Redis Summary (ii) How to Use redis in C,

Redis Summary (ii) How to Use redis in C,

In the previous article, we talked about installing redis "Redis Summary (1) Redis installation", and also introduced the advantages and application scenarios of redis. This article focuses on how to use redis and C # In. NET #.

 

The official Redis website provides many open-source C # clients. For example, Nhiredis, ServiceStack. Redis, and StackExchange. Redis. Among them, ServiceStack. Redis should be popular. It provides a complete set of mechanisms for converting strong type objects from Redis data structures and serializing the object json. So here we will only introduce ServiceStack. Redis, which is also the client currently used in our products.

 

　　ServiceStack. Redis address: Https://github.com/ServiceStack/ServiceStack.Redis

 

1. Create a console application and reference the following four libraries related to ServiceStack. Redis. Or install ServiceStack. Redis, a common component of Redis, through Nuget. Download the sample code.

 

2. Create a public RedisCacheHelper for Redis operations,

Using System; using System. collections. generic; using System. configuration; using System. linq; using System. text; using System. web; using ServiceStack. common. extensions; using ServiceStack. redis; using ServiceStack. logging; namespace Weiz. redis. redisTest {public class RedisCacheHelper {private static readonly PooledRedisClientManager pool = null; private static readonly string [] redisHosts = null; public s Tatic int RedisMaxReadPool = int. parse (ConfigurationManager. appSettings ["redis_max_read_pool"]); public static int RedisMaxWritePool = int. parse (ConfigurationManager. deleetask[ "redis_max_write_pool"]); static RedisCacheHelper () {var redisHostStr = ConfigurationManager. deleetask[ "redis_server_session"]; if (! String. isNullOrEmpty (redisHostStr) {redisHosts = redisHostStr. split (','); if (redisHosts. length> 0) {pool = new PooledRedisClientManager (redisHosts, redisHosts, new partition () {MaxWritePoolSize = RedisMaxWritePool, MaxReadPoolSize = RedisMaxReadPool, AutoStart = true });}}} public static void Add <T> (string key, T value, DateTime expiry) {if (value = null) {return;} if (e Xpiry <= DateTime. Now) {Remove (key); return;} try {if (pool! = Null) {using (var r = pool. GetClient () {if (r! = Null) {r. sendTimeout = 1000; r. set (key, value, expiry-DateTime. now) ;}}} catch (Exception ex) {string msg = string. format ("{0 }:{ 1} exception! {2} "," cache "," Storage ", key) ;}} public static void Add <T> (string key, T value, TimeSpan slidingExpiration) {if (value = null) {return;} if (slidingExpiration. totalSeconds <= 0) {Remove (key); return ;}try {if (pool! = Null) {using (var r = pool. GetClient () {if (r! = Null) {r. sendTimeout = 1000; r. set (key, value, slidingExpiration) ;}}} catch (Exception ex) {string msg = string. format ("{0 }:{ 1} exception! {2} "," cache "," Storage ", key) ;}} public static T Get <T> (string key) {if (string. isNullOrEmpty (key) {return default (T);} T obj = default (T); try {if (pool! = Null) {using (var r = pool. GetClient () {if (r! = Null) {r. sendTimeout = 1000; obj = r. get <T> (key) ;}}} catch (Exception ex) {string msg = string. format ("{0 }:{ 1} exception! {2} "," cache "," get ", key) ;}return obj ;}public static void Remove (string key) {try {if (pool! = Null) {using (var r = pool. GetClient () {if (r! = Null) {r. sendTimeout = 1000; r. remove (key) ;}}} catch (Exception ex) {string msg = string. format ("{0 }:{ 1} exception! {2} "," cache "," delete ", key) ;}} public static bool Exists (string key) {try {if (pool! = Null) {using (var r = pool. GetClient () {if (r! = Null) {r. sendTimeout = 1000; return r. containsKey (key) ;}}} catch (Exception ex) {string msg = string. format ("{0 }:{ 1} exception! {2} "," cache "," Whether ", key) ;}return false ;}}}

Note: RedisCacheHelper uses the Client Connection Pool mode, which ensures the highest access efficiency. It also supports read/write splitting and load balancing.

 

3. Configuration File

    <!-- redis Start   -->    <add key="SessionExpireMinutes" value="180" />    <add key="redis_server_session" value="127.0.0.1:6379" />    <add key="redis_max_read_pool" value="3" />    <add key="redis_max_write_pool" value="1" />    <!--redis end-->

　

4. Test Program call

Class Program {static void Main (string [] args) {Console. writeLine ("Redis write cache: zhong"); RedisCacheHelper. add ("zhong", "zhongzhongzhong", DateTime. now. addDays (1); Console. writeLine ("Redis get cache: zhong"); string str3 = RedisCacheHelper. get <string> ("zhong"); Console. writeLine (str3); Console. writeLine ("Redis get cache: nihao"); string str = RedisCacheHelper. get <string> ("nihao"); Console. writeLine (str); Console. writeLine ("Redis get cache: wei"); string str1 = RedisCacheHelper. get <string> ("wei"); Console. writeLine (str1); Console. readKey ();}}

　　

5. output results