orleans 2.0 进阶之自定义持久化储存

最新推荐文章于 2024-03-28 08:02:51 发布

rizon886

最新推荐文章于 2024-03-28 08:02:51 发布

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一丶简单介绍下目录结构和项目依赖，如图

二丶主要核心自定义代码

1. 添加自定义实现类 CustomProvider

public class CustomProvider : IGrainStorage
    {
        public Task ClearStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
        {
            throw new NotImplementedException();
        }

        public Task ReadStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
        {
            if(grainType== "Grain.UserGrain")
            {
                var id = grainReference.GetPrimaryKeyLong();

                //模拟从数据库读出User
                var user = new UserState()
                {
                    MobilePhone = "124214214",
                    Name = "李四"
                };

                grainState.State = user;

            }
            return Task.CompletedTask;
        }

        public Task WriteStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
        {

            if (grainType== "Grain.UserGrain")
            {
                var id = grainReference.GetPrimaryKeyLong();

                //模拟保存数据库


            }
            return Task.CompletedTask;
        }
    }

2. 在silo中注入代替默认实现

 .ConfigureServices(services =>
                   {
                       var providerName = "CustomProvider";
                       services.TryAddSingleton(sp =>
                           sp.GetServiceByName<IGrainStorage>(ProviderConstants.DEFAULT_STORAGE_PROVIDER_NAME));

                       services.AddSingletonNamedService<IGrainStorage, CustomProvider>(providerName);
                   })

3. 在grain类上启用

 [StorageProvider(ProviderName = "CustomProvider")]

三丶运行结果如下

示例代码下载地址：SimpleStorage