(五)surging 微服务框架使用系列之缓存-reids
作者:互联网
1.服务跟客户端初始化的时候需要添加缓存配置
1 var host = new ServiceHostBuilder() 2 .RegisterServices(builder => 3 { 4 builder.AddMicroService(option => 5 {
6 option .AddCache()//缓存初始化
28 });
29 }).Configure(build =>
47 build.AddCacheFile("cacheSettings.json", optional: false,reloadOnChange:true))
48 .UseStartup<Startup>()
52 .Build();
2.配置文件(服务端跟客户端都需要)
{ "CachingSettings": [ { "Id": "ddlCache", "Class": "Surging.Core.Caching.RedisCache.RedisContext,Surging.Core.Caching", "InitMethod": "", "Maps": null, "Properties": [ { "Name": "appRuleFile", "Ref": "rule", "Value": "", "Maps": null }, { "Name": "dataContextPool", "Ref": "ddls_sample", "Value": "", "Maps": [ { "Name": "Redis",//redis配置 "Properties": [ { "Name": null, "Ref": null, "Value": ":你的密码@你的ip:6379::1",//reids 内存数据库连接字符串传 后面的1 代表你当前连接的是哪个库 "Maps": null } ] }, { "Name": "MemoryCache",//本机内存 "Properties": null } ] }, { "Name": "defaultExpireTime",//默认超时时间 "Ref": "", "Value": "120", "Maps": null }, { "Name": "connectTimeout",//连接超时时间 "Ref": "", "Value": "120", "Maps": null }, { "Name": "minSize", "Ref": "", "Value": "1", "Maps": null }, { "Name": "maxSize", "Ref": "", "Value": "10", "Maps": null } ] } ] }
3.服务端配置
[Command(RequestCacheEnabled = true)] [InterceptMethod(CachingMethod.Get, Key = "GetUser_id_{0}", CacheSectionType = SectionType.ddlCache, Mode = CacheTargetType.Redis, Time = 480)] Task<UserModel> GetUser(UserModel user);
(1)在容错规则里面配置开启缓存
(2)在缓存拦截器里面配置缓存的方法,key,类型,超时时间等等。。
(3)传递的方法参数如果是model类型,就需要设置 [CacheKey(1)]来标识缓存key, 比如传递UserModel,
设置UserId 为1,Name 为fanly, 设置的KEY为GetUserName_name_{1}
那么缓存的key就会生成GetUserName_name_fanly, key 如果设置为GetUserName_id_{0}
那么缓存的key就会生成GetUserName_id_1,传递的方法参数是string,int 类型就不需要设置 [CacheKey(1)]
(4)Remove模式下,移除的缓存是一个真个列表
public class UserModel { [CacheKey(1)] public int UserId { get; set; } [CacheKey(2)] public string Name { get; set; } public int Age { get; set; } }
4.客户端调用配置
客户端初始化的时候 需要添加.AddClientIntercepted(typeof(CacheProviderInterceptor)),其中CacheProviderInterceptor是作者给我们实现的一个实例,代码如下:
public class CacheProviderInterceptor : CacheInterceptor { public override async Task Intercept(ICacheInvocation invocation) { var attribute = invocation.Attributes.Where(p => p is InterceptMethodAttribute) .Select(p => p as InterceptMethodAttribute).FirstOrDefault(); var cacheKey = invocation.CacheKey == null ? attribute.Key : string.Format(attribute.Key ?? "", invocation.CacheKey); await CacheIntercept(attribute, cacheKey, invocation); } private async Task CacheIntercept(InterceptMethodAttribute attribute, string key, ICacheInvocation invocation) { ICacheProvider cacheProvider = null; switch (attribute.Mode) { case CacheTargetType.Redis: { cacheProvider = CacheContainer.GetService<ICacheProvider>(string.Format("{0}.{1}", attribute.CacheSectionType.ToString(), CacheTargetType.Redis.ToString())); break; } case CacheTargetType.MemoryCache: { cacheProvider = CacheContainer.GetService<ICacheProvider>(CacheTargetType.MemoryCache.ToString()); break; } } if (cacheProvider != null) await Invoke(cacheProvider, attribute, key, invocation); } private async Task Invoke(ICacheProvider cacheProvider, InterceptMethodAttribute attribute, string key, ICacheInvocation invocation) { switch (attribute.Method) { case CachingMethod.Get: { var retrunValue = await cacheProvider.GetFromCacheFirst(key, async () => { await invocation.Proceed(); return invocation.ReturnValue; }, invocation.ReturnType, attribute.Time); invocation.ReturnValue = retrunValue; break; } default: { await invocation.Proceed(); var keys = attribute.CorrespondingKeys.Select(correspondingKey => string.Format(correspondingKey, invocation.CacheKey)).ToList(); keys.ForEach(cacheProvider.RemoveAsync); break; } } } }
找到InterceptMethodAttribute 的配置属性根据配置的缓存类型 初始化ICacheProvider接口,这个接口是缓存的一些常用方法,(当然我们也直接可以在代码中或者这个接口的实例,从而在缓存计算一些值)
然后在Invoke方法里面执行缓存的方法
5.其他
关于缓存拦截 我目前的版本是0.7.0.1 是只能在调用代理的时候用使用。因为在代理的时候才会根据容错规则开启缓存开关 来决定执行是否走缓存拦截。新版本的http支持 实现了缓存拦截。所以有需要的小伙伴可以升个级试试看。
关于缓存的连接 也是通过注册中心来检查它的健康状态。
最后运行程序,得到结果
标签:缓存,Name,attribute,reids,surging,key,invocation,null 来源: https://www.cnblogs.com/Jeely/p/10774648.html