");
await StringSETGET();
await StringGETRANGE();
await StringGETSET();
await StringMGet();
Console.ReadKey();
}
static async Task StringSETGET()
{
var stringClient = client.GetStringClient();
var b = await stringClient.Set("seta", "6666");
var c = await stringClient.Get("seta");
if (c == "6666")
{
Console.WriteLine("true");
}
}
static async Task StringGETRANGE()
{
var stringClient = client.GetStringClient();
var b = await stringClient.Set("getrance", "123456789");
var c = await stringClient.GetRance("getrance", 0, -1);
if (c == "123456789")
{
Console.WriteLine("true");
}
var d = await stringClient.GetRance("getrance", 0, 3);
if (d == "1234")
{
Console.WriteLine("true");
}
}
static async Task StringGETSET()
{
var stringClient = client.GetStringClient();
var b = await stringClient.Set("getrance", "123456789");
var c = await stringClient.GetSet("getrance", "987654321");
if (c == "123456789")
{
Console.WriteLine("true");
}
}
static async Task StringMGet()
{
var stringClient = client.GetStringClient();
var a = await stringClient.Set("stra", "123456789");
var b = await stringClient.Set("strb", "123456789");
var c = await stringClient.Set("strc", "123456789");
var d = await stringClient.MGet("stra", "strb", "strc");
if (d.Where(x => x == "123456789").Count() == 3)
{
Console.WriteLine("true");
}
}
10,性能测试
因为只是写得比较简单,而且是单线程,并且内存比较浪费,我觉得性能会比较差。但真相如何呢?我们来测试一下:
static RedisClient client = new RedisClient("127.0.0.1", 6379);
static async Task Main(string[] args)
{
var a = await client.ConnectAsync();
if (!a)
{
Console.WriteLine("连接服务器失败");
Console.ReadKey();
return;
}
Console.WriteLine("连接服务器成功");
var stringClient = client.GetStringClient();
Stopwatch watch = new Stopwatch();
watch.Start();
for (int i = 0; i < 3000; i++)
{
var guid = Guid.NewGuid().ToString();
_ = await stringClient.Set(guid, guid);
_ = await stringClient.Get(guid);
}
watch.Stop();
Console.WriteLine($"总共耗时:{watch.ElapsedMilliseconds} ms");
Console.ReadKey();
}
耗时:
总共耗时:1003 ms
大概就是 1s,3000 个 SET 和 3000 个 GET 共 6000 个请求。看来单线程性能也是很强的。
本文教程源码 Github 地址:https://github.com/whuanle/RedisClientLearn
以上所述是小编给大家介绍的.NET Core实现简单的Redis Client框架,希望对大家有所帮助。在此也非常感谢大家对易知道(ezd.cc)网站的支持!