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MySQL

MySQL 是一个开源的关系型数据库,你可以使用 MySQL 来作为 CAP 消息的持久化。

配置

要使用 MySQL 存储,你需要从 NuGet 安装以下扩展包:

Install-Package DotNetCore.CAP.MySql

然后,你可以在 Startup.csConfigureServices 方法中添加基于内存的配置项。

public void ConfigureServices(IServiceCollection services)
{
    // ...

    services.AddCap(x =>
    {
        x.UseMySql(opt=>{
            //MySqlOptions
        });
        // x.UseXXX ...
    });
}

MySqlOptions

NAME DESCRIPTION TYPE DEFAULT
TableNamePrefix Cap表名前缀 string cap
ConnectionString 数据库连接字符串 string null

Publish with transaction

ADO.NET with transaction

private readonly ICapPublisher _capBus;

using (var connection = new MySqlConnection(AppDbContext.ConnectionString))
{
    using (var transaction = connection.BeginTransaction(_capBus, autoCommit: false))
    {
        //your business code
        connection.Execute("insert into test(name) values('test')", 
            transaction: (IDbTransaction)transaction.DbTransaction);

        _capBus.Publish("sample.rabbitmq.mysql", DateTime.Now);

        transaction.Commit();
    }
}

EntityFramework with transaction

private readonly ICapPublisher _capBus;

using (var trans = dbContext.Database.BeginTransaction(_capBus, autoCommit: false))
{
    dbContext.Persons.Add(new Person() { Name = "ef.transaction" });

    _capBus.Publish("sample.rabbitmq.mysql", DateTime.Now);

    dbContext.SaveChanges();
    trans.Commit();
}