FreeRedis:实践指南
实际看FreeRedis,先要确认它的用途: FreeRedis 是 .NET40+ redis 客户端,支持集群、哨兵、主从、发布-订阅、lua、管道、事务、流、重新搜索、客户端缓存和池化。网页与浏览器自动化里,登录状态、页面变化和失败恢复往往不稳定。我会选择一个权限清楚的网页流程做端到端短测,检查会话保持、元素定位、错误恢复和工件留存。它适合需要可观测网页自动化流程的开发者;采用前仍要看维护状态和试跑结果。
FreeRedis
- RedisClient 保持所有方法名称与redis-cli一致
- 支持Redis集群(需要redis-server 3.2及以上版本)
- ⛳ 支持Redis哨兵
- 支持Redis主从
- 支持 Redis 发布-订阅
- 支持 Redis Lua 脚本
- 支持管道、交易、DelayQueue、RediSearch
- 支持 Geo 类型命令(需要 redis-server 3.2 及以上版本)
- 支持 Streams 类型命令(需要 redis-server 5.0 及以上版本)
- ⚡ 支持客户端缓存(需要redis-server 6.0及以上版本)
- 支持 Redis 6 RESP3 协议
QQ 群:4336577(已满)、8578575(可用)、52508226(可用)
快速启动
public static RedisClient cli = new RedisClient("127.0.0.1:6379,password=123,defaultDatabase=13");
cli.Serialize = obj => JsonConvert.SerializeObject(obj);
cli.Deserialize = (json, type) => JsonConvert.DeserializeObject(json, type);
cli.Notice += (s, e) => Console.WriteLine(e.Log); //print command log
cli.Set("key1", "value1");
cli.MSet("key1", "value1", "key2", "value2");
string value1 = cli.Get("key1");
string[] vals = cli.MGet("key1", "key2");
支持字符串、散列、列表、集合、排序集、位图、hyperloglogs、geo、流和 BloomFilter。
| 参数 | 默认 | 解释一下 |
|---|---|---|
| 协议 | RESP2 | 如果使用RESP3,需要redis 6.0环境 |
| 用户 | <empty> | Redis服务器用户名,需要redis-server 6.0 |
| 密码 | <empty> | Redis服务器密码 |
| defaultDatabase | 0 | Redis服务器数据库 |
| 最大池大小 | 100 | 连接最大池大小 |
| 最小池大小 | 5 | 连接池最小大小 |
| idleTimeout | 20000 | 连接池中元素的空闲时间(MS),适合连接远程redis服务器 |
| connectTimeout | 10000 | 连接超时(MS) |
| receiveTimeout | 10000 | 接收超时(MS) |
| sendTimeout | 10000 | 发送超时(MS) |
| 编码 | UTF-8 | 字符串字符集 |
| 重试 | 0 | 协议错误重试执行次数 |
| 安全套接字层 | 假的 | 启用加密传输 |
| 姓名 | <empty> | 连接名称,使用client list命令查看 |
| 前缀 | <empty> | 键的前缀,所有方法都会有这个前缀。 cli.Set(前缀+“密钥”,111); |
| exitAutoDisposePool | 真实 | AppDomain.CurrentDomain.ProcessExit/Console.CancelKeyPress 自动处置 |
| subscribeReadbytes | 假的 | 订阅读取字节数 |
IPv6: [fe80::b164:55b3:4b4f:7ce6%15]:6379
//FreeRedis.DistributedCache
//services.AddSingleton<IDistributedCache>(new FreeRedis.DistributedCache(cli));
主从
public static RedisClient cli = new RedisClient(
"127.0.0.1:6379,password=123,defaultDatabase=13",
"127.0.0.1:6380,password=123,defaultDatabase=13",
"127.0.0.1:6381,password=123,defaultDatabase=13"
);
var value = cli.Get("key1");
在127.0.0.1:6379写入数据;从端口6380或6381随机读取数据。
⛳ Redis 哨兵
public static RedisClient cli = new RedisClient(
"mymaster,password=123",
new [] { "192.169.1.10:26379", "192.169.1.11:26379", "192.169.1.12:26379" },
true //This variable indicates whether to use the read-write separation mode.
);
Redis 集群
假设一个Redis集群有3个主节点(7001-7003)和3个从节点(7004-7006),则使用以下代码连接集群:
public static RedisClient cli = new RedisClient(
new ConnectionStringBuilder[] { "192.168.0.2:7001", "192.168.0.2:7002", "192.168.0.2:7003" }
);
⚡ 客户端缓存
需要redis-server 6.0及以上版本
cli.UseClientSideCaching(new ClientSideCachingOptions
{
//Client cache capacity
Capacity = 3,
//Filtering rules, which specify which keys can be cached locally
KeyFilter = key => key.StartsWith("Interceptor"),
//Check long-term unused cache
CheckExpired = (key, dt) => DateTime.Now.Subtract(dt) > TimeSpan.FromSeconds(2)
});
订阅
using (cli.Subscribe("abc", ondata)) //wait .Dispose()
{
Console.ReadKey();
}
void ondata(string channel, string data) =>
Console.WriteLine($"{channel} -> {data}");
xadd + xreadgroup:
using (cli.SubscribeStream("stream_key", ondata)) //wait .Dispose()
{
Console.ReadKey();
}
void ondata(Dictionary<string, string> streamValue) =>
Console.WriteLine(JsonConvert.SerializeObject(streamValue));
// NoAck xpending
cli.XPending("stream_key", "FreeRedis__group", "-", "+", 10);
lpush + blpop:
using (cli.SubscribeList("list_key", ondata)) //wait .Dispose()
{
Console.ReadKey();
}
void ondata(string listValue) =>
Console.WriteLine(listValue);
脚本编写
var r1 = cli.Eval("return {KEYS[1],KEYS[2],ARGV[1],ARGV[2]}",
new[] { "key1", "key2" }, "first", "second") as object[];
var r2 = cli.Eval("return {1,2,{3,'Hello World!'}}") as object[];
cli.Eval("return redis.call('set',KEYS[1],'bar')",
new[] { Guid.NewGuid().ToString() })
管道
using (var pipe = cli.StartPipe())
{
pipe.IncrBy("key1", 10);
pipe.Set("key2", Null);
pipe.Get("key1");
object[] ret = pipe.EndPipe();
Console.WriteLine(ret[0] + ", " + ret[2]);
}
交易
using (var tran = cli.Multi())
{
tran.IncrBy("key1", 10);
tran.Set("key2", Null);
tran.Get("key1");
object[] ret = tran.Exec();
Console.WriteLine(ret[0] + ", " + ret[2]);
}
GetDatabase:切换数据库
using (var db = cli.GetDatabase(10))
{
db.Set("key1", 10);
var val1 = db.Get("key1");
}
扫描
支持集群模式
foreach (var keys in cli.Scan("*", 10, null))
{
Console.WriteLine(string.Join(", ", keys));
}
DelayQueue
var delayQueue = cli.DelayQueue("TestDelayQueue");
//Add queue
delayQueue.Enqueue($"Execute in 5 seconds.", TimeSpan.FromSeconds(5));
delayQueue.Enqueue($"Execute in 10 seconds.", DateTime.Now.AddSeconds(10));
delayQueue.Enqueue($"Execute in 15 seconds.", DateTime.Now.AddSeconds(15));
delayQueue.Enqueue($"Execute in 20 seconds.", TimeSpan.FromSeconds(20));
delayQueue.Enqueue($"Execute in 25 seconds.", DateTime.Now.AddSeconds(25));
delayQueue.Enqueue($"Execute in 2024-07-02 14:30:15", DateTime.Parse("2024-07-02 14:30:15"));
//Consumption queue
await delayQueue.DequeueAsync(s =>
{
output.WriteLine($"{DateTime.Now}:{s}");
return Task.CompletedTask;
});
RediSearch
cli.FtCreate(...).Execute();
cli.FtSearch(...).Execute();
cli.FtAggregate(...).Execute();
//... or ...
[FtDocument("index_post", Prefix = "blog:post:")]
class TestDoc
{
[FtKey]
public int Id { get; set; }
[FtTextField("title", Weight = 5.0)]
public string Title { get; set; }
[FtTextField("category")]
public string Category { get; set; }
[FtTextField("content", Weight = 1.0, NoIndex = true)]
public string Content { get; set; }
[FtTagField("tags")]
public string[] Tags { get; set; } //or string
[FtNumericField("views")]
public int Views { get; set; }
}
var repo = cli.FtDocumentRepository<TestDoc>();
repo.CreateIndex();
repo.Save(new TestDoc { Id = 1, Title = "test title1 word", Category = "class 1", Content = "test content 1 suffix", Tags = "user1,user2", Views = 101 });
repo.Save(new TestDoc { Id = 2, Title = "prefix test title2", Category = "class 2", Content = "test infix content 2", Tags = "user2,user3", Views = 201 });
repo.Save(new TestDoc { Id = 3, Title = "test title3 word", Category = "class 1", Content = "test word content 3", Tags = "user2,user5", Views = 301 });
repo.Delete(1, 2, 3);
repo.Save(new[]
{
new TestDoc { Id = 1, Title = "test title1 word", Category = "class 1", Content = "test content 1 suffix", Tags = "user1,user2", Views = 101 },
new TestDoc { Id = 2, Title = "prefix test title2", Category = "class 2", Content = "test infix content 2", Tags = "user2,user3", Views = 201 },
new TestDoc { Id = 3, Title = "test title3 word", Category = "class 1", Content = "test word content 3", Tags = "user2,user5", Views = 301 }
});
var list = repo.Search("*").InFields(a => new { a.Title }).ToList();
list = repo.Search("*").Return(a => new { a.Title, a.Tags }).ToList();
list = repo.Search("*").Return(a => new { tit1 = a.Title, tgs1 = a.Tags, a.Title, a.Tags }).ToList();
list = repo.Search(a => a.Title == "word" && a.Tags.Contains("user1")).Filter(a => a.Views, 1, 1000).ToList();
list = repo.Search("word").ToList();
list = repo.Search("@title:word").ToList();
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